AFton 2

The Project uses flows from the Periodic Springs, which supplies water for the Town of Afton’s municipal water system in accordance with a state water right that allows the Town of Afton to withdraw up to 13.58 cubic feet per second (cfs) for municipal use. The project diverts up to 12 cfs of the flow from the water supply system to use for power generation after which the Town returns the water to the water supply system for treatment and municipal consumption.

Project Name Culinary Water System
LIHI Certificate Number 101
LIHI Effective and Expiration Dates June 13, 2016
June 13, 2026
Owner Town of Afton
State Wyoming
Location Located on Swift Creek in Afton, Wyoming.
Installed Capacity 225 KW
Average Annual Generation Approximately 1.2 GWh
Facility Type Diversion
FERC No. 13301

The project consists of: (1) an existing intake at Periodic Springs, which flows to; (2) an existing 870-foot-long, 14-inchdiameter pipe, that carries water to; (3) an existing 97,000-gallon buried concrete surge tank, connecting to; (4) about 16,725 feet of the existing 16,775-foot-long, 18-inchdiameter iron ductile waterline; (5) a new approximately 95-foot-long, 2-foot-diameter ductile iron penstock that diverts flows from the existing 18-inch diameter waterline to the new powerhouse; (6) a new 31-foot-long by 20-foot-wide powerhouse containing a single Pelton turbine and generator with an installed capacity of 225 kW; (7) a new approximately 10-foot-long, 2.5-foot-diameter draft tube discharging flows from the powerhouse to the water storage tank; and, (8) appurtenant facilities. The power generated is delivered through the generator leads to the existing 12.5-kilovolt (kV) distribution system at the Culinary Water Treatment Plant; therefore, the project will not have a primary transmission line.

Prior to the project, water from Periodic Springs was piped to a buried concrete surge tank, and then conveyed to the water treatment facility by a buried waterline. After pressure reduction and chlorination in the water treatment facility, the water flowed into a large concrete water storage tank. Now with the Project in place, instead of water flowing directly to the water treatment facility, the Town diverts up to 12 cfs of flow at a bifurcation to a new powerhouse containing a Pelton impulse type turbine and a generator.  The turbine discharge flows into the existing large concrete water storage tank.

The project boundary incorporates lands occupied by project structures and includes the intake, the surge tank, and the flow line at and above the bifurcation, penstock, and the generating facilities. The project boundary encompasses 8 acres of federal land in the Bridger-Teton National Forest, managed by the Forest Service.

Afton 1

Afton 3

Certification History

Harrington Park, New Jersey (January 27, 2016) –  On December 5, 2016 LIHI Executive Director Shannon Ames issued a Preliminary Certification Decision that the Culinary Water System Hydroelectric Project (FERC No. P-13301) continues to satisfy the LIHI Certification Criteria. Because the application met the Not Applicable/De Minimis Effect standard for all criteria, the certification term will be 10 years.

As provided for in Section 4.2.5 of the LIHI Handbook, notice of the preliminary decision to certify was posted on the Institute’s website and sent to this stakeholder email distribution list on December 5, 2016.  A 30-day period was provided to anyone who commented on the original application to request an appeal, and no requests for appeal were received.

The Culinary Water System Hydroelectric project is now deemed certified by LIHI for a 10-year term. The effective certification date for the Culinary Water System Project is June 13, 2016, expiring on June 13, 2026.

December 5, 2016 – LIHI Executive Director Shannon Ames has issued a Preliminary Certification Decision that the Culinary Water System Hydroelectric Project (FERC No. P-13301) continues to satisfy the LIHI Certification Criteria. Because the application met the Not Applicable/De Minimis Effect standard for all criteria, the certification term will be 10 years.

As provided for in Section 4.2.5 of the LIHI 2nd Edition, the Preliminary Certification Decision to certify, along with the Application Reviewer’s report and (if prepared) report of the Executive Director, will be posted on the Institute’s Web page for 30 days, beginning December 5, 2016 and ending January 5, 2017.  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.  The appeal request must state specific reasons why the hydropower facility should have failed one or more criteria.  If an individual or organization did not comment on the initial Application Package, they may not file an appeal.  Further information about the LIHI appeal process is available in the LIHI Handbook, available at http://lowimpacthydro.org/certification-program-html/.

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 Culinary Water System Project is June 13, 2016 for a ten (10) year term, which will expire on June 13, 2026.

September 9, 2016:  The Culinary Water System certificate has been granted an extension of the current certificate term. The new expiration date is December 31, 2016. See the extension letter for explanation below.

August 5, 2016: On July 6, 2016, the Low Impact Hydropower Institute received a complete application for a new term of Low Impact Certification for the Culinary Water System 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 Culinary Water System 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 “Culinary Water System 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 October 5, 2016 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.

January 30, 2013: The Culinary Water System Hydroelectric Project has been certified as low impact for a five year term, effective June 13, 2011 and expiring June 13, 2016.


Files:

2016 Re-certification

2011 Certification