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Reclamation issues snowmelt forecast for North Platte River Basin

Media Contact: Bryson Jones 406-247-7674 bkjones@usbr.gov
For Release: Apr 10, 2023

MILLS, Wyo.–The Bureau of Reclamation has prepared the April snowmelt runoff forecasts and operating plans for the North Platte River Basin.

The April forecasts indicate the spring snowmelt runoff will be above average. Total April through July runoff in the North Platte River Basin above Glendo Dam is expected to be 1,150,000 acre-feet (af), which is 125% of the 30-year average.

The total conservation storage capacity of the North Platte Reservoir System is approximately 2,815,800 af. As of March 31, 2023, the combined storage content in the North Platte Reservoirs was 1,310,200 af, which is 76% of the 30-year average. 

Current releases are 530 cubic feet per second (cfs) from Seminoe Reservoir through the Miracle Mile. Releases out of Gray Reef Reservoir are 450 cfs. Releases from Glendo and Guernsey Reservoir are expected to begin by mid-April. Based on current projections for the months of May, June, and July, the releases out of Seminoe Reservoir are expected to peak at around 2,600 cfs, while flows out of Gray Reef are expected to be in the range of 1,200 to 3,000 cfs. Releases from Guernsey will be in the 2,000 to 5,000 cfs range. Pathfinder Reservoir is not expected to spill this spring. Based on our current forecast, an allocation is not expected for our North Platte Project contractors.

Reclamation’s Wyoming Area Office operates seven reservoirs on the North Platte River with Seminoe Reservoir farthest upstream and Guernsey Reservoir farthest downstream. This system provides irrigation supply to hundreds of thousands of acres of farmland and produces power generation from six powerplants which supply power to tens of thousands of homes.

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