Winooski No. 8 Hydroelectric Project (FERC No. 6470)

Winooski No. 8 Hydroelectric Project

The Winooski 8 hydroelectric project is located in E. Montpelier, Vermont, on the site of a dam originally constructed in 1908.  The project was reconstructed in 1985 and has an installed capacity of 930 KW.  Annual energy production has averaged 3,500,000 KWH. The intake and powerhouse are an integral structure, housing three submersible adjustable propeller turbines, driving induction generators, together with associated hydraulic, mechanical, electrical and electronic equipment.

Project Name Winooski No. 8
LIHI Certificate Number 77
LIHI Effective and Expiration Dates February 28, 2016
February 28, 2021
Owner Winooski Hydroelectric Company
State Vermont
Location Located in East Montpelier, Washington County, Vermont, on the site of a dam originally constructed in 1908.
Installed Capacity 930 KW
Average Annual Generation 3,500,000 KWh
Facility Type Run-of-river
FERC No. 6470

The Winooski No. 8 Project consists of:

  1. Concrete gravity dam 227-feet-long with a maximum height of 26-feet (29.3-feet with flashboards);
  2. A seven acre impoundment with a capacity of 34 acre-feet at elevation 613.5 – feet MSL;
  3. A 200-foot long 7-foot diameter fiberglass penstock ;
  4. A 750-square-foot concrete powerhouse containing three turbines with a combined installed capacity of  930-KW ; and,
  5. A 5,000-foot long13-kv transmission line.

The project operates in strict run-of-river mode, utilizing 32’ of gross head between the headwater and average tailwater.  The 200’ bypass reach is provided with 25 CFS of minimum flow.  The project is served by 199 square miles of Winooski River watershed.

The intake and powerhouse are an integral structure, housing three submersible adjustable propeller turbines, driving induction generators, together with associated hydraulic, mechanical, electrical and electronic equipment.

The powerhouse is constructed of reinforced concrete to the 500 year flood elevation.  A pad mounted transformer connects the station to 3-phase 13KV electrical service.

Certification History

April 21, 2017: On April 18, 2017, LIHI issued a Preliminary Certification Decision that the Winooski No. 8 Hydroelectric Project (FERC No. P-6470) continues to satisfy the LIHI Certification Criteria.

As provided for in Section 4.2.5 of the LIHI 2nd Edition Handbook, the Preliminary Certification Decision, along with the Application Reviewer’s report will be posted on the Institute’s Web page for 30 days.  Notice of the posting will be provided to all individuals or organizations that commented on the initial Application Package.

Any Commenter may submit a letter to the Executive Director requesting an appeal within the 30-day period, which begins on April 21, 2017 and ends at 5 pm EDT on May 21. 2017.  The appeal request must state specific reasons why the hydropower facility should have failed one or more criteria.  Only individuals or organizations that commented on the initial Application Package may file an appeal.  Further information about the LIHI appeal process is available in the LIHI Handbook.

If no appeal is requested within the 30-day period, the Executive Director will issue LIHI Certification for the facility and post a notification of certification on the Institute’s website.  Once final, the effective certification date for the Winooski No. 8 Project is February 28, 2016 for a five (5) year term, which will expire on February 28, 2021.

December 16, 2016: The Winooski No. 8 Project has been granted a third extension of the current certificate term. The new expiration date is March 31, 2017. See the extension letter for explanation below.

The Winooski 8 comment period has been extended to January 22, 2017.

November 21, 2016: The Low Impact Hydropower Institute has received a complete application for a new term of Low Impact Certification for the Winooski 8 Hydroelectric project. The application materials can be found in the Files section below.

LIHI is seeking public comment on this application.  Specifically, we are interested in knowing whether you think the Winooski 8 project continues to meet the LIHI Low Impact Certification Criteria.  Please review the program and criteria in LIHI’s revised Handbook and then review the Project’s 2016 application materials posted on the project page.  Comments that are directly tied to specific LIHI criteria (flows, water quality, fish passage, etc.) will be most helpful, but all comments will be considered.  Comments may be submitted to the Institute by e-mail at comments@lowimpacthydro.org with “Winooski 8 Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, PO Box 194, Harrington Park, New Jersey 07640.  Comments must be received at the Institute on or before 5 pm Eastern time on January 20, 2017 to be considered.  All comments will be posted to the web site and the applicant will have an opportunity to respond.  Any response will also be posted.

September 9, 2016: The Winooski No. 8 Project has been granted an additional extension of the current certificate term. The new expiration date is December 31, 2016. See the extension letter for explanation below.

December 22, 2015: The Winooski No. 8 Project has been granted an extension of the current certificate term. The new expiration date is August 26, 2016. See the extension letter for explanation below.

October 27, 2011: The Winooski No. 8 Hydroelectric Project has been certified as low impact for a five year term, effective February 28, 2011 and expiring February 28, 2016.

April 28, 2011: Public comment period has been closed.

February 28, 2011: The Winooski Hydroelectric Company has submitted an application for certification of the Winooski No. 8 Project. Public comment period has been opened for 60 days.

 


Files:

2016 Re-certification

2011 Certification