About the Projects
Preliminary Permit History
Kenai Hydro, LLC (KHL) was granted a Preliminary Permit by FERC to study the feasibility of the Grant Lake Project (FERC No 13212) the Falls Creek Project (FERC No. 13211), the Ptarmigan Lake Project (FERC No. 13210) and the Crescent Lake Project (13209). Since receiving these site investigation permits, KHL has determined that Ptarmigan Lake and Crescent Lake will not proceed.
Grant Lake/Grant Creek and Falls Creek Project
Kenai Hydro, LLC (KHL) was issued two preliminary permits effective October 1, 2008 to investigate hydropower projects at Grant Lake/Grant Creek (FERC Project No. 13212) and Falls Creek (FERC Project No. 13211). This Pre-Application Document describes a combined Grant Lake/Falls Creek Hydroelectric Project that includes a proposed Grant Lake/Grant Creek development, and a Falls Creek development to divert water from Falls Creek to Grant Lake in order to supplement generation capacity at the powerhouse located on Grant Creek. The Falls Creek diversion is no longer under consideration.
The hydroelectric potential of this site has been evaluated several times as a potential power source for the Seward/Kenai Peninsula area. In 1954, R.W. Beck and Associates (cited by APA 1984) prepared a preliminary investigation and concluded that a project was feasible. The U.S. Geological Survey (USGS) conducted geologic investigations of proposed power sites at Cooper, Grant, Ptarmigan, and Crescent Lakes in the 1950s (Plafker 1955). In 1980 CH2M Hill (cited by APA, 1984) prepared a pre-feasibility study for a Grant Lake project and concluded that a project developed at the site would be feasible. The Grant Lake Project was referenced in the 1981 U.S. Army Corps of Engineers (USACE) National Hydroelectric Power Resources Study (USACE 1981). The most extensive study was performed by Ebasco Services, Inc. in 1984 for the Alaska Power Authority (now Alaska Energy Authority; APA 1984). Two of the alternatives evaluated by Ebasco included the diversion of adjacent Falls Creek into Grant Lake to provide additional water for power generation. This report relies on the Ebasco report for the basis of the current technical conclusions with regard to hydrology, geotechnical, and environmental considerations.
The Alaska Power Authority (APA) and Ebasco conducted detailed environmental studies of water use and quality; aquatic, botanical and wildlife resources; historical and archaeological resources; socioeconomic impacts; geological and soil resources; recreational resources; aesthetic resources; and land use (APA 1984).
Ebasco (APA 1984) compiled a detailed feasibility report on the Grant Lake hydroelectric project, including environmental issues. The Arctic Environmental Data Center (AEIDC 1983) and USFWS (1961) conducted environmental baseline studies in the project area.
Crescent Lake Project History
The Crescent Lake Project was referenced in the 1981 U.S. Army Corps of Engineers (USACE) National Hydroelectric Power Resources Study (USACE 1981). The U.S. Geological Survey (USGS) conducted geologic investigations of proposed power sites at Cooper, Grant, Ptarmigan, and Crescent Lakes in the 1950s (Plafker 1955). Continuous flow data were collected by USGS stream gages installed on Crescent Creek; one gage (#15253000) measured flows at the head of Crescent Creek from 1957 to 1960 and the other (#15254000) measured flows at the Quartz Creek Road bridge from 1949 to 1966. Under its preliminary permit, Kenai Hydro, LLC is investigating the feasibility of historical and additional alternative project configurations. All specifications identified are considered provisional and are based on the above historical documents and preliminary field reconnaissance efforts. Based on research in the field, Kenai Hydro, LLC may modify design parameters as appropriate.