On Tuesday, the Casper City Council gave the green light to a water‑exchange petition that promises to make the city’s winter water operations safer and more efficient. Public Services Director Krista Johnston explained that the agreement will let Casper trade natural flow from the North Platte River for water already held under city‑owned permits at the Upper Rock Creek Reservoir.
How the exchange works
Winter releases from Upper Rock Creek often create ice dams in downstream channels, raising the danger of flood damage. By swapping river water for reservoir water, Casper can avoid those ice buildups. If the state engineer signs off on the petition, the city may divert water from the North Platte River whenever conditions call for it. In return, the city will coordinate with the State Engineer’s Office to release an equivalent volume of replacement water from Upper Rock Creek when the reservoir can safely do so. The total amount of replacement water is capped at 2,799.8 acre‑feet per water year.
Operational benefits for the community
Johnston highlighted two key advantages beyond flood mitigation. First, the exchange gives Casper immediate access to diverted water, eliminating the five‑day travel lag that previously occurred when water moved from Upper Rock Creek to the city’s system. Second, the arrangement allows Casper to earn depletion credits for a portion of the treated effluent from its wastewater treatment plant, providing a modest financial return for the city’s water‑treatment efforts.
Local impact and next steps
Residents of Casper stand to benefit from reduced flood risk during the harsh winter months, a season that historically has seen ice‑dam formation threaten homes and businesses along downstream drainages. Faster water delivery also supports municipal services that rely on a steady supply, from fire protection to everyday household use.
The petition now awaits approval from the state engineer. If approved, the city will begin implementing the exchange in the upcoming water year, with ongoing coordination to ensure that replacement releases from Upper Rock Creek are timed to protect both the reservoir’s storage capacity and downstream floodplain safety.
What this means for Wyoming water policy
Casper’s proactive approach reflects a broader trend among Wyoming municipalities to seek flexible water‑management tools that balance local needs with state‑wide water rights. By working directly with the State Engineer’s Office, the city demonstrates a commitment to responsible stewardship of the state’s precious water resources while safeguarding its citizens.
City officials plan to keep the public informed as the exchange moves forward, holding informational sessions and providing updates through the city’s website and local media outlets.
Original reporting: Oil City News (Casper WY) — read the source article.
