Ruling on two 345-kV Southwest Power Pool lines in Missouri due next year

The Missouri Public Service Commission (PSC) issued an order on Nov. 7 consolidating the proceedings for two dockets related to two transmission line projects for the Southwest Power Pool (SPP) region and setting the procedural schedule for the consolidated docket.

Dockets included under the order were Transource Missouri’s application to build the Iatan-Nashua and Sibley-Nebraska City lines and a related request from Kansas City Power & Light (KCP&L) to transfer ownership of certain transmission facilities for the Iatan-Nashua project to Transource Missouri.

SPP approved Iatan-Nashua as a balanced portfolio upgrade in 2009 and Sibley-Nebraska City as a priority project in 2010. SPP subsequently assigned KCP&L as the designated transmission owner responsible for building the projects.

KCP&L plans to designate Transource Missouri as the alternate transmission owner of the projects, and Transource Missouri ultimately will build and own the two lines.

Transource Missouri is a subsidiary of Transource Energy, which is co-owned by American Electric Power (NYSE:AEP) and Great Plains Energy (NYSE:GXP) (GPE).

KCP&L is a subsidiary of GPE.

The 30-mile, 345-kV Iatan-Nashua line – estimated at $65m – would run from KCP&L’s Iatan substation in Platte County, Mo., to the company’s Nashua substation in Clay County, Mo. Transource Missouri expects to place the transmission line in-service in 2015.

The 175-mile, 345-kV Sibley-Nebraska City line would run between the Nebraska City substation near Maryville, Mo., and an existing substation near Sibley, Mo. 

This project is estimated at $380m and is expected to be placed in service in 2017.

In connection with the Iatan-Nashua project, KCP&L is seeking to transfer to Transource Missouri, at cost, a certain portion of a 161-kV line running from the Nashua substation to a point approximately 15 miles to the northwest. This portion of the line, according to the application, will be retired and replaced by a new 345-kV line constituting an eastern segment of the Iatan-Nashua line.

Rebuttal testimony in the consolidated docket starts in January 2013, and a decision is due in May 2013, according to the PSC schedule.