Sweetheart Lake : P-13563

« Go Back
Loading...

Summary

  • P-13563
  • Lower Sweetheart Lake/Sweetheart Creek
  • Alaska
  • AK
  • 19.80 MW
  • Proposed
  • Conventional

Permit

  • Download Permit
  • 04-11-2013
  • 03-31-2016
  • Juneau Hydropower Inc.
  • ALP

Description

 

The proposed project would consist of: 

(1) the existing Lower Sweetheart Lake, raised to a surface elevation of 628 feet above mean sea level, with a surface area of 1,701.5 acres and an active storage capacity of 94,069 acre-feet at the normal maximum water elevation;

(2) a new 275-foot-long, 105-foot-high concrete and rock face dam, including project intake facilities and a 125-foot-wide overflow spillway, constructed at the natural outlet of  Lower Sweetheart Lake;

(3) a new 500-foot-long, 10-foot-diameter stream diversion tunnel that would be converted to reservoir outlet works after project construction;

(4) a new 9,595-foot-long, 12-foot-diameter penstock diverting flow from the project intake to the powerhouse;

(5) a new powerhouse containing three new 6.6-megawatt (MW), Francis generating units having a total installed capacity of 19.8 MW;

(6) a tailrace consisting of:

(a) a new 76-foot-wide to 22-foot-wide, 75-foot-long open afterbay;

(b) a new 225-foot-long, 12-foot-diameter tunnel extending from the afterbay to an outlet structure on a tributary to Sweetheart Creek; and

(c) an existing tributary stream channel, modified to a 100-foot-long, 35-foot-wide channel that will flow into Sweetheart Creek;

(7) new marine access facilities including a dual-height marine ramp, floating docks for seaplane and boat access, and a staging area adjacent to the docks;

(8) a new switchyard adjacent to the powerhouse;

(9) a new 8.69-mile-long, 138-kilovolt transmission line consisting of buried, submarine, and overhead segments;

(10) a new 4,400-foot-long access road; and

(11) appurtenant facilities. 

The proposed Sweetheart Lake Project would have an average annual generation of 111 gigawatt-hours.

This is the second preliminary permit for the project for which the first preliminary permit expired on November 30, 2011. 

Issues

Proximity to recreation areas used by Juneau (Tongass)

About Alaska Map

This interactive website is supported through a partnership between the Hydropower Reform Coalition and the National Park Service.  Its purpose is to allow stakeholders to share information about important resources, including recreation, in the vicinity of proposed hydropower projects in Alaska.  HRC and NPS will use this input to set priorities for our involvement.

We encourage you to share any resource related information you may have about the proposed project area through our contact us page.   Please be aware that this website is not a substitute for FERC’s e-Comment system.  If you wish to have your comments considered by FERC and the project applicant, please see these instructions on how to e-Comment.