The Wells Hydroelectric Project is located on the Columbia River in Chelan, Douglas, and Okanogan Counties in Washington. The project is owned and operated by Public Utility District No. 1 of Douglas County (Douglas PUD). Douglas PUD began operation in 1945 as a locally owned distribution system. In 1957 construction began on the Wells project and the first power was generated in 1967.

The Project is located near the cities of Pateros, Brewster, and Bridgeport on the Columbia River at river mile 515.6. The upstream dams are Chief Joseph, operated by US Army Corps of Engineers (USACE), at river mile 454.1 and Grand Coulee, operated by US Bureau of Reclamation, at river mile 596.6. The immediate downstream dams are the other Mid-Columbia projects owned and operated by Public Utility District No 1 of Chelan County and Public Utility District No 1 of Grant County; Rocky Reach Dam (Chelan) at river mile 473.4, Rock Island Dam (Chelan) at river mile 453.4, Wanapum Dam (Grant) at river mile 415.8, and Priest Rapids Dam (Grant) at 397.1. The dams farther downstream are the federal projects, all managed by USACE; McNeary Dam at river mile 292, John Day Dam at river mile 215.6, the Dalles Dam (Dalles Dam North Paso de peces hydro installation is LIHI Certificate #71) at river mile 191.5, and the Bonneville Dam at river mile 146.1.

The project consists of a presa, reservoir, tailrace, switchyard, transmission line, upstream and downstream paso de peces facilities, a fish hatchery, and recreational facilities. The dam is a 1,165-foot-long, 160-foot-high, hydrocombine structure with 10 vertical Kaplan turbines, 11 aliviaderos, upstream and downstream fish passage facilities, and a switch yard. The hydrocombine is a unique design that incorporates the central eléctrica, spillways, switchyard, and fish facilities all in one unit instead of separate structures. Six of the generating units have been refurbished and each has a nameplate capacity of 89 MW, four are yet to be upgraded and each currently have a nameplate capacity of 77.4 MW, with upgrades are expected to be complete in 2027. Each of the 10 units has a hydraulic discharge range from 13 (minimum load) to 22 kcfs (full hydraulic capacity). Each aliviadero is 46 feet wide with spill controlled by a 66 foot high gate.

The fish passage facilities include two upstream fish ladders and a downstream juvenile bypass system. One fish ladder is located at each end of the hydrocombine, and each ladder includes a pump system for providing attraction flows to the ladder entrance, a counting station, a fish trap and sorting facility, and Passive Integrated Transponder (PIT) tag detection equipment. The downstream juvenile bypass system consists of fabricated steel barriers that are seasonally inserted into spillway bay numbers 2, 4, 6, 8, and 10. The steel barriers are 72 feet high and block all but a 72-foot-high by 16-foot-wide vertical slot through each spillway entrance; they are designed to collapse when the spillway puertas are opened more than six feet.

The project also includes the Wells Hatchery, located on the downstream side of the west contrafuerte of the Wells Dam.

Historial de certificaciones

October 21, 2024: The appeal period has been paused pending receipt of new information.

3 de octubre de 2024: The Low Impact Hydropower Institute (LIHI) has preliminarily approved Low Impact Certification for the Wells Dam Hydroelectric Project (pending LIHI #203). The full application and reviewer’s report are available below. This decision is preliminary pending the 30-day appeal window. Only those who commented on the initial applications during the 60-day comment period are eligible to file an appeal. Such appeal needs to include an explanation as to how the Projects do not meet the LIHI criteria. Appeal requests can be submitted by email to comentarios@lowimpacthydro.org with “Wells Dam Appeal Request” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 68 Harrison Ave Ste 605, PMB 113938, Boston, MA 02111-1929. Las solicitudes deben recibirse antes de las 5:00 p. m., hora del Este, el 3 de noviembre de 2024.. All requests will be posted to the website. The applicant will have an opportunity to respond and any response will also be posted. If no appeal requests are received the certification term will be July 9, 2024 through July 8, 2037.

28 de mayo de 2024: The Low Impact Hydropower Institute has received a complete application for Low Impact Certification of the Wells Dam Hydroelectric Project.  LIHI is seeking public comment on this application.  Specifically, we are interested in knowing whether you think the Project meets the LIHI Low Impact Certification Criteria, as revised in the 2nd Edition Handbook.  Please review the program and criteria in LIHI’s revised Manual y luego revise los materiales de solicitud del Proyecto a continuación. Los comentarios que estén directamente relacionados con criterios específicos de LIHI (flujos, calidad del agua, paso de peces, etc.) serán de gran ayuda, pero se considerarán todos los comentarios. Los comentarios pueden enviarse al Instituto por correo electrónico a comentarios@lowimpacthydro.org with “Wells Dam Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 1167 Massachusetts Avenue, Arlington, MA 02476. Comments must be received on or before 5 pm Eastern time on July 27, 2024 Se considerarán todos los comentarios. Se publicarán en el sitio web y el solicitante tendrá la oportunidad de responder. También se publicarán todas las respuestas.

Archivos de certificación

• Wells Dam LIHI Certification Review Report 2024
• Wells Dam Certification Application 2024
• Wells Dam letters of appreciation 2024
• Colville Tribe comment email 2024

Documentos clave

• 2012 FERC License, Water Quality Certification, and Fishway Prescriptions
• 2011 FERC Environmental Impact Statement
• 2007 Off-License Settlement Agreement
• 2002 Habitat Conservation Plan