AGENDA · 8/1/2018 · Agriculture in the Rio Grande Basin”, a four (4) year USDA-NIFA (National Institute of Food and Agriculture) project of which he is a co-principal investigator

1

AGENDA RIO GRANDE REGIONAL WATER PLANNING GROUP

(RGRWPG) (REGION M) 10:30 A.M. WEDNESDAY, AUGUST 1, 2018

LRGVDC MAIN CAMPUS KEN JONES EXECUTIVE BOARD ROOM

301 W. RAILROAD ST., WESLACO, TEXAS

PRESIDING: TOMAS RODRIGUEZ, CHAIRMAN

1. Call to Order & Roll Call .................................................................................................................... Chairman

2. Consider Approval of June 6, 2018 Meeting Minutes ........................................................................ Chairman

3. Public Comment .................................................................................................................................. Chairman

4. Consider Nominating Committee Recommendation on Voting Members in County Category andElectric Generating Utility Category ................................................................................................. Chairman

5. Consider Approval to Write Letter to TCEQ Requesting Falcon Dam Water Levels beMaintained at 270 Feet over Mean Sea Level ..................................................................................... Chairman

6. Consider Approval to Terminate Plan Amendment Process forthe City of Penitas and the City of Primera ......................................................................................... Chairman

ACTION ITEM

ACTION ITEM 2/3 vote

ACTION ITEM

ACTION ITEM

2

7. Status Reports

A. Status on Current TWDB Contract Activities .......................................................................... Sara Eatman Black & Veatch

1. Consider Approval of Hydrologic Variance Request and Submittal to TWDB Executive

Administrator 2. Consider Approval of Technical Memorandum and Submittal to TWDB Executive Administrator,

with Non-Substantive Revisions as Needed

B. Financial Report ................................................................................................................... Marcie Oviedo LRGVDC

C. Status of Joint Groundwater Area Planning in GMA’s 4, 5, 7, 13, & 16 ............................. Armando Vela GMA 16

D. Status of No Charge Releases from the San Juan River .................................................... Sonny Hinojosa Vice Chair

E. Reports from Other Water Planning Groups

1. Reports from Liaisons with Regions: Region E, Glenn Jarvis; Region J, Chairman Tomas Rodriguez; Region L, Don McGhee, and Region N, vacant

F. Report on Water Conservation Plans and Drought Management Plans Filed with Region ......... Chairman

G. Report on Notices of Applications for Funding and Grants ......................................................... Chairman

ACTION MAY BE TAKEN ON ANY OF THE FOLLOWING ITEMS

3

8. Reports from Federal and State Agencies

A. TWDB ..................................................................................................................................William Alfaro Regional Water Planning

1. Update on Rules Pamphlet and Public Notification Tool

B. IBWC ..................................................................................................................................... Jose A. Nuñez Acting Commissioner

C. TCEQ Watermaster ......................................................................................................... Jose “Lupe” Luna Rio Grande Watermaster

D. TPWD ........................................................................................................................................ Willy Cupit Coastal Ecologist

9. Discussion and Consider Action RE: Meeting Schedule ................................................................... Chairman 10. Adjourn

Agenda items may be considered, deliberated and/or acted upon in a different order than numbered above. The Board of Directors of the Rio Grande Regional Water Planning Group (RGRWPG) (Region M) reserves the right to adjourn into Executive (Closed) Session at any time during the course of this meeting to discuss any of the items listed on this agenda as authorized by the Texas Open Meetings Act. No final action will be taken in Executive Session.

PUBLIC INPUT POLICY

Public Input Policy: “At the beginning of each RGRWPG meeting, the RGRWPG will allow for an open public forum/comment period. This comment period shall not exceed one (1) hour in length, and each speaker will be allowed a maximum of three (3) minutes to speak. All individuals desiring to address the RGRWPG must be signed up to do so, prior to the open comment period. The purpose of this comment period is to provide the public an opportunity to address issues or topics that are under the jurisdiction of the RGRWPG as outlined within final implementation guidelines of Senate Bill 1, 75th Legislative Session (SB-1). For issues or topics which are not otherwise part of the posted agenda for the meeting, RGRWPG members may direct staff to investigate the issue or topic further. No action shall be taken on issues or topics which are not part of the posted agenda for the meeting. Members of the public may be recognized on posted agenda items deemed appropriate by the Chairman as these items are considered, and the same time limitation (3 minutes) applies.”

ACTION MAY BE TAKEN ON ANY OF THE FOLLOWING ITEMS

ACTION ITEM

ITEM 2.

MEETING MINUTES

Minutes, RGRWPG, June 6, 2018, Page 1 of 5

MINUTES

MEETING OF THE RIO GRANDE REGIONAL WATER PLANNING GROUP (RGRWPG) (REGION “M”)

11:00 A.M. WEDNESDAY, JUNE 6, 2018

ZAPATA COUNTY COURT HOUSE

200 7TH AVENUE, SUITE 248, ZAPATA TX PRESIDING: PRESIDENT TOMAS RODRIGUEZ, CHAIRMAN

1. Call to Order and Roll Call Chairman Tomas Rodriguez called the meeting to order at 11:00 a.m. and announced that the meeting had been posted as required by statute, and that a quorum of the voting membership was present. The following voting members were in attendance: Board Members Category Tomas Rodriguez, Chairman Public Sonny Hinojosa, Vice Chairman Water Districts Donald McGhee, Secretary Industries Frank Schuster, Executive Committee Other Nick Benavides, Executive Committee Small Business Carlos Garza Small Business Dennis Goldsberry Water Utility Judge Joe Rathmell Counties Riazul Mia Municipalities Jorge Flores Municipalities The following members were not in attendance: Glenn Jarvis Other John Bruciak Municipalities Sonia Lambert Water Districts Mayor Jim Darling River Authorities Jaime Flores Environmental Armando Vela Groundwater Management Area Judge Humberto Gonzalez Counties Robert Pena, Jr. Electric Generating Utilities Dale Murden Agriculture Dr. Neal Wilkins Agriculture 2. Consider Approval of April 10, 2018 Meeting Minutes Mr. Sonny Hinojosa made a motion to approve the minutes of April 10, 2018 as presented. Mr. Carlos Garza seconded the motion, and upon a vote the motion carried unanimously. 3. Hear Public Comment There were no public comments. 4. Consider Removal of Voting Member in Electric Generating Utilities Category Mr. Carlos Garza made a motion to remove Mr. Robert Pena as a voting member due to excessive absenteeism. Mr. Riazul Mia seconded the motion, and upon a vote the motion


passed with a vote of 5 for and 4 against.15.40 5. Consider Approval to Advertise for Voting Members in County Category and Electric Generating Utilities Category Judge Joe Rathmell made a motion to advertise for one (1) voting member in the County category and one (1) voting member in the Electric Generating Utilities category. The motion was seconded by Mr. Sonny Hinojosa and upon a vote the motion carried unanimously. 17.02 6. Presentation RE: Water Allocations in the Rio Grande Askarali Karimov, Ph.D. was recognized and gave a presentation titled “Water Allocations in the Rio Grande” that covered the extended hydrologic datasets he has developed for the Rio Grande Water Availability Model (WAM) that covers the 1940 – 2016 hydrologic period of analysis which is used by the Group to develop the Regional Water Plan. The presentation also included the Texas Rio Grande Basin, Rio Grande Water Rights, Irrigation Districts, Drought Management, and short and long-term reliability analysis. Dr. Karimov also discussed “The Diversifying Water Portfolio for Agriculture in the Rio Grande Basin”, a four (4) year USDA-NIFA (National Institute of Food and Agriculture) project of which he is a co-principal investigator and Extension Program Leader. 1.13.00 7. Status Reports

A. Status on Current TWDB Contract Activities Ms. Sara Eatman, Black & Veatch, was recognized and informed the Group that she has not received responses from either the City of Penitas or the City of Primera regarding further information on their requests for amendments to the 2016 Regional Water Plan. Chairman Rodriguez recommended ending these Plan amendment opportunities because of lack of notice and response from the requesting entities and stated that he will include an item on the next agenda to take action accordingly.

1.21.00 1. 2021 RWP Development Process

Ms. Eatman reported that the Technical Memorandum is due to TWDB by September 10 and will include Water User Group (WUG) population and demands, Wholesale Water Providers (WWP) relationships, current supplies, designated Major Water Providers (MWP), and source availability. 1.21.00

2. Major Water Providers

Ms. Eatman stated that the Rio Grande Regional Water Planning Group agreed on a threshold for determining if an entity qualifies as a Major Water Provider (MWP) at the last Board Meeting. Any entity that supplies or delivers 3,000 acre feet or more of municipal water delivery in 2020, will be designated a MWP in the 2021 RWP based on current estimates of 2020 municipal supplies. The Major Water Provider designation will not change the role of the entity in the RWP, but TWDB will require a few additional summaries of information about the MWPs in the plan to provide a “snapshot” of the region.

3. “Virtual” Water Market Accounting

Ms. Eatman explained that the RWP rules require the consultants to populate a database in addition to writing the text of the Plan. TWDB’s DB22 database follows every “drop” of water from the source through physical and ownership transfers down to the end user. She emphasized that all supplies must be reliable in a drought year in order to be included in the Plan. One-time water sales have not been included in previous plans, but may represent a significant supply of water for some entities1.23.56


The Group considered the following approach to represent existing supplies from the Water Market in the Planning Data in DB22:

• That entities that have more water supply than demand in the planning data (surplus), can be shown to sell water on the water market.

• Entities that show need can be shown in the plan to purchase water on the water market.

• Transactions will be between individual entities in reality, but will be grouped together in the planning data under a “virtual water market” entity.

• Only municipal water will be considered in the Virtual Water Market planning data.

• The total quantity of water that will be shown as passing through the “virtual Water Market” in the existing supply planning data will be limited to 2% of the municipal water rights, which is considered representative of an average historical year.

• The use of the Virtual Water Market and on-time water transactions in the water planning data will presently be limited to existing supplies, and will be revisited when the Group is considering what water management strategies and projects to recommend in the RWP.

Upon conclusion of discussion Mr. Carlos Garza made a motion to approve the use of a “Virtual” Water Market in the planning data with up to 2% of the municipal water rights. Mr. Frank Schuster seconded the motion, and upon a vote the motion carried unanimously. 1.59.11

B. Financial Report

Ms. Marcie Oviedo, LRGVDC was recognized and report that so far approximately $12,500 has been collected from the recent request for local matching funds. The current budget balance is $14,590.73 and the current available cash is $81,049.02.

C. Status of Joint Groundwater Area Planning in GMA’s 4, 5, 7, 13, & 16

There was no new information to report at this time.

D. Status of No Charge Releases from the San Juan River There was no new information to report on this item.

E. Reports from Other Water Planning Groups

1.26.30 1. Reports from Liaisons with Regions: Region E, Glenn Jarvis; Region J, Chairman

Tomas Rodriguez; Region L, Don McGhee, and Region N, Judge Humberto Gonzalez Mr. Carl Schwing, Liaison from Region J, was recognized and reported that there is not much change from the previous report in June except that the aerial pipeline has been installed and they are making the connections at the present time to the facilities. 2.01.57

F. Report on Water Conservation Plans and Drought Management Plans Filed with Region Chairman Rodriguez noted that McAllen PUB has submitted their current Water Conservation and Drought Contingency Plan.

G. Report on Notices of Applications for Funding and Grants

Current notices have been emailed to the Group.

H. Report on Voting Member Completion of Texas Open Meetings Act Chairman Rodriguez noted there was only one Voting Member who has yet to complete the training and submit the certificate of completion.


8. Reports from Federal and State Agencies 1.35.07

A. TWDB Mr. William Alfaro was recognized and addressed the following items:

2.03.40 1. Presentation RE: Update on Revised 31 Texas Administrative Code (TAC) Rules,

Chapters 355 & 357 Mr. Alfaro provided details on the many revisions recently made to the Texas Administrative Code pertaining to water planning. Upon conclusion of the presentation on the TAC, Mr. Alfaro proceeded with the status of the following: • Rules Revisions

Final rule revisions were adopted March 21, 2018 and became effective on April 11, 2018.

• Population and Water Demand Projections Mr. Alfaro reported that the Board adopted projections on April 16 for the 2021 Regional Water Plans and the 2022 State Water Plan.

• Flood Assessment The goals for the State Flood Assessment include assessing flood risks, estimating flood mitigation costs, and gathering stakeholder input on how flood planning should proceed in the state. The public comments period for this project is open during the summer of 2018 and the final report is due in December 2018.

• Working Schedule and upcoming Deadlines The Technical Memorandum is due on September 10, 2018 and has new notification requirements and new content.

B. IBWC No representative from the IBWC was present and no report was provided; however, Chairman Rodriguez announced that Mr. Jose A. Nuñez had recently been appointed IBWC’s Acting Commissioner.

C. TCEQ Watermaster There were no representatives from the TCEQ Watermaster’s Office; however, the report on reservoir levels was in the meeting packet for review.

D. TPWD There was no new information to report at this time. Judge Joe Rathmell asked for a question of privilege and informed the Group that Zapata County is struggling with low water levels in Falcon Lake. This is causing problems for the citizens of Zapata and affecting fishing tourism which is a main source of income. He has discussed this issue with TCEQ with unsatisfactory results, and asked if the Region M Group could add their support to his request. Chairman Rodriguez agreed to include this topic on the next agenda for discussion and possible action.

9. Discussion and Possible Action RE: Meeting Schedule

It was the consensus of the Group to schedule the next meeting on Wednesday, August 1, 2018 at 10:30 am at the LRGVDC Main Campus in Weslaco.


10. Adjourn

There being no further business to come before the Group the meeting was adjourned at 1:37 p.m.

1.13.48 _____________________________________

Tomas Rodriguez, Chairman

ITEM 4.

NOMINATIONS

Phone 956.383.3112 Fax 956.381.5905

Joseph Palacios COMMISSIONER PCT 4

1051 N. Doolittle

Edinburg TX 78542

July 11, 2018

Via Regular U.S. Mail and E-mail: [email protected]

Rio Grande Regional Water Planning Group Executive Committee (“RGRWPG”)

C/o Ron Garza, Executive Director of the Lower Rio Grande Valley Development Council

301 W. Railroad

Weslaco, Texas 78596

Re: Nomination of Hidalgo County Precinct 1 Commissioner David Fuentes to

RGRWPG Water Planning Group to fill “Vacancy in the County Category”

Dear Mr. Ron Garza,

Attached please find a completed copy of the Rio Grande Regional Water Planning Group (Region M)

Nomination Form. I hereby nominate Hidalgo County Precinct 1 Commissioner David Fuentes because he has

shown tremendous leadership in the areas of water conservation, water reuse, and flood control. As the

responsible person for the Delta Region Watershed Project, Commissioner Fuentes has secured a TCEQ Permit to

beneficially reuse 62,712 acre feet of water per year in Hidalgo County, Willacy County, and Cameron County.

This project will serve as a major economic driver in the coming decades in key areas such as manufacturing,

residential developments, commercial developments, and agriculture.

Having served alongside him in the Hidalgo County Commissioners Court, I can assure you that his

insight to the RGRWPG will be a key asset to developing solutions for our region’s water challenges.

Commissioner Fuentes also serves as a Board Member of Hidalgo County Drainage District No.1 and as

the representative of Hidalgo County in the Lower Rio Grande Valley Development Council. He is therefore well

versed in the challenges we face not only as a county, but also as a region. I speak not only for myself when I state

that Commissioner Fuentes’ vision and leadership will beneficially shape our county for generations to come.

As always, please feel free to reach out to me at any time if I can be of further assistance.

Respectfully,

Joseph Palacios

Hidalgo County Commissioner Precinct 4

Enclosures

x

Joseph Palacios

1051 N. Doolittle Rd., Edinburg, Texas 78542

956-383-3112 956-292-7063 [email protected]

Hidalgo County Precinct 4 County Commissioner

David Fuentes

Hidalgo County

Hidalgo County Precinct 1 Commissioner

Counties; Water Reuse, Water Conservation, and Flood Control

1902 Joe Stephens Ave., Ste. 101, Weslaco, Texas 78596

956-968-8733 956-969-1417 [email protected]

July 11, 2018

Board Member Hidalgo County Drainage District No. 1 and Representative of Hidalgo County in LRGVDC

Please see attached cover letter.

ITEM 5.

LETTER TO TCEQ

ITEM 7.A.

STATUS ON CURRENT TWDB

CONTRACT ACTIVITIES

August 1, 2018

Jeff Walker,

Executive Administrator

Texas Water Development Board

1700 North Congress

Austin, TX 78711-3234

Re: Hydrologic Assumptions for the 2021 Rio Grande Regional Water Plan (Region M)

Mr. Walker,

The Rio Grande Planning Region intends to rely on current Water Availability Model (WAM) Run

3 estimates of Firm Yield and Modeled Available Groundwater to establish availabilities in the

2021 Rio Grande Regional Water Plan. The following assumptions have been approved by the

Rio Grande Regional Water Planning Group at the August 1, 2018 scheduled Board Meeting,

and are submitted here for your review.

Surface Water

1. The most current WAM Run 3 will be used for all Surface Water Rights Modeling for

existing supplies and future WMS;

a. Full exercise of existing surface water rights;

b. Zero effluent discharges unless specifically required by a surface water right

(hydropower, industrial rights, etc.);

c. Best available water rights information as of June, 2018; and

d. In the evaluation of the cumulative effects of water management strategies, the

Rio Grande WAM Run 3 may be used to estimate the impacts of future

urbanization (and the resulting reclassification of water rights) on the firm yield of

the system.

2. Reservoir capacities for Amistad and Falcon will be based on the current estimates for

sedimentation in 2020 and 2070, and a linear interpolation will be used to determine

capacity for the decades between.

a. Existing supplies will be based on the 2020 Firm Yield

b. Projected supplies and WMS will rely on estimated decadal averages of Firm Yield

3. Period of record for simulations:

a. Rio Grande WAM: 1940 – 2000

b. Nueces-Rio Grande WAM: 1948 – 1998

4. The Rio Grande WAM will be run to be consistent with the applicable variances submitted

by Region E and Region F:

a. Irrigation demand patterns above Fort Quitman will be modified so that diversions

only occur March through October, which is consistent with the operations of the

Rio Grande Project.

b. Flows from San Solomon and Griffin Springs have been corrected to enter

upstream of Balmorhea in the Pecos Basin rather than downstream of water right

diversion points.

c. Water rights for three users in Region E were removed because the right was not

recognized for these claimants in adjudication.

Groundwater

1. Availability for existing and future supplies for the Carrizo-Wilcox, Yegua Jackson, Gulf

Coast, and other minor aquifers will be in accordance with Modeled Available

Groundwater estimates, as calculated by TWDB on or before June 1, 2018. Region M may

pursue reallocation of MAG volumes, and will do so in coordination with TWDB.

2. The non-relevant DFC-compatible aquifer availabilities provided by TWDB (May 16, 2018)

will be included as groundwater available for current and future use.

Reuse/Recycle Water

1. Source water available for a reuse water management strategy will be determined based

on the estimated amount of water returned to a utility’s WWTPs for each decade, less

the amount of reuse water already being utilized as existing supply.

a. The amount of water returned to a utility’s WWTP will be estimated at 50% of the

utility’s projected water demands, adjusted for water conservation and drought

management strategies, unless site-specific information is available

Example: [50% * (projected water demands for a utility - conservation WMS

volumes - drought management WMS volumes)] – existing reuse supply

i. For Direct Reuse, this calculation will set an upper limit to the volume of

reuse water available, and will not require any WAM modeling, since Run

3 assumes no return flows.

ii. For Indirect reuse, treated effluent discharge volumes returned to the Rio

Grande would be limited by this calculation, and the effluent could be

entered as a return flow in the WAM to assess downstream availability.

There are no current or proposed future indirect reuse project in Region

M.

2. Existing and future non-potable reuse supplies will be shown to meet no more than 10%

of municipal demands. Manufacturing and steam-electric use of non-potable water will

be considered on a case-by-case basis.

Hydrologic Models

• Rio Grande WAM (downloaded from TCEQ 6/29/18)

• Nueces – Rio Grande WAM (downloaded from TCEQ 6/21/18)

• Southern Carrizo-Wilcox-Queen City-Sparta GAM

• Gulf Coast Aquifer System (southern portion) GAM

• Yegua-Jackson Aquifer GAM

• Any additional currently-approved WAM or GAM necessary

Please contact me if you have any questions.

Sincerely,

Sara Eatman

Technical Consultant, Rio Grande Regional Water Planning Group

Cc: Tomas Rodriguez, Chairman, Rio Grande Regional Water Planning Group

William Alfaro, TWDB Project Manager

DRAFT

TECHNICAL MEMORANDUM

2021 Rio Grande Regional Water Plan

B&V PROJECT NO. 123456

PREPARED FOR


10 SEPTEMBER 2018

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August 6, 2018

Mr. Jeff Walker



P.O. Box 13231

Austin, Texas 78711

Re: Technical Memorandum

Dear Mr. Walker,

At its meeting on August 2, 2018, the Rio Grande Regional Water Planning Group (RWPG) reviewed the

information pertinent to the Technical Memorandum, and approved the submittal of this information.

The enclosed memorandum and attachments serve as the Technical Memorandum for Region M.

As always, please reach out to me or my staff with any questions you may have.

Sincerely,

Tomas Rodriguez

Region M Chair

Cc:

Sara Eatman, Technical Consultant, Black & Veatch

William Alfaro, Regional Water Planning, Texas Water Development Board

Ron Garza, Executive Administrator, Lower Rio Grande Valley Development Council

BLACK & VEATCH | Table of Contents i

Table of Contents

Simplified Planning ................................................................................................................... 1

TWDB DB22 Reports ................................................................................................................ 2

Source Water Availability Assumptions ............................................................................ 3

Surface Water ........................................................................................................................................ 3

Rio Grande WAM ............................................................................................................................. 3

Nueces Rio Grande WAM ............................................................................................................. 5

Groundwater .......................................................................................................................................... 5

Identification of Potentially Feasible Water Management Strategies .................... 6

Potentially Feasible WMS Identified by the RWPG ........................................................ 8

LIST OF TABLES

Table 1 Rio Grande WAM Versions, Firm Supply Evaluation Results ......................... 4

Table 2 Nueces-Rio Grande WAM, Firm Yield Evaluation Results ................................ 5

Table 3 Potentially Feasible Water Management Strategies identified by

RWPG as of 7/25/18 ....................................................................................................... 8

APPENDICES

Appendix A: DB22 Reports

Appendix B: Region M Hydrologic Variance Request

Appendix C: Region E Hydrologic Variance Request

Appendix D: Rio Grande WAM files (electronic)

Appendix E: Nueces-Rio Grande WAM files (electronic)

2021 Rio Grande Regional Water Plan | TECHNICAL MEMORANDUM

BLACK & VEATCH | Simplified Planning 1

Simplified Planning Simplified Planning is an option provided in Senate Bill 1511, 85th Legislative Session, which

Regional Water Planning Groups may pursue if there are “no significant changes to the water

availability, water supplies, or water demands in the regional water planning area” (Second

Amended Exhibit C (2017-2021), General Guidelines for Fifth Cycle of Regional Water Plan

Development, April 2018, TWDB).

The Rio Grande Regional Water Planning Group (Region M) does not intend to pursue simplified

planning.

2 JULY 2018

TWDB DB22 Reports The following reports have been generated from the TWDB 2022 State Water Planning database

(DB22), and are included in Appendix A: DB22 Reports:

1. Population Projections

2. Water Demand Projections

3. Source Water Availability

4. Existing Water Supplies

5. Identified Water Needs/Surpluses

6. WUG Category Summary

7. Source Water Balance

8. Comparison of Availability, Supply, Demands, and Needs to 2017 RWP


BLACK & VEATCH | Source Water Availability Assumptions 3

Source Water Availability Assumptions The following discussion describes the models and assumptions that have been used to estimate

the availability of water from groundwater, surface water, and other sources. Region M has

submitted a Hydrologic Variance (Appendix B: Region M Hydrologic Variance Request) on August 6

2018, which has not yet been approved by the TWDB Executive Administrator.

SURFACE WATER

Region M relies on two hydrologic models for surface water availability: the Rio Grande WAM and

to a much lesser extent, the Nueces-Rio Grande WAM. For regional water planning purposes, the

most current WAM Run 3 is used to estimate existing and future water supplies, with the following

assumptions:

1. Full exercise of existing surface water rights;

2. Zero effluent discharges unless specifically required by a surface water right (hydropower,

industrial rights, etc.);

Modeling versions, assumptions, and results are included here.

Rio Grande WAM

A hydrologic variance has been requested that includes modifications to the Rio Grande WAM

which are expected to be consistent with modifications currently being made by the TCEQ.

The Rio Grande WAM has a period of record of 1940 through 2000.

The 2016 Region M Water Plan relied on a modified Rio Grande WAM which consolidated the water

rights diversions to 14 aggregated demands, 7 diverted from the Middle Rio Grande Basin, and 7

from the Lower Rio Grande Basin (“abbreviated WAM”). These modifications and several other

corrections were made in close coordination with the water modeling staff at TCEQ, and have been

adopted in revisions to the TCEQ’s current Rio Grande WAM.

The TCEQ staff has since performed a detailed review and update to the abbreviated Rio Grande

WAM, which is expected to be complete in July of 2018. This version is the “current” Rio Grande

WAM, which includes revisions based on feedback from Region E, F and M.

The hydrologic variance request submitted by Region E (Appendix C: Region E Hydrologic Variance

Request) on February 22, 2018 describes some of the updates and revisions that were requested to

the modeling assumptions and structure in the upper Rio Grande basin:

1. Irrigation demand patterns above Fort Quitman will be modified so that diversions only

occur March through October, which is consistent with the operations of the Rio Grande

Project;

2. Flows from San Solomon and Griffin Springs have been corrected to enter upstream of

Balmorhea in the Pecos Basin rather than downstream of water right diversion points;

4 JULY 2018

3. Three water rights for three users in Region E were removed because the right was not

recognized for these claimants in adjudication;

And Region M has worked closely with TECQ to make the following updates:

4. The distribution of municipal, and irrigation Class A and B water rights have been updated

as water rights ownership and classification have changed.

In order to establish decadal firm yield estimates over the planning horizon, the rate of

sedimentation was estimated. Reservoir capacities for Amistad and Falcon will be based on the

current estimates for sedimentation in 2020 and 2070, and a linear interpolation will be used to

determine capacity for the decades between.

Table 1 Rio Grande WAM Versions, Firm Supply Evaluation Results

VERSION MODEL RUN KEY CHANGES 2020 FIRM

YIELD

(ACFT/YR)

2070 FIRM

YIELD

(ACFT/YR)

2016 RWP

“abbreviated”

Modification

Approved by EA

6/2/2014

Run by Kennedy

Resources Company

• 14 aggregated

representative water

rights at two diversion

points

• Updated sedimentation

1,060,616 1,053,834

2021 RWP

“current”

Initial download

with modifications:

6/28/18

TCEQ Update

Expected:

7/26/18

Run by

Black & Veatch

• Revisions consistent

with Region E’s

Hydrologic Variance

request

• Updated water right

class distribution

• Updated sedimentation

1,103,734 1,101,647

Projections of water rights classification conversion due to urbanization can impact the yield from

the Amistad-Falcon system as a result of demands being met from different storage pools. The Firm

Yield of the system used as the basis for the existing water supplies and water management

strategies uses current water right class distribution, but does not include an assumption of

urbanization in the yield calculation. As the rate of conversion from irrigation to municipal lands,

and therefore water rights, is projected to continue over the planning horizon, the impact to the

firm yield will be estimated and reported under the discussion of cumulative effects of the proposed

projects and strategies on the planning area.

The Rio Grande WAM files are included as Appendix D (electronic).


BLACK & VEATCH | Source Water Availability Assumptions 5

Nueces Rio Grande WAM

The Nueces-Rio Grande WAM (downloaded from TCEQ 6/21/18) has been run by Black & Veatch

on 6/27/18 without any modifications to estimate firm yield. Nueces-Rio Grande WAM has a period

of record from 1948 through 1998. There are only 58 water rights in total, and only 4 that have a

firm yield on a monthly basis. The two water rights in Region M with a firm yield are shown in

Table 2.

Table 2 Nueces-Rio Grande WAM, Firm Yield Evaluation Results

WR

NUMBER

OWNER COUNTY USE

TYPE

PERMITTED

DIVERSION

(ACFT/YR)

FIRM YIELD

(ACFT/YR)

22-4527 Adams Gardens

Irrigation District

#19

Cameron IRR 50 50

22-4552 Cameron Co

Irrigation District

#16

Cameron IRR 300 300

Nueces-Rio Grande WAM files are included as Appendix E.

GROUNDWATER

The most recent reports from Groundwater Management Areas (GMA) 16 (GR17-025 MAG) and

GMA 13 (GR17-027 MAG) show the Modeled Available Groundwater (MAG) availabilities for each

decade of the planning horizon.

Availability for existing and future supplies for the Carrizo-Wilcox, Yegua Jackson, Gulf Coast, and

other minor aquifers has been developed in accordance with Modeled Available Groundwater

estimates, as calculated by TWDB on or before June 1, 2018. Additionally, the non-relevant DFC-

compatible aquifer availabilities provided by TWDB (May 16, 2018) has been included as

groundwater available for current and future use.

The Region M RWPG may pursue reallocation of MAG volumes in the future, and will do so in close

coordination with TWDB.

6 JULY 2018

Identification of Potentially Feasible Water Management Strategies1 The following documented process used by the RWPG to identify potentially feasible WMS was

Approved by the Rio Grande Regional Water Planning Group meeting unanimously January 24 ,

2018

In the development of the 2021 Rio Grande Regional Water Plan (Region M Plan), the process for

Identification of Potentially Feasible Water Management Strategies outlined below will be

followed.2

The 2021 Region M Plan is an update of the 2016 Region M Plan, but will require some modification

as a result of updated projections and changes in planning rules:

i. There are updated projections for population, GPCD, and municipal water demand

based on the data from the State Demographer’s Office, the Water Use Survey, and

local input.

ii. The Texas Water Development Board (TWDB) has shifted population and water

demand projections from city-based WUGs to utility-based WUGs.

iii. There are updated non-municipal water demand projections based on updated data

and revised methodologies.

iv. Groundwater availability will be based the Modeled Available Groundwater (MAG)

values from the Groundwater Management Area (GMA) process where those

projections exist.

v. Non-relevant aquifers (aquifers or portions of aquifers considered non-relevant in

the GMA process) may be evaluated as sources.

1 Schedule shown is subject to change based on the availability of the fundamental data/decisions in Item 1 and/or TWDB discretion. 2 Pursuant to the regional water planning rules which state: “Before a regional water planning group begins the process of identifying potentially feasible water management strategies, it shall document the process by which it will list all possible water management strategies and identify the water management strategies that are potentially feasible for meeting a need in the region.”


BLACK & VEATCH | Identification of Potentially Feasible Water Management Strategies 7

vi. The Rio Grande WAM Run 3 adopted by the TCEQ as the current WAM will be used

to determine Firm Yield from the Amistad-Falcon Reservoir System.3

These changes will affect the demand projections, existing supplies, and/or new supplies from

Water Management Strategies (WMS). Hence, the RWPG will be evaluating WMS from the 2016

Region M Plan to determine if they are still viable in the 2021 Region M Plan and soliciting feedback

from WWPs and WUGs in Region M.

1. Current water planning information, including specific WMS of interest, will be solicited

from Water User Groups (WUGs) and Wholesale Water Providers (WWPs) in Summer 2018.

a. Solicitation of planning information will include a draft list of WMS deemed

potentially feasible to meet projected needs.

b. Draft list will generally include the recommended WMS in the 2016 Region M Plan,

WMSs in local water plans, and/or other strategies perceived to be of interest to

WUGs/WWPs.

c. WUGs/WWPs will be encouraged to classify each water management strategy on

their draft list as recommended, alternative, or rejected and provide comments.

2. A lists of potentially feasible WMSs will be prepared based on an initial technical evaluation

and the comments received, which will be available for consideration by the RWPG by early

2019.

3. Additional WMS may be brought forth to the RWPG for consideration until March of 2019.

4. Potentially Feasible WMS will then be evaluated by metrics developed and weighted by the

RWPG.

3 The TCEQ is modifying the ‘Simplified’ WAM that was used as the basis of the 2016 Region M Plan, and as of

1/8/2018 the modifications have not been completed. The best available model will be used to estimate surface water availability.

8 JULY 2018

Potentially Feasible WMS Identified by the RWPG The following potentially feasible Water Management Strategies have been identified by the RWPG

at this time.

Table 3 Potentially Feasible Water Management Strategies identified by RWPG as of 7/25/18

WMS

Advanced Conservation, including:

• Advanced municipal conservation

• Irrigation District conservation (loss prevention)

• Agricultural conservation

• Industrial conservation

Drought Management

Reuse

• Direct, non-potable

• Indirect non-potable

• Direct potable

Management of Existing Water Supplies

Conjunctive use

Acquisition of Available Existing Water Supplies

Development of New Water Supplies

Developing Regional Water Supply Facilities or Providing Regional Management of Water

Supply Facilities

Developing large-scale desalination facilities for seawater or brackish groundwater that

serve local or regional brackish groundwater production zones identified and designated

under TWC §16.060(b)(5)36

Developing large-scale desalination facilities for marine seawater that serve local or

regional entities

Voluntary transfer of water within the region using, but not limited to, contracts, water

marketing, regional water banks, sales, leases, options, subordination agreements, and

financing agreements

• Rio Grande water market for one-time sales

• Conversion and transfer of water rights

Emergency transfer of water under TWC §11.139

Interbasin transfers of surface water

System optimization

Reallocation of reservoir storage to new uses

Enhancements of yields


BLACK & VEATCH | Potentially Feasible WMS Identified by the RWPG 9

WMS

Improvements to water quality

New surface water supply

New groundwater supply

Brush control

• Biological control of Arrundo Donax/Carrizo Cane

• Salt Cedar

Precipitation enhancement

Aquifer storage and recovery

Cancellation of water rights

Rainwater harvesting


BLACK & VEATCH | 11

eat74167

Text Box

Appendix A: DB22 Reports Currently Available

SOURCE BALANCE REPORT

SOURCE NAME: AMISTAD-FALCON LAKE/RESERVOIR SYSTEM

Region County Basin Salinity Source Type | SubType Source Status SourceIdM RESERVOIR RIO GRANDE FRESH SURFACE WATER | RESERVOIR

SYSTEMBOTH 34

2020 2030 2040 2050 2060 2070

Source Availability 1,103,734 1,103,317 1,102,899 1,102,482 1,102,065 1,101,647

Total Direct Source Volume-In 1,102,463 1,101,982 1,101,499 1,101,019 1,100,541 1,100,055

Total WUG Supply 822,043 823,917 831,835 831,841 831,900 831,971

Source Availability Balance(Source Availability - Total Direct Source Volume-In) 1,271 1,335 1,400 1,463 1,524 1,592

Water Volume Summary

7/25/2018 3:38 PM Page 1 of 95

DRAFT - Source Balance Report TWDB RWP22 Database

Existing Supply Data by Entity Associated with Direct Source Volume In

ADAMS GARDEN IRRIGATION DISTRICT #19Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId

Direct Source Volume-In 9,306 9,302 9,298 9,294 9,290 9,286 22712

Sales Associated with Existing Direct Source Volume-In

Seller Buyer 2020 2030 2040 2050 2060 2070 Transaction Id

ADAMS GARDEN IRRIGATION DISTRICT #19 HARLINGEN 505 505 504 504 504 504 75247

ADAMS GARDEN IRRIGATION DISTRICT #19 IRRIGATION, CAMERON 5,823 5,820 5,818 5,815 5,813 5,810 22715

* Volumes of water can be bought and sold more than once. Volumes listed above may repeat.

Transaction Type | Seller

Whole Entity WUG NAME

Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | ADAMS GARDEN IRRIGATION DISTRICT #19

HARLINGEN Total Volume 505 505 504 504 504 504 75248

Detail: Region: M County: CAMERONBasin: NUECES-RIO GRANDE

505 505 504 504 504 504 75249

IRRIGATION, CAMERON

Total Volume 5,823 5,820 5,818 5,815 5,813 5,810 22716

WUG Supplies Associated with Existing Direct Source Volume-In

7/25/2018 3:38 PM Page 2 of 95


Purchased | ADAMS GARDEN IRRIGATION DISTRICT #19

IRRIGATION, CAMERON


5,475 5,472 5,470 5,467 5,465 5,462 22717

Detail: Region: M County: CAMERONBasin: RIO GRANDE

348 348 348 348 348 348 22718

7/25/2018 3:38 PM Page 3 of 95



BROWNSVILLETransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




BROWNSVILLE IRRIGATION, CAMERON 882 882 882 882 882 882 77800

BROWNSVILLE MANUFACTURING, CAMERON 220 220 220 220 220 220 30235

BROWNSVILLE STEAM ELECTRIC POWER, CAMERON 125 125 125 125 125 125 30240




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct BROWNSVILLE Total Volume 32,617 32,616 32,616 32,615 32,615 32,614 14378


32,419 32,419 32,418 32,418 32,418 32,416 14379


198 197 198 197 197 198 14380


7/25/2018 3:38 PM Page 4 of 95


Purchased | BROWNSVILLE

IRRIGATION, CAMERON

Total Volume 882 882 882 882 882 882 77801


829 829 829 829 829 829 77802


53 53 53 53 53 53 77803

MANUFACTURING, CAMERON

Total Volume 220 220 220 220 220 220 30236


95 95 95 95 95 95 30237


125 125 125 125 125 125 66327

STEAM ELECTRIC POWER, CAMERON


121 121 121 121 121 121 30242

Total Volume 125 125 125 125 125 125 30241


4 4 4 4 4 4 66369

7/25/2018 3:38 PM Page 5 of 95



BROWNSVILLE IRRIGATION DISTRICTTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




BROWNSVILLE EL JARDIN WSC 1,500 1,500 1,500 1,500 1,500 1,500 58967

BROWNSVILLE IRRIGATION DISTRICT BROWNSVILLE 1,500 1,500 1,500 1,500 1,500 1,500 58951

BROWNSVILLE IRRIGATION DISTRICT

COUNTY-OTHER, CAMERON 227 227 227 227 227 227 11453

BROWNSVILLE IRRIGATION DISTRICT HIDALGO COUNTY WID #3 2,000 2,000 2,000 2,000 2,000 2,000 58861

BROWNSVILLE IRRIGATION DISTRICT IRRIGATION, CAMERON 10,550 10,545 10,541 10,536 10,532 10,527 19312

HIDALGO COUNTY WID #3 MCALLEN 1,800 1,800 1,800 1,800 1,800 1,800 64288




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


EL JARDIN WSC Total Volume 1,500 1,500 1,500 1,500 1,500 1,500 58968


1,457 1,457 1,457 1,457 1,457 1,457 58969


7/25/2018 3:38 PM Page 6 of 95



EL JARDIN WSC Detail: Region: M County: CAMERONBasin: RIO GRANDE

43 43 43 43 43 43 58970

Purchased | BROWNSVILLE IRRIGATION DISTRICT

COUNTY-OTHER, CAMERON

Total Volume 227 227 227 227 227 227 11454


226 226 226 226 226 226 11455


1 1 1 1 1 1 11456

IRRIGATION, CAMERON

Total Volume 10,550 10,545 10,541 10,536 10,532 10,527 19313


9,919 9,914 9,910 9,906 9,902 9,897 19314


631 631 631 630 630 630 19315

Purchased | HIDALGO COUNTY WID #3

MCALLEN Total Volume 1,800 1,800 1,800 1,800 1,800 1,800 64289

Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

1,800 1,800 1,800 1,800 1,800 1,800 64290

7/25/2018 3:38 PM Page 7 of 95



CAMERON COUNTY IRRIGATION DISTRICT #16Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




CAMERON COUNTY IRRIGATION DISTRICT #16 IRRIGATION, CAMERON 1,154 1,153 1,153 1,152 1,152 1,151 22269




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | CAMERON COUNTY IRRIGATION DISTRICT #16

IRRIGATION, CAMERON

Total Volume 1,154 1,153 1,153 1,152 1,152 1,151 22270


1,085 1,084 1,084 1,083 1,083 1,082 22271


69 69 69 69 69 69 22272


7/25/2018 3:38 PM Page 8 of 95







CAMERON COUNTY IRRIGATION DISTRICT #2


CAMERON COUNTY IRRIGATION DISTRICT #2 EAST RIO HONDO WSC 2,642 2,642 2,642 2,642 2,642 2,642 63135



RIO GRANDE VALLEY WATER MARKET 6,000 6,000 6,000 6,000 6,000 6,000 77856

CAMERON COUNTY IRRIGATION DISTRICT #2 RIO HONDO 712 712 712 712 712 712 13948

CAMERON COUNTY IRRIGATION DISTRICT #2 SAN BENITO 5,626 5,626 5,626 5,626 5,626 5,626 13953


STEAM ELECTRIC POWER, CAMERON 0 0 0 0 0 0 15486

EAST RIO HONDO WSC COUNTY-OTHER, CAMERON 51 51 51 51 51 51 64873

EAST RIO HONDO WSC MILITARY HIGHWAY WSC 28 28 28 28 28 28 63142

NORTH ALAMO WSC PORT MANSFIELD PUD 77923

NORTH ALAMO WSC PRIMERA 77917

NORTH ALAMO WSC SAN JUAN 77920

RIO GRANDE VALLEY WATER MARKET NORTH ALAMO WSC 4,000 4,000 4,000 4,000 4,000 4,000 77912


7/25/2018 3:38 PM Page 9 of 95




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId



Total Volume 578 578 578 578 578 578 13926


577 577 577 577 577 577 13927


1 1 1 1 1 1 13928

EAST RIO HONDO WSC

Total Volume 2,563 2,563 2,563 2,563 2,563 2,563 63136


2,560 2,560 2,560 2,559 2,560 2,560 63137

Detail: Region: M County: WILLACYBasin: NUECES-RIO GRANDE

3 3 3 4 3 3 63138

IRRIGATION, CAMERON

Total Volume 54,048 54,024 54,001 53,977 53,953 53,930 13938


50,814 50,792 50,770 50,748 50,725 50,703 13939


3,234 3,232 3,231 3,229 3,228 3,227 13940

RIO HONDO Total Volume 712 712 712 712 712 712 13949


7/25/2018 3:38 PM Page 10 of 95



RIO HONDO Detail: Region: M County: CAMERONBasin: NUECES-RIO GRANDE

712 712 712 712 712 712 13950

SAN BENITO Total Volume 5,626 5,626 5,626 5,626 5,626 5,626 13954


5,626 5,626 5,626 5,626 5,626 5,626 13955

STEAM ELECTRIC POWER, CAMERON

Total Volume 0 0 0 0 0 0 15487


0 0 0 0 0 0 15488


66367

Purchased | EAST RIO HONDO WSC


Total Volume 51 51 51 51 51 51 64874


49 49 49 49 49 49 64875


2 2 2 2 2 2 64876

MILITARY HIGHWAY WSC

Total Volume 28 28 28 28 28 28 64425


16 16 16 16 16 16 64426


0 0 0 0 0 0 64427

7/25/2018 3:38 PM Page 11 of 95





12 12 12 12 12 12 64428

Detail: Region: M County: HIDALGOBasin: RIO GRANDE

0 0 0 0 0 0 64429

Purchased | NORTH ALAMO WSC

PORT MANSFIELD PUD

Total Volume 77924


77925

PRIMERA Total Volume 77918


77919

SAN JUAN Total Volume 77921


77922

Purchased | RIO GRANDE VALLEY WATER MARKET

NORTH ALAMO WSC

Total Volume 77913


77914


77915

7/25/2018 3:38 PM Page 12 of 95



NORTH ALAMO WSC


77916

7/25/2018 3:38 PM Page 13 of 95







BAYVIEW IRRIGATION DISTRICT #11


BAYVIEW IRRIGATION DISTRICT #11 IRRIGATION, CAMERON 5,121 5,119 5,116 5,114 5,112 5,110 19326

BAYVIEW IRRIGATION DISTRICT #11

LAGUNA MADRE WATER DISTRICT 4,869 4,869 4,869 4,869 4,869 4,869 57379


BAYVIEW IRRIGATION DISTRICT #11 15,320 15,317 15,313 15,310 15,306 15,303 75454


CAMERON COUNTY IRRIGATION DISTRICT #6 BROWNSVILLE 263 263 263 263 263 263 33708


CAMERON COUNTY IRRIGATION DISTRICT #10 18,970 18,965 18,960 18,955 18,950 18,945 47836


CAMERON COUNTY IRRIGATION DISTRICT #6 LOS FRESNOS 715 715 715 715 715 715 33700

CAMERON COUNTY IRRIGATION DISTRICT #6 OLMITO WSC 1,051 1,051 1,051 1,051 1,051 1,051 19356



7/25/2018 3:38 PM Page 14 of 95




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | BAYVIEW IRRIGATION DISTRICT #11


Total Volume 121 121 121 121 121 121 66127


121 121 121 121 121 121 66129

IRRIGATION, CAMERON

Total Volume 5,121 5,119 5,116 5,114 5,112 5,110 19327


4,815 4,813 4,810 4,808 4,806 4,804 19328


306 306 306 306 306 306 19329

LAGUNA MADRE WATER DISTRICT

Total Volume 4,869 4,869 4,869 4,869 4,869 4,869 66461


4,869 4,869 4,869 4,869 4,869 4,869 66463


IRRIGATION, CAMERON

Total Volume 2,482 2,481 2,480 2,479 2,478 2,477 47866


2,334 2,333 2,332 2,331 2,330 2,329 47867


148 148 148 148 148 148 47868


BROWNSVILLE Total Volume

263 263 263 263 263 263 33709

7/25/2018 3:38 PM Page 15 of 95



BROWNSVILLE Detail: Region: M County: CAMERONBasin: NUECES-RIO GRANDE

261 261 261 261 261 261 33710


2 2 2 2 2 2 33711

IRRIGATION, CAMERON

Total Volume 15,403 15,396 15,389 15,383 15,376 15,369 33806


14,481 14,475 14,468 14,463 14,456 14,449 33807


922 921 921 920 920 920 33808

LOS FRESNOS Total Volume 715 715 715 715 715 715 33701


715 715 715 715 715 715 33702

OLMITO WSC Total Volume 1,051 1,051 1,051 1,051 1,051 1,051 19357


1,051 1,051 1,051 1,051 1,051 1,051 19358

7/25/2018 3:38 PM Page 16 of 95



COUNTY-OTHER, CAMERONTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId

Direct Source Volume-In 45 45 45 45 45 45 77808


* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, CAMERON

Total Volume 45 45 45 45 45 45 77809


44 44 44 44 44 44 77810


1 1 1 1 1 1 77811


7/25/2018 3:38 PM Page 17 of 95



COUNTY-OTHER, HIDALGOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, HIDALGO

Total Volume 114 114 114 114 114 114 77813


108 108 108 108 108 108 77814


6 6 6 6 6 6 77815


7/25/2018 3:38 PM Page 18 of 95



COUNTY-OTHER, MAVERICKTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, MAVERICK

Total Volume 176 176 176 176 176 176 77817

Detail: Region: M County: MAVERICKBasin: NUECES

1 1 1 1 1 1 77818

Detail: Region: M County: MAVERICKBasin: RIO GRANDE

175 175 175 175 175 175 77819


7/25/2018 3:38 PM Page 19 of 95



COUNTY-OTHER, STARRTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, STARR

Total Volume 249 249 249 249 249 249 62271

Detail: Region: M County: STARRBasin: NUECES-RIO GRANDE

11 11 11 11 11 11 62272

Detail: Region: M County: STARRBasin: RIO GRANDE

238 238 238 238 238 238 62273


7/25/2018 3:38 PM Page 20 of 95



COUNTY-OTHER, WILLACYTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, WILLACY

Total Volume 123 123 123 123 123 123 77826


123 123 123 123 123 123 77827


7/25/2018 3:38 PM Page 21 of 95



COUNTY-OTHER, ZAPATATransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct COUNTY-OTHER, ZAPATA

Total Volume 63 63 63 63 63 63 77829

Detail: Region: M County: ZAPATABasin: RIO GRANDE

63 63 63 63 63 63 77830


7/25/2018 3:38 PM Page 22 of 95



DELTA LAKE IRRIGATION DISTRICTTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




DELTA LAKE IRRIGATION DISTRICT

COUNTY-OTHER, HIDALGO 360 360 360 360 360 360 13964

DELTA LAKE IRRIGATION DISTRICT COUNTY-OTHER, WILLACY 60 60 60 60 60 60 13970


ENGLEMAN IRRIGATION DISTRICT 7,874 7,871 7,868 7,864 7,861 7,957 30728

DELTA LAKE IRRIGATION DISTRICT IRRIGATION, HIDALGO 27,268 27,256 27,244 27,232 27,220 27,208 30778

DELTA LAKE IRRIGATION DISTRICT IRRIGATION, WILLACY 20,824 20,815 20,806 20,796 20,787 20,778 13981

DELTA LAKE IRRIGATION DISTRICT LYFORD 290 314 338 367 399 431 13986

DELTA LAKE IRRIGATION DISTRICT NORTH ALAMO WSC 5,236 5,236 5,236 5,236 5,236 5,236 64328

DELTA LAKE IRRIGATION DISTRICT RAYMONDVILLE 3,463 3,463 3,463 3,463 3,463 3,463 13998




VALLEY ACRES IRRIGATION DISTRICT 7,460 7,457 7,454 7,450 7,447 7,444 30725

ENGLEMAN IRRIGATION DISTRICT IRRIGATION, HIDALGO 5,591 5,588 5,586 5,584 5,581 5,579 47881

NORTH ALAMO WSC PORT MANSFIELD PUD 90 90 90 90 90 90 77119

NORTH ALAMO WSC PRIMERA 100 100 100 100 100 100 64333

7/25/2018 3:38 PM Page 23 of 95



RIO GRANDE VALLEY WATER MARKET MISSION 1,500 1,500 1,500 1,500 1,500 1,500 77894

VALLEY ACRES IRRIGATION DISTRICT IRRIGATION, CAMERON 676 676 676 676 675 675 47891

VALLEY ACRES IRRIGATION DISTRICT IRRIGATION, HIDALGO 4,334 4,332 4,330 4,329 4,327 4,325 47897

VALLEY ACRES IRRIGATION DISTRICT

MANUFACTURING, HIDALGO 62 62 62 62 62 62 33596




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | DELTA LAKE IRRIGATION DISTRICT

COUNTY-OTHER, HIDALGO

Total Volume 360 360 360 360 360 360 13965


351 351 351 351 351 351 13966


9 9 9 9 9 9 13967

COUNTY-OTHER, WILLACY

Total Volume 60 60 60 60 60 60 13971


60 60 60 60 60 60 13972

IRRIGATION, HIDALGO

Total Volume 27,268 27,256 27,244 27,232 27,220 27,208 30779


26,179 26,167 26,156 26,144 26,133 26,121 30780


7/25/2018 3:38 PM Page 24 of 95


Purchased | DELTA LAKE IRRIGATION DISTRICT

IRRIGATION, HIDALGO


1,089 1,089 1,088 1,088 1,087 1,087 30781

IRRIGATION, WILLACY

Total Volume 20,824 20,815 20,806 20,796 20,787 20,778 13982


20,824 20,815 20,806 20,796 20,787 20,778 13983

LYFORD Total Volume 290 314 338 367 399 431 13987


290 314 338 367 399 431 13988

NORTH ALAMO WSC

Total Volume 5,046 5,046 5,046 5,046 5,046 5,046 64329


133 133 134 134 134 134 64330


4,727 4,743 4,754 4,761 4,767 4,772 64331


186 170 158 151 145 140 64332

RAYMONDVILLE Total Volume 3,463 3,463 3,463 3,463 3,463 3,463 13999


3,463 3,463 3,463 3,463 3,463 3,463 14000

7/25/2018 3:38 PM Page 25 of 95


Purchased | ENGLEMAN IRRIGATION DISTRICT

IRRIGATION, HIDALGO

Total Volume 5,591 5,588 5,586 5,584 5,581 5,579 47882


5,368 5,365 5,363 5,361 5,358 5,356 47883


223 223 223 223 223 223 47884


PORT MANSFIELD PUD

Total Volume 90 90 90 90 90 90 77120


90 90 90 90 90 90 77121

PRIMERA Total Volume 100 100 100 100 100 100 64334


100 100 100 100 100 100 64335


MISSION Total Volume 77895


77896


77897

Purchased | VALLEY ACRES IRRIGATION DISTRICT

IRRIGATION, CAMERON

Total Volume 676 676 676 676 675 675 47892


636 636 636 636 635 635 47893

7/25/2018 3:38 PM Page 26 of 95


Purchased | VALLEY ACRES IRRIGATION DISTRICT

IRRIGATION, CAMERON


40 40 40 40 40 40 47894

IRRIGATION, HIDALGO

Total Volume 4,334 4,332 4,330 4,329 4,327 4,325 47898


4,161 4,159 4,157 4,156 4,154 4,152 47899


173 173 173 173 173 173 47900

MANUFACTURING, HIDALGO

Total Volume 62 62 62 62 62 62 33597


62 62 62 62 62 62 33598

7/25/2018 3:38 PM Page 27 of 95



DONNA IRRIGATION DISTRICT-HIDALGO COUNTY #1Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




DONNA IRRIGATION DISTRICT-HIDALGO COUNTY #1

DONNA 3,131 3,131 3,131 3,131 3,131 3,131 15608


IRRIGATION, HIDALGO 30,521 30,507 30,494 30,481 30,467 30,454 15613


NORTH ALAMO WSC 1,910 1,910 1,910 1,910 1,910 1,910 44309


NORTH ALAMO WSC SAN JUAN 50 50 50 50 50 50 57996




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | DONNA IRRIGATION DISTRICT-HIDALGO COUNTY #1

DONNA Total Volume

3,131 3,131 3,131 3,131 3,131 3,131 15609


7/25/2018 3:38 PM Page 28 of 95


Purchased | DONNA IRRIGATION DISTRICT-HIDALGO COUNTY #1

DONNA Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

3,131 3,131 3,131 3,131 3,131 3,131 15610

IRRIGATION, HIDALGO

Total Volume 30,521 30,507 30,494 30,481 30,467 30,454 15614


29,302 29,288 29,276 29,264 29,250 29,238 15615


1,219 1,219 1,218 1,217 1,217 1,216 15616

NORTH ALAMO WSC

Total Volume 1,820 1,820 1,820 1,820 1,820 1,820 44310


48 48 48 48 48 48 44311


1,705 1,711 1,715 1,718 1,720 1,722 44312


67 61 57 54 52 50 44313




40 40 40 40 40 40 64528


7/25/2018 3:38 PM Page 29 of 95



SAN JUAN Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

57998

7/25/2018 3:38 PM Page 30 of 95



EAGLE PASSTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct EAGLE PASS Total Volume 7,903 7,903 7,903 7,903 7,902 7,902 14204


7,903 7,903 7,903 7,903 7,902 7,902 14205


7/25/2018 3:38 PM Page 31 of 95



FALCON RURAL WSCTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct FALCON RURAL WSC

Total Volume 309 309 309 309 309 309 77792


309 309 309 309 309 309 77793


7/25/2018 3:38 PM Page 32 of 95



HARLINGEN IRRIGATION DISTRICT-CAMERON COUNTY #1Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




EAST RIO HONDO WSC MILITARY HIGHWAY WSC 2 2 2 2 2 2 19568

EAST RIO HONDO WSC OLMITO WSC 71 71 71 71 71 71 77271

HARLINGEN COMBES 366 366 397 445 498 554 19299

HARLINGEN EAST RIO HONDO WSC 293 293 293 293 293 293 19267

HARLINGEN PALM VALLEY 266 266 266 266 266 266 19462

HARLINGEN PRIMERA 340 340 340 380 450 523 19451

HARLINGEN IRRIGATION DISTRICT-CAMERON COUNTY #1

HARLINGEN 20,406 20,406 20,406 20,406 20,406 20,406 19261


IRRIGATION, CAMERON 38,159 38,142 38,125 38,109 38,092 38,075 19284


LA FERIA IRRIGATION DISTRICT-CAMERON COUNTY #3

86 86 85 85 85 85 57950


MILITARY HIGHWAY WSC 537 537 537 537 537 537 58894



7/25/2018 3:38 PM Page 33 of 95




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId



Total Volume 2 2 2 2 2 2 64443


1 1 1 1 1 1 64444


0 0 0 0 0 0 64445


1 1 1 1 1 1 64446


0 0 0 0 0 0 64447

OLMITO WSC Total Volume 71 71 71 71 71 71 77272


71 71 71 71 71 71 77273

Purchased | HARLINGEN

COMBES Total Volume 366 366 397 445 498 554 19300


366 366 397 445 498 554 19301

EAST RIO HONDO WSC

Total Volume 220 220 220 220 220 220 19268


220 220 220 220 220 220 19269

7/25/2018 3:38 PM Page 34 of 95


Purchased | HARLINGEN

EAST RIO HONDO WSC


0 0 0 0 0 0 19270

PALM VALLEY Total Volume 266 266 266 266 266 266 19463


266 266 266 266 266 266 19464



340 340 340 380 450 523 19453

Purchased | HARLINGEN IRRIGATION DISTRICT-CAMERON COUNTY #1

HARLINGEN Total Volume 17,266 17,266 17,266 17,266 17,266 17,266 19262


17,266 17,266 17,266 17,266 17,266 17,266 19263

IRRIGATION, CAMERON

Total Volume 38,159 38,142 38,125 38,109 38,092 38,075 19285


35,876 35,860 35,844 35,829 35,813 35,797 19286


2,283 2,282 2,281 2,280 2,279 2,278 19287


Total Volume 537 537 537 537 537 537 58895


292 292 292 292 292 292 58896

7/25/2018 3:38 PM Page 35 of 95


Purchased | HARLINGEN IRRIGATION DISTRICT-CAMERON COUNTY #1



2 2 2 2 2 2 58897


238 238 238 238 238 238 58898


5 5 5 5 5 5 58899

7/25/2018 3:38 PM Page 36 of 95



HIDALGOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct HIDALGO Total Volume 142 142 142 142 142 142 14225


141 141 141 141 141 141 14226


1 1 1 1 1 1 14227


7/25/2018 3:38 PM Page 37 of 95



HIDALGO COUNTY IRRIGATION DISTRICT #1Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




HIDALGO COUNTY IRRIGATION DISTRICT #1 EDINBURG 6,741 6,741 6,741 6,741 6,741 6,741 48441

HIDALGO COUNTY IRRIGATION DISTRICT #1

HIDALGO COUNTY IRRIGATION DISTRICT #13 1,991 1,990 1,989 1,989 1,988 1,987 48491

HIDALGO COUNTY IRRIGATION DISTRICT #1 HIDALGO COUNTY MUD 1 606 606 605 605 605 604 48449

HIDALGO COUNTY IRRIGATION DISTRICT #1 IRRIGATION, HIDALGO 24,036 24,026 24,015 24,005 23,994 23,984 44461

HIDALGO COUNTY IRRIGATION DISTRICT #1 MCALLEN 2,840 2,840 2,840 2,840 2,840 2,840 48468

HIDALGO COUNTY IRRIGATION DISTRICT #1 NORTH ALAMO WSC 1,235 1,235 1,235 1,235 1,235 1,235 44368


SANTA CRUZ IRRIGATION DISTRICT #15 35,086 35,071 35,056 35,041 35,026 35,011 48476

HIDALGO COUNTY IRRIGATION DISTRICT #1 SHARYLAND WSC 10,033 10,033 10,033 10,033 10,033 10,033 44453



SANTA CRUZ IRRIGATION DISTRICT #15 IRRIGATION, HIDALGO 20,530 20,521 20,512 20,503 20,494 20,485 48477

SANTA CRUZ IRRIGATION DISTRICT #15 NORTH ALAMO WSC 449 449 449 449 449 449 48481

7/25/2018 3:38 PM Page 38 of 95



SANTA CRUZ IRRIGATION DISTRICT #15 SHARYLAND WSC 1,200 1,200 1,200 1,200 1,200 1,200 48486




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | HIDALGO COUNTY IRRIGATION DISTRICT #1

EDINBURG Total Volume 6,741 6,741 6,741 6,741 6,741 6,741 48442


6,741 6,741 6,741 6,741 6,741 6,741 48443

HIDALGO COUNTY MUD 1

Total Volume 606 606 605 605 605 604 48450


606 606 605 605 605 604 48451

IRRIGATION, HIDALGO

Total Volume 24,036 24,026 24,015 24,005 23,994 23,984 44462


23,076 23,066 23,056 23,046 23,036 23,026 44463


960 960 959 959 958 958 44464



2,840 2,840 2,840 2,840 2,840 2,840 48470


7/25/2018 3:38 PM Page 39 of 95



NORTH ALAMO WSC

Total Volume 885 885 885 885 885 885 44369


23 23 23 23 23 24 44370


829 832 834 836 837 836 44371


33 30 28 26 25 25 44372

SHARYLAND WSC Total Volume 10,033 10,033 10,033 10,033 10,033 10,033 44454


10,033 10,033 10,033 10,033 10,033 10,033 44455


IRRIGATION, HIDALGO

Total Volume 1,414 1,413 1,412 1,412 1,411 1,411 48493


1,358 1,357 1,356 1,356 1,355 1,355 48494


56 56 56 56 56 56 48495

Purchased | SANTA CRUZ IRRIGATION DISTRICT #15

IRRIGATION, HIDALGO

Total Volume 20,530 20,521 20,512 20,503 20,494 20,485 48478


19,710 19,701 19,693 19,684 19,675 19,667 48479

7/25/2018 3:38 PM Page 40 of 95


Purchased | SANTA CRUZ IRRIGATION DISTRICT #15

IRRIGATION, HIDALGO


820 820 819 819 819 818 48480

NORTH ALAMO WSC

Total Volume 99 99 99 99 99 99 48482


3 3 3 3 3 3 48483


92 93 93 93 93 93 48484


4 3 3 3 3 3 48485



1,200 1,200 1,200 1,200 1,200 1,200 48488

7/25/2018 3:38 PM Page 41 of 95







HIDALGO COUNTY IRRIGATION DISTRICT #16 AGUA SUD 2,986 2,986 2,986 2,986 2,986 2,986 14278


COUNTY-OTHER, HIDALGO 71 71 71 71 71 71 51720


HIDALGO COUNTY IRRIGATION DISTRICT #16 LA JOYA 364 364 364 364 364 364 51145

HIDALGO COUNTY IRRIGATION DISTRICT #16 MINING, HIDALGO 65 65 65 65 65 65 33565




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


AGUA SUD Total Volume 2,986 2,986 2,986 2,986 2,986 2,986 14279


2,498 2,498 2,498 2,497 2,497 2,498 14280


7/25/2018 3:38 PM Page 42 of 95



AGUA SUD Detail: Region: M County: HIDALGOBasin: RIO GRANDE

474 474 474 475 475 474 14281


14 14 14 14 14 14 14282


Total Volume 71 71 71 71 71 71 51721


69 69 69 69 69 69 51722


2 2 2 2 2 2 51723

IRRIGATION, HIDALGO

Total Volume 9,977 9,973 9,968 9,964 9,960 9,955 52014


9,578 9,575 9,570 9,566 9,562 9,557 52015


399 398 398 398 398 398 52016

LA JOYA Total Volume 364 364 364 364 364 364 51146


288 288 288 288 288 288 51147


76 76 76 76 76 76 51148

MINING, HIDALGO Total Volume 65 65 65 65 65 65 33566

7/25/2018 3:38 PM Page 43 of 95



MINING, HIDALGO Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

60 60 60 60 60 60 33567


5 5 5 5 5 5 33568

7/25/2018 3:38 PM Page 44 of 95











Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


IRRIGATION, HIDALGO

Total Volume 2,682 2,681 2,680 2,679 2,677 2,676 62728


2,575 2,574 2,573 2,572 2,570 2,569 62729


107 107 107 107 107 107 62730


7/25/2018 3:38 PM Page 45 of 95







HIDALGO COUNTY IRRIGATION DISTRICT #2 ALAMO 1,806 1,806 1,806 1,806 1,806 1,806 13861

HIDALGO COUNTY IRRIGATION DISTRICT #2 EDINBURG 3,458 3,458 3,458 3,458 3,458 3,458 63528

HIDALGO COUNTY IRRIGATION DISTRICT #2 HIDALGO COUNTY WID #3 252 252 252 252 252 252 74991


HIDALGO COUNTY IRRIGATION DISTRICT #2 MCALLEN 6,409 6,409 6,409 6,409 6,409 6,409 13893

HIDALGO COUNTY IRRIGATION DISTRICT #2 NORTH ALAMO WSC 2,575 2,573 2,571 2,569 2,568 2,566 64379

HIDALGO COUNTY IRRIGATION DISTRICT #2 PHARR 8,512 8,512 8,512 8,512 8,512 8,512 13913



HIDALGO COUNTY IRRIGATION DISTRICT #2 SAN JUAN 1,915 1,915 1,915 1,915 1,914 1,914 13919

HIDALGO COUNTY WID #3 IRRIGATION, HIDALGO 227 227 227 227 227 227 74992


RIO GRANDE VALLEY WATER MARKET MISSION 1,500 1,500 1,500 1,500 1,500 1,500 77898


7/25/2018 3:38 PM Page 46 of 95




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


ALAMO Total Volume 1,806 1,806 1,806 1,806 1,806 1,806 13862


1,806 1,806 1,806 1,806 1,806 1,806 13863

EDINBURG Total Volume 3,458 3,458 3,458 3,458 3,458 3,458 63529


3,458 3,458 3,458 3,458 3,458 3,458 63530

IRRIGATION, HIDALGO

Total Volume 50,374 50,352 50,330 50,308 50,286 50,264 13878


48,362 48,341 48,320 48,299 48,277 48,256 13879


2,012 2,011 2,010 2,009 2,009 2,008 13880



6,409 6,409 6,409 6,409 6,409 6,409 13895

NORTH ALAMO WSC

Total Volume 2,525 2,523 2,521 2,519 2,518 2,516 64380


66 67 67 67 67 67 64381


7/25/2018 3:38 PM Page 47 of 95



NORTH ALAMO WSC


2,366 2,371 2,375 2,377 2,379 2,379 64382


93 85 79 75 72 70 64383

PHARR Total Volume 8,512 8,512 8,512 8,512 8,512 8,512 13914


8,509 8,510 8,510 8,510 8,510 8,510 13915


3 2 2 2 2 2 13916

SAN JUAN Total Volume 1,915 1,915 1,915 1,915 1,914 1,914 13920


1,915 1,915 1,915 1,915 1,914 1,914 13921


IRRIGATION, HIDALGO

Total Volume 227 227 227 227 227 227 74993


218 218 218 218 218 218 74994


9 9 9 9 9 9 74995


MISSION Total Volume77899

7/25/2018 3:38 PM Page 48 of 95



MISSION Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

77900


77901

7/25/2018 3:38 PM Page 49 of 95











Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


IRRIGATION, HIDALGO

Total Volume 4,710 4,707 4,705 4,703 4,701 4,699 48219


4,522 4,519 4,517 4,515 4,513 4,511 48220


188 188 188 188 188 188 48221


7/25/2018 3:38 PM Page 50 of 95







HIDALGO COUNTY IRRIGATION DISTRICT #6 AGUA SUD 5,904 5,904 5,904 5,904 5,904 5,904 52476





Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


AGUA SUD Total Volume 5,904 5,904 5,904 5,904 5,904 5,904 52477


4,939 4,939 4,939 4,939 4,939 4,939 52478


938 938 938 938 938 938 52479


7/25/2018 3:38 PM Page 51 of 95



AGUA SUD Detail: Region: M County: STARRBasin: RIO GRANDE

27 27 27 27 27 27 52480

IRRIGATION, HIDALGO

Total Volume 10,679 10,675 10,670 10,665 10,661 10,656 48280


10,252 10,249 10,244 10,239 10,235 10,230 48281


427 426 426 426 426 426 48282

7/25/2018 3:38 PM Page 52 of 95



HIDALGO COUNTY WCID #18Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




HIDALGO COUNTY WCID #18 IRRIGATION, HIDALGO 729 727 726 725 723 722 58990




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | HIDALGO COUNTY WCID #18

IRRIGATION, HIDALGO

Total Volume 729 727 726 725 723 722 58991


700 698 697 696 694 693 58992


29 29 29 29 29 29 58993


7/25/2018 3:38 PM Page 53 of 95



HIDALGO COUNTY WID #3Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




HIDALGO COUNTY WID #3 IRRIGATION, HIDALGO 3,518 3,516 3,515 3,513 3,511 3,510 48306

HIDALGO COUNTY WID #3 MCALLEN 13,688 13,688 13,688 13,688 13,688 13,688 64307

HIDALGO COUNTY WID #3 MINING, HIDALGO 41 41 41 41 41 41 48329




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


IRRIGATION, HIDALGO

Total Volume 3,518 3,516 3,515 3,513 3,511 3,510 48307


3,377 3,376 3,375 3,373 3,371 3,370 48308


141 140 140 140 140 140 48309



7/25/2018 3:38 PM Page 54 of 95



MCALLEN Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

13,688 13,688 13,688 13,688 13,688 13,688 64309

MINING, HIDALGO Total Volume 41 41 41 41 41 41 48330


38 38 38 38 38 38 48331


3 3 3 3 3 3 48332

7/25/2018 3:38 PM Page 55 of 95



HIDALGO-CAMERON COUNTY IRRIGATION DISTRICT #9Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




HIDALGO-CAMERON COUNTY IRRIGATION DISTRICT #9



COUNTY-OTHER, HIDALGO 2,168 2,168 2,168 2,168 2,168 2,168 43981


EDCOUCH 263 263 263 263 263 263 43985


ELSA 791 791 791 791 791 791 43988




IRRIGATION, HIDALGO 51,008 50,986 50,964 50,941 50,919 50,897 43995


LA VILLA 236 236 236 236 236 236 44014


MERCEDES 2,267 2,267 2,267 2,267 2,267 2,267 44017

7/25/2018 3:38 PM Page 56 of 95




NORTH ALAMO WSC 3,929 3,929 3,929 3,929 3,929 3,929 58902


WESLACO 5,583 5,583 5,583 5,583 5,583 5,583 43999

MILITARY HIGHWAY WSC SAN JUAN 10 10 10 10 10 10 77684



WESLACO MILITARY HIGHWAY WSC 175 175 175 175 175 175 44002




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | HIDALGO-CAMERON COUNTY IRRIGATION DISTRICT #9


Total Volume 158 158 158 158 158 158 43978


157 157 157 157 157 157 43979


1 1 1 1 1 1 43980


Total Volume 2,168 2,168 2,168 2,168 2,168 2,168 43982


2,112 2,112 2,112 2,112 2,112 2,112 43983


56 56 56 56 56 56 43984


7/25/2018 3:38 PM Page 57 of 95



EDCOUCH Total Volume 263 263 263 263 263 263 43986


263 263 263 263 263 263 43987

ELSA Total Volume 791 791 791 791 791 791 43989


791 791 791 791 791 791 43990

IRRIGATION, CAMERON

Total Volume 4,076 4,074 4,073 4,071 4,069 4,067 43992


3,832 3,830 3,829 3,827 3,826 3,824 43993


244 244 244 244 243 243 43994

IRRIGATION, HIDALGO

Total Volume 51,008 50,986 50,964 50,941 50,919 50,897 43996


48,971 48,949 48,928 48,906 48,885 48,864 43997


2,037 2,037 2,036 2,035 2,034 2,033 43998

LA VILLA Total Volume 236 236 236 236 236 236 44015


236 236 236 236 236 236 44016

MERCEDES Total Volume 2,267 2,267 2,267 2,267 2,267 2,267 44018

7/25/2018 3:38 PM Page 58 of 95



MERCEDES Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

2,267 2,267 2,267 2,267 2,267 2,267 44019

NORTH ALAMO WSC

Total Volume 3,634 3,634 3,634 3,634 3,634 3,634 58903


96 96 96 96 96 97 58904


3,404 3,416 3,424 3,429 3,434 3,436 58905


134 122 114 109 104 101 58906

WESLACO Total Volume 5,408 5,408 5,408 5,408 5,408 5,408 44000


5,408 5,408 5,408 5,408 5,408 5,408 44001

Purchased | MILITARY HIGHWAY WSC



77686




45 45 45 45 45 45 64530


7/25/2018 3:38 PM Page 59 of 95



SAN JUAN Detail: Region: M County: HIDALGOBasin: NUECES-RIO GRANDE

58930

Purchased | WESLACO


Total Volume 165 165 165 165 165 165 56426


90 90 90 90 90 90 56427


1 1 1 1 1 1 56428


73 73 73 73 73 73 56429


1 1 1 1 1 1 56430

7/25/2018 3:38 PM Page 60 of 95



IRRIGATION, CAMERONTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, CAMERON

Total Volume 9,762 9,740 9,717 9,694 9,671 9,648 63292


9,178 9,157 9,136 9,114 9,092 9,071 63293


584 583 581 580 579 577 63294


7/25/2018 3:38 PM Page 61 of 95



IRRIGATION, HIDALGOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, HIDALGO

Total Volume 9,668 9,640 9,611 9,582 9,554 9,525 63296


9,282 9,255 9,227 9,199 9,172 9,145 63297


386 385 384 383 382 380 63298


7/25/2018 3:38 PM Page 62 of 95



IRRIGATION, MAVERICKTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, MAVERICK

Total Volume 1,130 1,130 1,130 1,130 1,130 1,130 77832


1,130 1,130 1,130 1,130 1,130 1,130 77833


7/25/2018 3:38 PM Page 63 of 95



IRRIGATION, STARRTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, STARR

Total Volume 8,508 8,493 8,478 8,463 8,449 8,434 49019


8,508 8,493 8,478 8,463 8,449 8,434 49020


7/25/2018 3:38 PM Page 64 of 95



IRRIGATION, WEBBTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, WEBB Total Volume 12,020 12,011 12,002 11,993 11,984 11,975 52059

Detail: Region: M County: WEBBBasin: RIO GRANDE

12,020 12,011 12,002 11,993 11,984 11,975 52060


7/25/2018 3:38 PM Page 65 of 95



IRRIGATION, WILLACYTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, WILLACY

Total Volume 132 131 131 131 131 130 64284


132 131 131 131 131 130 64285


7/25/2018 3:38 PM Page 66 of 95



IRRIGATION, ZAPATATransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct IRRIGATION, ZAPATA

Total Volume 3,396 3,391 3,385 3,380 3,374 3,369 52056


3,396 3,391 3,385 3,380 3,374 3,369 52057


7/25/2018 3:38 PM Page 67 of 95



LA FERIA IRRIGATION DISTRICT-CAMERON COUNTY #3Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId









LA FERIA 1,125 1,274 1,432 1,612 1,808 2,011 22798


SANTA ROSA 612 612 612 612 612 612 22803


SEBASTIAN MUD 204 204 204 204 204 204 22811




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId


7/25/2018 3:38 PM Page 68 of 95


Purchased | LA FERIA IRRIGATION DISTRICT-CAMERON COUNTY #3


Total Volume 612 612 612 612 612 612 30222


611 611 611 611 611 611 30223


1 1 1 1 1 1 30224

IRRIGATION, CAMERON

Total Volume 26,666 26,654 26,642 26,631 26,619 26,607 22793


25,071 25,059 25,048 25,038 25,026 25,015 22794


1,595 1,595 1,594 1,593 1,593 1,592 22795

LA FERIA Total Volume 1,125 1,274 1,432 1,612 1,808 2,011 22799


1,125 1,274 1,432 1,612 1,808 2,011 22800

SANTA ROSA Total Volume 612 612 612 612 612 612 22804


612 612 612 612 612 612 22805

SEBASTIAN MUD Total Volume 204 204 204 204 204 204 22812


204 204 204 204 204 204 22813

7/25/2018 3:38 PM Page 69 of 95



LA GRULLATransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct LA GRULLA Total Volume 600 600 600 600 600 600 14229


600 600 600 600 600 600 14230


7/25/2018 3:38 PM Page 70 of 95



LAREDOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




LAREDO IRRIGATION, WEBB 1,785 1,783 1,781 1,779 1,777 1,775 76141

LAREDO RIO GRANDE VALLEY WATER MARKET 10,000 8,000 0 0 0 0 77874




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct LAREDO Total Volume 48,759 50,759 58,759 58,759 58,759 58,759 14236


48,759 50,759 58,759 58,759 58,759 58,759 14237

Purchased | LAREDO

IRRIGATION, WEBB Total Volume 1,785 1,783 1,781 1,779 1,777 1,775 76142


1,785 1,783 1,781 1,779 1,777 1,775 76143


7/25/2018 3:38 PM Page 71 of 95



MANUFACTURING, CAMERONTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MANUFACTURING, CAMERON

Total Volume 5 5 5 5 5 5 66131


2 2 2 2 2 2 66132


3 3 3 3 3 3 66328


7/25/2018 3:38 PM Page 72 of 95



MANUFACTURING, HIDALGOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MANUFACTURING, HIDALGO

Total Volume 2,240 2,240 2,240 2,240 2,240 2,240 77835


2,240 2,240 2,240 2,240 2,240 2,240 77836


7/25/2018 3:38 PM Page 73 of 95



MANUFACTURING, WEBBTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MANUFACTURING, WEBB

Total Volume 8 8 8 8 8 8 77838

Detail: Region: M County: WEBBBasin: NUECES

1 2 2 2 2 2 77839


7 6 6 6 6 6 77840


7/25/2018 3:38 PM Page 74 of 95



MAVERICK COUNTY WCID #1Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




MAVERICK COUNTY WCID #1

COUNTY-OTHER, MAVERICK 627 627 627 627 627 627 56786

MAVERICK COUNTY WCID #1 IRRIGATION, MAVERICK 41,305 41,287 41,269 41,251 41,233 41,215 48395

MAVERICK COUNTY WCID #1 MAVERICK COUNTY 429 429 429 429 429 429 76011




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | MAVERICK COUNTY WCID #1

COUNTY-OTHER, MAVERICK

Total Volume 627 627 627 627 627 627 56787


3 4 4 3 3 4 56788


624 623 623 624 624 623 56789


7/25/2018 3:38 PM Page 75 of 95


Purchased | MAVERICK COUNTY WCID #1

IRRIGATION, MAVERICK

Total Volume 41,305 41,287 41,269 41,251 41,233 41,215 48396


41,305 41,287 41,269 41,251 41,233 41,215 48398

MAVERICK COUNTY

Total Volume 429 429 429 429 429 429 76012


429 429 429 429 429 429 76013

7/25/2018 3:38 PM Page 76 of 95



MINING, HIDALGOTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MINING, HIDALGO Total Volume 254 254 254 254 254 254 77842


235 235 235 235 235 235 77843


19 19 19 19 19 19 77844


7/25/2018 3:38 PM Page 77 of 95



MINING, MAVERICKTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MINING, MAVERICK Total Volume 331 331 330 330 329 328 33600


66 66 66 66 66 66 33601


265 265 264 264 263 262 33602


7/25/2018 3:38 PM Page 78 of 95



MINING, STARRTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MINING, STARR Detail: Region: M County: STARRBasin: RIO GRANDE

13 13 13 13 13 13 52275

Total Volume 17 17 17 17 17 17 52273

Detail: Region: M County: STARRBasin: NUECES-RIO GRANDE

4 4 4 4 4 4 52274


7/25/2018 3:38 PM Page 79 of 95



MINING, WEBBTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MINING, WEBB Total Volume 5,904 5,897 5,891 5,884 5,878 5,871 33604


1,771 1,769 1,767 1,764 1,764 1,762 33605

Detail: Region: M County: WEBBBasin: NUECES-RIO GRANDE

295 295 295 295 293 293 33606


3,838 3,833 3,829 3,825 3,821 3,816 33607


7/25/2018 3:38 PM Page 80 of 95



MINING, ZAPATATransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct MINING, ZAPATA Total Volume 142 142 142 142 142 142 54971


142 142 142 142 142 142 54972


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RIO GRANDE CITYTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




RIO GRANDE CITY EL SAUZ WSC 163 163 163 163 163 163 74957

RIO GRANDE CITY EL TANQUE WSC 276 276 276 276 276 276 74972

RIO GRANDE CITY RIO WSC 1,032 1,032 1,032 1,032 1,032 1,032 63189

RIO WSC IRRIGATION, STARR 389 389 389 389 389 389 63208




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct RIO GRANDE CITY Total Volume 2,581 2,581 2,580 2,580 2,580 2,580 14246


2,581 2,581 2,580 2,580 2,580 2,580 14247

Purchased | RIO GRANDE CITY

EL SAUZ WSC Total Volume 163 163 163 163 163 163 74958


163 163 163 163 163 163 74959

EL TANQUE WSC Total Volume 276 276 276 276 276 276 74973


7/25/2018 3:38 PM Page 82 of 95


Purchased | RIO GRANDE CITY

EL TANQUE WSC Detail: Region: M County: STARRBasin: RIO GRANDE

276 276 276 276 276 276 74974

RIO WSC Total Volume 643 643 643 643 643 643 63190


643 643 643 643 643 643 63191

Purchased | RIO WSC

IRRIGATION, STARR

Total Volume 389 389 389 389 389 389 63209


389 389 389 389 389 389 63210

7/25/2018 3:38 PM Page 83 of 95



ROMATransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

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3,377 3,377 3,377 3,377 3,377 3,377 14253


7/25/2018 3:38 PM Page 84 of 95



SAN YGNACIO MUDTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

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2020 2030 2040 2050 2060 2070 TransactionId

Direct SAN YGNACIO MUD

Total Volume 284 284 284 284 284 284 14390


284 284 284 284 284 284 14391


7/25/2018 3:38 PM Page 85 of 95



SIESTA SHORES WCIDTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct SIESTA SHORES WCID

Total Volume 200 200 200 200 200 200 76148


200 200 200 200 200 200 76149


7/25/2018 3:38 PM Page 86 of 95



STEAM ELECTRIC POWER, WEBBTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct STEAM ELECTRIC POWER, WEBB

Total Volume 2,195 2,195 2,195 2,195 2,195 2,195 63537


2,195 2,195 2,195 2,195 2,195 2,195 63538


7/25/2018 3:38 PM Page 87 of 95



UNION WSCTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct UNION WSC Total Volume 454 454 454 454 454 454 62788


454 454 454 454 454 454 62789


7/25/2018 3:38 PM Page 88 of 95



UNITED IRRIGATION DISTRICTTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




UNITED IRRIGATION DISTRICT IRRIGATION, HIDALGO 17,237 17,230 17,222 17,214 17,207 17,199 7777

UNITED IRRIGATION DISTRICT MCALLEN 9,563 9,563 9,563 9,563 9,563 9,563 7185

UNITED IRRIGATION DISTRICT MISSION 11,440 11,440 11,440 11,440 11,440 11,440 59153

UNITED IRRIGATION DISTRICT SHARYLAND WSC 1,403 1,403 1,403 1,403 1,403 1,403 59136




Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Purchased | UNITED IRRIGATION DISTRICT

IRRIGATION, HIDALGO

Total Volume 17,237 17,230 17,222 17,214 17,207 17,199 7778


16,549 16,542 16,534 16,526 16,520 16,512 7779


7/25/2018 3:38 PM Page 89 of 95


Purchased | UNITED IRRIGATION DISTRICT

IRRIGATION, HIDALGO


688 688 688 688 687 687 7780



9,563 9,563 9,563 9,563 9,563 9,563 7187

MISSION Total Volume 11,440 11,440 11,440 11,440 11,440 11,440 59154


11,434 11,434 11,434 11,434 11,434 11,434 59155


6 6 6 6 6 6 59156



1,403 1,403 1,403 1,403 1,403 1,403 59138

7/25/2018 3:38 PM Page 90 of 95



VALLEY MUD 2Transaction Type 2020 2030 2040 2050 2060 2070 TransactionId




VALLEY MUD 2 IRRIGATION, CAMERON 1,818 1,814 1,811 1,807 1,804 1,800 12684




Split Entity WUG

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2020 2030 2040 2050 2060 2070 TransactionId

Direct VALLEY MUD 2 Total Volume 798 798 798 798 798 798 66477


737 737 737 737 737 737 66481


61 61 61 61 61 61 66485

Purchased | VALLEY MUD 2

IRRIGATION, CAMERON

Total Volume 1,818 1,814 1,811 1,807 1,804 1,800 12685


7/25/2018 3:38 PM Page 91 of 95


Purchased | VALLEY MUD 2

IRRIGATION, CAMERON


1,709 1,705 1,703 1,699 1,696 1,692 12686


109 109 108 108 108 108 12687

7/25/2018 3:38 PM Page 92 of 95



WEBB COUNTYTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId



* No reported Sales



Split Entity WUG

Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct WEBB COUNTY Total Volume 2,311 2,311 2,311 2,311 2,311 2,311 66505


265 265 265 266 265 265 66507


2,046 2,046 2,046 2,045 2,046 2,046 66509


7/25/2018 3:38 PM Page 93 of 95



ZAPATA COUNTYTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




ZAPATA COUNTY COUNTY-OTHER, ZAPATA 184 184 184 184 184 184 51888




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Description

2020 2030 2040 2050 2060 2070 TransactionId

Direct ZAPATA COUNTY Total Volume 1,900 1,900 1,900 1,900 1,900 1,900 7825


1,900 1,900 1,900 1,900 1,900 1,900 7826

Purchased | ZAPATA COUNTY

COUNTY-OTHER, ZAPATA

Total Volume 184 184 184 184 184 184 51889


184 184 184 184 184 184 51890


7/25/2018 3:38 PM Page 94 of 95



ZAPATA COUNTY WCID-HWY 16 EASTTransaction Type 2020 2030 2040 2050 2060 2070 TransactionId




RIO GRANDE VALLEY WATER MARKET ZAPATA COUNTY 180 180 180 180 180 180 76104

ZAPATA COUNTY WCID-HWY 16 EAST

RIO GRANDE VALLEY WATER MARKET 400 384 366 346 325 303 76101




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2020 2030 2040 2050 2060 2070 TransactionId

Direct ZAPATA COUNTY WCID-HWY 16 EAST

Total Volume 102 118 136 156 177 199 68375


102 118 136 156 177 199 68376


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180 180 180 180 180 180 76106


7/25/2018 3:38 PM Page 95 of 95


eat74167

Text Box

Appendix B: Region M DRAFT Hydrologic Variance Request

August 1, 2018

Jeff Walker,



1700 North Congress

Austin, TX 78711-3234

Re: Hydrologic Assumptions for the 2021 Rio Grande Regional Water Plan (Region M)

Mr. Walker,

The Rio Grande Planning Region intends to rely on current Water Availability Model (WAM) Run

3 estimates of Firm Yield and Modeled Available Groundwater to establish availabilities in the

2021 Rio Grande Regional Water Plan. The following assumptions have been approved by the

Rio Grande Regional Water Planning Group at the August 1, 2018 scheduled Board Meeting,

and are submitted here for your review.

Surface Water

1. The most current WAM Run 3 will be used for all Surface Water Rights Modeling for

existing supplies and future WMS;

a. Full exercise of existing surface water rights;

b. Zero effluent discharges unless specifically required by a surface water right

(hydropower, industrial rights, etc.);

c. Best available water rights information as of June, 2018; and

d. In the evaluation of the cumulative effects of water management strategies, the

Rio Grande WAM Run 3 may be used to estimate the impacts of future

urbanization (and the resulting reclassification of water rights) on the firm yield of

the system.

2. Reservoir capacities for Amistad and Falcon will be based on the current estimates for

sedimentation in 2020 and 2070, and a linear interpolation will be used to determine

capacity for the decades between.

a. Existing supplies will be based on the 2020 Firm Yield

b. Projected supplies and WMS will rely on estimated decadal averages of Firm Yield

3. Period of record for simulations:

a. Rio Grande WAM: 1940 – 2000

b. Nueces-Rio Grande WAM: 1948 – 1998

4. The Rio Grande WAM will be run to be consistent with the applicable variances submitted

by Region E and Region F:

a. Irrigation demand patterns above Fort Quitman will be modified so that diversions

only occur March through October, which is consistent with the operations of the

Rio Grande Project.

b. Flows from San Solomon and Griffin Springs have been corrected to enter

upstream of Balmorhea in the Pecos Basin rather than downstream of water right

diversion points.

c. Water rights for three users in Region E were removed because the right was not

recognized for these claimants in adjudication.

Groundwater

1. Availability for existing and future supplies for the Carrizo-Wilcox, Yegua Jackson, Gulf

Coast, and other minor aquifers will be in accordance with Modeled Available

Groundwater estimates, as calculated by TWDB on or before June 1, 2018. Region M may

pursue reallocation of MAG volumes, and will do so in coordination with TWDB.

2. The non-relevant DFC-compatible aquifer availabilities provided by TWDB (May 16, 2018)

will be included as groundwater available for current and future use.

Reuse/Recycle Water

1. Source water available for a reuse water management strategy will be determined based

on the estimated amount of water returned to a utility’s WWTPs for each decade, less

the amount of reuse water already being utilized as existing supply.

a. The amount of water returned to a utility’s WWTP will be estimated at 50% of the

utility’s projected water demands, adjusted for water conservation and drought

management strategies, unless site-specific information is available

Example: [50% * (projected water demands for a utility - conservation WMS

volumes - drought management WMS volumes)] – existing reuse supply

i. For Direct Reuse, this calculation will set an upper limit to the volume of

reuse water available, and will not require any WAM modeling, since Run

3 assumes no return flows.

ii. For Indirect reuse, treated effluent discharge volumes returned to the Rio

Grande would be limited by this calculation, and the effluent could be

entered as a return flow in the WAM to assess downstream availability.

There are no current or proposed future indirect reuse project in Region

M.

2. Existing and future non-potable reuse supplies will be shown to meet no more than 10%

of municipal demands. Manufacturing and steam-electric use of non-potable water will

be considered on a case-by-case basis.

Hydrologic Models

• Rio Grande WAM (downloaded from TCEQ 6/29/18)

• Nueces – Rio Grande WAM (downloaded from TCEQ 6/21/18)

• Southern Carrizo-Wilcox-Queen City-Sparta GAM

• Gulf Coast Aquifer System (southern portion) GAM

• Yegua-Jackson Aquifer GAM

• Any additional currently-approved WAM or GAM necessary

Please contact me if you have any questions.

Sincerely,

Sara Eatman

Technical Consultant, Rio Grande Regional Water Planning Group

Cc: Tomas Rodriguez, Chairman, Rio Grande Regional Water Planning Group

William Alfaro, TWDB Project Manager

eat74167

Text Box

Appendix C: Region E Hydrologic Variance Request

ITEM 7. B.

FINANCIAL REPORT

Documents

AGENDA · 8/1/2018 · Agriculture in the Rio Grande Basin”, a four (4) year USDA-NIFA (National Institute of Food and Agriculture) project of which he is a co-principal investigator