Upper Trinity case study: Lake Ralph Hall and decades-long regional project planning
Nov 6, 2026
Upper Trinity Regional Water District leaders described long-term planning and financing to secure new storage and conveyance, including Lake Ralph Hall (planned to hold roughly 59 billion gallons) as an example of multi-jurisdictional collaboration to deliver supply to growing North Texas markets.
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Larry Patterson, executive director with the Upper Trinity Regional Water District, told Parker County leaders the district's multi-decade approach shows how pooled financing and contracts can deliver major new supply. Patterson described the district's mix of contracts, grants and treatment plants, and said Lake Ralph Hall — a reservoir being built on the North Sulphur River — will provide a regional raw-water source once complete.
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