APPENDIX A Site Characteristics for Selected USGS Gage ... · Site Characteristics for Selected USGS Gage Stations in the Piedmont Physiographic ... the annual maximum series calculated

APPENDIX A

Site Characteristics for Selected USGS Gage Stations in thePiedmont Physiographic Province

This Appendix provides summaries of field data collected by the U.S. Fish and Wildlife Service(Service) at twenty-three U.S. Geological Survey (USGS) gage station monitored stream sites inthe Piedmont hydro-physiographic region of Maryland. Survey methods are presented inAppendix B Protocols for field surveys at gage stations.

Of the twenty-three sites surveyed, eighteen stations were active at the time of the survey. Forthree sites (Basin Run at Liberty Grove, Baisman Run at Broadmoor, Slade Run near Glyndon,and Northeast Creek at Leslie), the USGS revised the existing rating table prior to survey work.At most sites, a study reach was surveyed up- or downstream of the gage station to meet siteselection criteria although in some cases, the gage reach is contained within the study reach.

For each site, information and survey data is summarized on four pages. The first page for eachsite contains general information on the drainage basin, gage station, and the study reach. TheMaryland State Highway Administration provided land use/land cover information using thesoftware program GIS Hydro (Ragan 1991) and 1994 Landsat and Spot coverages. Stream orderand magnitude are based on Strahler (1964) and Shreve (1967), respectively. The reporteddischarge recurrence intervals are from the log-Pearson type III flood frequency distribution forthe annual maximum series calculated by USGS according to the WRC Bulletin 17B procedures.The second page provides information on the study reach including cross-section plots andparticle size distributions in the riffle and reach. The third page shows photographic views of thesurveyed cross-section in the study reach and the fourth page provides a scale plan form diagramof the study reach mapped using a total station survey instrument and generated with the graphicand survey reduction software Terra model.

Interagency Advisory Committee on Water Data. 1982. Guidelines for determining flood flowfrequency. Water Resources Council Bulletin 17B, 28 pp.

Ragan, R. M. 1991. A geographic information system to support state-wide hydrologic andnonpoint pollution modeling. Department of Civil Engineering, University of Maryland, CollegePark, MD.

Shreve, R.L. 1967. Infinite topologically random channel networks. Journal of Geology, 75:178-86.

Strahler, A. N. 1964. Geology. Part II. Quantitative geomorphology of drainage basins andchannel networks, in Handbook of Applied Hydrology (Ed. V.T. Chow), pp. 4-39 to 4-76,McGraw-Hill, New York.

Table of Contents

Site Name Station Number PageBaisman Run at Broadmoor, MD #1583580 A-4Basin Run at Liberty Grove, MD #1579000 A-8Beaver Run near Finksburg, MD #1586210 A-12Beaverdam Run at Cockeysville, MD #1583600 A-16Bennett Creek at Park Mills, MD #1643500 A-20Big Elk Creek at Elk Mills, MD #1495000 A-24Big Pipe Creek at Bruceville, MD #1639500 A-28Cranberry Branch near Westminster, MD #1585500 A-32Deer Creek at Rocks, MD #1580000 A-36Hawlings River near Sandy Spring, MD #1591700 A-40Jones Falls at Sorrento, MD #1589440 A-44Little Falls at Blue Mount, MD #1582000 A-48Little Patuxent River at Guilford, MD #1593500 A-52Long Green Creek at Glen Arm, MD #1584050 A-56Morgan Run at Louisville, MD #1586610 A-60Northeast Creek at Leslie, MD #1496000 A-64NW Br Anacostia River near Colesville, MD #1650500 A-68Patuxent River near Unity, MD #1591000 A-72Piney Creek at Taneytown, MD #1639140 A-74Seneca Creek at Dawsonville, MD #1645000 A-78Slade Run near Glyndon, MD #1583000 A-82Western Run at Western Run, MD #1583500 A-86Winters Run near Benson, MD #1581700 A-90

BAISMAN RUN AT BROADMOOR, MDUSGS STATION NUMBER: 1583580

Latitude:Longitude:ADC Map Coordinates:

Drainage Area (sq. mi.):Stream Order / Magnitude:Percent Imperviousness:

39º 28' 45”76º 40' 42"Baltimore / 1993Map 18 / C51.472 / 24.25

Gage Period of Record:

Mean Annual Discharge (cfs):Rosgen Stream Type:Survey Date:

1964 – 19691970 – 19761999 - Present1.85C4Oct. 1998

Land Use (%): Residential: 16.98 Agricultural: 4.72 Forest: 75.47 Commercial: 0.00

Log-Pearson Flood Frequency Discharge (cfs):(Log-Pearson Period: 1965 – 1976, 1999)

Q1.005: 4.8 (sys) Q1.5: 96.00 Q2.0: 136.70

General Study Reach Description: The study reach and gage reach are the same and located at atemporary gage location downstream while the bridge was under construction. The reach haspool/riffle morphology, a regular meander pattern with minor depositional features and somelateral scour, and appears vertically stable. The upstream end of the reach is ditched, and thelower end lies within a former backwater zone of a now destroyed dam or weir that can be seendownstream of the study reach. There are no large woody debris or boulders in the reach. Thebank vegetation is mostly grass, with a few scattered trees and a bamboo stand at thedownstream limit of the study reach. Floodplain vegetation is also mostly grass, with a lawn onthe right and a pasture on the left.

DISCHARGE BASED ON SURVEY OF GEOMORPHIC FEATURES

Bankfull Discharge (Qbkf cfs):Bankfull Return Interval (R.I.):Gage Height (ft):Qbkf / Q1.5:

114.501.553.131.19

Qbkf / Q2.0:QTop of Bank(cfs):QActive Channel (cfs):

0.84357.50n/a

R.I.: 7.30R.I.: n/a

STUDY REACH SURVEY INFORMATION

Average Water Surface Slope (ft/ft):Manning’s “n”:Mean Bankfull Velocity (ft/sec):u/u*:R/D84:Froude Number:

0.01600.0693.664.112.540.50

Flood-prone Width (ft):Entrenchment Ratio:Width/Depth Ratio:Channel Sinuosity:Beltwidth:Meander Width Ratio:

458.0024.2311.391.29844.4

BAISMAN RUN AT BROADMOOR, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)

sand gravel cobble boulder bedrocksilt/clay

Reach Average Riffle - - - - -

F i n e r T h a n R e a c h R i f f l eD 1 6 0 .1 1 0 .4 9D 3 5 1 .3 4 6 .6 0D 5 0 9 .4 7 1 8 .4 9D 8 4 1 6 0 .0 5 1 8 4 .8 7D 9 5 3 1 4 .6 0 3 3 6 .5 9

P a r t i c l e S i z e ( m m )

STUDY REACH CROSS SECTION

-10

0

10

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)

Bed Surface Bankfull Water Surface

Bankfull Width (ft):Bankfull Cross-sectional Area (ft2):Hydraulic Radius (ft):

18.9031.321.54

Mean Bankfull Depth (ft):Maximum Bankfull Depth (ft):Wetted Perimeter (ft):

1.662.7720.34

Right bank of classification cross-section

Downstream view of classification cross-section

Baisman Run at Broadmoor, Maryland

Baisman Run at Broadmoor

BASIN RUN AT LIBERTY GROVE, MDUSGS STATION NUMBER: 1579000



39º 39' 30"76º 06' 10"Cecil / 1989Map 3 / B125.313 / 96.79



1948 - 19581965 - 19766.74C4Oct. 1998


Log-Pearson Flood Frequency Discharge (cfs):(Log-Pearson Period: 1949 - 1976)

Q1.005: 155.60 Q1.5: 580.00 Q2.0: 808.70

General Study Reach Description: The study reach and the gage reach are the same. Thechannel exhibits pool/riffle morphology, a regular meander pattern with well-vegetated pointbars and some lateral scour, and appears vertically stable. A cut-off channel at one meander hasproduced a mid-channel island, and another meander has been stabilized with rubble. Theoverall particle distribution is bi-modal sand and gravel. There are no pieces of large woodydebris or boulders in the channel. The reach is in a pasture, and cattle have unrestricted access tothe stream. The bank and floodplain vegetation is pasture grass and scattered trees, mostlysycamores.



613.921.553.551.06


0.761179.50n/a

R.I.: 3.20R.I.: n/a



0.00590.0506.345.823.770.81


360.007.0427.041.40961.9

BASIN RUN AT LIBERTY GROVE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .1 6 8 .4 2D 3 5 0 .2 4 3 7 .2 5D 5 0 1 0 .3 1 5 9 .8 9D 8 4 1 1 2 .4 6 1 5 0 .5 4D 9 5 1 8 6 .8 8 2 3 2 .5 9



0

10

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)



51.1196.831.86


1.893.1151.96


Upstream view of classification cross-section

Basin Run at Liberty Grove, Maryland

Basin Run at Liberty Grove

BEAVER RUN NEAR FINKSBURG, MDUSGS STATION NUMBER: 1586210



39o 29' 22"76o 54' 12"Carroll / 1994Map 26 / A714.003 / 308.59

Gage Period of Record:Mean Annual Discharge (cfs):Rosgen Stream Type:Survey Dates

1982 - Present16.60C4/1Oct. 1997Sept. 1998



Q1.005: 151.80 Q1.5: 520.00 Q2.0: 733.20

General Study Reach Description: The downstream end of the study reach is 220 feet upstreamof the gage. The study reach has pool/riffle features, a regular meander pattern controlled bybedrock with some gabion/rip-rap revetment along the road on a portion of the right bank. Thereach exhibits a bi-modal distribution of gravel and bedrock with point- and side-bar depositionalfeatures, some lateral scour, and is vertically stable. The reach contains several pieces of largewoody debris, one of which spans the channel, and numerous boulders. The bank vegetation iscomprised of trees and sparse grass, while the floodplain vegetation is moderately dense forest ofhickory, ash, tulip poplar, beech and oak, with a moderately dense understory of spice bush,witch hazel, and rhododendron.



626.901.733.611.21


0.86n/an/a

R.I.: n/aR.I.: n/a



0.00500.0325.939.4111.040.65


126.403.1315.491.06872.2

BEAVER RUN NEAR FINKSBURG, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .3 5 1 .9 4D 3 5 1 4 .5 4 1 0 .9 5D 5 0 3 6 .6 3 1 9 .1 6D 8 4 3 3 5 .4 5 6 8 .2 9D 9 5 B e d r o c k 1 6 1 .0 6



0

10

20

-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Distance (ft)

Ele

vatio

n (f

t)



40.43105.692.47

Bankfull Depth (ft):Maximum Bankfull Depth (ft):Wetted Perimeter (ft):

2.613.2042.74

Left bank of classification cross-section


Beaver Run near Finksburg, Maryland

Beaver Run near Finksburg

BEAVERDAM RUN AT COCKEYSVILLE, MDUSGS STATION NUMBER: 1583600



39o 29' 13"76o 38' 42"Baltimore / 1993Map 18 / G-H 420.903 / 1619.28

Gage Period of Record:Mean Annual Discharge (cfs):Rosgen Stream Type:Survey Dates:

1982 - Present30.50C5/1c-Oct. 1997Nov. 1998



Q1.005: 341.80 Q1.5: 800.00 Q2.0: 997.60

General Study Reach Description: The upstream end of the study reach is 600 feet downstreamof the gage. The reach has pool/riffle features, a meander pattern that may have beenstraightened in the past and is partially controlled by bedrock, point- and side-bar depositionalfeatures, some lateral scour, and appears vertically stable. There are several pieces of largewoody debris, two of which extend at least to mid-channel, and several boulders. The bank andfloodplain vegetation consists of moderately dense young forest of ash, red maple, and sycamore,with a low-density understory of saplings and shrubs.



662.501.265.150.83


0.66980.30n/a

R.I.: 2.00R.I.: n/a



0.00080.0234.0914.1080.010.37


463.5010.7311.521.13952.2

BEAVERDAM RUN AT COCKEYSVILLE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 0 .1 6D 3 5 0 .3 1 0 .6 6D 5 0 0 .6 3 1 .6 2D 8 4 6 .3 6 1 2 .8 9D 9 5 2 7 .7 1 2 4 .0 0



80

90

100

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)



43.20161.983.38

Bankfull Depth (ft):Maximum Bankfull Depth (ft):Wetted Perimeter (ft):

3.754.6947.87



Beaverdam Run at Cockeysville, Maryland

Beaverdam Run at Cockeysville

BENNETT CREEK AT PARK MILLS, MDUSGS STATION NUMBER: 1643500



39o 17' 40"77o 24' 30"Frederick / 1992Map 45 / F - G262.805 / 1223.48


Mean Annual Discharge (cfs):Rosgen Stream Type:Survey Dates:

1948 – 19581966 - Present70.70C4/1Nov. 1997Feb. 1999


Log-Pearson Flood Frequency Discharge (cfs):(Log-Pearson Period: 1949 – 1995)

Q1.005: 783.40 Q1.5: 1800.00 Q2.0: 2312.30

General Study Reach Description: The downstream end of the study reach is 1,624 feet upstreamof the gage, because the intervening section is a highly uniform run that may have beenchannelized in the past. The study reach channel has pool/riffle features, a fairly straight,bedrock-controlled, meander pattern with point- and side-bar depositional features, some lateralscour, and appears vertically stable. There are a few pieces of large woody debris along thebanks of one riffle, and several large boulders are scattered throughout the reach. The bank andfloodplain vegetation is moderately dense forest, consisting of beech, hemlock, oak andsycamore, with a low-density understory of saplings, spice bush, and mountain laurel.



1867.001.556.281.04


0.81n/a214.80

R.I.: n/aR.I.: <1.005



0.00190.0384.698.8516.360.38


271.003.2617.411.111611.9

BENNETT CREEK AT PARK MILLS, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 7 .6 6D 3 5 4 .0 0 1 9 .1 1D 5 0 1 6 .9 5 3 3 .9 1D 8 4 1 2 8 .0 0 8 4 .5 1D 9 5 B e d r o c k 1 2 4 .9 7



80

90

100

0 10 20 30 40 50 60 70 80 90 100

Distance (ft)

Ele

vatio

n (f

t)



83.20398.034.54


4.786.3787.76

Bennett Creek at Park Mills, Maryland


Left bank of classification cross-sectionBennett Creek at Park Mills

BIG ELK CREEK AT ELK MILLS, MDUSGS STATION NUMBER: 1495000



39o 39' 26"75o 49' 20"Cecil / 1989Map 7 / C - D1252.604 / 674.05


1932 - Present69.40C4/1Sept. 1997Aug. 2000


Log-Pearson Flood Frequency Discharge (cfs):(Log-Pearson Period: 1984 – 2000)

Q1.005: 723.50 Q1.5: 2200.00 Q2.0: 2883.00

General Study Reach Description: The upstream end of the study reach is 481 feet downstreamof the gage, because the intervening reach is an atypically long and steep riffle. The study reachhas pool/riffle features, a straight meander pattern with sidebars and low lateral scour. An activequarry operation on the left floodplain may have altered the channel alignment. Large woodydebris is negligible, but large boulders are distributed through the reach. The vegetation on bothbanks is moderately dense forest, consisting of sycamore, red maple, alder and willow, with adense understory of blackberry and multiflora rose. The quarry encroaches on the leftfloodplain, while the right floodplain is old field.



2099.001.456.100.95


0.735178.00742.30

R.I.: 5.50R.I.: 1.01



0.00140.0586.145.685.500.52


407.005.2517.571.042102.7

BIG ELK CREEK AT ELK MILLS, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)






80

90

100

-10 0 10 20 30 40 50 60 70 80 90 100 110

Distance (ft)

Ele

vatio

n (f

t)



77.50341.704.04


4.415.9784.63



Big Elk Creek at Elk Mills, Maryland

Big Elk Creek at Elk Mills

BIG PIPE CREEK AT BRUCEVILLE, MDUSGS STATION NUMBER: 1639500



39o 36' 45"77o 14' 10"Carroll / 1994Map 9 / A 10-11102.004 / 1703.54


1947 - Present115.00C4/1Nov. 1997Feb. 1999



Q1.005: 1327.60 Q1.5: 2600.00 Q2.0: 3266.00

General Study Reach Description: The upstream end of the study reach is 244 feet downstreamof the gage. The channel has pool/riffle features, a bedrock-controlled meander pattern, point-and side-bar depositional features, some lateral scour, and is stabilized vertically by bedrockoutcrops. There are several pieces of large woody debris distributed through the reach, onespans the full channel width. Numerous boulders occur in the lower third of the reach. The bankvegetation is moderately dense trees consisting of sycamore, red maple and oak, while thefloodplain vegetation is a mix of pasture, cropland, and moderately dense forest with a low-density understory of shrubs and saplings.



2658.001.557.201.02


0.81n/a1945.00

R.I.: n/aR.I.: 1.15



0.00130.0335.1210.677.960.37


318.003.6914.321.456257.3

BIG PIPE CREEK AT BRUCEVILLE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 6 .2 3D 3 5 8 .4 8 3 9 .1 9D 5 0 2 0 .1 7 6 2 .4 8D 8 4 1 6 7 .7 3 2 1 0 .5 1D 9 5 B e d r o c k 3 4 3 .1 0



80

90

100

0 10 20 30 40 50 60 70 80 90 100

Distance (ft)

Ele

vatio

n (f

t)



86.20518.655.49


6.027.2794.39



Big Pipe Creek at Bruceville, Maryland

Big Pipe Creek at Bruceville

CRANBERRY BRANCH NEAR WESTMINSTER, MDUSGS STATION NUMBER: 1585500



39o 35' 35"76o 58' 05"Carroll / 1994Map 20 / A13.402 / 65.27


1949 - Present3.31C4Oct. 1997Sept. 1998



Q1.005: 30.20 Q1.5: 150.00 Q2.0: 234.30

General Study Reach Description: The downstream end of the study reach is 137 feet upstreamof the gage, because of ponding at the gage. The reach has pool/riffle features, a regularmeander pattern, point-bar depositional features, some lateral scour, and appears verticallystable. There are numerous pieces of large woody debris throughout the reach, with severalspanning the entire width. The reach is located in a pasture, and livestock have unrestrictedaccess to the stream. The bank and floodplain vegetation is pasture with scattered trees, mostlywillow and box elder. Upstream and downstream of the study reach the channel appearsstraightened.



162.401.573.201.08


0.69589.2037.06

R.I.: 5.40R.I.: 1.02



0.00610.0295.229.6721.770.72


340.0017.7911.721.60804.2

CRANBERRY BRANCH NEAR WESTMINSTER, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 1 .0 0D 3 5 n / a 6 .2 9D 5 0 4 .0 0 9 .0 8D 8 4 2 2 .7 4 2 0 .4 1D 9 5 4 1 .9 3 3 9 .1 9



0

5

10

0 5 10 15 20 25

Distance (ft)

Ele

vatio

n (f

t)



19.1131.131.46


1.632.5621.35



Cranberry Branch near Westminster, Maryland

Cranberry Branch near Westminster

DEER CREEK AT ROCKS, MDUSGS STATION NUMBER: 1580000



39o 37' 49"76o 24' 13"Harford / 1992Map 9 / H494.404 / 992.88

Gage Period of Record:Mean Annual Discharge (cfs):Rosgen Stream Type:Survey Date:

1926 - Present126.00B4/1cSept. 1997July 1998



Q1.005: 1162.00 Q1.5: 2850.00 Q2.0: 3613.80

General Study Reach Description: The study reach and the gage reach are the same. The reachhas pool/riffle features, a fairly straight, bedrock-controlled meander pattern, poorly developedpoint- and sidebar depositional features, some lateral scour, and appears vertically stable withbedrock outcrops in the bed. There are several pieces of large woody debris, with one spanningthe channel, and numerous boulders throughout the reach. At the upstream end of the reach, thechannel is confined by a pair of old railroad bridge abutments. The bank vegetation is a mix ofgrass and moderately dense mature forest (hemlock, white pine, oak), with a moderately denseunderstory of mountain laurel.



2614.001.376.990.92


0.723500.00605.00

R.I.: 1.90R.I.:<1.005



0.00210.0335.5210.2227.940.45


163.001.6121.541.225005.0

DEER CREEK AT ROCKS, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a n / aD 3 5 4 .3 4 4 .6 8D 5 0 1 9 .0 4 2 0 .2 2D 8 4 3 3 5 .4 5 4 7 .9 1D 9 5 B e d r o c k 8 9 .1 2



80

90

100

0 10 20 30 40 50 60 70 80 90 100 110 120 130

Distance (ft)

Ele

vatio

n (f

t)



101.00473.674.39


4.695.58107.86



Deer Creek at Rocks, Maryland

Deer Creek at Rocks

HAWLINGS RIVER NEAR SANDY SPRING, MDUSGS STATION NUMBER: 1591700



39o 10' 29"77o 01' 22"Montgomery / 1998Map 22 / B327.004 / 506.86


1978 - Present30.70C5Oct. 1997Jan. 1999


Log-Pearson Flood Frequency Discharge (cfs):(Log Pearson Period: 1979 - 1998)

Q1.005: 185.40 Q1.5: 940.00 Q2.0: 1352.00

General Study Reach Description: The upstream end of the study reach is 638 feet downstream ofthe gage because the intervening riffle is unusually long and steep. The reach has pool/rifflefeatures, a regular meander pattern with point-bar depositional features, some lateral scour, andappears vertically stable. There are numerous pieces of large woody debris, with several spanningthe channel, resulting in one mid-channel bar. There is one bedrock outcrop. The bank vegetationis moderately dense forest, consisting of red maple and sycamore, with a moderately dense under-story of multiflora rose. The floodplain vegetation is a mix of forest and old-field, the latterpredominantly multiflora rose.



1030.001.605.381.10


0.761168.00n/a

R.I.: 1.75R.I.: n/a



0.00220.0295.7411.2531.140.51


635.0014.1711.201.191022.3

HAWLINGS RIVER NEAR SANDY SPRING, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 0 .1 3D 3 5 0 .1 4 6 .0 0D 5 0 0 .3 6 1 2 .7 1D 8 4 3 2 .0 0 3 6 .4 3D 9 5 5 9 .5 6 5 9 .5 6



80

90

100

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)



44.80179.313.72


4.004.7448.21



Hawlings River near Sandy Springs, Maryland

Hawlings River near Sandy Spring

JONES FALLS AT SORRENTO, MDUSGS STATION NUMBER: 1589440



39o 23' 30"76o 39' 42"Baltimore / 1993Map 26 / E7-825.203 / 2521.43



1966 – 19881996 - Present32.50C4Oct. 1998Jan. 1999



Q1.005: 250.60 Q1.5: 840.00 Q2.0: 1190.00

General Study Reach Description: The study reach and gage reach are the same. The reach haspool/riffle features, a straight meander pattern with point- and side-bar depositional features, andsome lateral scour. A sanitary sewer pipe has been exposed downstream of the gage. Thechannel appears altered and may have been straightened in the past due to construction of FallsRoad. The bank and floodplain vegetation is moderately dense mature forest with a moderatelydense understory of sapling trees and shrubs.



914.701.577.321.09


0.771137.00581.60

R.I.: 2.00R.I.: 1.20



0.00160.0274.9312.0259.460.47


196.003.6315.741.13

1.9

JONES FALLS AT SORRENTO, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a n / aD 3 5 0 .1 1 0 .3 0D 5 0 0 .4 5 7 .7 0D 8 4 1 6 .9 1 1 7 .0 0D 9 5 6 2 .1 9 3 2 .0 0


The reach pebble count distribution is bi-modal (sand and gravel). The largest number of oberservations is in the gravel size class. The riffle pebble count D50 is gravel.


0

10

0 10 20 30 40 50 60 70 80 90 100

Distance (ft)

Ele

vatio

n (f

t)



54.00185.453.32


3.434.3655.92



Jones Falls at Sorrento, Maryland

Jones Falls at Sorrento

LITTLE FALLS AT BLUE MOUNT, MDUSGS STATION NUMBER: 1582000



39o 36' 16"76o 37' 16"Baltimore / 1993Map 8 / A852.904 / 682.77


1944 - Present68.60C4Oct. 1997Dec. 1998



Q1.005: 524.4 (sys) Q1.5: 1750.00 Q2.0: 2230.00

General Study Reach Description: The downstream end of the study reach is 450 feet upstreamof the gage because the intervening reach exhibits aggradation and lateral adjustment. The studyreach has pool/riffle features, a regular, bedrock-controlled meander pattern with point and sidebar depositional features, and some lateral scour. Several pieces of large woody debris are in thereach, but none span the channel, although one is causing some mid-channel aggradation througha riffle. The bank and floodplain vegetation is moderately dense forest, consisting of oak, redmaple and sycamore. The forest is mature on the right bank, but relatively young on the left.The understory on both sides is a low-density mix of sapling trees and shrubs. The channel isbordered on the left by a maintained trail on a railroad bed that crosses the channel at theupstream end and at the gage.



1674.001.455.470.96


0.753161.00851.10

R.I.: 4.00R.I.:1.03 (SYS)



0.00190.0364.999.4220.120.40


313.504.6113.791.092043.0

LITTLE FALLS AT BLUE MOUNT, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a n / aD 3 5 0 .0 8 1 .0 9D 5 0 1 .7 4 1 8 .7 3D 8 4 8 2 .9 6 7 0 .4 0D 9 5 1 9 2 . 0 0 1 0 8 . 8 2


The reach pebble count distribution is bi-modal (silt/clay and gravel). The largest number of oberservations is in the gravel size class. The riffle pebble count D50 is gravel.


80

90

100

-10 10 30 50 70 90 110

Distance (ft)

Ele

vatio

n (f

t)



68.00335.264.65


4.935.6072.16



Little Falls at Blue Mount, Maryland

Little Falls at Blue Mount

LITTLE PATUXENT RIVER AT GUILFORDUSGS STATION NUMBER: 1593500



39o 10' 04"76o 51' 07"Howard / 1992Map 19 / H-J238.004 / 9918.48


1932 - Present43.90E5Oct. 1997Dec. 1998Oct. 2000



Q1.005: 444.50 Q1.5: 1050.00 Q2.0: 1362.60

General Study Reach Description: The study reach and the gage reach are the same. The reachhas pool/riffle features, a regular meander pattern with few point bar depositional features,some lateral scour, and appears vertically stable. There are numerous pieces of large woodydebris in the middle of the reach, with several pieces extending well into the channel. Thelower end of the reach is stabilized on the right bank by boulder revetment associated withGuilford Road. The bank and floodplain vegetation is moderately dense forest, consisting ofgreen ash, red maple, oak and sycamore, with a moderately dense understory of sapling treesand shrubs.



1024.001.487.100.98


0.751435.00n/a

R.I.: 2.20R.I.: n/a


Average Bankfull Slope (ft/ft):Manning’s “n”:Mean Bankfull Velocity (ft/sec):u/u*:R/D84:Froude Number:

0.00050.0224.0815.11172.530.32


478.009.609.881.372665.3

LITTLE PATUXENT RIVER AT GUILFORDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .0 7 0 .1 6D 3 5 0 .3 7 0 .5 2D 5 0 0 .7 1 0 .7 1D 8 4 2 .0 0 8 .0 0D 9 5 1 2 .0 0 1 7 .7 1



0

10

20

-10 0 10 20 30 40 50 60 70 80 90

Distance (ft)

Ele

vatio

n (f

t)



49.80251.054.53


5.046.0855.44



Little Patuxent River at Guilford, Maryland

Little Patuxent River at Guilford

LONG GREEN CREEK AT GLEN ARM, MDUSGS STATION NUMBER: 1584050



39o 27' 17"76o 28' 45"Baltimore / 1993Map 21 / B-C109.403 / 1812.36


1975 - Present11.50C2/1Oct. 1997Feb. 1999Aug. 2000



Q1.005: 85.20 Q1.5: 460.00 Q2.0: 690.20

General Study Reach Description: The upstream end of the study reach is 507 feet downstreamof the gage. The reach has cascade features, a relatively straight boulder-controlled meanderpattern with no depositional features, and appears vertically stable. There is no large woodydebris, but large boulders are abundant and distributed throughout the reach. Upstream of theprivate road crossing, the right bank and floodplain vegetation is grass lawn, while the left bankhas young trees and shrubs with little or no floodplain due to encroachment by the road.Downstream of the bridge, the bank and floodplain vegetation on both sides is moderately denseforest, consisting of green ash, holly, tulip, poplar, and walnut with a moderately denseunderstory consisting mostly of multiflora rose and privet.



365.101.323.700.79


0.53> 3250110.30

R.I.: >15R.I.: 1.02



0.01650.0644.404.531.750.56


184.004.2222.951.04461.1

LONG GREEN CREEK AT GLEN ARM, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 7 .0 5D 3 5 8 .0 0 3 5 .2 3D 5 0 1 3 2 .8 1 8 2 .4 6D 8 4 4 9 5 .8 9 3 1 1 .0 0D 9 5 B e d r o c k 5 3 0 .0 6


The reach pebble count distribution is bi-modal (silt and boulder). The largest number of observations is in the boulder size class. The riffle pebble count D50 is cobble.


80

90

100

-10 0 10 20 30 40 50 60 70 80 90 100 110

Distance (ft)

Ele

vatio

n (f

t)



43.6082.931.78


1.903.1246.47



Long Green Creek at Glen Arm, Maryland

Long Green Creek at Glen Arm

MORGAN RUN AT LOUISVILLE, MDUSGS STATION NUMBER: 1586610



39o 27' 07"76o 57' 20"Carroll / 1990Map 30 / C128.005 / 654.00


1982 – Present35.00C4/1Oct. 1997Sept. 1998



Q1.005: 235.70 Q1.5: 850.00 Q2.0: 1170.00

General Study Reach Description: The downstream end of the study reach is 322 feet upstreamof the gage due to deposition and lateral adjustment from the bridge crossing in the interveningreach. The study reach has pool/riffle features, a bedrock-controlled meander pattern, point andside bar depositional features, some lateral scour, and appears vertically stable. There are severalpieces of large woody debris; two extend well into the channel. Numerous boulders and bedrockoutcrops occur throughout the reach. The bank and floodplain vegetation is moderately denseforest, consisting of oak, sycamore, tulip poplar, and walnut, with a moderately denseunderstory, consisting of ironwood and mountain laurel.



1024.001.754.821.20


0.882233.00238.30

R.I.: 5.00R.I.: 1.01(SYS)



0.00520.0376.188.584.410.61


178.003.4216.351.183146.0

MORGAN RUN AT LOUISVILLE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 0 .2 8D 3 5 1 3 .4 6 8 .8 9D 5 0 3 2 .0 0 1 6 .7 7D 8 4 3 8 4 .0 0 2 1 3 .7 7D 9 5 B e d r o c k 3 7 4 .6 0



80

90

100

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)



52.00165.583.09


3.185.2053.57

NORTHEAST CREEK AT LESLIE, MDUSGS STATION NUMBER: 1496000



39o 37' 38"75o 56' 40"Cecil / 1989Map 11 / E524.303 / 302.85


1948 - 198435.70C2/1Sept. 1997Oct. 1998



Q1.005: 535.70 Q1.5: 1200.00 Q2.0: 1502.80

General Study Reach Description: The study reach and gage reach are the same. The reach hasboth step/pool and riffle/pool features, a regular bedrock-controlled meander pattern withslightly developed point bar depositional features, and is stabilized vertically by bedrockoutcrops. There is little or no large woody debris, but numerous boulders and bedrock outcropsoccur throughout the reach. The bank and floodplain vegetation are moderately dense forest,consisting of tulip poplar, beech, oak, ironwood, and red maple, with a moderately denseunderstory of mountain laurel and rhododendron.



1336.001.674.721.11


0.892386.00n/a

R.I.: 5.50R.I.: n/a



0.01200.0526.766.141.770.65


181.003.1217.011.114307.4

NORTHEAST CREEK AT LESLIE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .4 0 7 .1 7D 3 5 2 9 .7 8 8 9 .6 5D 5 0 1 0 6 .9 4 2 0 4 .8 4D 8 4 5 1 2 .0 0 5 4 1 .1 9D 9 5 1 0 2 4 .0 0 8 7 6 .1 3


The reach pebble count distribution is skewed. The reach pebble count D50 is cobble. The largest number of observations is in the boulder size class. The riffle pebble count D50 is cobble.


-5

5

15

0 10 20 30 40 50 60 70 80 90 100 110 120

Distance (ft)

Ele

vatio

n (f

t)



58.00197.623.15


3.415.0962.75



Northeast Creek at Leslie, Maryland

Northeast Creek at Leslie

NORTHWEST BRANCH ANACOSTIA RIVER NEAR COLESVILLE, MDUSGS STATION NUMBER: 1650500



39o 03' 55"77o 01' 48"Montgomery / 1998Map 31/A9-1021.104 / 4716.53



1924 - 19831997 - Present22.50E5/1Oct. 1998Dec. 1998



Q1.005: 447.60 Q1.5: 960.00 Q2.0: 1227.00

General Study Reach Description: The study reach and gage reach are the same. The study reachhas run/pool features, a bedrock and boulder revetment controlled meander pattern with minordepositional features, some lateral scour, and is stabilized vertically by bedrock outcrops in the bed.There is no large woody debris in the reach. The bank vegetation is moderately dense forest of boxelder, silver maple and sycamore. On the left, the floodplain is old-field with recently planted trees,while the right floodplain is covered by moderately dense forest with a moderately denseunderstory of sapling trees and spicebush. Immediately upstream of the reach, the stream passesthrough a 3-cell box culvert, and an abandoned bridge crosses the channel at the downstream end ofthe reach. The reach appears to have been straightened at some time in the past, and the reachimmediately downstream was channelized in the 1930s, according to the USGS gage record.



907.001.436.470.94


0.741081.00n/a

R.I.: 1.60R.I.: n/a



0.00170.0364.529.4214.310.36


601.0014.718.321.06791.9

NORTHWEST BRANCH ANACOSTIA RIVER NEAR COLESVILLE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .0 8 0 .3 5D 3 5 0 .2 2 1 1 .4 1D 5 0 1 .1 3 2 2 .8 1D 8 4 4 8 .0 0 9 1 .2 6D 9 5 5 1 2 .0 0 1 6 3 .2 5



0

10

20

0 20 40 60 80 100 120 140 160

Distance (ft)

Ele

vatio

n (f

t)



40.85200.684.28


4.915.9746.84



Northwest Branch of the Anacostia River near Colesville, Maryland

Northwest Branch of the Anacostia River near Colesville

PATUXENT RIVER NEAR UNITY, MDUSGS STATION NUMBER: 1591000



39o 14' 18"77o 03' 23"Montgomery / 1998Map 12 / G434.804 / 642.14


1944 - Present39.40C4Oct. 1997Jan. 1999



Q1.005: 284.80 Q1.5: 1050.00 Q2.0: 1495.10

General Study Reach Description: The downstream end of the study reach is 2,500 feet upstream ofthe gage because of a long intervening reach of divided channel, and potential reservoir backwatereffects below the gage. The reach has pool/riffle features, a regular meander pattern with point,side, and mid-channel bars (the latter associated with debris blockages), some lateral scour, andappears vertically stable. There are several pieces of large woody debris, some span or greatlyblock the channel, and numerous boulders throughout the reach. The bank vegetation is mature redmaple and sycamore, while the floodplain vegetation is a mix of pasture and forest with a sparse tomoderately dense understory.



1045.001.506.101.00


0.701777.00n/a

R.I.: 2.40R.I.: n/a



0.00210.0305.1710.7726.880.46


428.008.2313.371.263106.0

PATUXENT RIVER NEAR UNITY, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a n / aD 3 5 0 .1 0 8 .4 8D 5 0 1 .4 1 1 4 .0 4D 8 4 4 8 .0 0 3 8 .9 9D 9 5 9 6 .0 0 5 8 .9 5


The reach pebble count distribution is bi-modal (silt/clay and gravel). The largest number of oberservations is in the gravel size class. The riffle pebble count D50 is gravel.


90

100

110

0 10 20 30 40 50 60 70

Distance (ft)

Ele

vatio

n (f

t)



52.00202.203.44


3.894.8258.80



Patuxent River near Unity, Maryland

Patuxent River near Unity

PINEY CREEK NEAR TANEYTOWN, MDUSGS STATION NUMBER: 1639140



39o 39' 38"77o 13' 16"Carroll / 1990Map 9 / C231.304 / 443.96


1990 - Present40.40C4/1Oct. 1998Dec. 1998



Q1.005: n/a Q1.5: 1525.00 Q2.0: 1930.00

General Study Reach Description: The study reach and the gage reach are the same. The reachhas pool/riffle features, a bedrock-controlled meander pattern with point and side bardepositional features, some lateral scour, and is stabilized vertically by bedrock outcrops. Thereis no large woody debris in the reach. The bank vegetation is mature green ash, red maple andsycamore. On the left and on the downstream right, the floodplain vegetation is mature forestwith moderately dense understory of shrubs and sapling trees, while the floodplain vegetation onthe upper right is pasture. Cattle have unrestricted access to the channel over the entire reach.Upstream of the study reach the channel appears to have been straightened at some time in thepast. Roop Road crosses the channel on a bridge at the lower end of the reach.



1389.001.405.940.91


0.721949.00n/a

R.I.: 2.00R.I.: n/a



0.00250.0325.5810.338.990.51


600.009.1217.411.473345.1

PINEY CREEK NEAR TANEYTOWN, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 9 .2 1D 3 5 0 .4 1 3 8 .6 7D 5 0 1 4 .5 4 6 7 .6 4D 8 4 1 2 5 .0 9 1 2 4 .7 3D 9 5 B e d r o c k 1 8 1 .4 0



0

10

0 10 20 30 40 50 60 70 80 90 100

Distance (ft)

Elev

atio

n (ft

)



65.80248.903.68


3.785.3667.68



Piney Creek at Taneytown, Maryland

Piney Creek at Taneytown

SENECA CREEK AT DAWSONVILLE, MDUSGS STATION NUMBER: 1645000



39o 07' 41"77o 20' 13"Montgomery / 1998Map 17 / E11101.005 / 18912.04


1930 - Present109.00C4Nov. 1997



Q1.005: 831.20 Q1.5: 3050.00 Q2.0: 4322.00

General Study Reach Description: The upstream end of the study reach is 103 feet downstream ofthe gage, the channel forks a few hundred feet upstream of the gage. The study reach haspool/riffle features, a straight meander pattern with point and side bars, some lateral scour, andappears vertically stable. There are several pieces of large woody debris in the reach, but none thatextend across or well into the channel. The bank vegetation is forest, consisting of sycamore, riverbirch and ironwood with a low-density understory, while the floodplain vegetation is mostlypasture/hay field.



2562.001.337.530.84


0.59n/a761.20

R.I.: n/aR.I.: <1.005



0.00140.0276.3812.76118.530.46


803.0012.0211.111.05991.5

SENECA CREEK AT DAWSONVILLE, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 0 .1 9D 3 5 0 .2 5 4 .3 4D 5 0 2 .8 3 6 .3 1D 8 4 2 4 .0 0 1 4 .0 1D 9 5 4 8 .0 0 3 2 .0 0



80

90

100

0 10 20 30 40 50 60 70 80 90

Distance (ft)

Elev

atio

n (ft

)



66.80401.375.45


6.016.7273.67



Seneca Creek at Dawnsonville, Maryland

Seneca Creek at Dawnsonville

SLADE RUN NEAR GLYNDON, MDUSGS STATION NUMBER: 1583000



39o 29' 40"76o 47' 45"Baltimore / 1993Map 16 / E-F22.092 / 57.87


1947 – 19812.40E4June 1998Oct. 1998



Q1.005: 46.30 Q1.5: 125.00 Q2.0: 154.40

General Study Reach Description: The study reach and gage reach are the same. The reach haspool/riffle features, a regular meander pattern with no bar depositional features, little lateralscour, and appears vertically stable. There is no large woody debris in the reach. The bankvegetation is willow and alder shrub with scattered trees, while the floodplain vegetation ispasture. Livestock have unrestricted access to the stream channel.



114.801.403.540.92


0.74240.80n/a

R.I.: 4.60R.I.: n/a



0.01200.0435.996.302.710.88


446.0033.769.111.07251.9

SLADE RUN NEAR GLYNDON, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)






0

10

320 330 340 350 360 370 380 390

Distance (ft)

Ele

vatio

n (f

t)



13.2119.151.28


1.452.8314.98



Slade Run near Glyndon, Maryland

Slade Run near Glyndon

WESTERN RUN AT WESTERN RUN, MDUSGS STATION NUMBER: 1583500



39o 30' 38"76o 40' 37"Baltimore / 1993Map 12 / C1259.805 / 1353.40


1944 - Present69.70C4/1Oct. 1997



Q1.005: 528.00 Q1.5: 1550.00 Q2.0: 2134.70

General Study Reach Description: The upstream end of the study reach is 430 feet downstreamof the gage due to the Western Run Road bridge channel constriction. The reach has riffle/poolfeatures, a bedrock-controlled meander pattern with mid-channel, point, and side bar depositionalfeatures, and some lateral scour. There are numerous pieces of large woody debris, some ofwhich extend well into the channel, and numerous boulders throughout the reach. The bankvegetation is comprised of sycamore, walnut and ironwood trees with a moderately denseunderstory, while the floodplain vegetation is a mix of pasture and moderately dense forest witha moderately dense understory of sapling trees and shrubs.



1531.001.475.260.99


0.722225.00666.40

R.I.: 2.12R.I.: 1.03



0.00240.0384.888.7128.230.42


1591.0021.1018.131.476008.0

WESTERN RUN AT WESTERN RUN, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 n / a 0 .1 0D 3 5 0 .2 5 1 .6 5D 5 0 4 .2 8 1 3 .6 6D 8 4 6 9 .4 1 4 3 .4 8D 9 5 B e d r o c k 7 1 .2 4



80

90

100

0 10 20 30 40 50 60 70 80 90 100

Distance (ft)

Ele

vatio

n (f

t)



75.40313.814.03


4.165.6377.93



Western Run at Western Run, Maryland

Western Run at Western Run

WINTERS RUN NEAR BENSON, MDUSGS STATION NUMBER: 1581700



39o 31' 12"76o 22' 24"Harford / 1992Map 17 / A-B1134.803 / 327.55


1967 - Present53.00C4/1Sept. 1997



Q1.005: 293.10 Q1.5: 1700.00 Q2.0: 2487.50

General Study Reach Description: The downstream end of the study reach is 400 feet upstreamof the gage. The reach has pool/riffle features, a straight meander pattern (controlled at one pointby gabion revetment) with mid-channel and side bar depositional features, and some lateralscour. There is no large woody debris in the reach. The bank vegetation is a mix of golf coursefairway grass and willow/box elder thickets, with a short section of trees, predominatelysycamore, red maple and alder, at the downstream end



1961.001.655.951.15


0.79n/an/a

R.I.: n/aR.I.: n/a



0.00520.0426.647.9011.680.56


250.003.7315.191.142373.5

WINTERS RUN NEAR BENSON, MDPARTICLE SIZE DISTRIBUTION

0102030405060708090

100

0.01 0.1 1 10 100 1000 10000

Particle Size (mm)

% C

umul

ativ

e (f

iner

than

)



F i n e r T h a n R e a c h R i f f l eD 1 6 0 .0 9 1 6 .4 7D 3 5 0 .7 6 3 8 .6 7D 5 0 2 6 .4 2 5 4 .5 5D 8 4 1 2 0 .0 7 1 0 9 .4 3D 9 5 2 3 2 .5 9 1 6 9 .2 5



80

90

100

0 10 20 30 40 50 60 70 80 90

Distance (ft)

Ele

vatio

n (f

t)



67.00295.544.20


4.415.2470.45



Winters Run at Benson, Maryland

Winters Run at Benson

Documents

APPENDIX A Site Characteristics for Selected USGS Gage ... · Site Characteristics for Selected USGS Gage Stations in the Piedmont Physiographic ... the annual maximum series calculated