northern trinity groundwater conservation management goals for each district to manage and conserve

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  • Northern Trinity Groundwater Conservation

    District

    Groundwater Management Plan

    Adopted on May 13, 2010

    Texas Water Development Board approval on _________

    May 13, 2010

  • Table of Contents

    MANAGEMENT PLAN i

    I. District’s Mission ............................................................................................. 1

    II. Purpose Of The Management Plan................................................................. 1

    III. District Information .......................................................................................... 2

    IV. Statement of Guiding Principles ...................................................................... 4

    V. Criteria for Plan Approval ................................................................................ 4

    VI. Estimates of Technical Information as Required by § 36.1071 of the Tex. Water Code and 31 Tex. Admin. Code § 356.5.............................................. 5

    VII. Management of Groundwater Supplies—31 TAC § 356.5(a)(6)-(7) and TWC §36.1071(e)(4) .............................................................................................. 15

    VIII. Methodology to Track District Progress in Achieving Management Goals—31 TAC § 356.5(a)(6) ......................................................................................... 24

    IX. Actions, Procedures, Performance, and Avoidance for District Implementation of Management Plan – 31 TAC § 356.5(a)(3); 31 TAC § 356.5 (a)(4) / 36.1071(e)(2) ................................................................................................ 24

    X. Management Goals....................................................................................... 24

    XI. Management Goals Determined Not to be Applicable to the District............. 27

  • Table of Contents

    MANAGEMENT PLAN ii

    List of Tables

    Table Page

    Table 1. Desired Future Conditions Submitted To TWDB........................................ 6

    Table 2. Managed Available Groundwater Estimates From TWDB Gam Run 08-84mag and Run 08-14mag ................................................................... 6

    Table 3. Historical Groundwater Pumpage Summary (In Acre-Feet) ....................... 7

    Table 4. Estimated Annual Amount Of Recharge From Precipitation ...................... 8

    Table 5. Water Supply Needs From 2007 State Water Plan.................................... 9

    Table 6. Projected Surface Water Supplies ........................................................... 11

    Table 7. Projected Water Demands ....................................................................... 13

    Table 8. Demands Estimated Annual Volume of Water That Discharges from The Aquifer .............................................................................................. 14

    Table 9. Annual Volume Of Flow Into The District, Out Of The District Within Each Aquifer, And Between Each Aquifer In The District......................... 15

    Table 10. Water Management Strategies From 2007 State Water Plan .................. 17

  • Table of Contents

    MANAGEMENT PLAN iii

    List of Appendices

    Appendix Page

    Appendix A - Map of District Location & Boundaries ................................................ 29

    Appendix B - Map of Trinity Aquifer .......................................................................... 30

    Appendix C - Map of Woodbine Aquifer ................................................................... 31

    Appendix D - Aquifer Within Tarrant County............................................................. 32

    Appendix E - District Resolution Adopting the Plan .................................................. 33

    Appendix F - Notice of Meeting to Adopt The Plan................................................... 34

    Appendix G - Letter to Surface Water Management Entities .................................... 35

    Appendix H - Adopted Rules of District .................................................................... 36

  • MANAGEMENT PLAN 1

    NORTHERN TRINITY GROUNDWATER CONSERVATION DISTRICT GROUNDWATER MANAGEMENT PLAN

    I. District’s Mission

    The mission of the Northern Trinity Groundwater Conservation District (“District”) is to manage, preserve, and protect the groundwater resources of Tarrant County, Texas. The District will work to minimize the draw-down of the water table, prevent the waste of groundwater, prevent interference between wells, protect the existing and historic use of groundwater, prevent the degradation of the quality of groundwater, use public education to promote water conservation, give consideration to the needs of municipal water utilities and the agricultural community, and carry out the powers and duties conferred under Chapter 36 of the Texas Water Code (“TWC”). This management plan outlines the goals and objectives of the District and how they will be implemented.

    II. Purpose Of The Management Plan

    The 75th Texas Legislature in 1997 enacted Senate Bill 1 (“SB 1”) to establish a comprehensive statewide water planning process. In particular, SB 1 contained provisions that required groundwater conservation districts to prepare management plans to identify the water supply resources and water demands that will shape the decisions of each district. SB 1 designed the management plans to include management goals for each district to manage and conserve the groundwater resources within their boundaries. In 2001, the Texas Legislature enacted Senate Bill 2 (“SB 2”) to build on the planning requirements of SB 1 and to further clarify the actions necessary for districts to manage and conserve the groundwater resources of the state of Texas. The Texas Legislature enacted significant changes to the management of groundwater resources in Texas with the passage of House Bill 1763 (“HB 1763”) in 2005. HB 1763 created a long-term planning process in which groundwater conservation districts (“GCD”) in each Groundwater Management Area (“GMA”) are required to meet and determine the Desired Future Conditions (“DFC”) for the groundwater resources within their boundaries by September 1, 2010. In addition, HB 1763 required GCDs, like the District, to provide each GCDs' management plans with the other GCDs in the GMA for review by the other GCDs. This Management Plan satisfies the requirements of SB 1, SB 2, HB 1763, the statutory requirements of Chapter 36 of the TWC, and the administrative requirements of the Texas Water Development Board’s (TWDB) rules.

  • MANAGEMENT PLAN 2

    ounty.

    III. District Information

    A. Creation The District was created in 2007 by the 80th Texas Legislature1 in order to conserve, preserve, protect, and prevent waste of the groundwater resources of Tarrant County, Texas, and to promote recharge of the aquifers within Tarrant C B. Authority The District has the rights and responsibilities provided for in TWC Chapter 36 and 31 Texas Administrative Code (TAC) Chapter 356. The District is charged with conducting hydrogeological studies, adopting a management plan, providing for the permitting of certain water wells and implementing programs to achieve statutory mandates. The District has rule-making authority to implement the policies and procedures needed to manage the groundwater resources of Tarrant County C. Location and Extent The District’s boundaries are coextensive with the boundaries of Tarrant County, and all lands and other property within these boundaries will benefit from the works and projects that will be accomplished by the District. The District covers an area of approximately 863.42 square miles.2 A map of the District is included in Appendix A D. Groundwater Resources of Tarrant County Tarrant County is located primarily over the Trinity aquifer. The TWDB has identified the Trinity aquifer as the only major aquifer within the District’s boundaries. TWDB defines major aquifers as aquifers that are capable of producing large yields to wells or that produce groundwater over a large area. A TWDB diagram of the Trinity Aquifer can be found at Appendix B. The only minor aquifer recognized within the District is the Woodbine aquifer. TWDB indicates that minor aquifers tend to be smaller in size and produce less water than major aquifers. A TWDB diagram of the Woodbine Aquifer can be found at Appendix C. TWDB describes the groundwater resources of the Trinity Aquifer as follows: The Trinity aquifer consists of early Cretaceous age formations of the Trinity Group where they occur in a band extending through the central part of the state in all or parts of 55 counties, from the Red River in North Texas to the Hill Country of South- Central Texas. Trinity Group deposits also occur in the Panhandle and Edwards Plateau regions where they are included as part of the Edwards-Trinity (High Plains and Plateau) aquifers.

    1 Act of May 28, 2007, 80th Leg., R.S., ch. 1126, 2007 Tex. Gen. Laws 3794, codified at TEX. SPEC. DIST. LOC. LAWS CODE ANN. ch. 8820. 2 Texas Almanac 2008-2009, The Dallas Morning News, Inc.

  • MANAGEMENT PLAN 3

    Formations comprising the Trinity Group are (from youngest to oldest) the Paluxy, Glen Rose, and Twin Mountains-Travis Peak. Updip, where the Glen Rose t

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