Regional Water Plan: Region C, 2016, Volume 1. Main Report Page: 5B.11
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between Texas and Oklahoma. Lake Texoma is used for water supply, hydropower generation, flood
control, and recreation. In Texas, the North Texas Municipal Water District, the Greater Texoma Utility
Authority, the City of Denison, TXU, and the Red River Authority have contracts with the Corps of
Engineers and Texas water rights allowing them to use water from Lake Texoma ().
The U.S. Congress has passed a law allowing the Corps to reallocate an additional 300,000 acre-feet of
storage in Lake Texoma from hydropower use to water supply, 150,000 acre-feet for Texas and 150,000
acre-feet for Oklahoma. The North Texas Municipal Water District has purchased 100,000 of the 150,000
acre-feet of storage for Texas and has a Texas water right to divert an additional 113,000 acre-feet per
year from Lake Texoma. The remaining 50,000 acre-feet of storage has been purchased by Greater
Texoma Utility Authority, which has a Texas water right to divert an additional 56,500 acre-feet per year
based on this storage.
Further reallocation of hydropower storage to water supply in Lake Texoma would provide additional
yield. According to the Corps of Engineers, the firm yield of Lake Texoma with all hydropower storage
reallocated to water supply would be 1,088,500 acre-feet per year (8). Texas' share would be 544,250
acre-feet per year, leaving about 220,000 acre-feet per year of additional supply available to Texas by the
reallocation of more hydropower storage to municipal use (beyond the supplies already contracted for
and the currently authorized reallocation). Further reallocation would require a new authorization by
Congress.
Lake Texoma is only about 50 miles from the Metroplex. The lake has elevated levels of dissolved solids,
and the water must be blended with higher quality water or desalinated for municipal use. The elevated
dissolved solids in Lake Texoma would have some environmental impacts whether the water is used by
blending or desalination. Use for most Region C needs will require an interbasin transfer permit. Blending
water from Lake Texoma with water from other sources provides an inexpensive supply for Region C.
Blending Lake Texoma supplies with potential supplies from Lower Bois d'Arc Creek Reservoir and the
Sulphur Basin Supplies strategy is a recommended strategy for North Texas Municipal Water District. The
recommended strategy provides approximately 98,000 acre-feet per year for North Texas Municipal
Water District.
Desalination provides treated water but is a more expensive strategy, and there are uncertainties in the
long-term costs. The estimated costs for desalination of water from Lake Texoma are based on current
cost information for large desalination facilities. However, they are more uncertain than other cost2016 Region C Water Plan
5B.11
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Freese and Nichols, Inc. Regional Water Plan: Region C, 2016, Volume 1. Main Report, report, December 2015; Fort Worth, Texas. (https://texashistory.unt.edu/ark:/67531/metapth838641/m1/218/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.