OMAHA, Neb.— Jamestown Reservoir flood storage is nearly evacuated with the pool elevation approaching the summer target of 1,431 feet. Releases are being adjusted out of Jamestown and Pipestem Reservoirs accordingly.
Jamestown Reservoir releases were decreased from 650 cubic feet per second (cfs) to 450 cfs on Thursday, June 1, and will be further decreased to approximately 250 cfs next week. The Pipestem Reservoir release was increased from 0 cfs to approximately 200 cfs on Thursday, June 1, and will be further increased to 225 cfs next week. The combined release will remain at 650 cfs through the weekend and then be reduced to 475 cfs. As a result of this lower combined release, the James River at Jamestown gage should drop approximately 0.8 feet.
Pipestem Reservoir is currently at pool elevation 1463.5 feet which results in 22.7 percent of the flood pool occupied. Inflows are currently negligible. Jamestown Reservoir is currently at pool elevation 1,432.1 feet which results in 1.4 percent of the flood pool occupied. Inflows are currently 160 cfs.
Throughout the summer, Jamestown Reservoir releases will be adjusted to match the inflow in order to maintain the summer target pool elevation. Pipestem Reservoir flood storage will be evacuated in June, July and August with a release around 225 cfs. The combined release will vary over the summer as Jamestown Reservoir releases are adjusted. All releases may change depending on rain.
Release no. 17-055