The Federal Energy Regulatory Commission issued a Feb. 23 notice about a November 2015 application from Clark Canyon Hydro LLC for an original license for the Clark Canyon Dam Hydroelectric Project, to be located in the Town of Dillon, Beaverhead County, Montana.
The deadline for filing motions to intervene and protests, comments, terms and conditions, recommendations, and prescriptions is 30 days from the issuance date of this Feb. 23 notice. Reply comments are due 45 days from the issuance date of this notice. This application has been accepted for filing and is now ready for environmental analysis.
The Clark Canyon Dam Hydroelectric Project would utilize the U.S. Bureau of Reclamation’s Clark Canyon Dam and outlet works including an intake structure and concrete conduit in the reservoir. It would consist of these new facilities:
- a 360-foot-long, 8-foot-diameter steel penstock within the existing concrete conduit, ending in a trifurcation;
- two 35-foot-long, 8-foot-diameter penstocks extending from the trifurcation to the powerhouse, transitioning to 6-foot-diameter before entering the powerhouse;
- a 10-foot-long, 8-foot-diameter steel penstock leaving the trifurcation and ending in a 7-foot-diameter cone valve and reducer to control discharge into the existing outlet stilling basin;
- a 65-foot-long, 46-foot-wide reinforced concrete powerhouse containing two vertical Francis-type turbine/generator units with a total capacity of 4.7 MW;
- two 25-foot-long steel draft tubes transitioning to concrete draft tube/tailrace section;
- a 17-foot-long, 15-foot-diameter tailrace channel connecting with the existing spillway stilling basin;
- a 45-foot-long, 10-foot-wide aeration basin downstream of the powerhouse with three frames containing 330 diffusers;
- a 1,100-foot-long, 4.16-kV buried transmission line from the powerhouse to a substation;
- a substation containing step-up transformers and switchgear; and
- a 7.9-mile-long, 69-kV transmission line extending from the project substation to the Peterson Flat substation (the point of interconnection).
The estimated annual generation of the Clark Canyon Dam Project would be 15.4 gigawatthours. All project facilities would be located on federal lands owned by the U.S. Bureau of Reclamation and the U.S. Bureau of Land Management. The applicant proposes to operate the project as run-of-release.
The applicant contact is: John Gangemi, (406) 249-3972, firstname.lastname@example.org.