New Cascade Canal

The New Cascade Canal Diversion (approximately 150 cfs) is located on the left bank of the Yakima River about 7 miles northwest of the city of Ellensburg, Washington. The current New Cascade fishscreen facility is an improvement over the old facility, which had an inadequate bypass and severely rusted screens.

The facility consists of eight rotary drum screens, each 6 feet in diameter by 10 feet long. The screens are constructed of 4.5-12 stainless steel woven wire mesh (1/8-inch openings).

The bypass entrance channel is a full-depth, 18-inch wide rectangular channel that is 15 feet long. An adjustable weir gate at the end of this channel controls flows that then drop into a 3-foot wide by 9-foot long downwell. Bypass flows are then conveyed through an 18-inch diameter PVC pipe for 101 feet to the river.