Energy Resources pursues 12-MW hydro project on Mississippi River

Energy Resources USA Inc. applied Sept. 2 to the Federal Energy Regulatory Commission for a preliminary permit for the proposed Lock and Dam No 25 Hydroelectric Project, which would use the existing Lock and Dam No 25 structure, located on the Mississippi River approximately three miles east of Winfield in Lincoln County, Missouri.

The project facilities are owned and operated by the U.S. Army Corps of Engineers St. Louis District.

A preliminary permit allows a developer three years of exclusivity, with no competing applications accepted during that time, to look at project feasibility, with a license application then needed to advance the project further.

The proposed development of the site involves the construction of a new 12-MW hydropower facility at the southwest side of the existing Lock and Dam No 25. The dam, which is 1,296 feet long, consists of 14 tainter gates and three roller gates. 

A new reinforced concreted powerhouse, 90 feet by 220 feet in plan, will be constructed downstream of the existing overflow bank adjacent to the right riverbank. The powerhouse will contain the turbine-generators, switchgear, controls, and ancillary systems, as well as shop and storage space. The new tailrace will connect the powerhouse to the river downstream.

Four vertical Kaplan turbine-generators rated at 3 MW each will be installed in the new powerhouse for a total capacity of 12 MW. A 15 MVA 4.16/115 kV three-phase step-up transformer will be located adjacent to the powerhouse in a new, 50-foot wide by 60-foot long substation. The substation will also contain high side and low side disconnects and will be surrounded by a containment dike and a security fence.

The applicant has identified existing transmission infrastructure in the proposed project area. These existing transmission elements will be evaluated during the permit period through field investigations and discussions with the local utility. It is anticipated that the project will utilize a single overhead three phase, 115-kV line which is approximately 7.69 miles in length, extending southwest from the substation and following the existing access road to where it continues to the potential interconnection point. The potential interconnection point is an existing T-line 115 kV.

A project contact is: Ander Gonzalez, Energy Resources USA Inc., 2655 Le Jeune Road, Suite 804, Coral Gables, Florida 33134, +34 93 252 38 40,

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.