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Trinity River Authority

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A Texas river authority responsible for water supply and water conservation across the Trinity River Basin.

Last updated August 25, 2026

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Overview

The Trinity River Authority (TRA) is a public water-resource authority created by the Texas Legislature in 1955 to address water supply and conservation needs in the Trinity River Basin. Its jurisdiction covers approximately 17,965 square miles, or about 46,529 square kilometres, extending across all or part of 17 Texas counties. The authority’s general offices are in Arlington. TRA operates as a self-funded public entity. Its operations are supported by revenues generated through its activities rather than by state appropriations or general taxation. Its core remit is connected to the development, management, and conservation of water resources within the Trinity River Basin. The authority’s jurisdiction includes a substantial network of water infrastructure; of the 31 major reservoirs constructed in the Trinity River drainage basin since 1911, 29 fall under TRA jurisdiction. The organization is governed by a 25-member board of directors. Members are appointed by the Governor of Texas for six-year terms, with approximately one-third of the board subject to appointment or replacement every two years. The statutory composition distributes representation among counties in the authority’s territory: four members are appointed from Dallas County, three from Tarrant County, one from each of 15 specified counties, and three additional members are appointed at large from counties within TRA’s jurisdiction. The board appoints the General Manager, who is responsible for overseeing day-to-day operations. TRA is therefore not a conventional consumer brand or commercial company. Its public identity is associated with regional water-resource governance, infrastructure, conservation, and service delivery in the Trinity River Basin. Its activities support communities and other users that depend on reliable water resources and basin-scale management. The available reference material does not identify a commercial parent company, publicly traded securities, consumer product portfolio, or international operations.

History

The Trinity River Authority was established by the Texas Legislature in 1955. Its creation reflected the need for coordinated management of water resources in the Trinity River Basin, a large drainage area extending across a significant portion of North and East Texas. Rather than operating as a private water company or a state-funded department, TRA was constituted as a regional authority with responsibility for water supply and water conservation. The authority’s territory covers approximately 17,965 square miles and includes all or part of 17 counties. This broad geographic remit requires basin-scale planning rather than management limited to a single municipality. TRA’s responsibilities are connected to the development and stewardship of water resources, including infrastructure associated with dams and reservoirs. The Trinity River drainage basin has seen the construction of 31 major reservoirs since 1911, and 29 of those reservoirs fall under TRA jurisdiction according to the referenced account. TRA is designed to finance its operations from revenues generated through its own activities. The authority receives no state appropriations and does not rely on taxes for its operating funding. This self-funded structure distinguishes it from ordinary state agencies while preserving its public-purpose role in regional water management. Governance is vested in a 25-member board of directors appointed by the Governor of Texas. Directors serve six-year terms, and approximately one-third of the board is appointed or replaced every two years. The statutory appointment structure gives specified representation to Dallas County, Tarrant County, and 15 additional counties, while three members are appointed at large from counties within the authority’s jurisdiction. The board selects the General Manager, who directs the authority’s operations. The authority’s general offices are located in Arlington, Texas. The available reference material does not provide a detailed chronology of individual infrastructure projects, leadership appointments, campaigns, controversies, or organizational name changes. Accordingly, the documented history is centered on TRA’s legislative formation, regional jurisdiction, self-funded operating model, water-resource mandate, and governance structure.

  • 1955

    Authority established

    [1]

    The Texas Legislature formed the Trinity River Authority to address water supply and water conservation in the Trinity River Basin.

Products and positioning

A self-funded Texas public authority focused on regional water supply, conservation, and infrastructure management in the Trinity River Basin.

  • Public water management · 1955

    Regional water-resource management

    TRA’s central function is basin-level management of water resources across its Texas jurisdiction. This includes planning and administering activities connected with water supply and conservation in the Trinity River Basin rather than selling a conventional consumer product.

  • Water utility service · 1955

    Water supply services

    The authority’s statutory and operational focus includes supporting water supply within the Trinity River Basin. The supplied reference does not specify individual service contracts, customer categories, treatment facilities, or service volumes.

  • Environmental and resource conservation · 1955

    Water conservation

    Water conservation is one of TRA’s principal areas of responsibility. It forms part of the authority’s basin-wide public-resource mission.

  • Water infrastructure

    Dam and reservoir infrastructure oversight

    TRA has jurisdiction over 29 of the 31 major reservoirs constructed in the Trinity River drainage basin since 1911, linking the authority to regional dam and reservoir infrastructure management.

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