Brazos Electric Power Cooperative, in an Oct. 14 application filed with the Public Utility Commission (PUC) of Texas, said that it plans to build about 2.04 to 4.96 miles of 138-kV double circuit transmission line with single-pole structures in Collin County, Texas.
The Kittyhawk Transmission Line and Substation Project involves about 4.08 miles to 9.92 miles of circuit, depending on the route chosen.
A new approximately five-acre substation would be sited along or near SH 121 (Sam Rayburn Tollway) in the vicinity of Alma Drive or Exchange Parkway in western Collin County. The transmission line would connect the substation to an interconnection point located along an existing transmission line either to the east, northeast, west, or southwest of the substation, depending on the route selected, Brazos Electric added.
The proposed project would include one of these substations: Brazos Electric’s Craig Ranch substation, Lebanon substation, and an Interconnect between Oncor Electric’s North Allen and Sloan Creek substations.
The transmission line right of way (ROW) would be about 70 feet to 100 feet wide, Brazos Electric added, noting that it will own the project, which is not located within a competitive renewable energy zone (CREZ).
The project need is driven by rapid load growth and development in the study area, as well as associated service reliability. Brazos Electric also said that as load growth increases, the consequences of an outage in a significant population area present too great a risk without a new substation supply source.
The study area considered for substation location and transmission line routing options is located in western Collin County and encompasses a suburban area, which includes portions of the cities of Frisco, Plano, Allen and McKinney. The project study area, Brazos Electric added, consists primarily of undeveloped land and residential subdivisions, and contains businesses, places of worship, schools, parkland, public/municipal/utility facilities, and sports fields.
According to the estimated schedule, ROW and land acquisition would begin in October 2017 and be completed in June 2018; engineering and design would begin in December 2017 and be completed in June 2018; and material and equipment procurement would begin in June 2018 and be completed in November 2018. Construction of the facilities would begin in November 2018 and be completed in April 2019, and the facilities would be energized in May 2019.
The estimated total cost for the transmission facilities is about $16.2m, and about $9.3m for the substation facilities, Brazos Electric added, noting that those estimates are based on “Route 11,” which has the lowest estimated cost of the routes proposed.
Among other things, Brazos Electric said that Route 11 is the shortest route; impacts as few habitable structures (two) as any other option; is within 1,000 feet of fewer cemeteries than other options; and crosses fewer streams, open water, wetlands, pasturelands, and woodlands than many other options. Brazos Electric also noted that the route has less feet of visual foreground for parks and highways than many other route options.