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SEAPA Hydro Power
 
 

Swan Lake Reservoir Expansion Project

 
 

Dam 174' high x 430' wide
Spillway 15' high x 100' wide

The original cost estimate of $13.3 million for the Swan Lake Reservoir Expansion Project was partially funded when the Agency received a direct legislative appropriation of $3.9 million from the State of Alaska. Following that appropriation the Agency was able to sell bonds for additional financing. The combination of low bond rates, debt restructuring, and a partial State grant will all contribute to the completion of the project without a rate increase to the Agency's Member Communities. The project is substantially complete.

Highlights of the Expansion:

 
 

Swan Lake Reports

 
 

Swan Lake Design / Construction Documents

The following material is available to illustrate the current design and schedule:

Documents Posted Downloads Description
McMillen Engineering Report June 2012 Lake Raise Feasibility Study Final Report pages 165
Preliminary Drawings June 2012 Volume 1 - Conceptual Design Drawings
Construction Schedule June 2012 Swan Lake Dam and Power Plant - Lake Raise Alternatives
 

Swan Lake White Paper and Documents

The following material is available to illustrate the current design and schedule:

Documents Posted Downloads Description
Swan Lake Reservoir Expansion White Paper June 2012 Lake Raise Feasibility Study Final Report pages 165
Costs & Benefits Analysis for Increasing Storage at Swan Lake June 2012 Volume 1 - Conceptual Design Drawings
Appendix A1 to Costs & Benefits Analysis - Swan Model June 2012 Swan Lake Dam and Power Plant - Lake Raise Alternatives
Appendix A2 to Costs & Benefits Analysis - Tyee Model June 2012 Appendix A2- Tyee Hydraulic Model
Appendix B1 to Costs & Benefits Analysis June 2012 CAI Avg Inflow
Appendix B1 to Costs & Benefits Analysis June 2012 USGS Gage 15070000
Appendix B2 to Costs & Benefits Analysis June 2012 1982 0924 IECo Design Criteria
Appendix B3 to Costs & Benefits Analysis June 2012 Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case A - Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case B - Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case C - Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case D - Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case E - Swan Lake Storage Increase Load-Resources
Appendix B3 to Costs & Benefits Analysis June 2012 Case F - Swan Lake Storage Increase Load-Resources
Appendix C1 to Costs & Benefits Analysis June 2012 USS011630-002
Appendix C2 to Costs & Benefits Analysis June 2012 Boundary Map

Background Documents (Licensing and FERC correspondence)

The following material has been pulled from the FERC e-library and the SEAPA archives. The material will help provide a common understanding of the history and environmental setting for the Swan Lake Hydroelectric Project. As more material is identified, it will be added to this section.

  • Photo of Swan Lake showing general layout of powerhouse, Carrol Inlet, and the reservoir from circa 1980.
  • License application (1979) from Ketchikan Public Utilities
  • Environmental documents including monitoring studies and revised exhibits (.zip file)
  • FERC License, orders, and amendments (.zip)
  • Correspondence between agencies, FERC, and the Four Dam Pool Power Authority (successor to KPU and predecessor to SEAPA)

Meetings and Consultation

The following material is available to illustrate the current design and schedule:

Documents Posted Downloads Description
Pre-formal Meeting May 24, 2012 Meeting between SEAPA and federal/state agencies to introduce proposed action. The following documents are available:
Pre-formal Meeting February 27, 2013 Meeting between SEAPA and federal/state agencies to review 2012 study results and discuss outstanding analysis needs.
Joint Meeting / Public Meeting May 22 (3:00-4:30)
/ (5:00-7:00pm)
Both meetings are being held in the Best Western Sunny Point Conference Ball Room, 3434 Tongass Avenue, Ketchikan.
Comments on ICD
and study requests.
   
 

Note that all meeting materials and notes will be uploaded to this server and filed with FERC following the meeting.

2012 Study Program

Study plans and other material related to the proposed 2012 study are here. These plans are shown below in draft form:

Comments were recieved from the US Forest Service and the US Fish and Wildlife Service. The Alaska Department of Fish and Game issued a permit for fish collection on 7/76/2012. Note that some permit conditions required modification of study methods as described in draft study reports (below).

Study Reports for the 2012 are listed below. These were made available for review on January 18, 2013 (download all files as a .zip file here).

Comments on the draft study reports are summarized in Attachment 1 to each study report, along with how the comments were treated.

Initial Consultation Documents

On April 15 2013 SEAPA filed the Initial Consultation Document (ICD) with the Federal Energy Regulatory Commission (FERC). This ICD consolidates into a single document the information needed by these entities to understand the Project, identify any environmental issues, identify any information needs or studies, and provide comments and recommendations. This document initiates the first stage (Stage 1) of the consultation process as set forth in 18 CFR §4.38(b). Stage 1 will end when agencies have provided SEAPA with a list of study requests. Stage 1 will be followed by Stage 2, which addresses the questions identified in Stage 1, and by Stage 3, in which FERC conducts post-filing consultation with agencies pursuant to the National Environmental Policy Act (NEPA).

The ICD also contains final copies of the Swan Lake Study Reports, which may also be accessed individually from the pull down menu above.

Resource Reports

Following First Stage Consultation, SEAPA is preparing documents which will be used for the amendment application and which will help faciliate environmental review by the resource agencies.    Agency comments on the draft resource reports are found here.  The following FINAL Resource Reports can be downloaded below.   Note that each report has a "Response to Comments" table at the end that addresses comments recieved.

 

Draft Non-Capacity License Amendment

Following several drafts of resource reports and extended consultation with agencies regarding the Swan Lake Expansion Project, SEAPA is issuing the DRAFT non-capacity amendment for a 60 day review.  Included in the release is the following (note: all documents can be downloaded via this .zip file):

  • Draft Operational Exhibits:
    • E - Statement of the Nature, Extent and Ownership of the Water Rights for the Project
    • H - Statement of the Proposed Operation of the Project During Periods of Low, Normal, and Flood Streamflow
    • I-Statement of the Estimated Dependable Capacity and the Average Annual Energy Produced by the Project
    • J-General Project Map
    • K-Detailed Project Maps
    • L-General Design Drawings [note:  drawings are being withheld as they are CEII - a list of included drawings is provided]
    • M-General Description of Mechanical, Electrical and Transmission Equipment
    • N-Estimated Cost of Project Development
    • O-Statement of the Estimated Time Required to Complete Project Works

SEAPA is requesting comments on this material no later than June 9, 2014.

Final Non-Capacity License Amendment

Following several drafts of resource reports and consultation with agencies regarding the Applicant Prepared Environmental Assessment (APEA) for the Swan Lake Expansion Project, SEAPA filed the final non-capacity amendment with FERC on July 21, 2014. A complete package is available at the FERC website, Included in the release is the following (note: all documents can be downloaded via this this file):