PILLAR: Sustainable
AGENDA DATE: September 23, 2026
COUNCIL DISTRICT(S): Citywide
DEPARTMENT: Dallas Water Utilities Department
PRIORITY: Infrastructure
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SUBJECT
Title
Authorize an Interlocal Agreement between the City of Dallas, North Texas Municipal Water District, Tarrant Regional Water District, Upper Trinity Regional Water District, and the City of Irving for Regional Water Supply Planning Studies - Not to exceed $83,125.00 - Financing: Water Construction Fund
*In alignment with Long Range Water Supply Plan.
Body
BACKGROUND
On June 26, 2025, the Texas Water Development Board found that an interregional conflict existed between the 2026 Region C and Region D Initially Prepared Regional Water Plans and invited the regional water planning groups to engage in mediation to resolve the conflict. At the end of July 2025, representatives from both Region C and Region D met in mediation and discussed the issues relating to the proposed Marvin Nichols Reservoir in their regional water plans. The mediation resulted in the “Agreement Resolving the Declared Conflict Between the Region C and Region D 2026 Initially Prepared Water Plans” (the “Mediated Agreement”), which was finalized on August 1, 2025.
The Mediated Agreement included two studies to be completed, an independent study to address the potential benefits and impacts of the proposed Marvin Nichols Reservoir on the economic, agricultural, and natural resources of Regions C and D (the “Joint Study”) and an “Apples-to-Apples” monetary and non-monetary comparison of the Marvin Nichols and Toledo Bend projects using firm(s) that can provide a fresh assessment (the “Region C Only Study”). The agreement also provides that Regions C and D would work to advance the Joint Study and equally share in the costs, not to exceed $250,000.00 each. Up to five members from each of Region C and D were identified to participate in an interregional working g...
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