FERC takes comment on enviro review of Washington hydro project

On Dec. 11, the Federal Energy Regulatory Commission put out for 30 days of public comment a draft environmental assessment on a 6-MW hydro project in Washington State.

In August 2013, the Public Utility District No. 1 of Snohomish County, Washington filed an application for a license to construct and operate its proposed 6-MW Hancock Creek Hydroelectric Project. The project would be located on Hancock Creek near the city of North Bend in King County, Washington.

The project’s new facilities would include: an approximately 107-foot-long diversion structure traversing Hancock Creek; a 0.65-acre-foot impoundment; a 25-foot-wide, 16.5-foot-high, 59-foot-long intake; an approximately 60-foot-long, concrete pool-and-weir fishway; a 1.5-mile long, 39- to 44-inch-diameter buried penstock; a powerhouse containing a single 6-MW two-jet horizontal-shaft Pelton turbine/generator; a 13-foot-wide, 150-foot-long rip-rap-lined tailrace channel with a 2-foot vertical drop and concrete apron; and a 0.3-mile-long, 34.5-kV buried transmission line connecting to the existing Black Creek Hydroelectric Project switching vault. The project would generate an average of 22,100 MWh annually.

The Hancock Creek Project would operate in run-of-river mode when inflows equal or exceed the minimum hydraulic capacity plus any minimum instream flow release. The project is not expected to operate for about two and a half to three months during the summer when natural flows in the creek are below the minimum plant capacity.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.