Holman-Crossway Transmission Line

Holman-Crossway Transmission Line

Location: Webster County, Mo.

Client: Sho-Me Power Electric Cooperative

Completion Date: 2012

Sho-Me Power Electric Cooperative proposed to construct a new substation and 8.5-mile-long, 161-kV transmission line in the western portion of Webster County, Mo. This new line would provide for voltage stability and reliability across Sho-Me's system, provide opportunities for use of green power, and reduce economical costs for consumers through better access to the transmission grid.

To facilitate Sho-Me's request for financial assistance from the Rural Utilities Service (RUS), Burns & McDonnell prepared an environmental assessment (EA) for the project. The EA provided analysis of the Proposed Action and the No Action alternatives. The No Action impacts were determined to be primarily socioeconomic in nature, resulting from the loss of potential economic benefits. The Proposed Action impacts were primarily wildlife, vegetation and water quality during construction activities. The EA was reviewed by RUS and published for public review. The RUS is expected to sign a Finding of No Significant Impact on the project.

Burns & McDonnell obtained aerial photography and topographic maps for the project area. Burns & McDonnell also collected digital data and traditional information on urban areas, jurisdictional boundaries, roads, land use, recreational facilities, state and federal lands, hydrology, and public facilities for the site to be used the environmental assessment. Reports on wetlands, cultural resources, and threatened and endangered species were provided by the client and incorporated into the EA.

  • Agency coordination
  • Environmental analysis

Sho-Me experienced numerous voltage and overload contingency problems in the Marshfield area of the Sho-Me system. According to Sho-Me's analysis of its system, contingency problems were identified with the loss of a 69-kV line, causing two other 69-kV lines to overload. The same contingency caused low voltage to occur at four substations. The loss of one of the two 69-kV lines caused low voltage at three other substations and overloaded two additional 69-kV lines. The solution to these reliability issues was to construct a new substation along an existing 69-kV line and connect the new substation, Crossway, to the Holman substation with a new 161-kV transmission line.