A PROGRESS REPORT ON RESULTS OF TEST- DRILLING

AND

GROUND - WATER INVESTIGATIONS OF THE

SNAKE PLAIN AQUIFER,

SOUTHEASTERN IDAHO

PART I

Mud Lake Region, 1969 - 70

PART 2

Observation Wei Is South

of

Arco and West of Aberdeen

IDAHO DEPARTMENT OF WATER ADMINISTRATION

WATER INFORMATION BULLETIN NO. 3 2

WATER INFORMATION BULLETIN NO. 32

A PROGRESS REPORT ON

RESULTS OF TEST-DRILLING AND GROUND-WATER INVESTIGATIONS

OF THE SNAKE PLAIN AQUIFER, SOUTHEASTERN IDAHO

Part 1

Mud Lake Region, 1969-70

and

Part 2

Observation Wells South of Arco and West of Aberdeen

By

E.G. Crosthwaite

Prepared by the United States Geological Survey

in cooperation with

Idaho Department of Water Administration

Published by

Idaho Department of Water Administration

R. Keith Higginson

Director

October 1973

PART 1

MUD LAKE REGION, 196~-70

PREFACE

The Snake Plain aquifer, as defined by Mundorff, Crosthwaite, and Kilburn (1964, p. 142), is a series of basalt flows and intercalated pyroclastic and sedimentary materials that underlies the Snake River Plain east of Bliss (fig. 1 ). The aquifer is about 9,500 square miles in areal extent and yielded about a million acre-feet of water to wells in 1969. Approximately 6Y,-million acre-feet of water is recharged annually to this aquifer by seepage loss from the Snake River and its tributaries, by underflow from tributary valleys, by the downward percolation of water applied for irrigation, and by precipitation on the Plain. Water is discharged from the aquifer through springs and by pumping for irrigation, municipal, industrial, stock, and domestic use. Although the aquifer has been extensively studied and its general extent and properties are known, it is so large and thick that data on the distribution of basalt flows and interbedded sedimentary deposits that control the movement of ground water have not been obtained at several places of great current importance. Also, there are large areas where the position of the water table and the potential yield of the aquifer are not known.

The objectives of this investigation are to obtain ( 1) information descriptive of elevations and fluctuations of the water table, water-table gradients, and the distribution of transmissivity, in areas of the Snake Plain aquifer where data are lacking; (2) details of stratigraphic and hydrologic properties at localities selected as being suitable for pumping large quantities of ground water in exchange for surface water1; (3) hydrologic details in the eastern part of this aquifer, where the greatest amount of recharge occurs, so as to interpret better the distribution of recharge to spring discharge areas; and (4) water-level and stratigraphic data in the area of the Mud Lake-Market Lake barrier so as to better define recharge relations and large water-level differentials occurring in and around this barrier. In addition, it is anticipated that all the data collected will be integrated into an existing analog model of the Snake Plain aquifer so that the long-term effects of development of the aquifer can be better predicted.

The Idaho Department of Water Administration has the responsibility of administering the water resources of Idaho, and for this reason it is vitally interested in basic data descriptive of the water resources of the Snake River Plain. Because the U. S. Bureau of Reclamation is actively developing the water resources available in various parts of the Plain, it needs basic data which will be useful in selecting areas suitable for development and in evaluating effects of development. The U. S. Geological Survey has a responsibility for collecting basic data and for appraising the water resources of Idaho. Because of their common interests, and in recognition of the need for information about the water resources of the Snake Plain aquifer, these three agencies entered into a cooperative agreement whereby the U. S. Geological Survey and the U.S. Bureau of Reclamation would initiate, in

1 The U.S. Bureau of Reclamation is investigating the feasibility of diverting surface water frorn presently irrigated land to areas of inadequate surface-water supply or areas of no surface-water supply and replacing the diverted surface water with ground water.

V

July 1969, a 4-year project whose goal is to satisfy the objectives described above.

To provide for timely release of the data collected during this 4-year project, 1t 1s planned that a series of progress reports describing the work accomplished during each phase of the project will be prepared. This report, which describes the work accomplished in the Mud Lake region in the northeastern part of the Snake River Plain during the period July 1969 to July 1970, is the first report of this series.

VI

CONTENTS

Page

Abstract .............................................................. 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Location and General Features ......................................... 2 Previous Work ...................................................... 4 Well-Numbering System .............................................. 4 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Geohydraulic Relations of the Mud Lake-Market Lake Barrier ..................... 6 Previous Concepts of the Mud lake-Market Lake Barrier ..................... 6 Results of Test Drilling ............................................... 7 Geophysical Studies ................................................. 9 Interpretation of Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Additional Study Needs ................................................. 12 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Appendix ............................................................ 15

I LL UST RATIONS

Figure 1. Map of the study area ................................................ 3 2. Diagram of well-numbering system ...................................... 5 3. Map showing water-level contours ................................. in pocket 4. Geologic sections .............................................. in pocket 5. Fence diagram ................................................ in pocket 6. Geologic map of the study area ................................... in pocket

TABLES

Table 1. Observation well data ............................................... 17

vn

A PROGRESS REPORT ON

RESULTS OF TEST-DRILLING AND GROUND-WATER INVESTIGATIONS

OF THE SNAKE PLAIN AQUIFER, SOUTHEASTERN IDAHO

Part 1

Mud Lake Region, 1969-70

By E.G. Crosthwaite

ABSTRACT

The results of drilling test holes to depths of approximately 1,000 feet in the Mud Lake region show that a large part of the region is underlain by both sedimentary deposits and basalt flows. At some locations, predominantly sedimentary deposits were penetrated; at others, basalt flows predominated. The so-called Mud Lake-Market Lake barrier denotes a change in geology. From the vicinity of the barrier area, as described by Stearns, Crandall, and Steward (1938, p. 111 ), up the water-table gradient for at least a few tens of miles, the saturated geologic section consists predominantly of beds of sediments that are intercalated with numerous basalt flows. Downgradient from the barrier, sedimentary deposits are not common and practically all the water-bearing formations are basalt, at least to the depths explored so far. Thus, the barrier is a transition zone from a sedimentary-basaltic sequence to a basaltic sequence. The sedimentary-basaltic sequence forms a complex hydrologic system in which water occurs under water-table conditions in the upper few tens of feet of saturated material and under artesian conditions in the deeper material in the southwest part of the region. The well data indicate that southwest of the barrier, artesian pressures are not significant. Southwest of the barrier, few sedimentary deposits occur in the basalt section and, as described by Mundorff. Crosthwaite, and Kilburn (1964). ground water occurs in a manner typical of the Snake Plain aquifer. In several wells, artesian pressures are higher in the deeper formations than in the shallower ones, but the reverse was found in a few wells. The available data are not adequate to describe the water-bearing characteristics of the artesian aquifer nor the effects that pumping in one zone would have on adjacent zones. The water-table aquifer yields large quantities of water to irrigation wells.

Although the Mud Lake region is within the Snake River Plain, the geology and hydrology of the region differs significantly from that of most of the Plain, and for this reason the aquifers in the region should be considered as separate hydrologic units. Geologic sections and a fence diagram show that sediments dominate in the region of the Mud Lake-Market Lake barrier whereas basalts are most common in adjoining areas. Tentative correlations of hydrologic units are shown in the cross sections and fence diagram.

1

As an aid to continued development of needed ground-water supplies in the Mud Lake region, the water-bearing characteristics of the deep artesian aquifers should be tested and exploration of aquifers occurring at depths greater than those penetrated to date should be undertaken.

INTRODUCTION

Purpose and Scope

Water in the Mud Lake region (fig. 1) serves two important functions. Not only is it used for the irrigation of extensive farmlands in the region, but it has been postulated to be an important source of recharge to the s·nake Plain aquifer. Movement of recharge to the Snake Plain aquifer is, however, complicated by the fact that in the vicinity of Mud Lake and Market Lake there is a hydrologic barrier to the movement of ground water. This barrier occurs along a northwest-trending line that extends through Market and Mud Lakes. The presence of this barrier is indicated by a change in slope of the water table. Northeast of the barrier the water table is at a relatively shallow depth (a few feet to a few tens of feet) and is very flat (it has a gradient of about 2 feet per mile). Southwest of the barrier the water table is at a considerably greater depth (several hundred feet) and the water table is again relatively flat (the gradient is about 5-10 feet per mile). At the barrier, in the area extending from northwest of Mud Lake to southeast of Market Lake, the water-table gradient is quite steep, about 30-60 feet per mile, and a considerable range occurs in the elevation of water levels in wells screened or perforated at different depths.

Previous investigators (Mundorff and others, 1964, pl. 4) have indicated that about 2.2 million acre-feet of ground water flows across the barrier annually as recharge to the Snake Plain aquifer. Later investigators (Norvitch and others, 1969, p. 39) had difficulty, however, in logically assigning aquifer transmissivity values large enough to transmit this quantity of water through the barrier. This difficulty made apparent the need for additional data descriptive of the geologic and hydrologic characteristics of the barrier.

The purposes of this report are, therefore, to ( 1) present the data obtained during the period 1969-70 from test wells drilled in and around the barrier and from adjacent areas; (2) describe water-level and stratigraphic relations in and near the Mud Lake-Market Lake barrier as indicated by these data; (3) relate the data to existing hydrologic concepts of the barrier and, where necessary, to revise those concepts; (4) evaluate the adequacy of the data collected to describe existent hydrologic relations; and (5) delineate areas where additional hydrologic data are needed.

Location and General Features

The Mud Lake region is in the northeastern part of the Snake River Plain in eastern Idaho (fig. 1 ). The Mud Lake basin encompasses a broad, shallow, closed depression about

2

0 en ~

FIGURE 1.

0

Map of southern Idaho showing the Snake River Plain and area covered by this report.

3

20 miles wide. Mud Lake is in the lowest part of this depression. The Market Lake basin is a much smaller depression that also contains a lake. Market Lake basin is open to the Snake River on the southeast and is separated from the Mud Lake basin by a topographic divide that is a few tens of feet in height. Mud Lake covers about 12 square miles when the lake is full, whereas Market Lake covers only several tens of acres. The principal area of study includes the basins containing the lakes and the area immediately adjacent to the basins. However, to assure that the geology and hydrology of these basins as presented in this report are in harmony with that in adjoining areas, pertinent data from outside these basins are utilized in the following discussions. For the purpose of this report, the study area shown in figure 1 is here designated the Mud Lake region. This is in accord with usage in the first comprehensive report on the area (Stearns and others, 1939).

Previous Work

Stearns, Crandall, and Steward ( 1938, p. 111) stated that a definite ground-water cascade, caused by a ground-water barrier, exists between the mouth of Birch Creek and Idaho Falls along a curved line that passes through the south side of Mud Lake and the west side of Market Lake. Stearns, Bryan, and Crandall (1939, p. 50-57, 59-60) described a perched water table and a main water table in the vicinity of Mud Lake and the Mud Lake basin. They also described the lakebeds which directly underlie both the Mud Lake and Market Lake basins and the basalt flows which encroach into the basin (Stearns and others, 1939, p. 37-38). Mundorff, Crosthwaite, and Kilburn (1964, p. 132-136) discussed the barrier and ground-water conditions in the Mud Lake area.

Well-Numbering System

The well-numbering system used by the U.S. Geological Survey in Idaho indicates the location of wells within the official rectangular subdivision of the public lands, with reference to the Boise base line and meridian. The first two segments of the number designate the township and range. The third segment gives the section number, followed by three letters and a numeral, which indicate the quarter section, the 40-acre tract, the 10-acre tract, and the serial number of the well within the tract, respectively. Quarter sections are lettered a, b, c, and d in counterclockwise order, from the northeast quarter of each section (fig. 2). Within the quarter sections, 40-acre and 10-acre tracts are lettered in the same manner. Well 4N-35E-14aaa1 is in the NEY.NEY.NEY. sec. 14, T. 4 N., R. 35 E., and is the first well visited in that tract.

Several wells in the report area are equipped with piezometers and each piezometer has been assigned a well number. The shallowest piezometer in the well has the lowest serial number and the next deeper piezometer has the next higher serial number.

4

6

7

,. 19

30

31

FF\ I ii:: I !

I

EE " '" I :,: IN ,

IW BOISE BASE LINE IE 2E /4E 35E 36E

IS

l± '" I "' 0 I '"

R. 35 E. I

SECTION 14

v ' I 'oool,.. ' 4 3 2 ' --+-c

~-b ~b_6Sl-'

• 9 10 II 7.2

------b t ---- ~ _c_l_~.

~ ' ' ' . ~ : I C : d

17 16 " 13 T ' ' ' ' 4 L----+- -14- ---4---

20 21 22 23 N : I : 24 ' ' ' ' : I

29 28 27 26 25 ----- ~ -----+----- d- --- . ' ' ' : ' I ' :

32 33 34 35 36 : I : '

FIGURE 2. Diagram showing well-numbering system.

(Using well 4N-35E-14aaa1.)

Acknowledgments

The U. S. Bureau of Reclamation supplied well data including drillers' logs, core samples, and water-level measurements for the seven wells drilled or deepened as part of this study and for other wells constructed during previous test drilling in the Bureau of Reclamation's Lower Teton Basin Project area.

5

GEOHYDRAULIC RELATIONS OF THE MUD

LAKE-MARKET LAKE BARRIER

Previous Concepts of the Mud Lake-Market Lake Barrier

Stearns, Crandall, and Steward (1938, p. 111) state: The contour lines show that a definite ground-water cascade exists between the mouth of Birch Creek and Idaho Falls, along a curved line passing through the south side of Mud Lake and the west side of Market Lake. Some large faults pass into the region of this cascade from the adjacent mountains and became buried by Pleistocene flows. Faults may cause this ground-water cascade by the downward displacement of the impermeable basement in this area, but it is more probably caused by the ending of clay beds or other perching formations.

Stearns, Bryan, and Crandall (1939, p. 50) state that Mud Lake and the water found in shallow wells in the vicinity of the lake form a perched body of water that lies a few hundred feet above the water table of a deeper body of ground water. They also say that at Market Lake the hydrology and geology are somewhat similar to those at Mud Lake (Stearns and others, 1939, p. 59-60).

In general, previous investigators have noted that northeast and southwest of the Mud Lake-Market Lake barrier where water-table gradients are low (5-10 feet per mile), a very permeable basalt is the principal water-bearing formation, whereas at the barrier, where gradients are steep (30-60 feet per mile), the principal water-bearing formations are less permeable clay, silt, sand, and some gravel. Also, they believed that the ground water occurs principally under perched and water-table conditions, although weak artesian pressures were recognized in shallow wells on the east side of Market Lake (well data in files of U. S. Geological Survey) and in a narrow strip extending from Hamer to the site of former Spring Lake northwest of Mud Lake (Stearns and others, 1939, pl. 13). See figure 3. Using this information, they deduced that the barrier acts as a leaky dam. That is, as water moves laterally through the barrier it also percolates downward through the sedimentary beds. For this reason, the shallow beds contain progressively less water and depths to water increase toward the southwestern edge of the barrier. Soon after irrigation began in the Mud Lake-Market Lake area in the early 1900's, percolation of irrigation water caused an expansion of the perched water table in the sediments (mostly on the south and west sides of the barrier), thereby increasing the volume of saturated sediments. The area of perched water was again increased significantly in recent years, particularly south and west of Mud Lake, because large amounts of ground water pumped in the area north of Mud Lake were conveyed by canals to irrigated tracts west and southwest of the lake.

For convenience in the following discussion, the term barrier will be retained, but, as will be pointed out later, the concept of the barrier is changed by the data collected during this study.

6

Results of Test Drilling

Five wells were drilled to depths of 1,000 feet or more and two pre-existing wells were deepened in the general vicinity of the barrier in the summer and autumn of 1969 by the U. S. Bureau of Reclamation. In 1967 and 1968, prior to the beginning of this study, the Bureau drilled several deep test holes near and northeast of Market Lake. Data from these wells, a few private wells, and from municipal wells several hundred feet deep, provide most of the basis for the interpretations made in this report. Some of these data are summarized in table 1. Drillers' logs and other additional data are presented in the appendix, and well locations are given in figure 5. Pertinent water levels obtained in other wells were also used in this study. However, most of these other wells extend only a few tens to a few hundreds of feet below water level, and drillers' logs for these wells are not presented because they do not indicate geologic and hydrologic conditions to any significant depth.

The five wells constructed for this study were drilled, using air-rotary or cable-too! equipment, to depths of approximately 500 feet and then were core-drilled to approxi­mately 1,000 feet. Deepening of the two pre-existing wells was accomplished by core drilling. Six of these seven wells contain two to five piezometers each. (See Appendix for well-construction diagrams and logs.) The one well in which piezometers were not installed was equipped with a continuous water-level recorder. Although each piezometer is a separate and distinct well that was constructed for the purpose of monitoring water levels, in the interest of conserving space and for ease of presentation, the maps and the geologic sections show only one well at each piezometer cluster.

Geophysical and drillers' logs of wells in the area of the barrier show that upgradient from the barrier a considerable number of sand, silt, and clay beds are interbedded with basalt flows; for example, 610 feet of the log of well 8N-34E-17ccc6 shows sediments and 390 feet basalt (fig. 4, section B-B'). The sediments consist of beds of clay that resemble varved glacial clay at some places, silt, and fine-to-coarse sands that range in thickness from a few inches to more than 50 feet. At some places, the clays and sands contain fine-to-coarse gravel.

Well logs show that both the essentially flat-lying sediments and the basalt extend several miles north and east of the barrier, although the areal extent of individual sedimentary beds and basalt flows cannot be determined with any degree of confidence. Southwest of the barrier, except in the area near the mouth of Birch Creek where thick deposits of sediments were found in wells, basalt is the predominant rock type and the sedimentary beds are sparse and thin.

The geologic map (fig. 6) shows the surficial geology in the Mud Lake region. Informal names used by Stearns, Bryan, and Crandall (1939, pl. 3) were assigned to the geologic units for convenience. These units are also shown on the geologic sections and fence diagram (figs. 4 and 5). The basalt and interbedded sedimentary deposits shown are a part of the Snake River Group of Pleistocene and Holocene age. These rocks and the more recent alluvium are

7

the principal water-bearing formations explored by drilling. The silicic volcanic rocks shown on the geologic map were encountered in four wells (figs. 4 and 5). These rocks also contain ground water, although they are generally not as permeable as the basalt.

Test-drilling data and other well data showed that north and northeast of the barrier water in the upper zone of saturation occurs under water-table conditions. However, at the barrier area and for an unknown distance to the northeast, the water in the deeper aquifers is under artesian pressure. Northwest and west of Mud Lake and southwest of Terreton and Monteview, perched ground water occurs at shallow depth.

Wells 8N-34E-17ccc3-6 were completed so that water levels in four different water-bearing zones could be monitored at this location. Another well a few feet to the west (8N-34E-17ccc7) monitors the shallowest water level. Although the water level for each zone is different, those in the second and third shallowest zones are not greatly different. The following are the water levels and the water-bearing zones monitored at this site.

Depth to Piezometer Depth Water

Well or Monitored (feet) No. Casing Size (feet) (12-13-69) Aquifer

8N-34E-17ccc7 6-in. casing 35 to 47 30± Sand 17ccc3 8-in. casing 340 to 350 46.7 Sand 17ccc4 1-in. pipe C 460 to 545 45.0 Sand & gravel 17ccc5 3/4-in. pipe 8 566 to 888 170.1 Basalt 17ccc6 3/4-in. pipe A 912 to 1,006 223.9 Basalt

As indicated above, water levels at this site are not consistent. The water level in the 6-inch well is about 15 feet higher than that in the next zone. The water level in the 1-inch pipe is 1.7 feet higher than in the 8-inch casing. At deeper depths, the water levels are lower. A more typical example of water levels at different depths below land surface is illustrated by wells 6N-36E-11aba1-4 in the following table.

Depth to Piezometer Depth Water

Well or Monitored (feet) No. Casing Size (feet) (12-13-69) Aquifer

6N-36E-11aba1 10-in. casing 14 to 245 70.7 Basalt 11aba2 3/4-in. pipe C 258 to 615 35.1 Basalt 11aba3 3/4-in. pipe B 628 to 915 34.8 Basalt & sand 11aba4 3/4-in. pipe A 925 to 990 18.1 Basalt

8

At this site, the water table is about 70 feet below land surface and the deeper water-bearing zones are under artesian pressure, with the deeper zones having the higher heads. These two examples demonstrate the variety of ground-water occurrences in the area. The approximate positions of the water levels in piezometers and the water-bearing formation monitored by the piezometers are shown in the geologic sections (fig. 4).

Geophysical Studies

In 1961, 1963, and 1964, several gravity surveys were made by the U.S. Geological Survey in the eastern Snake River Plain which included a part of the Mud Lake-Market Lake region. Additional gravity observations were made in 1970 in the study area to determine if this geophysical method could be used to interpret the geology of the region and thus further the understanding of geologic-hydrologic relations. The resulting gravity map did not show any apparent relationship of the variations in gravity to the geology of the barrier. Therefore, the gravity data are not included in this report.

Interpretation of Data

The geologic data from the test drilling show that much of the Mud Lake region is underlain by both basalt flows and sedimentary deposits to a depth of at least 1,000 feet. Southwest of the Mud Lake-Market Lake barrier, wells in excess of 1,000 feet in depth have found mostly basalt, and the thick interbedded sediments found at and northeast of the barrier are not present.

The well logs on the geologic sections (fig. 4) show the basalt flows and the interbedded sedimentary deposits. The alluvium which is at the surface east of Henrys Fork is overlain by basalt of Little Grassy Butte and underlain by early basalt west of the river (geologic section A-A'). The alluvium pinches out near Market Lake. West of Market Lake, the lakebeds of Terreton occur at the surface and a thick lens of sediments occurs at a depth of about 600 feet. The only other significant sedimentary deposits are far to the west at the mouth of the Birch Creek basin and in the vicinity of the Big Lost River playa beyond the area of study. Geologic section B-B' shows that north of Terreton sedimentary deposits predominate in the geologic section, but south of Terreton, sediments are not significant. Geologic section C-C', about 15 miles east of section B-B', illustrates the same relationship as shown in B-B', but the well data are more numerous and more detail can be shown. The correlation of units between wells is tentative, but it serves to illustrate the general geologic conditions of the region as revealed by the test drilling and other well data.

In order to show the geologic conditions in a perspective not possible with geologic sections, a fence diagram was constructed (fig. 5). The fence diagram shows a thick sequence of sediments in the Market Lake-Idaho Falls-Rexburg area and northwest of Mud Lake. Several basalt flows are intercalated in sect iments. There are sedimentary deposits in the

9

subsurface between these two parts of the region, but they are thinner and the basalt units are more numerous and thicker. Northeast of a line between Dubois and St. Anthony, sparse data imply that the sediments become subordinate or even insignificant. Apparently, the streams were eroding and not depositing sediments in this part of the area. In the southwestern part of the region, basalt predominates and sedimentary beds are sparse and thin. It should be noted that geologic conditions below the depths drilled are unknown.

The water-level contour map (fig. 3) was constructed on the water table in the sedimentary aquifer except in that part of the area where perched water is known to occur. The hydrologic data show that, in general, upstream from the barrier, ground water occurs under water-table conditions in the uppermost saturated zone, although there are local areas with weak or low artesian pressures as described previously. However, in the deeper zones, ground water is under artesian pressure and contours for the artesian pressure surface are not shown. Data are not adequate to determine the northeasterly extent of the artesian aquifers from Mud Lake, but the artesian aquifers may pinch out north and east of Dubois, where the water-table steepens sharply at about the 4,800-foot contour. Water-level data from the test wells show that artesian pressures begin to develop about halfway between Rexburg and Market Lake and become progressively greater in the direction of the barrier (fig. 4, geologic section A-A'). Artesian pressures are found in both basalt and sediments. In general, the artesian pressures cause the water levels to rise above the water table and the deeper the well the higher the artesian pressure. For example, in wells 6N-36E-11aba1-4, described above, the elevation of the water table is at about 4,747 feet above mean sea level; the water level in the first artesian zone is about 4,783 feet, in the second zone at about 4,783 feet also, and in the third zone at 4,801 feet or 250 feet higher than the 4,570-foot contour 8 miles to the southwest (fig. 3). This implies a hydraulic gradient of something more than 30 feet per mile. In this and other test wells, the elevations of the artesian pressures range from about 1 to 53 feet above the elevation of the water table at the well site. Two private wells, 5N-35E-4bda2 and 4N-36E-1dac1, reportedly had artesian heads 200 feet higher than the elevation of the water table. (See fig. 4).

There are exceptions to this zonation of artesian pressure. In the wells north of Monteview that were described previously (8N-34E-17ccc3-6), the shallow water is p·erched and the deeper zones are under artesian pressure. The deeper water levels in this well are significantly lower than in a private well (6N-34E-7ba1), which is about 10.5 miles to the south. The reason for this is not clear, but the barrier probably does not extend from Mud Lake to Birch Creek valley as was described in previous reports. Instead, it may trend north or even northeast of Mud Lake.

Downstream from the barrier, the only artesian pressures are local occurrences that are common in basalt of the Snake River Group and are on the order of a few tenths of a foot to a few feet higher than the water table. This is caused by the interfingering of lava flows and the generally low vertical permeability of the basalts. Mundorff, Crosthwaite, and Kilburn (1964, p. 143) describe this factor in causing slight but significant differences in water levels in successive permeable zones in the basalt. Morris and others (1964, p. 40-42)

10

describe the upward and downward flow of water from one permeable zone to another in bore holes on the National Reactor Testing Station and this phenomenon has been observed elsewhere in the Snake River Plain.

Upstream from the barrier, ground water in the non-artesian aquifer moves downgradient, or about normal to the water-level contours, southwestward and westward toward the barrier. In the downgradient part of the barrier, the water has a large downward component of movement as it percolates through the basalt and sediments to join the main body of water in the Snake Plain aquifer.

The water in the artesian aquifers appears to move in approximately the same direction as the non-artesian water except in the area northwest of Mud Lake. The reason for artesian pressures lower than the water table in well 8N-34E-17ccc6 is not apparent from the data. Either lithologic changes or some structural feature (or both) could cause this condition. For example, Stearns, Bryan, and Crandall (1939, p. 43) and Mundorff, Crosthwaite, and Kilburn (1964, p. 133) suggest that there is a fault along the north side of Mud Lake, but Malde {1971) found no evidence of faulting.

In general, in the area where the hydraulic heads in the artesian aquifer are above the water levels in the water-table aquifers, upward leakage recharges the water-table aquifer. The data are not adequate to evaluate the amount of upward leakage, but it may be a significant amount in the Mud Lake part of the region.

The artesian pressures found in the test and other wells indicate that the net hydraulic gradient is steeper than was previously known. Although the hydraulic properties of the artesian aquifers are not known, the data suggest that much of the ground water in the region moves through the artesian aquifers before discharging to the Snake Plain aquifer southwest of the barrier. This study has significantly modified the concept of the barrier. Previous descriptions imply that the barrier is more or less a linear phenomena with a restricted areal extent. Actually, the barrier denotes a change in geology. From the vicinity of the barrier area, as described by Stearns, Crandall, and Steward ( 1938, p. 111), up the water-table gradient for at least a few tens of miles, the saturated geologic section consists predominantly of beds of sediments that are intercalated with numerous basalt flows. Downgradient from the barrier, sedimentary deposits are not common and practically all the water-bearing formations are basalt, at least to the depths explored so far. Thus, the barrier is a transition zone from a sedimentary-basaltic sequence to a basaltic sequence.

The Mud Lake region lies close to high mountain ranges which shed large amounts of sediments during the Pleistocene and Holocene Epochs, particularly during times of glaciation and high precipitation. These sediments were deposited in streams and lakes in low areas. Basalt flows of local origin were erupted at infrequent intervals during deposition of the sediments. Eruptions of basalt on the Snake River Plain south and west of the Mud Lake region impeded the spread of sediments in those directions. The complex interbedding of basalt and sediments produced a hydrologic system different from the Snake Plain

11

aquifer system and thus the Mud Lake region should be excluded from the Snake Plain aquifer.

This study did not develop new data to either support or change the estimate by Mundorff, Crosthwaite, and Kilburn (1964, p. 136) of the quantity of ground-water flow in the Mud Lake part of the region. It should be noted that the direction of ground-water flow as shown on their plate 4 applies only to the water table and not to the water in the artesian aquifers. Irrigation on the Egin Bench has undoubtedly influenced the water table and artesian pressures in the Mud Lake area, but an assessment of this effect is not possible at this time. Perhaps modification and stressing of the analog model might shed some light on this problem, and an analysis using this model will be attempted later in the project.

ADDITIONAL STUDY NEEDS

In the area of Mud Lake, a few hundred irrigation wells pump water from the water-table aquifer and Mud Lake receives much of its inflow from ground water. Surface-water use for irrigation is of minor importance. In the area of Market Lake and the Henrys Fork drainage, the reverse is true. Surface water is the major irrigation supply and ground-water use is minor. If the past is a clue to the future, development of ground water in the Mud Lake basin will continue and, because the water users have expressed concern about the present stage of development of the water-table aquifer, attempts will be made to utilize the artesian aquifers. In the Market Lake and Henrys Fork areas, ground-water development is being planned and additional developments are being considered. It would be desirable to assess the effects that planned and potential development will have on the ground-water regimen and to provide information for optimum management.

The test drilling has indicated in a general way the hydrologic and geologic conditions in the barrier and upgradient from the barrier area. However, only the upper 1,000 feet of the geologic section has been explored. There are no reliable data on the thickness of the water-bearing formations in the barrier area and only a little is known about the areal extent of the artesian aquifers. Also, the available data are not adequate to describe even generally the water-bearing characteristics of the artesian aquifer nor the effects that pumping in one zone would have on adjacent zones. Thus, more data are needed to define the areal extent and water-producing potential of the artesian aquifers and to evaluate the permeability of the perching beds above the artesian aquifers. Production test wells, deeper exploratory holes, and resistivity geophysical soundings could be used to obtain these data.

A production test well in the artesian aquifer could be drilled almost anywhere in the general area encompassed by a line from Roberts to Camas to Monteview to Roberts. One suggested location would be at the site of well 7N-35E-13aad1, where an observation well was drilled for the present investigation. Pumping the proposed production well for a sufficient period of time would provide information on the effects of deep pumping on the shallower water-table aquifer. The results of this test could then be evaluated for additional deep testing in other parts of the region.

12

Deeper exploratory holes should be drilled in the same general area outlined in the preceding paragraph to determine more about the thickness and character of the aquifers below a depth of 1,000 feet. Deeper exploratory holes would determine the possibility of drilling deeper production wells. To resolve the problem of the areal extent of the artesian aquifers, exploratory holes about 2,000 feet deep should be drilled in the basalt plain that occurs several miles northeast of Mud Lake, principally in Clark and Fremont Counties.

To minimize the number of exploratory holes needed, direct-current resistivity soundings could be used to correlate the major geologic units between widely spaced exploratory wells. However, the only method of determining the yield of any aquifers below the depths explored to date will require deep production wells.

This study revealed anomalous artesian pressures in wells 8N-34E-17ccc3-6 northeast of Monteview. Additional drilling and geophysical studies are needed to explain this condition and the effects of local development on the entire aquifer systems.

The present project study was not structured to answer the above problems.

13

REFERENCES

Barraclough, J. T., Teasdale, W. E., Robertson, J.B., and Jensen, R. G., 1967, Hydrology of the National Reactor Testing Station, Idaho, 1966: U. S. Geol. Survey open-file report Tl D-4500, 95. p.

Crosthwaite, E. G., Mundorff, M. J., and Walker, E. H., 1970, Ground-water aspects of the lower Henrys Fork region, eastern Idaho: U. S. Geol. Survey Water-Supply Paper 1879-C, 22 p., 1 pl., 6 figs.

Malde, H. E., 1971, Geologic investigations of faulting near the National Reactor Testing Station, Idaho, with .E. section on microearthquake studies by A. M. Pitt and J. P. Eaton: U.S. Geol. Survey open-file report, 167 p., 26 figs.

Morris, D. A., Teasdale, W. E., Chase, G. H., Hogenson, G. M., Barraclough, J. T., Shuter, Eugene, Ralston, D. A., and Jensen, R. G., 1964, Hydrology of subsurface waste disposal, National Reactor Testing Station, Idaho: U. S. Geol. Survey open-file report ID0-22046, 97 p., 87 figs.

Mundorff, M. J., Crosthwaite, E.G., and Kilburn, Chabot, 1964, Ground water for irrigation in the Snake River basin in Idaho: U.S. Geol. Survey Water-Supply Paper 1654, 224 p., 6 pis., 54 figs.

Norvitch, R. F., Thomas, C. A., and Madison, R. J., 1969, Artificial recharge to the Snake Plain aquifer in Idaho; an evaluation of potential and effect; Idaho Water Information Bull. 12, 59 p., 14 figs.

Stearns, H. T., Bryan, L. L., and Crandall, Lynn, 1939, Geology and water resources of the Mud Lake region, Idaho, including the Island Park area; U. S. Geol. Survey Water-Supply Paper 818, 125 p., 13 pis., 9 figs.

Stearns, H. T., Crandall, Lynn, and Steward, W. G., 1938, Geology and ground-water resources of the Snake River Plain in southeastern Idaho: U. S. Geol. Survey Water-Supply Paper 774,268 p., 31 pis., 16 figs.

14

APPENDIX

APPENDIX

Well logs and well construction details of the wells constructed by the U.S. Bureau of Reclamation and used in this report are presented in the following pages.

16

TABLE 1

WELL DATA FROM EXPLORATORY AND OBSERVATION WELLS DRILLED FOR THIS STUDY

AND FOR THE LOWER TETON DIVISION, TETON PROJECT, U.S.B.R.

(* - Well drilled or deepened for this study; A, B, C, and D, 3/4- or 1-inch piezometer.)

Piezometer

Interval Number or Open to Depth to

Depth Casing Formation Waterb Well No. (feet) Sizea (feet) (feet)

9N-39E- 4aa1 885 5%-inch 845 885 844.3 9N-40E- 5dd 1 747 5%-inch 705 747 705.4 8N-34E-17ccc3* 1,006.5 6-inch 340 350 40.5

17ccc4* C 460 545 40.9 17ccc5* B 566 888 165.8

17ccc6* A 912 1,006.5 222.4 17ccc7 6-inch 47 48 29.0

8N-40E- 1cad1 376 5Y,-inch 330 376 303.7 21ddd1 450 C 15 80 Dry 21ddd2 B 192 382 136.3

21ddd3 A 423 450 136.6 7N-35E-13aad1* 1,000.7 14-inch 14 515 C3.8

13aad2* C 590 760 c3.4 13aad3* B 792 827 C+1.4 13aad4* A 838 1,000.7 c+1.4

7N-38E-23dba3 632.5 8-inch 181 200 41.6 23dba4 C 313 426 47.7 23dba5 B 451 595 47.1 23dba6 A 613 632.5 47.1

7N-39E- 1ccc1 122 6-inch 84 122 80.7

1ccc2 55 6-inch 19 55 Dry 16acc1 444 8-inch 215 444 59.2 16acc2 107 8-inch 96 107 35.0 16acc3 38 8-inch 28 38 14.0 16acc4 503 22-inch 255.6 503 58.8

34ccb1 26 8-inch 14 26 6.0 34ccb2 342 8-inch 161.5 342 15.8 34ccb3 410 24-inch 156.7 410 15.9

7N-40E-19add 1 394.7 24-inch 198.5 394.7 34.6 19add2 355.0 6-inch 144 355 33.7

17

TABLE 1 (Cont'd.)

WELL DATA FROM EXPLORATORY AND OBSERVATION WELLS DRILLEO FOR THIS STUDY

AND FOR THE LOWER TETON DIVISION, TETON PROJECT, U.S.B.R.

Piezometer

Interval Number or Open to Depth to

Depth Casing Formation Waterb Well No. (feet) Sizea (feet) (feet)

7N-40E-19add3 40.5 8-inch 31.3 40.5 20.9 19add4 20.5 8-inch 10.7 20.5 9.3 20cdc1 399.6 C 63 189 46.0 20cdc2 B 220 356 52.4 20cdc3 A 378 399.6 53.7

6N-36E-11aba1* 1,002.2 10-inch 14 245 70.8 11aba2* C 258 615 35.3 11aba3* B 628 915 35.1 11aba4 * A 925 990 20.2

6N-37E-29aca1 573 16-inch 21 62 43.6

29aca2 12-inch 151 175 47.4 29aca3 10-inch 404 440 38.8 29aca4 6-inch 505 573 38.9

6N-38E-25acb 1 685 24-inch 450.6 685 17.7 25acb2 681 8-inch 483.3 681 19.2

25acb3 243.7 8-inch 236.7 241.7 21.0 25acc4 50 8-inch 43 48 18.9 30bad2 638 6-inch 260 270 90.4 30bad3 B 430 543.5 85.6 30bad4 A 575 638 85.7

6N-39E-10bbb1 636.8 6-inch 168 260 21.7 10bbb2 C 290 317 21.7 10bbb3 B 339 545 21.7 10bbb4 A 570 636.8 19.1 23aac1 25 8-inch 20 25 7.0

23aac2 465 8-inch 257 435 29.7 23aac3 438 24-inch 245 426 30.1

6N-39E-30adc1 699.7 6-inch 263.6 385 5.7 30adc2 B 406 620 7.8 30adc3 A 638 699.7 7.0

5N-33E-13dbc 1* 1,006.5 8-inch 276 290 263.2 300 317

18

TABLE 1 (Cont'd.)

WELL DATA FROM EXPLORATORY AND OBSERVATION WELLS DRILLED FOR THIS STUDY

AND FOR THE LOWER TETON DIVISION, TETON PROJECT, U.S.B.R.

Well No.

5N-33E-13dbc2* 13dbc3*

5N-36E- 2bda1 2bda2

2bda3 5N-39E-18cac1 4N-35E-14aaa 1 * 4N-38E-12bbb1*

12bbb2*

4N-38E-12bbb3* 12bbb4* 12bbb5*

2N-35E- 2bbc1 * 2bbc2*

2bbc3*

Depth (feet)

995

336 1,000 1,026.0

1,302

Number or Casing Sizea

B A

16-inch 12-inch

8-inch 6-inch 6-inch

10-inch D

C B A

10-inch B

A

Piezometer

Interval Open to

Formation (feet)

357 493 540 1,006.5

18 405 838 923

985 995 300 336 430 1,000 190 275 475 490

538 705 726 842 850 1,026 110 800 883 982

1,038 1,147

Depth to Waterb (feet)

261.3 254.3

42.1 +7.3

8.3 1. 1

406.7 25.8 46.5

46.1 47.1

107.8 577.6 577.8

578.0

a Some wells have 3/4-inch and 1-inch diameter piezometers that are designated by letters A, B, C, and D. At other places, three or four wells of various depths have been drilled within a few feet of each other.

b April 1969.

c Water-level measurements on 6-2-70.

19

N) 0

S"i"ET 1 JF 1 C - -LOG OF WELL

PrnJec:t Lower ~ ~~--- Feo•ur~tian Vell (!Wm.bllitated:) Sto1e ,...., Well No 2!{l::/:E-li&al. {V.ll Bj Location !It. S.Ct!ol • T . ' B, 32 I Total Depth ~fitJi Begun Completed rdm: to:a JI,}!$ Dril 1,ng Method

Stot,c: Waler Level &ti. .6 tt. \obovej Meas below "' 9d cfml Grmn4 Dote~

Elevohon (.,-ound) --- WL Meas "' :;66p. 61! (Tc,p o~ e11g. pl.ate

I -------Y,eld Orowdown Other Doto ov-r . ~t.e or 14-bc_. -...,.,_

Sli:

Logged By Geophys,c:ot C.Upc. o-., ud a.-

log Clllmr, l:O'. • B ~ S tu s a s Dr111ed By

:)nll,rtg Dom Oesc,,oT,0<1 Wei, ii 1• 111~ - "' . -· ._ "•-: c-,,,.:: -, •c.,. ~" Pump T~ts of Wei> ~~g ,o;BE"-

Wo•er SOmDles Com~ief an ),ag,~m 1u; 5:,-.

iJrmQd etoc,)r; veil I :)2 1J!. (t) !.!). • r1 =--·-=··--'---reiabtlltated j eeg. + 1.5 to I ~ ' ,

1 n~,m•• IIDder Sped. lOOC~ uziknQlln depth ti,~

9]1i(S7) l,n Auguat.1 prol:abl.Y nc,t. a:-! ' 1967. C"!ltn.et eeedtng 10 tt. ! i vor1c e~1•t.ec1 ot ! I

' ~veil i . ' ~ ..s pllllp, I

I '

' ' :!:1:um,,1 ri!_~ i I ' h--\--870 n. . a!ld lldd.ll:IIJ\ ' ,ooi I \ '

' -ill4!; cap. can~ tz.etar - C-.i i \lj_' : I, i Drill~ Co.

. =~-,1__ 1t· ,~· ' ;plug

~11 n • a

' ; . ' .

~00: ' ' : ' '

Kl. •R.P. - ~.J ' ..: ·,.

' ' \ cl:11Mled' m• '°"" ~e. step 12 tt. i

~ Im. of 1"011. s:i..'tlmti by iu.s.11.11. - 1961 1T 6oot I ; '

. J

,oo: ' I ~,-1,_

I I

' I • L '

i ''U .. '

I i : I"'' I I

l~1M, '

'+U . f-- ""'., -:---1 -- I~~ ---I 11otu. at 5! 1n

1

' --- _ _ ) , 'Total Di,pth . 88" .6 I (1) bol• , 1 : lfote: L1tholO(!iC log (cl.&1Hl1'1<:at1or,) baaed on

t I i ; i I lnterpret.atlon o1' geopb,y• leal lOf!•.

I '

' ' S.:i.MPLE fYPC: == = = S'? e Core

CT a ~urt,"gs D o-.11ers Log c:-· ,-~ = ~

WELL NO 9w/39E 4-1 khAS.PEll 8

8'JREAU :::,F Rfi.·'_A~,HiON - REGION

LOG OF WELL Pr~iect w.·cl' "';'c~on ~{~-- ____ ~ec:·J'~ Cbaer,atlon Well_ (i11,!>&_~:,:::.:4te<1.·~----·---- __ S•,::t"~---

Well Ne ~<ll {llell c' _.;,c-:•.~r SE,t, ~~im <, 1'. 9 N .• R. 40 E.

Y,ei(! ____ ---~·:w~ w~---- - Call-;;~~r ~;-~~_:~-~! .. -~~--- ---·--------

~':':'~':'~'___-:'~'=========="-~'~'~'~':s':':'~' --~';';..a.-....lll'. N RT S 'U,5.G.S '.)n:led 8y_:==========-j .. -~! ·------~t~jj~ "'~~==-~~~,=-·-== -~=

~

I '-'--'53'-4' seled on "o~T "one . ..

e-n.ttorua by s.s.a. - 1961"

-- 1"4 7 .6 ----: -Bottoo or ':'! Ln. (~) hole

PROJECT I....,... Tnoo n1v1,•on

-~~- -, rh: -, r:;:.;;.:;:';:.,::=T "'" ·-- ,.,,.,,.,,

1o4i ·, \ ·~~

.'.J_l ~

a» '

~

1"!~

-~

~ 400

~ 500 '. I

--:-+J :;±-

. ' -~

'700, ' : ' ;---.,,,,~

'--: · ..

'l'ot,&l ~h - 74!.6

Nate, Lithologk log (Cl&a•trtce.tlon) bued ,:,n

lnt=-pn,tatloo of' ~ tc&l 111£6.

WELL NO 9N 140&~ddl feha.b.W,;ll C

BLJR[AU OF R[Q..AWATIOH • 111£6f0ff I SHEET l OF Z

LOG OF WELL Pto,ec:t 1-t ~ ntnai­ P"IO'turt ~l.<>n~c,, D1:Ul Bob (Jllnl.t-1- tr-) S1at1 Jdaho

App,;o:11. 210 -rth, SJS wt of Hctioi c,u:nar -==---Wtll No •/M - 11 cccJ (Sire JZ) L.ocat1on:NS11 5fc.tlc• 17, Ta•, 1uu J•rf•....,,. eo.-e-, Toh:11 Depth_,J904 .. ,5._ ____ ... ,• lf6{H Compl1tld ll/17(69

Csl>l• 'fbol tD W<!' Drilltnq Me!hodD1,_d Cece rn 1006,

Static wa,.,. t.a .... r, _ _._.._,.,..,.,.._ _____ !~!f;!) Meas. Pt-~',"~"'=-~---------''"'----El..,otion (,;round} Y92 64 W. L MHS Pt-~~---•

"yie1d_~~----°'"""---~~-...,n=..,-~~: ~1m~1:~~~~~!:r pd '19<>1o~1;!·Jmrn; i Puiiip Co. Laooed By C La; mndncrlY1tJ ,_ Dn111d By 11!4 J..-Uc• Cor• DrtlllM

Qnll.nq clato Pi,,rc, Testt

lll<r.H Somoln

a..... •rill to sat': w:lf'ltl..1-'1.-.4 can to

1006 • .5' --t S~. lOOC-1060

r.., of •· c ... t.. uu.01

n""*"" W U/lJ/69

... 11-. 0.-t.li -

.i. 4812.ll 223.90 a UU.91 110.10 C 4W.07 4'.00 D" er ..... >

uu.o, '6.10

Onc<•Dl­of Y"ell

Comi>le••ol'I

PlpM an, blAck iro.. .5' •f parforar.1-t:r..,._.. 2-112• .._ bo,;ea.of ... a _,1,-.

.,. hrlor-.i- b ,- .....

,... ,,..

,.. ~. II ,,. (I ' la" bol•

..... •• U,'

I ....... 1

,:. I

-MO!" ----

~a.u c::::I Stu

PROJECT ._ :Dtr,- Mrht:r

~ .G • ~

: "'. ·: ~--f­

"' '

12-3.5 CLAY, b~. )5-76 SAJlll -" GU.VU. eubmigular to _.,rouadad,

, ... doed.iu.t.elr rl,yolit•.

76-IIO CLAY, r.ti--e-. aabJ, d.ul.r.tearatu 1r. -tu·.

80-85 s.um, co.an,. with t1- ar,-1. 8.5-&9 Al ab<>- ri cl> ,.11 ....... u.. aebJ c1., • 90-Ul CLAY, t.m, ullJ, alley to """1 witll

arsnllr -·

Ul-16.5 a.u. &raJ', aelrJ, aliptl.J' e-.ty.

U.5-201 UJID. -41- to e<>•i:.e, •..i.rctlmd.ed, cl"J'•J', pn<kted.Mtdy rhy<>Ur• alld q...uu, traca ~tic &rain.I.

ll0-263 a.u, arar: 1-foot - ..,_ •-d, ti- an-1 at ~·.

263-290 U.S.U.T, arlJ', _...,. fine ar&1oed, en.,. t,1-,..- .....U•, u-i, ••utcuJAr; -1c1 ... -r b- filled ritb reU.......~ cl-,.

280-290 llj.T, Y•ll--s:r-. eUtr to e&Gdy, •laku 1a •et.ff.

290-29.5 S.U:O, =•~. to ft.. a~ ot rb_yollre, q,aaru, obeid.i-, •ub......i..r t<> •abro....ted.

29.5-)ll CLAY, c- ritll chua ....... tine to coerse ...... 3"-l40 Cl.A,T, r.a riUl traca a.ad s,:a1 .... 340-lll S£m, coa~ .ttll f1- sr•-1 of •ab-pl.er

rtryoltte, •-n:•, trac. i. ... a1r. 351-.,.5 CU!', tt•J' to u.. •ilty.

=- 1±53"""' e:zJ QA.ff&. c:::::J ..

WELL NO. lll~I - IZ tee..

8UJt£AU OF RECt.AMATION • JIIE.GION 1 SHEET ~ OF ..

LOG OF WELL Project rmec TetDP Tt!:rldrn:r; Fenhlre trn};t:~1;~?2~1!.,,fil: !!J'¥t::.!~b., CbEBEtStON,~la-"''---• Well No llll/'.l4E - 17 cccJ (Sit• U) locafior,SWS\I 5<!<:ti<>II 17 ttN VU .Jdfe.--e C..--ty

Cebla Tool m ~ Totol Depth _ _,wo.,,,,,.,, ____ Begun 8{6/69 Completed 11/17/'9 Drilling Method meemd lion te 1006 '1i

Stat,c Watr L8¥el. ___ , ___ ,,._, _______ 1°"w\ Meas. Pt __ _,•=-c.c""c'c-=---------'°""---­belo111 Elevation {IJ'a•mdl ~IIQ9.64 W. L. Meos. Pl------

On11<ng O<:lto P.~mp Tnh

W<l!..- Samolu

SAMPLE ""'' ~·Coo-• %T• C..tt•no-Oroll•s

PROJECT

= ,,,,, ~ = SW'

1.-1 ::r.,. Il;b:.l•l1111

: ,~~'. I

·~ij__· f:_i_-:1; i -~· ...__.__

Clon,1,ocrt,o~ and Ph,..col (;,:,n,:hl,on

" D 49.5-S40 SIJlD, coarae riUI n .. ara...i, ,...__Ill.at to•®~ n.,.>liu, ci-n.., ......u.-, u .... b ... .tr.

S40-S66.4 ~&LT. sn,y, ,,_,,.._ l'1a. falMpar r---- --41-; -.ieratelJ. 11-1.J -icalar; ~ jDlau

a et 548, 545.S'; broka> .565.9-Sff.l.

.

566.4-sn.o a.AT, t• to brldr. nw, •Uc,,. l>Malr fr_..u l>e1ow .570.0.

.511.o-6.06.8 9.i.SALT. ,r;r-,, -,.t --U• -1cu1er to 57.5 • .5, ~ to sn.1, ....,. -:lcola to -'!l.2, 4- to fS.-1:, _i.etlb., to 600.lo beaded. bz,c,,.._ to 601 • .5; euttft'N.,... rid, uollte cr:,mut. to 606.a.

'°6.~.5,.l USALT, -. (1- fel.,lmpar ...0-.-liu ~al• t. - -1~. -1-..1 cllJ-filled jol.r.t; red-ara:,, ~icaln to Pl.4; bl'uwn, .,.c1,.,ere1r -1cu1.ar to 621.B; red-sraJ, diahtly alurad to 6]2.2'; IP"IIJ' co EH b> 641.J; ar.er:i-aray, c1ea-, to 6.59.&'.

6S9.~l • .5 ASB, &r&l' to ....s-t.-, •iltJ to .-.Ir, ocCUEios:Lal t...alc fraa-r to r.

663 • .5-7'9.0 M.SALT, b--are, -1<;ol.ar to '67.&; .tc.enu,Uq sr•r-sr- to b.,_, ..... to ftrJ -eicul.ar to 690.l, feldsp,,ar MMtieel co l/4,., 6.152.6-fi90.l; brick red, -ic:a.l.ar tD 192.~ tridll -..uu cc,,etal•; b-lD&td sr-.n, to lo- ridl occamioD&l red -. ~ to ~ to JM..l; Sl'IIJ', b"*-o to 799.0.

7".0-152.5.0 SMD lrl.tb CLA.'I, ua, ,-ttlJ' eilt:J, Ura, eli&ht.11 calca...,_, t-l4:1-a llort-C&l.

82.5.o-t;l.5.4 CU.T, ua, f1ra. 111st,t11 c.elc:s;...,_. 81'-4-886.0 VilVED aAI, boruoaul baDded 1/16-

1/4• ~ of brtp,; &"- pbftic c1ay ~ to ligtrt sray aUt, -rv1.na .,n cn,d,e, _... ·-·

686.0-,0,.) CU.1', c:rod.el.J -n.d. 1-1/2:t .. i.,,,.n ~ Cl.sJ' rith di,:htlJ -tort.I ~1-of P'*1' .u.-c. dip o-s•.

909.l-91,.o SILT, arlJ', t.diel:ieod; i...tdiA&, ,.._ urb=aceo- -terl&l, fn.a-.tl DI .....it c. 1-1/r Mt- 914.8.

916.0-1006 • .5 U.SALT, sn,y to r,4-1,-, u·- rd 11- lald,,par -..i-, -ictll.ar to 9:;).4,; .._. to '64.7; -icular to !184,0; .._. to 1006 • .5,,, P-"J' colo.........,. ~ "9.f.

1006.S 1Ur£ DO'!B

,.., = """' = """" c::J __ ..

WELL NO. a,au u ""

SHEET 1 OF l.

LOG OF WELL ProJect 1- Teton _Ol: .. 1•1an ____ Feat.,,e Ohfenatl!F Wall /hbebP!ta~

Apprm:. 2000 tt. lut amt tt .... rth ot Well No 8N(\OE-1 c:al. (Ret.b. ilell A) Locot,on SW Cnmcr 5edlm J T RI e l,.Q I

Stote _,...,~---

Total Deplh _ _,,._,,,__ ____ Begun _____ Completed Mar to J.921 C>rtllrng Melhod _______ _

Stot,c Woler Level lobovel Meas Pt o,-a,-,1•<1>M""l-"'='""'"-·c~~-----Oote~ below - p:n Tap ot ,• Elevation {~ound) ~161.o W L Meas PT '>161.65 { COlq,11.Dg

Y,eld _______ Drawdown i,;:.: :.s~~ ... ~ ..... ~ ... ~~""''"''-"IO,,..,-o._,st••~,~'."~,·•. ~~"""1:oi,~,.c,c,.=-~-Logged By _______ Geophys,col Log ~ by If RT s Ins G 5 Drilled 8yby r:eeer, :O,.lJJ!oi eo

:,,,11,ng :::m~ ~~mp Tes•s

.~·o·er s~m~•e,

:e,cr,,•,on ~ f ll'el,

Comale"cn

th:n,a.:t ,toetr.-u,s,-~ I.D. "'II'.· 1"8ba.1:11.lltated I•.) to unkntiOln ur>4er Sp,,c• .lOOC-1 d-.i. but prob- j

93"-(SP) 1n Aagust_•bly oat e:o:c...d- 'I

1967. Contract . t.ng 20 :rt. VOH ca.irt.ed ot'j n.ffiJlg bridge 1.~ (10' Jollltm) ~ surf"ace, ·coupled mteel cl.-1.Dg, deepen- :ptpe ..0.65 to tq; ty,,. 355 :rt. '60.o(-) &ad lldd.irrg cedng , cap. Contractor - !

c- Drilling Co.

4~ Coupling v/e4p

"' f' 0.65 ·i! _,__..;I

O.G. J .

~-, .. .I •

r~- • ii --i Ii I I, I

ii .1l 11 '

II. ,. "''"

St."1P:...£ TY-'E C's C CN• C:T, Cu,1,ngs D Drdlers L.aQ

PROJECT taoMrr 'l\rtan ni:rti!lioa

= =

11<::,w: Litb.ol.ogtc lo@; (cl.u•ittcaticn) baNd en ~ttan rA ~icml l.Qp.

= = WELL NO 61'W-l ml

!Wab. 1'feil A

i

24

DO

-~i~ __ _,j

.~ .. =~~~-.~, --------1~0

0 z -' -' w ;o

8UREAU OF RECLAMATION l'IEGION I SHEET 1 OF 2

LOG OF WELL Pro.,ect ! oor Teton Dbhfon

Faature Exr1~~~7 ~M1 1 s:!:iz. (:;;r:!t:Slec. corner) Slate_,...._ __ _ Location SF NE NF Sec l1 IZN R35E Jeffer:son Crnmtr Well No. 7N[35E-13u.l (Site 13)

Total Oepth __ 10

00=00.7 _____ Begun 9/1/69 Drilling Method

cable tool to 501' dhmnd core to )GOO

Static Water Leve1 __ ..,seoou,,.0J•9'"-----tg~~!J Mels Pt._--------------°'"------Elevation (17aund) 4269 5Q W. L. Meas. Pt. _______ ( Yield, __ ...c·c· ____ Dro•down, __ ...c··~---Other Dato,_aD'c'o's''e',,"Ic'e'""=•"'•'••c'e'c'c°'":e''"'"'"''c'""~"Pe'c't",~=cc-7 Cope Drilling and Pump Co. logged By & I Haskett C.Ophysical Log G,unma. Drilled By J115!1ce Core OdJJing Co

Dnlhn9 Dma Pump T8"h

Water Sam, tu

Under Specs. No. 1 O(X> H)60

Cable tool to 501' w1relfne d1a..nd dril 1 con, 501-1000.7'.

P, top 14" csg. 791.67

Elev. ~. ton of ni

IA{3t4"l 4790.64 8{3/4") 4790.72 C(3/4") 4790.81 "0"{1 ") 4791.07

Depth to iqiter ho/22/69

~

,. 0.39' o.5g• 1.35 0.92

Descr,pt!QI of Well

Com let,on

Top gravel, l'

P1ezo. plpes--

4" csgl:: . 14' .II: •

5' of perfontlojis starting Zls' above bottom of ,,,.

~

(for water level 1n upper hole)

•• holo

I.

325' Ii. perl's. -t-------

Top 14" csg. _ 1--

4791.67 14" cs~.

SAMPLE TYPE: CR ~c.:n gT~fttn,: ·-

.. ff-:.-.---J CLAY

c::J SAND

bru

'"

= = PROJECT Lower Teton Division - Teton Bas~n Project

D 0-7 SANO, brown 7-16 CLAY, brown

16-35 SASAl.T, black, broken, cinders at base 35-51 SAND, brown, fine 51-60 CLAY and SAND, brown 60-69 CLAY, brown, with grave)

69-107 BASAl T. gray

107-111 CINOfRS, black

111-141 BASALT, gray

141-165 BASALT, green-gray, hard

165-195 a..AY, gray to brown

195-199 SAHD, brown 199-240 a..AY, gray, blue, brown, with sand

240-279 BASALT, gray

279-284 BASALT. red-gray, broken

284-310 BASA!. T. gray

310-314 SASAl T, red-gray, fractured 314-330 SASALT, gray, badly fractured 318-326;

{lost drilling mud, 320-326)

~~~=~!: ~:tf: ::::;~-i~:~iu;:: ~~~e green clay, 338-344.

66-375 BASALT, gray, very hard 75-380 BASALT, broken, with cinders and green clay 80-422 BASALT, gray, hard; fractured 416-422

1422-436 BAS.ALT, gray, soft, porous

36-500. 9 BA3Al..T, gray to green-gray; broken 470-484; broken zones, 484-500.9

GRAVEL

BASALT SITE 13

'6li.LL ttO. 7N{J5f Pael

8UREAU OF RECLAMATION - REGION 1 SHEET 2 OF 2

LOG OF WELL Proiect Lower Teton Dlvhlon Fet:1ture Ex !orator Orlll Ible Piezometers

GOle Fu,, Area

State Idaho prox. sou , WP$t, $PC. comer

Well No 7Nf35E-13ul (Stte 13) Location SF NE NE Sec Jl IZN R35f ,lefftCiAD County tible tool to SOI' Total Oepth __ ,10,00"-"''-----Begun 9/l/69 Completed 10/4/69 Orillim;i Method rlhPWrl rnrc to 1000

Static Woter Level ____ =. ______ !'above I Meas. Pt .. -----=--------- Dai, __ ._. __ below -Elevation (ground) 478g.5o W. L. Meas. Pt _____ _

Yield, ___ ~ ___ Drowdown __ ~ ____ Other Ooto__JO--e:,_lluls•L•,wlIB"SPSKCtoa_<'•·''''''-'""~eo~l~:.~9'~:~:r1r~j~r.:~;'~:ru1ar•e,a,.;;-;t,1a. Logged By G. I. Haskett Gec:iphysiCiJI Log G;;imm;i. Drilled By ,Ju::;tjcl! Core Ori)Jlng CO,

Droll,nQ Data Pump Te,h

Water les

SAMPLE TYPE: CR, Con. CT, Cut11ngs D Dr.liars

Descropl!QI of Well

Como

515' Grout

592' Gravel

640 • G. per-h .

~! 760' Grout 7g4• jiravel 812' It. perf$.

P[EZOMETER ~

827' Grout 840' Gravel 865' G.. perfs •

••• D,aorom

.,

" hol•

!=-=-'·-"'--'-,'l ClAY f..:--:-:j SILT

··1:

PROJECT Lgwer Teton Diyhjpn - Teton Basin Project

C1an,t,ca1,o,, an<! Ph,s,co( Cond,1,cn

CR 500.9-512.6 BASALT. ined. gray, .oderately vesia.ilar, -rou$ fine feldspar crysta.h.

512.6-515.5 BASALT, red-gray, vesiC11lar; 2()0.Jofnt filled with clay at 515.0'.

515.5-590.0 BASALT, gray to green-gril)", irregular color zoning, dense with occasion11l stream of wsicles, n.....erous fine feld$par needles, glassy at base.

D 590.0-644.0 SAND, with sticky clay

644.0-711.0 CLAY, gray

711.0-791.6 o.AY, gray to gray-tan, finely silty, crumbl!J: .wisshe to faintly bedded, di, J.~u. 785.1-787.0 clay h brownish, contains car·bon11ceous trash and WOMIIY pattern of plastic gnen clay inclusiims. (glacial rock flour?

BASALT, gr1y to red-gray, with scorfateous ZOl'IP$, p,ahgonite fflHng, flew banding of lt-4" znnfl> blue-gra,y basalt below 804.1.

803.9-804.1 SAND, red, silty 816.8-817 .0 CLAY, tan

820.0-827.0 SAMO

827,0-871.7 BASALT, gray to red-gray, dense to .:iderately vfl>fcular, occasional Joint some calcite huled, others cla,y filled.

SAND, red-bf'own, dirty, silty w1th basalt fn']liltnts to;.•.

872,0-941.2 BASAl.T, gray, n-rous fine ftldsp,1,r n~les, bec0111es coarser-sug.try 1n center, vesicular to 881.5, den$e to 928.0, soderately vesicular to 941.Z; broken 872-890, 909-910.6.

941.Z-997.0 IIASALT, red-gray to 953.4, gray below; ..-e$1cular to 945.5, den$t with zones mderately ¥1!$fcuhr te 997 .O; -rou fin!! feldspar l'loffdles; calcite er yellow clay 1n occaslonal joints, zeel1te crystals in Yugs, 945.5-953.4; base of flow 1s chilled, glassy.

997 .0-1000.7 BASALT, red-brown to red-gray, 111.e feldspar l'ttdles, ves1ruhr to ~f:;:t~J{y~eslcular, 5- filled with

~ VESIQlLAR BASALT = SITE 13

WELL NO. 1N£35f-13a&J

BUREAU OF RECLAMATION • REGION 1 SHEET 1 OF 2

LOG OF WELL ?xploi:,tory Kol• • P1••-ter B•nk Stole Idaho

,\pproa. 1,440 ft. W••t lffld 730 ft. South of •Ii CorM-",~--­Wei! No.zttOAl!:·ZldfJ (Utt 41

Feature

Locotion __ ,.r=tt"®..CZCl<.eT~Ll,1-..,•~•••~1._a,~•---~vc,.c,sic,uc--aa,c,r=;;acr-Total Depth §32 :f fl; Begun 6/l'J/&7 Completed 6/l6/67 Drilling Method l:fft4tlll 6: chnrn

Static Water Level 40 U. (11nud) !g~fo!l Meas. Pt Q[iglul ar.....i. Dote_!fil_ Elevolian (17ound) 411,9.9 W. L. Meas. Pt ::: ~:!i:ilc L. book, drlll•r'• ~~-~tr.ua,. ... ,,,~..-,,,-Yield __ Drowdown .Other Doto tlPOth •« uOPbuical

C-&G-·C-logged By It, a- Geophysical Log hJ: N B T & /n a G I Drilled By ,Jv,Hca Cote PJPHns Co,

0,<11,nq Dalo Oescrop!,oo .. 1; c.X ""'"P rests of Woll ,S •li: ~? Closs,f,ca11on and Phys,col Cood,t,oo

~0 '',·:,·~''e"\eats.~°',·~'','il'"•"T".laaajF'aaij'!'!!¥'+--F~"iFinF.'rr.c<""--------~~~~9 Ch11rii iint hol• n."r,, - :J,~ 1.R II ,.~ - fl,, •.IMID ~--

to 201.S. l,l. fl•-tff 6.S • 36.0 • WALT itrUld 19Se. plpe1 t,,.tdllld Spece. 100C·:JZ9 ln lb< hCll1 •ad Ob•, will ua n:htlng l!I" nll M........i drill lln1dOM: !tr. vtl.'IU- Top of 1\-1' Cotld holl C(!Upllq • ZOl.S to 632.S 4860.32 Speu. lOOC-'20 Top of PlP•

W•t1r-,urf1c• ,tn•ttoa, I/U/61 l!I" c.,. 4119.64 Pl,,., A 4816.06

I 48U.9l C 48U.st

Wat1r •-.1• tU•o fro. lldj11ent nll 2ldbl - 6/22/61 pH • 7.68 6 &.(:. 14h10 BAil • 0.61

I" C1f.

fl.110 A - 4860,l lt U60.4 C 4860.6

llP la cot1cr1t1 -48'6.ll.9

10" llol1 181 S" C1a.

Tftml), 4" C1g. 201.s e" Rat,

230 Gr<>ut

lll Crout

326 -hrforetioa

Pi1.....,.t•r C

L ~ t 39s.o ,...,. -.

SAMPLE TYPE CR , Cora era Cutt,ngs 0 Orol lars l_og

c.,. 426 er .... 1

4st cr .... c t hrfor1U0111

470 Pl1-t1r I

:;· lt

'

',, [ •' f y.~·,

; ,,: l .. ,. ... }•.',

':'"'. ··1ol.), ' 1, ,,, . . ,). )·

,. ·, .. 1

PROJECT Lwar TltPD llivhton - T@t® Ba8in Pr<>Ja<'t

= =

36.0 • S0.0 • IAIID

so.o • 11,.0 - 8AllO 1M cu.vu..

n,.o - 190.0 - WALT

190.0 • 195.0 - SAJID Uld QIU.Vil. (f); 1llty. 19S.O • ZOl.S - WALT, CUIDKI.II, GaAV&L. 201., • 632.S • WALT; sre:,, b-, purpl1, lltd red. ,,p;,anitic to porphyritic. M&l,l.,. to highly Jolntld 11><1 bnccl&ud. DID1<11 to highly "llculer ind 1code,::1ou1. Gln.r,lly oU'li--b•utu. Fr11h to d1compc,Hd

kodec10U1, ciad1ry, 1nd hlahlp ft1ic11ler •-• 1hi,o,n by '"rtlcd ti.ck• on loa,

SILT

..wLT = =

WELL NO. Zlf/381l·23dbl (SU• 4)

BUREAU OF RECLAMATION - REGION I SHEET 2 OF 2

LOG OF WELL

Total Depth, -"'"'"'-'SLl!L• ~---Be;un 1/JOIU Completed

Slatic Water levei, _ _,.,,._,,.C•'--"{H.,,,•e•e•e•,•---!g~f~!l Me(ls_ Pt

Elevation (oround} 4a,,., W. L. Meas. Pt. :: ;9.!711

u(loa ltooii., drill•r',IW iilPRtfi 1

Yield Drowdown Olher Data report,, md pophYl1c&l lot:• ~•c.--c-

Loooed By •· ._ G!:taphysical Loo J,y • • T rt ru s A I Drilled By 1n,t1,1 con Dr011as re

DrollillQ Ooto Pu!lll Tnt,

Water Somo In

Oestripl,oo of Well

Comrlat,on

'" 0r ... 1_ 6U ar«at

r;_ hrfor,tloa,j 6:U ff•~.!•.!.~

t--------- - -- ~~t!!'_ •!"_~_Bol

SAMPLE TYPE: CH= Can, CT= Cutfo",15 D Orollers L<>q

Well f o,aoram ~

-

-

-

-

,.,

= = PROJECT 1-er htOtl Dt:rldoa • Tetn a.eta l'Toj1ct

Clon,f,~ohon ond Phys,,:c;,I Cond1t,on

1'ot&l deptti - 6ll.S tt.

ULT ...... , = =

--···-----

WELL NO. 1W/l8-23fb] (Ute 4)

BUl'IEAU OF RECLAMATION - REGION 1 SHEET l OF

LOG OF WELL Project~•to_11 Dt_viai~,--- Feot1.1re <l>Hnatloa V'1h Stcrte ld.aho

1/]9 le l (V 11 .&.} .Appt'oa. 600 ft. laat wl 141 (ll'•ii .&.) ud Ul (V•li I) Well No.~ cw:11 I) Sit• ' Locotion rt IPrth pf IW\ CPS:Mr ucuon l I z I I lt I I N

Tota! Depth V•ll ! · 1!~ ~~· Begun 6129/fil Completed ztVU Dri1Hni;i Method Mr rpgflT

Sto!1c Waler Level Wdl A· n.s ft. !g~f~!J Meos. Pt Ol'ldul .,...., Date___ll!Z_

Efevolion (IJ"ound) W. L Meas. Pt. 111 bwl«

Yield _______ Drawdown Other Dato ... d.dll•r'1 ad luf""'tor'a HfO!t•

Logged By Drlll•r Ge'-,-,-.,-,-,,-,-,-L-,-,-- Drilled By 'i"':,n:1"!;!.,,111..!;:;11,1

co

Onlhn~ Oo!o Oescroi,hon Well -Pump Tests or Well

1 _D,ogro_m

4 !:

F"cw.,,."-",m-•",'ea:c"c'c'•m•p '·"~'",""""~ DrUlll<I \111.d.nr f'ud4lll<I a..rhcn .,. .... 100c-na ,,.i

Vnt•r-nrr..,. d•••tlou

l/~1/61

Vnll A• 4131.9 I - 487'.l

l9 61' t.D. C11.

SS 8" 11.oln

6" I.D, C•I• 84.} w/ahoe

12:l _ ___!_".__!i•l• _ .,

F

Z!ii.!1!"'1'o, of c.,. ~ 49°'.86

V•ll I • :op at c,,. - 4905.41

' I

J

SAMPLE TYPE· CR , Core CT• Cul!mgs D Drill.r1 Loo

= ..... L=-...:--.j cw

((

-i'.f,

~-J - .IL

"'

-

-

-

•

-~-

Ciossif,cot,on ond Ph~s,co! Cond,lton

0.0 • 16.0 • TOftlOIL and UlfD •

16,0 • S,.O - I.UALT ud ClllDIUJ rll<I ...S P'-,.. - -

,,-.o• - ,11.0• - Ct.u1 aoft. ----- -·- -

615.0' - 122.0' - IUAJ.t ud ctD1U1 ... .,..

·-------

Ctl!IHr -• •'- by Mrtlcd tick• Oil lot,

= = WELL NO. ZlllM~Jssl • (lit1 S)

"' 00

BUREAU OF RECLAMATION - REGION 1 SHEET l OF l

LOG OF WELL Projeci 1,c;,Qr T•ton D11'1a1m feature 'hit Well State Idaho -=-.c,.,.c=cmc.c. ,,-,,,,~,.~. "N"orl=hc.,,.=~,oo~•tt•.~,.c.s,coCtn-u<=,., Ht- Corne:r S.ctlon.~, Well No JN/40l:-l9a4]. (hat Vall 2) Locot1on..:,T,.a1Le•s··~<"c· o4ceo.2•e-.<-"•s-,•,·-----------------Totol Depth 391i.7 Begun 5/9/f:R, Completed B/2/68 Drilling Method C&ble tool

Static Water Level_J.Ql.OBJi..,ttL. ______ !g~f~!\ Meas Pt Tap of oulng, S, .tile Dote~

Elevation (9'ound) 48 7,0 W. L Meas Pt 4858.01 ( }=~~===• s., driller•• &n4 toapoctOl'' • report• and pologie

Yield See 'below Drowdown SN belCN' Other Dola...J:a"-J.<><"-----------c=-c--c-==c---~

Drilled By !t\Si~A' g:iton Logged By Geophysical log ___ _

'fnnlll1Hibilit7 -,l..611o3t1 2.1 :1 1o3 tt. I (1.7 to 2,9 :I 10 lll}IJ./tt.) Coett1oient or atoraa• - 101

tban 1,0 I 10·5

SAMPLE TYPE CF,, Core er, Cut!1n9s D Or, I lers Log

21,. ln, O,D,,500 lo, -i1 CIiio

.2 to 160, c-t gr,o.rt l54-16o, r.ct ahoot at 160,

~·--160-2] 1n. bol• l6o to 196.5 20 b1. O.b.,. -u lWU' 145

·'° ·r..i~, ~ 1u:rtllce d•t&lh If'"l'ii7"i1p1

2li ln,01g,

I I I I I I I I I I I I I I I I I

llatt~r119 111 ----- L~

hol•,

CL\Y

""" PROJECT 1-er Teton Di.Thiem

Ciass,f,cot,on mid i't,1, ... ol Cond,1,on

51 t J ,2 SA1ID AND ORAVEL, 11111.l&r to th&t at 0-42,

52 to 142 BASALT, gn.y, brovn, Nddhb, aplwl­l.ttt, den•• to blgbly v•dcullr, olivin1 - bM.J". :.ng. Ilr'lll•r nport, sand 120-123

142 to l.53 Sll/l'"f BAlm, r.dU1b brown, tin• to ooa1·•• gra~, p:rtncti-!ly 1ubroundff to 1ub­e.ngu.J.ar ~• Uld. 1Ulcio YOlc&tllo rocks

1.53 to 194 MB4LT, 1hd.l.v to 52 to l,42, "nlf.n 1on1 rd SILTY SAND nev 175-lBo

19'• to 197 SILTY SAlm, nddlah-bN>vn, tUl.1-a:r111nff, p:ri.nclpall,y qmrt&,

197 to 2)6 JIA.6"LT, grey, llthy Tith t-.. pheno­ory1ta a;ra.dl..og to apban1tla, de:11.11 to 1oor1a.c oli Yin<I• b.-.::r'J..ng

2]6 to 2111 SI.NDY SILT, ndd11h-br<.1Wll, :rtrie ot CO&rll gr&lbfd quart& and bl.aalt &&Ad, tl-l"OUI tnLF-nt• ot bualt and &lt1:rat1<m -t•rtal.

1¥':"~=iR=t-- 211-:. to 302 11,l.s,.ur, ,:ray, 1pha:,ttlo, 4e111• to ~ioW&I' ollvl.111-bMrt~!• _

= =

302 to ]07 8AR"DY SILT, darlt bNWD., tin• grained qlll&.Ttr; and bual.t Hnd, nl91TOUS bualt l'r&a­Mnte and &lt•r.tton n1;terial.

307 to ]91l.7 BASA.LT, gray, nddhh, aplanitic, deaa.e to 1oor1&oeou, ol.iYLDe-"-8.rt.ng, aiuah &l.­t11r1oticm. -t..er1&1 at 39'i

WELL NO 71f/40J:-19!,dl (hilt Well~

SHEET l OF l

LOG OF WELL Proiect 1-- Tifton D1:rl•1C1D Feature Obllenw.tion W.U. at 'hi•t Wall Sita 2 State Iddlo

Well No ~!f:'-1.•Ji t 5( Location Df'ap to~ f.)~R~2f 1'i'.N'!"t of ta J. f C-

Totol Oepth_,!t:,-.l6;;5~-1,_

0 ____ Begun 3/28/68 Completed 5{1/fB Drilling Method O..bh tool .... - •/

Static Water Level S,, W-?r jg~?6:l Meas Pt_,-,._,..._,.,,,_ __________ Do,, ___ _

Elevation ('7ound) Anna lt856,1 W. L Meas Pt-"-="'"'~"~--( ) _____ _ Yield IW uwww }lJjwdown, _______ Other Doto __________ '""-"""':.-,.,-•• _.::....,=----logged By of 'l'fft -..U 2 Geophysicol Log Drilled By r-,J]'ng c,,

D<1il>rig Data Descnpfloo Well Pump Tests of We• 1 Water Samples Complet,on , ..... ')i,;. '"

SA~PLE TYPE· CR: Core

gr: 5'::n::: ' --PROJECT

I w.u .. a 111-::-:ffl -11. •••• 0.9 to 31.3

4 ln. ··- -­.-bl,Y .29,0 to i.o.5. IJ,2 el.at -=- 33.5to ~:=--= .,, .... 11.0 .o.-"856.i.. !l., 1:0II of 0&1.-11851 .29, •••• 1. T/ri/"8, 13.12 '"'· .... ,.,,1 ~1- - 29.4 ft

..,, .. 10 1i':"1ia1i O to 1.02, 10 ia. ta.p cq.Otolt-1 (0-18.8 ....ia­t.nc), a 111. m Cl ...... 0.1 to lOT, 8 Ut. bolA 102 to 3'5, 6 lD

~: ~ii5Ct

'°""' m.. 0.0 • ....a,6.3 11.. top ot 6 ln. aq. - 11151 .1 T, •••-1. T/µ/EP,, 18.82 (11 • .aee., ) lMi• - ,i.o tt

.

r: I

' 0

@ I

- -

,-,._

~

p; ~ ·"' --~ -= -~

·:J--~

;c.,.· ,!_

6-b -

"' I I

i

3", 3= _,_ I I '-.-F!~+--11-

-

a.tar to las of Wall T!l/i.cs-191141 (TNt W.U 2) tor appruclate ci-.ifimtlaa and Jto'•loal oaaditlaa. Ozw.:pil.le lOC at htt tat. f'r.m V.U 711/391.19&41.

WELL Nr ·;;

t• •:ns1 if W Wtlitt ·oN 113M aar ..... •1"1: ~•r--saa,pop..,14r,--.~il..-,,.._..,.,-103rood

·•1 - ~n 1•:111- '°I..,. ·­n1•:111• .... '1 ..... ,- ·~1:11 ·--po29 1,ncw:

...... ,., A"1•1•J1..- 01 "•"''" .. ·-µo- '<- 1) -·-·, ... ·-· •" "l.._._,.. ..... ~nff'n - ,1'18( - ,l"L°'l

•:11111 ..... ·-· •• -. ~ lrlll 'DAn:> - ,t'LR - ,o·n, ..... ,._ •• 1'91•JOf ·~,·­

~•'iln• n --.11:111•- "•"'1• 'Dl_•.....,. '"-• .... ,....,,... •1•• innn - ,o·n, - ,o·,n ·:11111-•

'•1'1 ... u,,m !,u..,., U'llS - ,o·tii - ,o·zii ._.,._ 01 PQ•10[ !--,, 01 Dll\:lll•N. A"t•:19Ulf•• 't- 1)

•t-.dtue ·•• -w- !.nnfl - ,o·nz - ,,·ttt ·~ #lnffll"~Fl:tt - ,O

....... -.. ,...JOI' •--. 01 _,__ •::on~ ·••

01 .,..._,... •1•• tnnn: - ,0·1n - ,r,n - ---- --··----~-· -----

f-------""'=• -..- _!.ft'Pffl_ -,rm - o·to1

• ...., - ,o·tot - ,o·tt I------~--

u.an, lmffl - ••• ,. - ,o·tt . ..,. - ,o· Lt - ,0·1

=-=--=-....:~-@!IT_~-~!,,:,,_,,;__( ~-!•~!_I

., "' CII.

,, . •

... . ,

---,r1,c ..,n•.:aoJ .... , JO l •~-•M

..... , .... J ..... ,!:JO l ••i-•w

,o·nz

--1-JiO ,on

I -..,,,.~ , ...... q···· !i~i~hl--'/ _..n :, J :::::: ....

•m 4111111'14 .. ,/t JO

• • •1u-t1 ·-· .. ... .-1 ... 1'1 -•W 'l"I

0 }'.'W£"s-¥"""l-,,;ea,,a .... ""'~·;~!;;;v.

'' , n Ji' wD,llD1C,

~-~t~L '- IT

• na-•w:

01Q Dt "...-0 ' ·,~,, ·~ 1'.''iin .. -

,e•o,n:, tz·nn • Ol'O(fll ....

I"-:;:;;:~~~~·~•·'~"~"':;;:"~'=":'"~':':'":'~'~'":'·~"':' ':":':"'~'===:;;;::~':';;;';';::;;'~0

1: ; 11aM Jt!,~s~c. •o:, iiinPG NS:> P11ntf ~8 p&ll!J(] ·~2::;.1.;•~601 10:i1d1.1d099 .ot.,..-;,-~s paMio1

~-;-..,;;;;:.Mtl;:;i~;::.·llit tW:;.a.7o:; OiOQ JillUO ..opMo.1a ...... Pllil).

( ,-,r;t71'-P--..X k::1 ·soar, 'IM lJ 9 Uri (pul'l0.o6) UO!jOMll3

-u,.--a,oa ~Yl'Plr Id ·soaw ~ 1a.o.a1 Ja10M 0110,s

11µ,a ~ .. • ..-g po1uaw 6u11tt.1o~u1·-·pe1a1du.io3 tt/ZII un6aa ·aJ ,·ff(1.udaa 10,01

•. 2N J \ I UOIID:101 (I All} 1P50FiOt7110N JlilM JO l,IUG9 09' ...... o nt .......

----..i -iliD1$ ---~~CC ... H1 ..... .-w ... ---..-iii"lin••t4iii itJOjOit;j ---· -...,.Ja:io:· D01ii.. ilMlll'I jJll(O'd

113M .,JO !>01 l JO l .133HS

0

""'

8lJREAU OF ltEa..AMAnoN • REGION l S1i£ET 1 OF Z

LOG OF WELL Project tm,r ttton Mvhfon F.atuNJ Be!Gtatnn Pdll ftnlt State Idaho

Well No. 611/)tiK - 11 .ol>l (Siu 11) Locotioo 1111 !ill!: S•cti"" 11 1 Tfi•,~! (Nonuvl.w ku.)

Toto! Oepth_--"'02..2... • ____ Be9un Cal:il, l;Q(>\ 0--Sbd'

ZIJ0/69 Completed g/29/69 Drillinq Method C.,ts 111 ~99::1002 2'

Stolle Woter L,11et, _0•e•e•c>o•e•,-,_ _____ 1°boveJ Meas. Pt .. --~·=-~'="'c-cc _________ Dat, __ -__ - below -

Elewation {,;round} 4817.90 W. L. Mea\, Pt __ .::: __ _

Yield, __ ~ ____ Drowdowo ___ ""-~u~.,c~;~~ ~li~~~l~=~r!:."C:: r"pon:•;Gi~ m±rfl:~ ~ ~-Hunkctt Geophysical Ulg@IIWIN-Sa.om.& t...,peraJ;pn, Or1l!11d By and JU9tic• Con DrUU,u;

Onlling Oata l'\lrr(I Tflh

Woter Samples

Cl,,on,. drill to 501.7'; vin.U.... dt......a cor• to 1002.2•, ...._r Sp,a. 100C-l060

'top of l()• CIL ta UU.2.5 (Mab pt).

uu.,2 i,.,.~ 4419.60 •• ,,. 481'.115 J6.U' ,w.,o 12.n•

Or1&1,Dal llol• l.o,t b.i- 710'; ddoetucbd bol• drtll,d to 990' .

Dflcr,1,,,0l'I af Wotil

Complet<on

,,1.pu a.-. 3/4H 10" a.: t.liraad,d--1.dad

Oll""lin&, bad<

·=· ..,,. ]/4" aur:fac, -

2.U' Gl'out _

160' Gra-1 267' C. po,rt.

k-:}_i) a.u F: -~~ SILT

PROJECT lmlr Ittnn WX1dm

1:,::£ " ? \ !

~ I \ I I 7 I.')

' 4$ r-'-;;-1

) ! ' .l a

I 'I

~

ClaQ,f,cat,on aftd P!l,1.;:o1 Con,:M,an

D 0-10 sn:r. a-.tJ

~

•

10-161 B.ASALT, hrown-ar.r,, flM arat.a.ed--9..-y, I-Utt.a red to 111•no,.. fill, faldllpff lad>ol; brolt.a 74-411, 92-96 f-t..

er 161-186 AS&, araage-nicl, lfitt, fnpo:au of r.d •corla, t.racoi of ~ ....i - 1,-.

186-200 a.u, Ulll, uhy, f.U.. ~n :lQ -rer, "1th i!lcl._i.,... af b-..J.t.ic &1- 4Qd rtiyolim ........

200-ns SilD, coarse, p..-.U..t..ty , ... n:. •U:b rbyoliu and bulll.tlc &1-•·

215-223 CLIJ, 7<1-U--11:4D., &11b:,, .c:i.'*1, pl-etc.

213-216 USA.Lt, p-:fJ, (inc, p-4.iaed, aa,rtac- ..td clay ist - -1c1 .. 22.3-229.

276-27' SOOII.A, or.....-Nd, &1-Y, ti.c. Nd ....

279-JOS B.ASM.T, n:4-p-..,-, -..q fU. 1Jta1_., -1COL ••

305-318 IIASALt, b--.ray, U.. s:<"1-4, f1-ly ,....ic:ul•r.

1111-121 u.s.u.t, d4rlr. srar, -ry n- &r.i...l, v•icul.u to ..,..riau.., ... , w:ldi po,,.._..nd sa:,n,..

]27-170 &.\SALT, bnND-&taJ', f1- &r..i-d-aliptly •ua,.ry, trace of wldta ~ ~- J,1,0.

370-38) SAS.AU', nd, ft..,~. -i:r -1eai.r, - u11e,1 nu. adu tl,J-, u.....,.c ,..u-­or-a, Mb.

385-440 U.SALT, b--.n,y, ""r, 61M lf"~• t"""' of fal.41:pu lAu.- b> l -.

440-501.2 ~ALT, hTOlftl-rH., f1-.ly -iao:J.., tt-..;,a af fddat>,u.

--WELL NO. fil{:W - 11 rt

8UIIEAU OF REQ.AMATION - REGION 1 SHE'ET l OF l

LOG OF WELL ""''"-~le!!=s<cie•e•eoa~"•"=••'P~•-- F.ohlre hplor•tog l)rtll Bc>b State loi&o

Welt No. D/161 - 11 Ml nus lll Locotion 1111 111 S•c:ti<>n n, T6s,u6! pti11.uv1- Ar&a) Cabb fool iJ..500

Totol Depth_....\llWCL' ____ Begun Z(lD/69 Completed 9/29/69 Drilling Method eon 11.1g 500-1002.2• Shltic Water Lwe1, __ _. _______ !g!fci:! Mea1. Pt Date ____ _

Elewalion {,;round) u11.,o W. L. Meas. Pt. _____ _

Y1•ld. _______ Drowdown __ _::_ __ =-... c~~:~ ~t~e¥?llU.-o~~-·~ .. noon•· a,p~ ern~,ut: t"'ulJ lltl~OI Logged By • Logg---s- t"'"'Perat11re Drilled By ....t Juatie• Cot• Ddlltng

Dnllll",I Data Pump T.,.h

Wolff SomnlH

Dflcrol!flQfl of Well

Com<>let,011

... , O,aqram

• •• "' ,.n ....... t~ _,.. .,..~,o·

-· ,u·~ -'lll' Cnnru

.,.. ',--&.-~

110' •tart ot L--­aU. tr..,.... Ml.a lo.

r ... ,.1-1.1.a ,,, ol<l bole, JOS-71 • ____,,,,.

,u· ~ -l---­

,21· Gr--t- 1----.-- ·:

\·

z-11,· .J K!S' I p,&rf•.- boU' __,. \'• 990' bottom of i;. ddll trackad L- --· "'

F.:--,.,:itcur EZ3sn.T

PROJECT inner Tsten D1xtmls:na

,, ·c

{· .· •.--:

,f- '. - .

Clou,l,eat,on gnd P!\y..ool Cood,t,on

Cl. S01.2-S01.8 U.SJJ.T, rad, ...._.icl114r to •cori&t-..... '°1.8-S15.7 USALT, anJ to nd-brov11, ft.n. to n,ry

ft.a, 1.-.i...d, dight. ti!.. -icul.u, 11.-=- fi­fddl.p.u latba; •ll&htly &ltan,d ..... tulltJ, ..,ft ar- c1.,- to -1e1 .. 1,.i.,. sn.1.

S'.D.7--674.0 U8.U.l', p-.,. to ~7, disbtly -1.,.J.ar to -ic:ul.ar, -• tu,, fd<laPQ" e}Tat.&b. to 6 -· (.594-SlS).

611.~n.1 a.u:, y.ua.-ca, •ile:,, fd.at b..wtq.

6n.1-611.1 s.um, 1,_..,.,.,., "'t7 u- araiH<I, aub .. auhr &rahul of 't"4r1:s, biotit•, dirty. el.ilfttlr poro.,..

61'9.1-697.0 C.U, 1ray, •Ue:,, f41.!lr borl:t011tal. bad.ting, U,cl,..1o"4 of bladt d . .aders, 619.o-679.6.

691.tr112., SILT. l;r_,., -.i<:.acea<111, c:La.yey; 0.9 ft. allp>tly JICln>uiii • ...,,d at b-e, bleached at c:ontaet:.

n1.9-n3.4 BASALT SI.LL, blac:k, daiae, chillad ~p f-- m4 bo tto•. D UJ.4-723.0 SILT, lirov11-gr_,., c1.,. .. ,., b.U.114 at ~p.

n1.o:-1,a.o SJJID ....i SILT. •lt ...... u.11• lay•ni of 1-- cray d.lt Ml4 fill.• 1n111...i, ~li&btlJ por,:,,,a ca lir11¥11-&ra7 -..ad.

ne.o-so..., aASALT Sn.I.(?}, &ny, d, ...... 11.,-rou, U- fal<lapar latbe, chill..t top a.a,4 b .. e.

811.t..~rus.s SILT ta -ry fine s.um, b- to P'.,-.b- b4D.de4.

i-,t~ • .S-895.) CUJ'Sl'OU, b~s-ra,-, -1-, •cu:t.-n4 tu, c:ad>onllOIQII i,,,c1u,toa.,1; u ses.6 :t. a 0.4' •Ut, ..ttb •4':Ul l~Uo11.• cootain111.1 , (~ta of l,19aay •cort-4J 1...,1.,.io.,. ot •-ic:ul.&f ~t below se1.o. I

ffl.s-92'.7 BASALT, guy, WH-t~r u top .,.d NI:~, pyrtu ill. -1e1-~ ..,.,..1ou1 old fr-.ct"4 baaled rici:P , ...... clay.

.... , ... ,._, ........ ..., n, . .,, .. ,.. u .. ,. I !'13d,S--976.3 POll'HTllfiC IIASA.1.1', gr.,., faldo.p•r htli;l" I

to- "'lS -·, •<:.atta,r,4 Lara• -1c1-, ..,_ wtdt I -lit. cry•t.&la. !

~IIS6.9 nrn:vlOW ?WR:!'. .).l' ti,,• • ...,4, 1.4' •Ur:i &-.6' clayato-, 5,4.'" .1;1.J.t. :,,,LUI tQQ

c:ad>oaac:_,. tr._ate. ~.9-1002.2 M.SALT, aray, _.io::..iu-decrea•. v/ ,

doipth, ~ fillad v/ claar to t..., u,olit& c:i:,•ult,,

~VZ!lCUUI llASJJ.T

~ m.DSPU. Cn'ST>J.S ! WELL N0.6N/:J§g - p pf

BUREAU OF RECLAMATION • REGION -J SHEET I OF •

LOG OF WELL Project 1- tu-. tlh,,h.la Feoture ""I:..'"" ~ '! ..... - rm"":·•'"i''SO ·t. Scut.h aiiil Bo lt. Eut of t.he

Stote hll•ba

Well No Mlm 29-ci (Pl!pJ Hole I} locot1on ID ceuv §ts ,, I 6 N • 31 E ms ifM) Total Depth . Begun 9l5'61 Completed uuu,, Drill mg Method Cebl• :Iaal Static Wot er level S.. bllim

Elevation (17oundl . Yield Drowdown ....... •, • - Geophysical

Dnllil!Q Oo1<i- Do,sc,,i,i..,., Well <i11mp Te,;ts o I Well cl,og,om Wrs+er Samples Comp!el,on

Drlll-.d WIiler 20 1-. bol•

--- ~ -·· lOOC-1005 o.o to 21.0 ft.

Uaolis-blrbed 4:r1,.. 16 la. o.» •• ....,1 .. t.i.. by .250 -u C4:. I -...... + 0.1 to :u.o I ,_.1'" atUdNo:l ft. - builtap "to 4rlll sba. sho. • ........ 1.

olq surf- s• I'' i..ti. ual:,sis by IS ia. bole 21 ,,

U.5.G.S. DeaYer to !kl ft. Clay - - __ ['; tt,..1:rol.islc lali. - seal 62 to 00 f Spec • .-.. spec - ......... ity, 12 ill. I.D. ... spec. yl•W. Yert: -11 c ... • 1.l ..-........ to 151.S ft. -

factgry slloe Saacl first wate: 12 in. liloi. 90 ----et Sl to 65 ft. to 175 ft. I

I w.s. deptbs 10 11. I.» •• ZS - -- - ; {below O.G.) ... -u cs,. + 1.2 •J.ntiou to 404 ft. • 1/10/69 factol')' sboe

10 in. 11111• 175 6la. ~ to 440 n. ¥- 9.6 f,,l. • 4713.& 6 in. l.D. ·"" -11 "1· • 1.9

Z!i·_;e:,, to SOS ft. -factOl'y dloe

El. - 4713.& 6 la. llale 440 to 573 ft.

12 ia. ---. ~tb-47.7 Wall Hee,I El. - an5.7 !!!!ill 16 ia. "t· 3 b. cmpped piJ • b.piii - 4 .9 \ .... El. - an9.5

"$(" in., •

r• '"· '""· I Elevations - --

I fop ol: l" p1i- - 4&25. I 6• CSI• • 4125. l 111" css.• 4aZ4. ----12" cq,. UN. 16· cq •• 4t24. o.G. - 4423.

SA~~k!YPE.DS., .DrlY9 5-pl,e---'"j W.Y

~Ta~;{;~: ~ bSSSj Si LT

PROJECT Inre- Ttto. n,,..

!i:fo':J Meas "' """----W.L Meas "' I J

SM lrliier•s ...a iup<Ktor's npott, ..a Other Dato i•l-'1: fJ•III las cau,-. c- ... C:::... r;

Log b,J N I T s m s G s Drilled ., c-, Drill!• en <

]j t? I coa C1os$•',co•,on and Ph)"'HCO! Cond,t,oo •• h--l ...,

lso ::r . .. ... .. •. .

'"" . . . . . \ .. .. ..

I . "-1 t"N IN f ,, I

"'\ '1 ( .I oo-':::~

11:~ i "'- --1

"'~-"' \

u, ,~ \

' . . . . .

, __ . . = =

r-,,_ 0.0 to 4 - SILTY SAND, c-. fine-pained.

4 to 65 - IIASAI.T, p-ay eal. Nnl, dease to ftSia&kr.

I / 65 to 90 - SAllll Ii GRAVEL, nrlilbb-oraase, qu.ert;t HIid am "-alt, ob$ldiu., sUlcic Yole.nic ud qaa:rt.Ute ,ranb up to :ZS-•

I I !kl to 144 - SAM>, P'>'i• ta, n-sn1a.,1

DS qaa,ti witb - l'"l'"ls, .._, silty and pay wit.h ...,tb.

/144 to 16S - MSALT, .tan pay, ... 1m1u ..

I /,165 to 17S - SAM> I GRAVEL, lnJ', ,._ni sand ud banlt, ob1ld1- IJ:ld silic1c YOlcaslic p-aTillS op to ZS-.

DS I/ 175 to 2l8 - SAND, 1"1', fine-t-.1:1- ,niM<I,

_,tty qllQ't.• ..a b&$alt, h- t•, n--,ralMd -.I 1iJty at tao (!.).

I .. L to 260 - IASALT, dart pay, dense.

I / /,26-0 to 2aS - SNC, Jff7, fine-1rai....i, silty,

!

causer and ci.- 275 to 2&0 and Y'"J' sllty 2&0 - 2aS.

DS 21S to 35& - SILn CU'f, 1-n1, lino, ~s S&lllll.y at lOO, saudy aid silty at 310.

Issa to 375 - 8"SALT, dat'k 1:ray, deaN.

DS

/575 to 405 - &ASALT, reddish~, hi&hly j vesiadar to $COl'iae-,., laO - 405.

lost all o:uttinas

/ /4'JS to 415 - IASA.l.T, I'

li&ht lftY, dease.

~IS <o «S • '°"""IC IWXIA, ""''"' "'""• baaelttc, sppuntly ••sic:u.lar bllNlt ud scorta fnp,mu i• ~l.ar -6-lik• aatrlx.

I 445 to 469 - BASALT, nddish-.ray • Hilse to

j scort~, lollt all cut.tin,• 445 to 450, 4S5 to 469 •

'/,469 to 513 - W>LC»IIC EJt:Cl'A, reel, bNWII, lftY, basaltic, loose cinder's, scoria and obsidiu., lost .,., of aattl"JS.

J ..., = ......,_T _..._ E2,J C!HOEKS, SCOll:IA, ETC.

WELL NO 6NOZF ?9 eel 1:xpl. Llole 9

SHEET 2 OF 2

LOG OF WELL Lowel" Teton 0_!,0, 0h0 i0=~-- Feolure Explorato:tt: Dtlll Hob STote,_aidaho"""-----

Approz. 15S0 ft. Sou.th and 2S0 ft.. East of the Prniect

Well No _,<•N/clu2•'-alo9,•scl~fEa,n...,J~tlo""'Jn~•,>- Location Nit rnrncr soc 29 I 6 M II l1 E fl! S land]

Total Deplh _ _,i,.,A ____ Begun 9'5/68 Con,pleted JZ{J1(61 Drilling Method C•hl• Lwi

Stot,c Water Level loboveJ Meos pt Dole below --------------- ----

Elevot100 (<70,md) W L. Meos. Pt { )=-=,-----Sea driller'• aad bspector•s reports DIO!.

Y1eld _______ Drowdown ______ 7c.S1P~: ~ crac.:.~IOi

Logged By Geophys,cot Log by HI rs /II s Cs Dr,!led By c-,. D:rllJfAS r:n ~rdl1ng c)a1a "'u"'!' Tests

Wo•e, Samples

Oesc,,pt,o,, of Wei,

Camolt•,on

1- - - -I ,,

I 1

i 1

~ ~

l .

Classif,co•,on ond Pnysicol Cond,t,c,,

SU to 517 - SILT, OTUI:•, sandy, li1thtly indurat~, u:nderlain by SAND, l:all, fine-arainc:l

.,..,,_._. -----------------·--! 517 to 5S5 - BASALT, 1ff.1, Yeslo:ular int&Tbedded with VOLCANIC l!Jl!CTA, Ted and Jny, apparently cindars sed scoria, last .O<Jt of Qt.'l;tiep.

S55 - 573 - YOI-C,\NlC MtECClA, reddhh, ~ltic, apparantly Yasic:ula:r basalt ud sccrria in ir-i,ul.ar, mud-Uk• ••tri.K, cindars - bottom, lo<Jt MDy CllttirtJS •

573 - TOTAL DEPTH

SA~?t,..JYPE OS " Drlvo 5-pl.J.----j CLAY e:::::J SAND []]1I) &.ASALT

'-Cga'_"ali',.,{ial~c1,,a'coo'------'=='='='=--'-'-"'-----"1°=·=·=·=I_G!Ul __ vs_, ___ ~I'~·='=-' _c_, ... _ ... _._SCOR __ ,A_,_ETC_. __ ___J

PROJECT J.qpqJ' TatPP Oh:tsi@ WELL NO 6NIPf 29N:l llxpl. Ucl• 9

8UREAU OF RECLAMATION ""GION 1 SHEET 1 OF 2 BUREAU OF RECLAMATION REGION 1 SHEET 2 OF 2

LOG OF WELL LOG OF WELL I Project Lavw TetOl'I D1rt•1Clll Feature Tll•t. W.U State Id.Mia I Project i.ow.r T9t4II; D1TI.eia:i Feature Taet W.11 Slate Idil.ho I

Wet! No 6J1/38E-2Sac1 (TINt Veil l) I~. ~ tt. W.•t and lfOO n.. South~ thtl II'! Corrie S.etlm 25 Wei! No 6!/J8B-2"'lacl ('l'ut v.u l) "~· 2l.ll0Jt· v.t u4 19(1) :rt. a.rtb ~ .._.. Q Ci:irDm' s.et1/JEI 25 Location~ fl ,R"' loeolion T, •., R. a.

Tolol Depth ~ft- 6-J.B..68

"' I Begun J-J0-68 Completed Drilling Method sn H,Jq,, Toto! Depth Begunl-1.0-68 Comp!,ted 6-JJl-68 Drilling Method --Static Water Le,el 18.o:; tt. (oboveJ Meas Pt Top at te,1na av efde Dote~ Stain; Wot er Level 18.05 tt. !above! Meos Pt top ot m.alnJ, av 81.de Dote 6/l.6/f:/!, below below

Elevation (,;round) ~-4 W. L Meas Pt !&iR,41 ( ) Elevation (i;1ound) ....... W L Meas Pt. li8:a6 .u ( ) 'Yield S.. BIIJQ'll Or aw down '"" -~ Other Doto ri:1:11";1v'• ,az,.d iMJ)<l<:ta:r'• repart• &.nd polcgte Yield --w Draw down --· Other Do<o !r~'u 1111d ~·• i-.po:rt• IU>4 polc,gie

By " -6 ltiljb C. biriton Drilling C

By ~~J~ ~Ei:!ng co logged Geophysical Log Drilled By 221!! Pd.U!!!& I tliG QI!, Logged By • Geophysical Log Drilled

Ordlmg Doto ~scr,phon Well l ~§ t; Dnllill<J Dato ~scr,pt,on .. , i ! § ~.? Pump Tints ol Well D,ognJrn '"' ClosS<f,cot,on and Phys,col Cond,T,oo Pump T~h o I Well 0111grorn '"' Clo~s,',coT,on o,,d Phys,col Cond,t,oo Willer Sornpl11s Cornnlet,on 8~ i/li-Water Som~ les Cornpltt,on 8~ <Jli-

~umw lio in. halA o.o

I ' 7 e.o to 5 SI!lfi SAimJ tan I

I Sp,aefl .lOOC·958 to lil, i.o tn,

I ti:,' Pant.QI, inib. te.p. c•e:. o.o I 1-r+ \\ 5 to 13 BolSlLT1 aart gA:J, apnit!c, d.nq to l,: ·co,a, Cli.ble to 6.o, e-t w,s1c:ul&r, ollTiJ:M,-bearing

I tuol ~-.0,NYWn, grout l,O to 30 .,-·'1 . \\13 to 18 SAllD1 ~. ftne-grali>,ld, bilAialt a.Pd ,: ?"Clt&T,J' ·li0.-269,ca 1----------i.o- I " I

I

'ole toal 269-685 I I ql&Fts Yith dl.1c1e 'ttll.eaa1e•, :r., ps..,..i.. Two Pffrl- holJ 39 1n hole 41 .135 W :n8 tt. to~. 3(l 1n. I

~-16 to 39 BAW4'1 dlt.n. ~. &Jtmn1t1c, a.nae, I 4-,,,,,_. at.n- cag. 1,0 to 269. ol11'1ne be&rillg, .......

I I " Rar-su.rtaee 39 to 65 8lllD AltD OMnL; nb-l'GWlded to sub-n...lop.4 bf llQT O.tatfi. I u.&UlA7 obltidt&I> ~ v1.th --.J.t illnd oth9T

I clDC Yi1,b test ---..., ... •Ute le va1.t:,ante.i, d.ee1-llnc obatdi.azl llltld in-JllmJI fW 2.5 hn, lt° in.pip. at.Ml I

CNU1Jla ql&J'ts And eooteat vitb dopth.

I -- - 65 to 163 s.utl: gN;r, t'ilw to CGIU'ff gnd.n..S, to 0.05 Ill. at ,el,. in. cq. I I '1 500CI IIJII.· -.:II,

I~ - "' quart• UII!. aU.1e1e Tol~<:9 with b:l.&&lt, t... gn.,.il ot' tiatl.v ecug,orattiaa -- - I I / 610 (:t) to 615 (:t) Silll'l' SOl>J tan, tine gT&!nd

I tut 6/15/68 ! 163 to 16h SILTY CUIJ tan, plaotic, 1tieQ", qUlllll't•' cl.it.n:r

I l'lio'..,. ~ ff I I ~685- '- I .· J.84 to 195 S!L1''t Ct.Al'J ~. pl.&8t1c, llttell:;y

"! 675 to 685, MWA'J 4llrlc PW to black, lathy

I ~ 0.,0 I I !lot.tea~~ ill tG-tllJ'*I, ~ t.c .,..1eula:r, olh1.ne 31 1.50 ,, '""'~95 to 201 SIL'fr SA!roJ tfl.n, ~ tine-gial,-1 '"'" NU'Lq:, ea ... tna: Ttl'p01"ted o.150 2,55 I -tly quart•,

""' ,.,, Total n.pth - 685 n.

I I 201 to 226 SI.JIIDJ tan, ..i.1- to coane e:n,illo4,

COf:t1rruo. tut 30 ill., e•g. qua.rt.a v:lth a111e1c volealtie.i, tww gi,,1vtda -120 till. pa-

"""' I ~ s:-=-•tblt putJ.y- -tell. ' - i .....

! I . 226 to 259 SAIIDJ tan &all gr-.y, 'ftlr)" ft De to

I C~t .)"1•14 , , I ~ I

\ \\ t'i.1- g:raill..S, .i-- quart• vtth ,tliele wl-tNt 6/16/68 • l-.....269-~ eiudce, ,utr top u1 bot.to. 6/1e/(,8. I I I, 259 to 269 SILTSTl'.lHlJ tai, IFIUl4T, .odfflt.t.J.r in-

-~ .. tbWty-I 1· I •-w. dhttnet beffina: pl.ul.N lIPP'l' JlU't, 1.2J lol to 2.1 cant&im &ngul&J' ~· ar di1l.n ~, TNleu-

z l tt.2/min. I j i JAr ~t 26o-269

' (1:t3 to 2.) :r ' · I 10 04/tt..) Co-

I i I i 269 to ]00 (t} BilBAI4'1 aan grsy, a~tte, d'rlctent ct .tar 29 in, hale 2(,9 - 4-ae to ..SU.tely 'tfftcui.:z., ollv1- 'blaTtng -

I ... • 1-!! the to 450 ,el,. in. I i 1.0 a 10 , O.D .• , .500 ln. ' I 300 (i:) to :U5 SMD AltD SAll'D AllD OJl,\VEL; tan; ....U eq. • 1.0 I

j Q,a.Ut,- 'lo 45(1.6 Jvt-., ' \:.,1*1ol4,l f1ne to CIIU'H ~'I tand, inib-6/11/68 ,ho, at li50.6

I l to .. ~ dlletc .,ol,,..,,1c gN....-1 Ji! - T ,12 c-t~ -~~~-~ i.37 to 450.6

I l I"' 3li5 to i.oo (:t) SII4"t IWftl; tel fin• to mad1Wl gi,al.Nd qU&Tt, v:ltb bl.-.lt

f:: ~t:"r.: i---li50.6-I j

i.oo (i) to 435 8oU1'f SIIl1'; 'W, corrt.&1.nll v.-ey I ' ' e14-l. !laCOJ - ' '.J nn.-e:n,tn..s q,art1. -.nd. (-) 0.56 a=./1. '"'- I -!WI - o.i.5 I h35 to 670 (:t) BlSAL'l'J gray to b1'0'lffl to "'4,

I a}lba.n1t1c, i«IM to aeoriA.eOOU$, GlhlDe beU'int I I

I I I I "" i ' SAMPLE TYPE = OCH = """ = """' I

SAMPLE TYPE c:=Jau:t =- =....,, I CR'"" ffi' Com CT, Cu11,r,gs , = ,rnr l:zzJ o,,,,.,. = I CT; Cu1t,ngs == ~GMVEL = 0 DrHlttr, I 0 Oroi len Lng

PROJECT ite!!t 'l'9'toll 01 Tl.Sic:n WELL N ' PROJECT 1- t.ton Xl1rt•tm WELL NO. filll3fll::25Ai:I (To,t \llllll. 1)

BUREAU OF RECLAMATIO~' S!EGIOIII l SHEET l OF 2

LOG OF WELL Proiect 1f;..T.t.ca D1vtlion Feott.1re Obltfl'W.tlqt ll•M4 at 'l'e,t Veil Site 1 State.....I!kh!L. ___

nation 11en:• ll, 1B i le) ll"F(llt. M tt. w.,t and 1810 tt. &,,,it.h of tlw Ill! CorDar S..:tloo :?5 Well No 6n/'61!-n-,~26B~ft~.'~"4 Locotion "'. -~- R ">A•. Toto I Depth lB · 2iili J Begun 12-2El-6I Completed 6-18-68 Drilling Method Qllih tggJ

Stot,c Wot er L\Cve·I 50,0 --~ !g~f6:l Meos e, S..~l""' Dote ----Elevation (11ourid) 6.n:tta - !!!126 I WL Meas e, S..lallZII: I )

Yield .. Drowdown ... -·- Other Doto a.. 41'1.U.:r'• uul tQJleCtor'• NpOTt.s and geologte

loQ,;ied 'l'lu.90 f:roal log of

6~ TH! 'bl 1 Jin ) Geophvsicol Log Drilled Sy l'Alph c. o.nton Drilling Co

Drilltn~ Data cle$cripr.on Well ' ~~ "• Pump Tests cf Well lC

0 '£i'°"'u a Log ~! C1oss1f,co1,on and Phys,cal Cond,t,on Waler Somples Compie•,on u"

D:rlllN under il.U lC I l!et'.r 1;c log of Veil 6N/)8!:.2511c1 (Tut V.U. JIQ, >) S,.C•• lOOC-9'58 8 in."T:T.;"" ,27 ~ - 1~

~ tw aJIP"*imt.e d.aHlt'teatton 4111d Jtlraleal. can-

Drt1lopt,II by in, ..ii elg, + ,Utiaa. G:n.pb.ie log at lift. t.lulA tro. lOC ot 1"11:rginl Ylt.b. 0.5.42,5

I v.u 6lr/~25aaJ.. --· -i.1.0-·

" a.o tt.- i. 111.

I I.D. bank c111. "1.th led .-de _, I '•

~i..3.0- " s.o· tt •• 1i. 1.a.

"' I.D, #12 elot VU. VOIJtld ICN I"'--46.o-

2.0 tt.-4 ill. I.D, bl.a.a c::•8• With .tffl. pl.at ,. -·- ' -so.c-

! ll..0.0.Q 4826.6 ·. top ot eq. - I

.

ii.B27.)4 •••• I. 6/16(: 16 • .ee I {ll.. u.o6) Rlld.1111 • .27.5 t

i w,u ..

1,,.. a 1.a:T.w:-:m

~ I v.l.l. ci,g. • l.O to 237 e•g. •It I 1a taekfil.l...r ~ lll, hol• to I .

I 5 I ff --2)4.7- I 2,0 tt.-la. 1.a. I I.D, blank c•I•

~had~ I -236,7-

I i

S,O tt.-4 ill. . .I I .D. #12 •lot I vu. Youn4 -=- ID ' I --241.7~

I I 2.0 tt.-4 111. I. D. li.alll ua • I Yitb llt."1 pl.at. -·- I

,_ -2to3.1- I I n.o.o.-48.."6.7 I to, of Cl ••• -

4827 .li.6 1,Y ,1, I 6/16/Q ail.a- !

.

(Jl. ~]-~} I ~-Rr Rlld.1111 • 25.0 t' , I Wall U

I a ill.-r.n:-7m ill, -U eq, +

,.,_ l.] to li.63.3 I

SAMPLE TYPE = CJ.U = """' = """' CR=C~ I gT= 5':i//~: '"" = '"" = """" = ' .

PROJECT ~ ar.tGII Illrlli1111 WELL .

N °"". Vel.llJ u. ll • lC

BUREAU Of RECLAMA::rlON 310111 1 SHEET 2 OF 2

LOG OF WELL Project Ii!2!'.!ll: 'tn!XI Il1D1lcc Feature m, :tlan w.Jh •t !r.a,dl w.Jl ~ 1 State I!1!!oo

iOIHIIZ'n.tion Wel..18 U, U1 a. le) locat1ori

A~. ~ t't, V..~ lilDII -- tt. SOv.th ot the ll'B Comer SIJ<:t1Ql:l 2 Well No. J/381,,25,,gh er:) & ,cit, '1',6111 ~· u - ft, Toto! Depth UI - 2!1:6 3 Begun 12-28-61 Completed 6 16 68 Drilling Method cau.~ Stot1c Water

1Ee~e~O.O S,. l!llW (oboveJ Meos

below e, Dote ----

E levot 1on (ground) A..--...... - ~.I W L. Meas e, SM lillllmt I ) '

----·-- -------- ~tll.dd,r~.'.• and ~to:r·• :rvpartll and ~ .. I Yield Drawdo11.m Other °"" 'l'w:1111 t:f'(II; log of

Drilled By ikl.pb c. Denton Drj.1,llpg ~ logged By Tat ileJJ Do J Geophysical Log

Ocill,ng Date Desc,,p,,an Weli Pump Tasts of we;1 lC 0iji,o'1.t, Water Somples Complet,on

Wl9l.l. U Co!lt' I ~--=~· ' to6:rt.l2ill, I to z,t,. 10 i.J:I. to ii.39 - .U i -:n.o.G. - 1,826. I top ot UI· • 4827.42 •••• 1. ! 6/1.6/68 "·'" (:ll • .eos.~) I -~· 39,5 ·

"· I li83 .] BcJttal ot 8 ill, I e•II• alld p,:,rllt.

I I

1---681.0-____ I_

lotto:. at 8 ill, boa.

SAMPLE TYPE· = CI.\Y CR, Cort

gr a §':!/;~?: I"" = '"" FflOJECT t.e:t '1wtoll 01v111011

I "' ~! ~.~ •• ~

5!

.~ ~'

•:

££] " I

I -

-

-

-

-

=""" G:::J GP.AVEL

Cl OS$,' .cot,on '"' Pnys.co: Cond,T•on

= BASALT r-1 WELL NO. 1.e 7 &o IIL<:4

Qlle.il.Ufll il, ll!I •

' !

I

I

1~ ' -! e

• " i 0

• ~ 0 z

~ ~ ~

l, w 3'

e . *

0 ~

-:l

.!! u.. ill! 0 r " :: 0 .!; __J ii

~

"

7 ">

c " " i z i 0

" s

4 ! " ~' u

" ·' " ~ J;

I ,7 " i " "

35

2 0

:; • • ~ • " 0

• • • ~

36

37

• 0

I

38

BUREAU OF RECLAMATION - REGION I SHEET l OF 2

LOG OF WELL ProJect_L<iwe:r Tetoo D:lvtdoo _____ Feo1ure ~~~~ Drl.l'! Eole Sh9_r_t secti.9n N _and .S: Stote~I•Ooh-,'-----

(ltl;pl,on.tory Rola l.O) Approx. 400 f't. Gout_ band 40{) t't. ·~e•t o~ the NI:- c<Xf!ler Sec. 2 Well No SJV36L2bdal Locat1on~...R....3.6...Li.U,.a.. ]nod.). ______ ' ______ _

Total Depth_~o_ _____ Begun 6{?<)/(.8 Completed_..'1}_~Drillrng MethodoCe•>•l••OToo""-l'------

Sto!1c Woter Level See belOW' lobovel Meos Pt Dote ---------- below ------ ---------Elevot,on (ground) 4764.0 W L Meas Pt---~--_

Y1eld _______ Drowdown ______ -;,._,,o,~: =+~~ ~---'-~-~~(12"_'_• __ '---~ a.nd __ e_•_ol_.,., __ 0_

Logged By p &-oote Geophys,cal Log by Ii RT~ Ill.~~" Dnlled By .c e Dr1JJ1ng co

= "'""" ~ CIITTl!!R3 &. TUFF

PROJECT twcr Tatem Divid® WELL NO ~? s:.1e '\?J

BUREAU Of RECLAMATION • REGION 1 SHEET 2 OF 2

LOG OF WELL ProJect Lanr 'htca D1rl.91on _ Feature ~tory Drill Bou Short ae,::,t1on_N ~nd S ~ate l6lbo ~=-;r"orv ~ 103--- _ APP"QK". 400 ft~Swf.b iiii! iliW rt.. w .. t of tne eortin' Sec. 2 Well No. ;?!;IQ.al Locollon 'l'. 5 B., R. 36 B. (u.s. land)

Total Depth "" Begun 6/';!!J/f;B Completed 9/4/68 Drillh1g Method cable Tool

Static Water Level SH bel.om'

Elevation {ground) 4:@:.0

Yield Drnwdown

Logged By ··- Geophysical

Dnllmg Dato C'escr,pt.on Well P~mp T11s!; <>I Well 9,agMm wo•e, S0mpl11s Comolet,on

12 1n. bole 638 to '923.

6 hi, t.D. -~ lo c•s:• + 2.6 to 965 - Vitb !9ctory ebool

-- - -' I I I I I I I I I

---- '-

Bottca or 8 1n - - - - -bol• - -

SA~~?'t"'JY~ DriV'l'I Bwllpl.a 1·---.:/ CLAY CT O Cutt,ngs D Dri 1 !11rs Log =SUE

PROJECT tlllftll' Teton T:1YldM

!abavej Meas below P> Date ----

W.L Meas. Pl ( l s:,;.; arcrner-..--am 1n11pector'• n,p:,ZU ua geoioerc

Cal.1~:r ~~~-log la: ll ~ t,5:,t'.l!,§ Q,§ Drilled By ~Dri~Co.

~

'

' ~ s i:i:. Cioss,•,co•,~n ood Phys,col C,m!!,t,oo

' "' 88! c7l1--

'" ·q1~1

I I

' IDS

11· • ,,. --'

'

I I.,

I 1,oc I

"'

Boe

B~

'°'

195<

.,

i • . I,. I

. i •

I "' . --

' . .

' . .

. -- I I

'I -----··-" - 853 to ghO - CUI.T, mediia to darlt gray ---- .. ------------- -------------

=-==-:.. --------r:..=-=-= ---- ~990 - SMD, medl1& to 4ar:k ~, tine to ----- l"ll1"J' tine gra.Jned, 1110Jtly bual.t ..0. obi11dllll\

vtth laHer quartz.

/990 to 995_ --· ~Y, ~- to dan. gr-.:,

f/'l'otal Depth - 995 -

~SA.RD ="'"'"' ~ORAVBL ~ CIJltJlflS I!, TUFF

WELL NO 5n/36Jt..:!bdal ~. Kole 1.0

SUREAll OF RECLAMATION • R£Gl0H I SttEET 1 OF 2

LOG OF WELL Pro}ec! Snake l'lafo __ ''-'-"-"c'c" ___ Footure Exploratory Drill lloh - Wen of Rnbnu

Well No. Ml ''iE )4a~:a (Site 15) Li;x:ation NEVlE!tNV<. "'"'· 14 1 T. 4 N., II.. 35 E. 1 Jefhnon County

Tolol Oep!h~WcOeOc.Oc' _____ 6egun 7/29/69 Comp1$f$d ll(l/69 Otillir19 M<11thc(J ft!~1/Q~jH Drill ""d

S!<llic: Wc.!iGr level fg~J Mwt. Pt r.,,_,.t Slde - top of 6" <:&ai,,.g Dat<11~

Elevotion {ground) 4939.66' _______ w. L. M@ns1. Pt--,~~~cr;;-~c::;-;-:::;,:=

s,r~,k vatn ~t

412.0' )/31/69

s,~ndini "°''=r l~v~l 406.8'

top ot' cas(~g 11/)/69 Elov~<(M .(5)3.5'

SAMPLE TYPE CR = Cor• CT= Cu!!•ll<J• 0 Or,l l•rs

upon completion shomi klaa..

42"

I I :: ii

f /

,no.o• bottom 0-.t---+•-1 6" csg

500.0' bottom of 8"

hol~

1:-=c-$! k~

PROJECT ~'""•"'•'~""""'"' ,e,ecshaocrne<~--

200.0' to 104.0" - ASE.

204.0' to 1,iv,i; 251.0' to

282.0' brok,en l,.,,,.; 374.0' to 384.0' fract<>r""1. hw"-' 395.0' to 417.0' brd l>1v,i; 417.0' t<> 427.0" fracrnr<ed lav,,_.

460.0' to 465.0' - SEDIHD<T (ASU); soft; ae...da

" .. 465.0 to 500.0 - l!A5ALT; 483.0 to 492.0 brok"n hva. -GRAVEL

us,,,., CINDERS Ol'I. ASH

WELL NO 4N J5E 14aaa Sita IJ.S

BUREAU OF RECLAMATION - REGION l SHEET 2 OF 2

LOG OF WELL PToj,ecl Snak~ l'ldn R.-cha~g"' Foell.Ir¥ £:<plou,ory Drill Hoh - Wut of Roberti, Stot, __ ,c<c•c>0~-

\;!fflll Nc,_1,N 35£ 11,a.a~ (Site 15) Loenlion NE~~<.;EI-SE',. sec. g T. 4 N. R. 35 L, Jo,fhuon County

T@kll O®p!h~l"QeOO='-' _____ S,i,g1.111...l.Ll.2.1.il__Cemphit@d Jl/l/69 Drilling Method 2Mell.8Hl"J'. brill ,ind

Static Weter Lv,;el c'=""·~'·--------l-lMem>. P>~ °' - ~,n,.cf 6" <-=I.no: r,,.,.,. ,,,.n~ - Del ow El@vGtim1 \ground) 1,919.§6' W L M<ws. Pt 0.60 ,. ao ~~ Gn:wnd

Yi@M --~9 =----f.lr<}wdown .O!Mlr Dern c~ologi~~;~ u~c~,,~c. ,o~=o~ -~ --~

1,000' total d"p h

PROJECT Snalce Plain Recharg<,

' 3" js,, -- -,-s-,,,,., .. , C, \

0,'0.<' cc, ."\' .-. SF'.;HFs"T; ~,c ,,.,.,:,

~;~1:: ,/~1;;, ; . ; ,~; ,;_;;-;:~;:~. ~---· . -- '/ -"·; ""'"'}'.~i~;

'"" SILT

' --,-- · ,,·ac~.'-r tc #li.sce~lJ "~sic~:.,,,; ,, ··'·t:y '"'"'''"'

P"£f"T'"/~,.,',"""": CB 5/C.G' t~ osv,1 ~ Rf.SALT; l.ittJ.,

r""'\>""r-"1~-j--j-7·72.2' u, 820.8' - BASAL!; ,..,,;i'-""' duk guy; '" ,l"1'"" 100 e-quigranular; phgioclue ph,mocryH•, 11tth

,0.:, ,l, ,,, '" 9

, CR olivine; highly ve~.tcuhr to dens-,; alightly ·ir:tr,;,-,,,. , jointed,

_,_,- 40

, :;:;,t.,,.. 99 ,, ,.,,r;;;;r;;,

,, ""1'"" 90

±,oo I '° ,,,.,,' =

820.S' to 876 7' - MSALT; mediwr: guy to d'J5l<y CR red; equigrnnul.u to aphan!ttc; pl.ag1och.~e pheno­

crysts, H<th olivine; highly veslcuhr to dense; ~lightly jol.nted.

870.7' to 876.4' SlLT; "'odnsu Hddhh-bn>=; ~llt or fin" 11.and; baked.

8)8.4' to 1000.0' - l!ASALT; dark guy to br.,.,,r,isb­grny; equ!gunular to aph,mit!c; no easil, tdentifhble o,J:ner.>ls, poGG!bly plagio<:l•,.., pbe<><>­cry&ts; gree<>ioh cast prob,,.blr due to oHvino, or

CR Hphlbole; h18hly vesicula< to den~e; •lightly u, mod<,utely jointed.

Nou: S<oriac,.ous, c!nde~y. ~nd highly v,.~:lcubr zones &hm...-, by -.r.-n!cal tid.z on log.

WW Cit.I.VU

Mm, CINDERS Oil ASH

WELL NO. 4N l5E 14&..,. Site li5

"" I-'

BUREAU OF RECLAMAflON - REGION I SHEET 1 ·oF Z

LOG OF WELL ~ibY Al"N

Proiect Lower.Teton 01_¥h1on _____ Fenture Exploratory Drill ~le (Ptezwlfn) Stare Jdlllo

Total Depth

Well Nu 4N/3BE...::...1_2bb] (S1te )4) 'Location NIWI Section 12 I ..LIi R 1_a E ~ · C1bl• f"ool to 510'

"'"'"""'"D ____ Begun 8/15/69 Co_mpleted_ 1.tf9.lii__Dnl!ing Method OjNQOd Car, to JOU'

$101,c Water Le~~I SN bel~-----a:~fci!l Meos P1 ·--- Dote---5..-

Under specs. lOOc-1060

Chul'l'l dri 11 to 510', wi !'I!! 11ml diamond dFI 11 ~N, 510-1026.0'

AtWl'l!)U!!d l'l!!Vel''St

c1rc. 0-45', 210-235'. 475-510'.

HP El«vatioo P1etp.

' 453o.36 • 4830.5$

' 4830,60 • 4830.80

·r "·•'" (lo~ csg.) 4830.97

Wat,r surface, 1/19/70

Piezo.

' • C D .,.

Elev.

4732.68 4790.35 4790.88 4790.56 4813.87

-·~. JllJlL : .

; ,o"u•>~: : ~::~.05 :

'-"escr,v,~" o I 'hell

Com.•let" n

w ~-~-

.. >••

"E~ shallow wate (3/4" pipe) 10" cs9. ,.,.,,

190'

200'

PIEZ!HTER D ( I' 011111) 420' grout

452' gravel

475' t peris. -+---475-490' perls. Ii" csg.

tt".~:.~ CLAY

C2'3J SANO

PROJECT IAl!fflr Totno DJY1doo - Iatan Bu1t1 Project

0-20 80ULllERS i ·20-40,5 GRAVEL, vfth boulders

40.S-90 GMVEL, 1111adlua to coarse

I

;90-105 GRAVEL, fino to lllltdhw

'.105-157 GRAVEL, coarse, with nm:l; cobblH 106-115 i and 120-125; gravel ,nd sond •h'id Mith li¥d I l50-1S5.

SIT£ 14 WELL NO ___ _ 4N/38( - 12bb1

81.IREAU OF RECLAMATION • REG!ON I SHEET t OF :t

LOG OF WELL 1'1gby A.NI

Project~I" J,~J.!1tt•--- feature tg;1on19!I Dr111 Hole {P1ei:.-ete"} State ..... Wtll No 4111/38£ - 1Nt1 (Site 14) Local ion N11N Section 12, T. 4 II., R. ¥ E. , Jefferson Col.mty

ti61e Tool to 510 1

Toto I Dep!h 1026.0 Begun 8/15/69 Completed 12/9/69 C-rill ing Method 01-and Core to l OZ6

Static Water Level . !above\ Meas " - Dote________:______ below

E levot ion (~ound) 4829,55 W L Meos " - { J . Yield . Drow down - Other ~a1~ Ortller, Inspector, and ~rts

~,ec:trtc, a per,-~iiictl"'l..,--ey- nr1nd PUinP Co Logged By §. I, KlsQtt Geoph9sicol log~~~~-or;lled By Jwstl~ Core Orl111!!!1 Co.

Orolliog Cato De\cr,pt,o,, Well k ,;} "• ::1ass,',c,1 r:Cm!J,t,cn P~"'4) Tes1s of Well L. 0~ e" '" nnd Phys,col

w~•er Som . les Com<>let,~n D•~gcom i>-

C ......... ~ D 500-527 BASALT (J/44 pipe) .... 52.7-582. 3 BASALT, med1 u. gray, fl ne 9ra 1 ned to 528' •=• 4-Y~· 1-- 568.4, 'tel"')' fine below, nuiwel"Olls feldspar needles

•. c:-.r. !CR . sllgtitly to mderately 'IMicular with very ::: {"::~. i5!! -,:, ... I Yflf cuhr red-gray iones, 551.5-562.6, 571. s-sn. . ,._ 573.6-576.Z; broken, cavfng 530-S40.

-~-~-~l 'S82.3-59S!.6 BASALT, gniy, feldspatJt1c, YHY I vesfculo.r to 58J.O, 110der11t@ly vesicular to 597.7, .. I I scortateous to 599.6.

c-i !599.6-656.7 SASAI.T, gray to gray-green, dense, I felds~tllfc, inclusions of red ffSkuh.r basalt,

NQ ; -,'~-~ i 645.0-653.5.

t.. .. lt. i656.7-658.0 BASALT, n,d-bN!m, very "tt!Slcular,

I • ~li I slightly altered.

I r,~~ 658.0-744.1 BASALT, mml!l'OU$ fine fi,ldspllr tlffdles

' 676-686 green-grll)'

I ' 709.3-717.2 red, vesicular to scorlateous !

732,9-133.4 red, sc.orlateO\I!.

P1E"ZMT£R S I( I I (j/4" p1p,e:) 1744,1-751* CLAY, rusty red, silty, flm -- ' ,.,. ,-,

J< 7511:.753 GRAVEL, ffll!dfu111 {2\~ rec-cwered) subrdd ·1! ·. · .... '

pebbles of ~ray to pink quartzite ud trace of

728' gf'lll'flll .

'· ~ green lgneoos {d1orlte1) pebbles .

( '763-7713 SAltO, t,!"i)i,#1 with cley and gravel

" ,,.. l oerfs. "·-~- -- t-;- 778-784 CLAV, $1lty .. ' D ,184-811* RHYOlITE TUFF, light gniy to 804, red--tai'f .. ~*$ 11 1 below (~Hgttly alten,d to nd--tan chy}; with ... / .i.- phenocry1;U of quartz, unadlne{?). and tract! i' Ngnet1te, dip ].pf), ~~··f'~· ,, • 000~ .. . ~ s•o-scc>

IEZMTI:R A . ' tii1 811-B40.0 CLAY, m-tan, firm to pl1istfc, $1lty 1,~, Dlj)e/ .. 840.0-8119.5 BASI\LT, gr&y w1tll zones green-gray,

nu111erous feldspar needlitt, dense to rnoderiltely .. ,. ,-, ---r--- ··~m vesicular, trace ieollte crystals at 848.5. r·· graffl

I 889.5-898.0 Cl.AY, red-brown, silty to sandy, c.onh1ns angular basalt fragments.

I : ' 898.0-970.0 BASALT, gray to red-brown, abundant [ ·1m feldspar, dense to 1110dtr1tely vesfcuhr, numeroos

! broten zones below 936.S. ,,,. 'E. perh. -+---- .1!1 i970.0-1026.0 CLAY, brown silty to green plastic, µI with thin hard lay,n of calcareous silt to sand,

I with z.ones of fine grained brown clayey sand,

I beds dip So*.

·1 j~"'""' [

I i I ;m1J~f~ i1ffl.O Total dtptft

S.\ld'''_E " Wc"Sl ClAY i;,;~-;~ '"'"" = """'-"'""' C'l' Cc,e :11~ ' ::-T . ~ '"'"" I ·.;:.J SARO lilSALT c:J SITE 14 I C n,,,1er'- . "

..J

..J • ,; w & N

31: ,.;

" ~ 0

J " 1 0 • ..J " • • ! i •

f -. 0 : 0 e C ;,

! ., N " ~ . ~ C

g

" ~ • .!, ; " " i l1 ~ .2 i

i ii ·~ I 0 ,t {!. ,:; w

" 8

' j 1 !

j :i

I • Ii

! ' z l 0

~ ~

• ~ i .: ' ]

• 3 ' 0

3 i~ • £ I il

C

;, g . ~

~ • 0 0 IS

0 ~ l " ~ C

3 ~ ! g .!I,

" ; ~ ,! 5

• u ti ~ :g 1 {!. ,:; w ~

8

§ ' " ! 8 1 .

f ~ 'i /// ' ~ ? ' i ~ a

l

'"" o,,,:...~

8 ~

' 0 ! 8 ~

' f ~ • /// f ~ ' ~ -8 ~

v

0

i '" C,

/// ;: ~

3

~ . i 1 • ' • i ~

~,I u •

~!! ~. ~ ~ "; ..':'!

~] ~

~ 3

~I ! . .s!;

.

~!U ~2 E - - ~ 0 0 O

dd! HO

Is ! -' ! ;,.!

~'s

42

~ ;,

il

llJ i;J H:I fu]

43

PART 2

OBSERVATION WELLS SOUTH OF ARCO

AND WEST OF ABERDEEN

PREFACE

The Snake Plain aquifer, as defined by Mundorff, Crosthwaite, and Kilburn (1964, p. 142), is a series of basalt flows and intercalated pyroclastic and sedimentary materials that underlies the Snake River Plain east of Bliss (fig. 1 ). The aquifer is about 9,500 square miles in areal extent and is one of the largest-yielding aquifers in the United States. Approximately 6Y,-million acre-feet of water is recharged annually to this aquifer by seepage loss from the Snake River and its tributaries, by underflow from tributary valleys, by the downward percolation of water applied for irrigation, and by precipitation on the Plain. Water is discharged from the aquifer through springs and by pumping for irrigation, municipal, industrial, stock, and domestic use. Although the aquifer has been extensively studied and its general extent and properties are known, it is so large and thick that data on the distribution of the basalt flows and interbedded sedimentary deposits that control the movement of ground water have not been obtained at several places of great current importance. Also, there are large areas where the position of the water table and the potential yield of the aquifer are not known.

The objectives of this investigation are to obtain (1) information descriptive of elevations and fluctuations of the water table, water-table gradients, and the distribution of transmissivity, in areas of the Snake Plain aquifer where data are lacking; (2) details of stratigraphic and hydrologic properties at localities selected as being suitable for pumping large quantities of ground water in exchange for surface water1; (3) hydrologic details in the eastern part of this aquifer, where the greatest amount of recharge occurs, so as to interpret better the distribution of recharge to spring discharge areas; and (4) water-level and stratigraphic data in the area of the Mud Lake-Market Lake barrier so as to better define recharge relations and large water-level differentials occurring in and around this barrier. In addition, it is expected that all the data collected will be integrated into an existing analog model of the Snake Plain aquifer so that the long-term effects of development of the aquifer can be better predicted.

The Idaho Department of Water Administration has the responsibility of administering the water resources of Idaho, and for this reason it is vitally interested in basic data descriptive of the water resources of the Snake River Plain. Because the U. S. Bureau of Reclamation is actively developing the water resources available in various parts of the Plain, it needs basic data which will be useful in selecting areas suitable for development and in evaluating effects of development. The U. S. Geological Survey has a responsibility for collecting basic data and for appraising the water resources of Idaho. Because of their common interests, and in recognition of the need for information about the water resources of the Snake Plain aquifer, these three agencies entered into a cooperative agreement whereby the U. S. Geological Survey and the U.S. Bureau of Reclamation would initiate, in

1 The U.S. Bureau of Reclamation is investigating the feasibility of diverting surface water from presently irrigated land to areas of inadequate surface-water supply or areas of no surface-water supply and replacing the diverted surface water with ground water.

XLVII

July 1969, a 4-year project whose goal is to satisfy the objectives described above.

To provide for timely release of the data collected during this 4-year project, it is planned that a series of reports describing the work accomplished during each phase of the project will be prepared. The Mud Lake region was discussed in part 1 of this report series. The present report (part 2) concentrates attention on an area farther southwest, where the hydrologic environment and problems are different. Part 2 presents (1) water-level and lithologic data obtained from drilling three observation wells (2N-26E-22dda1, 1S-27E-14dcc1, and 5S-28E-26bbd1) and deepening another well (3N-26E-22aba1) on the Snake River Plain south of Arco and west of Aberdeen and (2) a revision of a local part of the existing regional water-level contour map.

XLVIII

CONTENTS

Page

Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Introduction .......................................................... 51

Well-Numbering System ............................................. 53 Results of Drilling ...................................................... 53

Well 3N-26E-22aba 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Well 2N-26E-22dda1 ................................................ 53 Well 1S-27E-14dcc1 ................................................ 54 Well 5S-28E-26bbd1 ................................................ 56

Evaluation of data ...................................................... 56 Revision of Water-Level Contour Map ................................... 56 Evaluation of Hydrologic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

ILLUSTRATIONS

Figure 1. Map of the study area ............................................... 52 2. Diagram of well-numbering system ..................................... 54 3. Map showing water-level contours ...................................... 55 4. Well construction diagrams and logs ............................... in pocket 5. Geologic section ................................................... 57

XLIX

A PROGRESS REPORT ON

RESULTS OF TEST-DRILLING AND GROUND-WATER INVESTIGATIONS

OF THE SNAKE PLAIN AQUIFER, SOUTHEASTERN IDAHO

Part 2

Observation Wells South of Arco

and West of Aberdeen

By E. G. Crosthwaite

ABSTRACT

Three wells were drilled and another well deepened in a part of the Snake River Plain where geologic and hydrologic data are sparse. Most of the material drilled was basalt with a few thin interbedded fine-grained sedimentary deposits. The sediments increase in thickness and coarseness near the mouth of the Big Lost River basin. The water-level data obtained from the wells indicate that the water-table gradient is relatively steep between Arco and American Falls and that the gradient is relatively low southwest of the area of steep gradient. The new data generated in this study permit a significant revision of previous water-level contour maps.

The reason for the steep gradient is not clear, but the water table may be influenced by a rift zone which is visible more than three fourths of the way across the Plain from the Craters of the Moon National Monument; by a change in thickness of the aquifer caused by a ridge representing a buried north-south trending mountain range; by a significant thickening of basalt filling an erosional basin immediately downgradient from the steepened gradient; or by a fault in the underlying basalt whose trace has been obliterated by younger flows.

INTRODUCTION

Three wells drilled for this phase of the project are in line 5, 12, and 25 miles south of Arco; the fourth is 18 miles west of Aberdeen; all are in the north-central part of the Snake River Plain in southern Idaho (fig. 3). The Snake River Plain, a broad, rolling plain extending from Bliss eastward and northeastward to Ashton (fig. 1 ), is underlain chiefly by basaltic lava flows. Domes, craters, and cinder cones are scattered throughout the Plain and

mark centers of past volcanic activity. The total thickness of the basaltic flows is unknown, but wells and geophysical data indicate that the basalt is more than 2,000 feet thick. From

51

FIGURE 1. Map of southern Idaho showing the Snake River Plain and area covered by this report.

52

Arco southward toward Minidoka and southwestward toward Carey, wells are scarce and, therefore, even the approximate position of the water table in this area has been but poorly defined. The drilling described herein was accomplished to better define the position of the water table in this part of the Plain and to collect hydrologic information descriptive of hydrogeologic conditions at the margin of the Plain where a large mountain basin ( Big Lost River basin) is tributary to the Plain.

Well-Numbering System

The well-numbering system used by the U.S. Geological Survey in Idaho indicates the location of wells within the official rectangular subdivision of the public lands, with reference to the Boise base line and meridian. The first two segments of the number designate the township and range. The third segment gives the section number, followed by three letters and a numeral, which indicate the quarter section, the 40-acre tract, the 10-acre tract, and the serial number of the well within the tract, respectively. Quarter sections are lettered a, b, c, and d in counterclockwise order from the northeast quarter of each section (fig. 2). Within the quarter sections, 40-acre and 10-acre tracts are lettered in the same manner. Well 2N-26E-22dda1 is in the NEY.SEY,,SEY. sec. 22, T. 2 N., R. 26 E., and was the first well inventoried in that tract.

RESULTS OF DRILLING

Well 3N-26E-22aba1

Well 3N-26E-22aba1 (fig. 3) was originally drilled to a depth of 819 feet and, when completed in 1966, had a perched water level of 585 feet below land surface. While this well was being constructed, the driller reported that perched water also occurred at depths of 275 and 445 feet. As a part of this project, the well was deepened to 1,075 feet in 1970 and a 4-inch casing was grouted at 970 feet leaving the bottom 105 feet of the well open to basalt, sand, and gravel. The water level in the deepened well was at 793 feet below land surface on September 17, 1970, and is representative of the water table in the Snake Plain aquifer at this location. As shown in figure 4, illustrating lithologic and geophysical logs, a total of eight zones of basalt, each separated by layers of clay, sand, and gravel, were penetrated in drilling the well.

Well 2N-26E-22dda1

Well 2N-26E-22dda1 (fig. 3) was drilled to a depth of 1,053 feet and cased with 6-inch casing to a depth of 728 feet. The well is uncased from 728 to 1,053 feet. Perched water was found in clean sand and gravel at a depth of 664 feet below land surface. The perching layer is a clay bed from 720 to 728 feet. The only other sediments found in drilling were a

53

6

7

18

19

30

31

FFI I ~I:: I I I I I I ii' '

EE '" sl1sE /,..I :,; IN

IW BASE IE 2E 25E 26E 27E

IS I

t± '" I ~

0

I ..

R. 26 E. I SECTION 22

I ' I ' s • 3 2 ' ' ' I ' ' ' 8 9 10 II 1,2 ----- ~ -----+----- ~ -----

' ' I : I :

T ' ' 17 16 15 ;• 13 ' ' ' ' 2 ---+-- - - _.,__ __ 20 21 ~ II 23 24 N : I : ' ' : b I 0

' ' 29 28 27 26 25 -----~~-1---

' ' b : I I er-' C r--- --

32 33 •• •• •• : I : C l d ' ' '

FIGURE 2. Diagram showing well-numbering system. (Using well 2N-26-22dda1.)

ddol

3-foot bed of silt and clay at 186 feet and another 5-foot bed at 412 feet. No perched water was found above or in these beds. The regional water table is at a depth of 980 feet below land surface.

Well 1S-27E-14dcc1

Well 1S-27E-14dcc1 (fig. 3) was drilled to a depth of 1,041 feet and cased with 4-inch casing to 1,031 feet. A 4-foot bed of baked silt and clay was found at 790 feet, an 8-foot bed of baked red sand at 988 feet, and a fine red sand bed at 1,033 to 1,041 feet. The regional water table is 995 feet below land surface. No perched water was found in this well.

54

-n G) C :xi m

"" (") s: 0 < 0,

"' "C ~

"' ~

C. ::r C" 0

-< f ..,, :, 0, <Q ~ ... (')

!" 0 ::, ... 0

" ~ ~ 0 ::,

"' .... "' ::r

CD

:;; 0, .... "' ~ .... 0, C" i6" 0, ::, C.

0 (') 0, .... o· ::,

0 .... :;; !!!.. ;;;

::,

0,

cil 0,

UNITED STATES DEPARTMENT OF THE INTERlOR

GEOLOGICAL SURVEY

PREPARED IN COOPERATION WITH THE

IDAHO DEPARTMENT OF WATER ADMINISTRATION

EXPLANATION

-4450.--

Contour on the water table, fall 1970

Contour interval 50 feet Datum is mean sea level

-----4400----­··· 4420.

Contours on the water table, 1959, as shown in Mundorff

and others 1964 (plate 4)

Contour interval 50 feet, except where dotted

Datum is mean sea level

e 24ddal

Observation well drilled for this project and number

o l 7cal

Observation well and number

e 17bdl

Well with water-level data and number

Great Rift of the Craters of the Moon National Monument and Great Rift National Landmark

A---A

Line of geologic section (refer to fig. 5)

Well 5S-28E-26bbd 1

Well 5S-28E-26bbd1 (fig. 3) was drilled to a depth of 763.5 feet and cased with 4-inch casing. Although a small amount of water was found at approximately 670 feet, the regional water level is taken to be 680 feet below land surface.

EVALUATION OF DATA

Revision of Water-Level Contour Map

In the past, insufficient data were available to define adequately the position of the water table in that area of the Snake River Plain encompassed by a line connecting the towns of Carey, Arco, Aberdeen, and Minidoka. The configuration of the water table in this part of the Plain, as interpreted by Mundorff, Crosthwaite, and Kilburn (1964, pl. 4) on the basis of data available at that time, is shown in figure 3. Although a few stock wells have been drilled in this part of the Plain since 1964, wells from which water-level measurements can be obtained are still sparse. Water-level measurements in observation wells drilled for this study, and a few recently available water levels in other wells, permitted revision of the previous water-level contour rnap. The two interpretations are shown in figure 3. Southwest of the 4,050-foot contour and northeast of the 4,420-foot contour, well data are adequate to define the position of the water table with a reasonable degree of confidence. As can be noted in figure 3, the contours from 4,100 to 4,400 feet, inclusive, have been shifted eastward and northeastward resulting in a map with a very low water-table gradient between the 4,050 and 4, 100-foot contours and a much steeper gradient between the 4,100 and 4,400-foot contours. Except immediately south of Arco, the gradient is very low northeast of the 4,400-foot contour. As more observation wells are drilled and more water-level data become available, further revision of the water-level contour map may be required.

Evaluation of Hydrologic Data

As noted previously, perched water was found in well 2N-26E-22dda1 and several perched water-bearing zones were found in well 3N-26E-22aba1. These wells and well 1S-27E-14dcc1 are shown in the geologic section (fig. 5). In addition, a test well (4N-26E-21abb1), drilled in 1969, 4 miles northwest of Arco is shown (Crosthwaite and others, 1970, p. 72, fig. 25). The geologic section shows the geologic and hydrologic conditions southward from the mouth of the Big Lost River basin, a major valley tributary to the Snake River Plain. Water was encountered at successively greater depths in wells 4N-26E-21aba1 and 3N-26E-22aba1 as the wells were drilled and cased during construction. Thus, the water levels shown by triangles on the geologic section are the water levels when the bore hole was open between the bottom of the casing and the bottom of the hole. The lowermost triangle shows the water level in the completed well. Well 3N-26E-22aba1 was constructed so as to penetrate saturated basalt, sand, and gravel which are several tens of

56

,, G) C: :::0 m

?'

G) m 0 0

I.C ;;· .. m (') ... o· ::,

en ... ..., ::r ~

0 C:

I.C ::r 0 er .. m < "' ... o· ::, :;; !2. in ::, m "' ~ l> cl ?

A 5500'

4N-26E

5300'

4900'

~-~?l ·." .-a

4100'

4500'

4300'

0

·· ...

UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY

Sosalt

2 3 Miles

3N - 26E 22obol

lc:~~1 1:,:,,~,1 lffHl] I i J I" 01

·····

y

PREPARED IN COOPERATION WITH THE IDAHO DEPARTMENT OF WATER ADMINISTRATION

2N -26E 22ddol

5360

<J

.... • • • • • • Wne.; tobte ··- ... ····· ······ .... ····· .... ····· .... ....

IS -27E 14dccl

Vert,col e,oggero!1on • 52.8 Cloy Gravel Basalt Sand C,nders Crevice Appra,imate posit,on of waler level Line of section shown o~ !,g.3

4100'...l ___ Dcoc'S"Cm_,e•_m~eococsc•co__"<eC"C''------·-------------------------=':.'~d:':'"CmcgCoC'C'~g,_:•:.ss~e':d:_ _________________________ _::===-J_

feet below the elevation of the water table in the Snake Plain aquifer several miles to the south. Thus, the water levels in the well should be representative of the water level in the main aquifer.

The water-level contour map shows that ground water is moving to the south and southwest from the Big Lost River basin to the Snake River Plain and that the gradient is relatively steep, on the order of 25 feet per mile. Ground water in the Big Lost River basin moves to the Snake Plain aquifer in several water-bearing zones, separated by less permeable zones which are several hundred feet above the regional water table. As the water percolates downward, these zones become progressively drained until no ground water remains on the perching layers.

The sequence of basalt and sediments at the mouth of the Big Lost River basin is the result of sediment deposition by the Big Lost River alternating with volcanic activity. Lava flows have dammed the river several times and thereby caused it to change its course. The sediments encountered in the drill holes were most likely deposited behind lava dams or laid down in stream channels after the river topped the lava dams. The gravel overlying the clay in well 2N-26E-22dda1 is a typically clean river gravel. Its geographic location implies that the river had a more southerly course than the present one which is southeast, east, and finally northward to the southern end of the Lemhi Range.

The reason for the steep water-table gradient between the 4,150 and 4,400-foot contour is not clear. One possible explanation is its proximity to an extensive fissure or rift zone. The most recent volcanic activity on the Snake River Plain has occurred along the Great Rift in the Craters of the Moon National Monument (Stearns, 1928, p. 6). The Great Rift extends across the Monument in a southeasterly direction from the mountains bordering the Monument on the north and is marked by a double line of cinder cones. To the southeast of the Monument, three major rifts and fissures with several sets of subsidiary fractures can be traced for 25 miles. Buttes and craters occur along the rifts. The Great Rift in the Monument and the rift zone to the southeast are part of a rift system that extends more than three-fourths the distance across the Snake River Plain (fig. 3). The National Park Service, U. S. Department of the Interior, has designated that part of the rift zone outside the Craters of the Moon National Monument as the Great Rift National Landmark. The most spectacular feature of the national landmark is an open rift in the west part of T. 5 S., R. 28 E., and in the northwest part of T. 6 S., R. 28 E. This rift is open for almost 7 miles and is as much as 20 feet wide. The open crack extends to a depth of several hundred feet. Subsidiary cracks which generally parallel the main rift are as much as 8 to 10 inches wide, several hundred yards long, and appear to be several tens of feet deep. As many as half a dozen cracks may occur within a distance of a quarter of a mile. There is no discernible vertical displacement along the fractures or rifts.

The southern part of the Great Rift National Landmark, in the northern part of Power County, almost coincides with the steep gradient of the water table described above and shown in figure 3. Farther north in the area of the steep water-table gradient there is no

58

surface evidence of a rift. The available evidence could be interpreted to indicate that a buried rift system is the cause of the steep gradient; however, other factors could produce the same effect. For example, the saturated thickness of basalt may be greater both upgradient and downgradient from the area of the steep water-table gradient. This change in thickness could be caused by a ridge representing a buried north-south trending mountain range. Another possible explanation could be a fault in the underlying basalt whose trace has been obliterated by younger flows. Thus, until more evidence is available, the reason for the steep gradient cannot be determined.

59

REFERENCES

Crosthwaite, E. G., Thomas, C. A., and Dyer, K. L., 1970, Water resources in the Big Lost River basin, south-central Idaho: U.S. Geel. Survey open-file report, 109 p., 31 figs.

Mundorff, M. J., Crosthwaite, E.G., and Kilburn, Chabot, 1964, Ground water for irrigation in the Snake River basin in Idaho: U.S. Geel. Survey Water-Supply Paper 1654, 224 p., 6 pis., 54 figs.

Stearns, H. T., 1928, Craters of the Moon National Monument, Idaho: Idaho Bur. Mines and Geel. Bull. 13, 57 p., 22 pl.

60

~~~~~~~~~'---''-'-'--~·.c:.;..A~r~~~s,__,o~E~P~ARTME::.:,~=.,~N;:;T~:IO;;P;:·::~T-~BE~~-~~~~1,;;N;"T;:B;;ltl: .;~0-~-a;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::.::P:':RE._;;',!;P:;i:;~RE~~~D_Ill_CQQft,-.,.,..,..,..,..,P~E'"'RA,,....T"Ino~N:r,WI....-MTITTH,..,,TnHTIEr-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~GEOiiO-.~~~G~I~C-AL~~$~0~R~VE~-Y~~~~~~~~~~~~~~~~~~~~~~~~~t~DAH~O£....ltA~T~E~RL-JJA~O~M~tNL.DUiuS~T~R~A~~~ro~M11-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--,

-·- - - -- . n .>I C. I n "'"' I:. . fol ~q E D "" r: R 'IR r: o ,sn r: I

' i

• , _ • .,v- .. / - V.~.- r .y.-__ -...._ ,-.... - ·- . -,,., I

,..,._ .,. " ·' ' ,,cy _,.., ~-,_ _ ,_

... _ - - 1 ' - ' --- I

I I ~ I :! ' n- / / - - -- . _,, ,v __ --- -... I I

I ·~ I l'. - /,r / -~,~ - -. -..... J -- I ' I

- .- "-~ I - ... ,v, ... ~ ""___., - -- ,__ --- -- . - I ' '<°""" ' 51/ ll ., .. .,., ....... -~ ~ --,, __ -- I I ,, I .~ I ,.,, 1"'/// \ ~ .. ~--- - ~ -- - - I I I

i ' I I 'll. I --~ // ,/.-' , -~- ' -- --... - I ,. I "'·'" - --I \ ! ' I ' '/nv// - ---. ' i I l ' ' ,, ,• / / - ' ' - ---- I I

I -- - , - ~ ---. ---LJ - I I ':! . ,/ I - ' -... ' I '\~ I I I . , ' .-, / .... .-, . I ---. ' " l ,_

' I I \" I I I \ \ ' -// r<w I -, I ' \ ' ' '· I I

I ,_ ' I -- " / I I ' I \ '\ '\ i

,-::. I I -- ' Kl .. I ' ' I I';, I - I I ... " I ... , J I I \ I \ ' I

I I I ' <ti ', ., / I I \ '\ I I

' ·, I " V I ,- ( I I \ \ I

' ,\ I ft\ ~ - , ' ' ' I \ I I ' I I ,, A I• I '\ ' / I J I \ ' j I I

I I I, I ,j \ .... I I , j I I

'\ I I I I / ' ' I I I I

' - - - . - - ~·c;.· = - - . . , I I n.::, c.. . "~LC.. I I / I ' / •-··rc;._.,.;o _ _ .,. \,,V I I " F~EMO>, T CO I I I I _,

' 'I I ' .., " I I ._v J I

l '· I J. I " I I I I I .... /l I I ' , , J> I ('\ I , i \ I I 7/ I ... I - A' I I (\' ) I I / I

I ts i~ I \ I /,.., " I 0 I A\J .... I I ..... f / f l / I

I . ' ....... ·· "to /1 A I: I '\ I "-" I I .. -v , I / I I . , . ... l, ' . I I I ~,,, '

,,.. , , , r I : I I , I II I '\ I / A, I I r I

·, I '\ I .'J '\ I I ... v I / I I

I '\ ' - , I >' r ' I I .. ., I I / I

' ., • ./ I , -· ........ - -~ - . - .~ --~ . - I ·- " ' .... .,.,. ~,ATION I '\'- uu ....... .., I ' • ~ I J \ I I A ~ - \ -- I I

I . \ I ~- - ·1 I \ ,. I I """ ··" I '\ - I , ... """'It• / ' ~ - - -. I . \ I .. ... ••< ··-- I ~ ' I '\ .. \ r .n .: --;... ' . I . \ I ..... - -, ' I I ,.. '\ l'.1 • \ " ... - r

,-~ 0 .... --- •a r,, - - I . I II .. ... " " ', I - n.:..: - ;;. '\ \ a: '"~"' '" . '\ ~ p \ , , I

' ' , .... ..... ' " - ' ' \ ~ "'4An1 -~ \ .... ... ... 4810 -I \ I : , ' -, , , - • / I '\ \ ... '\ I .• , v \ ,,

I I ' I ., , .. . , / .,, ...., '\ '\ :; '\ ~, L A I' - ' I

I I . I /. ... r, A r, ' , ..... ~ ·- /., [ ' '\ I Al. / nc ~ I .... - the water t able i , ... _ __.__ .... n . .... ' ,. " -- ' \ ' ,

I . , .. - _, - = ,<. ,.o•· , / '\ ' I / / I " - r- , I I cont.our 1.nterva .1 reet ' I I . ., , ..... 1-u,f'V - I / " ' ' - , , A ' - . !.8--WMU\ 888 l.eve l I

r I . ~ I V N '

__, , A \ \ ' I / r I I I

·a-contourlrshown between 4570 ml 4770 :teet I ~ I ,, ' ' - I ., I

I , .. ..... - 6 I /, I ' I \ I \I / ,., ,, I

I ., er;; .. ---. ,-u- ' / . I I I I ,. / u ..... !,, : ___ ours compiled from Ba:rracl oug,, I

T i:::. ._ii I .,, / I'• ... "J /I> I / ,I I ' I / / J ~-· ' I .,

' , - , , ,

~ ' - , .. , .. - , .... ., . I ....,... I - ;/ , / I I I / ,_ I/ ·- F ,-:. / ; ':':::"~hwai~uA<ior-f-f-,--a.ed-wal~-9+-0 '

I I ,. A ,;_/LJ /V/ ...... ....... ( - / , I \ I I ... ~ ... J J '" I I

; I J ~ ~ ,r - , - I \ " ,r \ \ I J I / I /\ ,. . ,. ,. ' , g ·- . ._ .. , . O\,U, a IA::.u• J I i

- ., ' .... ' I \ \ . , I , ,/ , ., -r <::~ ~- '·· • t..., : _ ..

L_ - .... .. - .. ' \ ...... ' y - I I A ,v ./ I - -/, ....... I - ' ' / \. \ ( / J I / , ;' I " . . .. - . ' :-Surve, I -,-~ .,.. , ' '

~ ' , , ,/ I ,/ -·· -- '" · W• ~• . I

..., ··-· I . i , I .,, - I , , I ..... " .... 0 '( , ' L ft' / ! / / , I i . ' .,, / , , .... "' ' -- "'

,., " • '

, ., , , • ao-c &l l ad Ml.id t.ake- Mar~e t t.&kt-~-, ,,. ,~~u / ,/ 1 / I " '\" " ' LU~< V/ " .. ~ ,:.:· I I .w J ,< I I - --~ - ~ ........ <J .. _m_ L~fy-betwven-ttrn-,-40• and I

' / - ! / / - , , ' ' r,,, ·- /0 LJ,-- '/ , .. , - I - '\ I . ~ (\ c..- I I

I - ~-~- I ..... /, .... ' ' -- ' ., .' ' - ........._ , I ":. ·' .... ) I ;' .vi· . 'i'I I I rn- 4 rAn - -r --. a.. ·- I - ---o , • ! i L - " / ' , .- ,'ff'>/ ' ..... , -~ .... ·- " ._v ,,. I

I , -- I A " I . ,_ p _ , _ -... ~, , , " r •~ " I I I I - ,Httitt~tln

I ,, .,..__ - I P . '( -- -~- " ___ , /

b _.,. / I I I

r \ r l',.. ./ I I - .. ' / u: -, ' n- - -:;;,.r c' ... \ ,<:. I / I :::-pi:oxima te poai tion of tran-.J..t.t<»-aon• - - I '

,. " " JI\\_,.,,, ..... .. I

j / ' " " L" I I -..i ' ', / ' '\ ~ - ...., ' C '\ ... uom-&1edlmentaty•basa l t aaque nc, to •

. ~ - - " .... / .'\ \ I - I '\ -.- \ I P,,ag A .. - -- ••---- I

I .... ...... ...... ' " '" ' .. ' ' .... "' I

' - - - -- . - - ..... " " V ,. ' ' - ' ' I ·/ -- I --..:: '" .. -- "\ ' V/ '\ I ff '\ ' I ""- I 'I

' ...._ '- -~- '\ '\ , I II .. A ' \ ':.. l J~ ........... i~ I I I

I ... l I ...... r ' ' ' ., y / \ II "" >,, ' '\ '"' ""'-"'"' . ' i

- ,, I ' I ...._

' ...... " ' ,,

' , ,

" ' .., <aav ·- .

•1 - , I I ... ""' I " ' \ \ , \ \ I I '),, ' '\ '\ \ -~ .... I I I

l ... , I I ·- ·- " '\ \ \ .\ \ J I A ' ' ' '\ •o " I I

I A• j I -o- .,.,_ " '\ \ \ .I \ I "'- ' ' I '\ ' ,._. • -, I I

I ..... - ' ' ' ' I ..,. , " " . ' ' I / .;· "· I ....... ...... ' ' '\ \ \ ,.., \ -- _,,

' ' ' ' ' I I I

I I . ~ I I ,r ---.,.,._ ·- .,

' ' \ \ \ A \ " .. ' 1. I I I n -' t'. I N:. :,~ ,.. -- - _..__... ___ - -'- - ' " - . I " - -- - - ------.... . u -- ' 1t:Vh.Lt. l ... ' ' ~v ... ""'·"-· .... w

."'>I ' I '- I ' ' ' \ I \_\ ' ' \

' I I "" ' ' \ l I L\ I '\ I

I .I I "- ~ '\ \ \ \ I . \ ' ' r I I ..,, I .... " ' ., I - , I

v I '- .. ' '\ I I I I , ... \ -· .......... '\ . I I -· I X ' '\ I I I , .... \ - .. .,,

" I I I

I .... I ..... I " '\ I \ I I \ - _,. y - I i . ' ' ~ ' .... " ' ':,, . / . ,, •••• 1 •••••• ' ' ' I 1 1 I I I / ,r I I

I .. l ' ' \ I I \ . \ I . I I I

I I " ' '\ I \ I ;, r I I I

-- . " '\ \ I ,.; I .\ II I I \ ...... I I

I '\ \ I I ' .., I' I I '\ ' I

I " \ \ .,

\ I II I ~ \

" ' ' - \l ~, 4?10~!) -4 I ' ' \ I ,-, \ "I I I ../ l \ I .. - .. , I I ' '\ I ' \ I ' I I'\ r- I . - '' I I I '\ \ I ,,.u..,u rn ; l ! \ . I

I I ' " I ' ' . I ' I ' '\ I JI .:ti I " '\ I

I I ' \ I I // ., I I "•• I I

i l I ' \ { I ff . I I I

• \ ' I \ ;:; I . -- --- ~ . r I

R '\I,: I • ... o ...... • ·1'10,•' ---· ·- ~ I

11~!1:f . . ..

I

I :kt'l1• from us Gto•tq,cal S ·r t ·,- i '>!)Q ooc 0 2 " !i ;i u ·~ "110'5 81f1t IR ha !I hu IA,a l i ilO Q[ !1111 1 I ' I I I I I I j I

I

A 0

5100'- ..0 0

ID

50od-I

l,J 0

"' i 2

4800'-oO' l:t

4600'-

ONITEO STA?ES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

.. .. > ir .; 0 _, <> m

,._

~

4400'-

4000°-

3800'- ~

36001

-

PREPARED IN COOPERATION WITH THE

I DAl:fO, DEPARTMENT OF WATER ADMINISTRATION

l~pproxlmote downgrodleOI eitlenl of "boqler " effect

"O ... 0

if~ ~.1 ... en en .. i :X:z I ID_

lo!,

l ,..

/1.. ;; 'ii;

0

:ii 0 I

"' ..0 (\j

i ~ 0 I

' "' 0 I LIJ V z ,_ :?l '

,-.

;~ l<l I z ID

~i'J I ~ """" ·.; ~- ---- .... •" _.,.,.

-

-

-

34001

- ~ 3300'--'--==~~~~~~-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~---,-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-'-

<;i;:- r.TI ON 11 - !1'

4900'

420

I l\pproi1 Imo 1e downgrod!eol eir ten& of "barrier'' effect ---;; .0 ,.. I

l&J V ..., I

z ID

u u u ,.. T l,J <t fl) i z IIO

EXPLANATION

E5:2I CD llaaalt Sand

rave era

D Silt end c.lay

§ S1lic1c volcan.1,c rocks

ApproxJ.ma~• position of regional water table

\late1: level

~

-in piezometer Piuometer

_)-foot acru ri in piezo111eter

., I I I

( j

4800'

4600'

4400'

'\200'

(I.I I

II.I It)

Bar tndicetea water level 40od wbHi vel.l. drilled to depth of dot

T UJ Ill

T z <t

I ''b .. Approltimole do,,.ngrodaenl extent of orner e ffect

u 0 "O

I l,J

CD ..., I z <t

0 'O .0 (\j

I l,J ID ,., I

;z tl'I

u 0 en

(\j I

t..l .... I") I z ID

0 .0 0

c'

3800' 3800'

3700'_._~~~~~~~--~~~~~~--,-~~~~~~~~~~~~--'-

SECTION 8-8' Verl!col exo~ rolion x 52.8

Do 1um is meo11 seo lev~ I

37oo·~-----------------------S_,E,,...C:-::r=1-=o..,..N.,..-C=----c=--------------------_._ Re/et 10 f19 6 for loco11or ol secl1on&

FIGURE 4.-- Geologic sections ,n the Mud Lake region, Idaho .

UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

l r: l" r:· h f'. 1·

------~-f GUBE 5~--

PREPARED IN COOPERATION WITH THE

IDAHO DEPARTMENT OF WATER ADMINISTRATION

St • · , 1,, 1 d1100,l1s

IIN •.J(i(-~

Lo•• to:alt

~ 80~011 of M.io Lok•

I .· .. ·. -J Eo,1, bosott

ence d1Wl am sho.w1na tb.e_ __ suJtsurface aeoloav 1n the Muri o k P. rP. n Ion . I rl n h n

9N-4)E-~

...

T 10 I\

T G N

we

T ll N

UNITED STAT&S DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY

--------

I

.... c,,

0

0 .. ~

I

TESTING

R.31 E.

Geology Mopoed

PREPARED IN COOPERATION WITH THE IDAHO DEPARTMENT OF WATER ADMINISTRATION

43o30 I T '"L ____ __,,.._i __________ I----'---.----___.___-~~~~-------.. -~

R 31 E 11-10,0' 112:"1$' 112"00' R 41 E

112"451

B04• lrOM us c .01~,col s .... , t'Z!'>O,OOO O Z ~ 6 8 IC 12 MILES

1,1049i•

NoU· G•i,1097 from CtOt,tf\wc,tt ond Olhlft 09701 Ond from

unpublr•l\td ll'OP O'J Pl! Sltvtn•

FIGURE 6 .--Generolized geolog i c map of the Mud Lake reg i on, Idaho.

5ed.l .. n,ary Copoolt• Q&lJ p1•Y•• el hiv1ua, 9lac1al, a lluYUl tan1. &Ad f&J19l-rat• Qtl, l~• bod• of 'terreto11 o., lal<AI bed.a ot MArltn .Laite

Fault

A-----A'

L.111<1 of ir•olO¥lc 1ect lon (ret.r to tl9. 4)

• .,..., ln 9col091c 1ec:t1on.

, ... it.

Ol, ltt:AI boa.t O.l1 loaoa.lt o' X>ld !.ake QU>1 bault o: I.one lluU~ 019: banlt d w.ul• oruar •~•••

IEE] ..... ttlC: tu.ff

~ stUcle ,01canlc rock•

lncludea ,_ aldl•o11t1«y bed•

~ ledl-uiry roe1lo •

undi &terent.t.•t~

2cc:

4

"' ~ .. ~

"' 0

i .. 't 0 ;:j Ill .. .., I::' t;f)t

; ,:

:. :!::

1000

1100

ut:11~1,I) 5';ATES DISPJIMNIIWr 4p THE rNTERIOR

GEOLOCIC.U. SOR\ogy

3N •Z6E ~ obOI

<:ONSTRUCTIOH CAJ.•PEfl LOG DIAGRAM OAILL£RS LOG

-··

RA!)1AT10I\I INTE'ISIT'I' il"flEASES

6 I<, 14 18 Z2

I .. ~1' .. f -H· =<111 -·.

:,~..;._l\ 'I

! : I I I I 'I

I I . I I . I I I I I I I I I

I f: I I i I

·H ' ' I I

I : It I I I I

I: I I I I : l I ' ' ' I I I

I I I

I I I I I I I I I I

'

20-"'<~ (Ol"(J 10 :)87 ... ,

20·,~h

"°'' 101119 , .. ,

,,d c01o,nq 10 970

••••

••• 4•,nc:h

"°'" 10 1075 r,,,

Ptotched ...«1tt• ••••I

R•q\Onol •ot•t 1•Y11

'..O ,-.::o.o. '-'ObOOlt' bcrl,011

Ho ,~. CWObO~Y Des.an

To101 dtr,t• 1075 lttl

200

600

800

1000

1100

ll'Al>IAflON '1T(NS1TY

IIICREASfS

10 14 '' l2 .!6

E•Pl.ANUtO'<

EXPLAN~TION

ElCPl.A~A'flOtl

EJCPLA!,A"ON

(XPLANATIO'<

Poe,., ,41 ,o-rn 121 ~ ,._,1 to n• 5 r111

, ..... It

1010$} ... , "'•"C~ P•P•

petlotor,d ,,.~'" 1030 Ifft tot0~1 ,.,,,

PR!PARl!l> IM COOPIRAT10ll Ml TU Tllll

IDAHO Dl?P.ARfto!EllT OP WATIITTI ADMl HISTAATlON

Rtq1onot "°''' ftwtJ

lo•o, GtPI~ 10$l fttl

OAl,'MA LOC 0

•S •21(• 140CCI CONSTRuCTION

CALIPER LOG OtAI\RAM ORILt.tRS LOG

I I I I I I

8•,n,ch .... 109&8 1111

j ~ 4•tntt, I to,1119 I lO IOll I Int I

"i'l'w:;11''*!• 10 IO)f fttl

r»\'!1:1:v~ •·;;c,~r·· 1100..__•~N~C~R~E~4;S=ES=-,__.__.__.__._.._.._....,__.__.__.~~~~~~I~•-'~~~~ -

•

SS •28E •2r.bl>dl

CONSTIIUCTION C41.tPfR I.OG OIAGII A~

4·J~t\ CCt.;n9 10 76l$ , ...

J:f!"910f"CI 'tlll'Clef •ew•I

;,~·•• ••o•• 761.5 teo1