BOSTI Hydroelectric LLC applied Sept. 30 to the Federal Energy Commission for a successive preliminary permit for the proposed Coon Rapids Dam water power project in Minnesota.
A new permit would allow the applicant to secure and maintain priority of application for a license for the project under Part I of the Federal Power Act while obtaining the data and performing the acts required to determine the feasibility of the project and to support a license application.
The proposed project is located at the existing Coon Rapids Dam, which is owned and operated by the Three Rivers Park District. The Coon Rapids Dam is located upstream of Minneapolis, Minnesota, on the Mississippi River at River Mile 866.2.
There is an old powerhouse at the site that at one time contained five vertical Francis turbine/generator units. The units were removed in 1966, and subsequently the powerhouse was converted into a recreation/observation area.
The new plan for the site is for HYDROMATRIX (HM) plant that will be situated in the stilling basin area downstream from the two spillway sections of SPAN 9 (section between pier 9 and 10) and SPAN 10 (section between pier 10 and the Southwest abutment). The HM plant will feature two powerhouse sections (newly constructed retaining walls) located between spillway Span 9 and Span 10. Each turbine will have a rated output of 590.3 kW at a net head of 17.7 feet. A total of 16 units will result in a maximum plant capacity of 9.45 MW.
There are several alternatives available for interconnection of the hydroelectric plant to the existing transmission grid. The shortest and most direct interconnection would be with the existing 13.8-kV overhead line which is located directly downstream of the existing dam. This interconnection would involve a short length of overhead transmission from the control room to the existing transmission line. In addition, a transformer would be required that would be situated outside and adjacent to the existing control building.
An alternate to the 13.8-kV interconnection would involve using an underground transmission line to interconnect directly with the Xcel Energy substation that is located approximately 550 feet west of the hydroelectric dam. Discussion with Xcel Energy indicates that a decision regarding the best interconnection alternative cannot be made until the project is ready to interconnect.
BOST1 said it has entered into a purchase option agreement with the Western Minnesota Municipal Power Agency (WMMPA) to acquire, construct and operate the project. BOST1 and WMMPA will jointly negotiate with the Three Rivers Park District for an approval to use park land.
A project contact is: Douglas A. Spaulding, BOST1 Hydroelectric LLC c/o Nelson Energy, 8441 Wayzata Blvd., Suite 101, Golden Valley, MN 55426, (952) 544-8133, firstname.lastname@example.org.