The New York State Public Service Commission (PSC) will not require an investigation of National Grid’s proposed Browns Falls–Taylorville #3&4 115-kV Transmission Lines Refurbishment Project.
The work proposed on the non-Article VII electric transmission facility through the Towns of Fine, Pitcairn, Diana and Croghan in St. Lawrence and Lewis counties in New York has been reviewed, the state Department of Public Service said in its March 30 letter to the company.
As TransmissionHub reported, Niagara Mohawk Power d/b/a National Grid, in a Part 102 Report filed with the PSC on Feb. 2, proposed to conduct the maintenance project on the transmission lines. The refurbishment project is needed to provide system reliability to the electric utility end users, as well as to provide for public safety in areas where structures are damaged or deteriorated and are in need of maintenance, and structure replacement or other methods used to mitigate substandard clearances, the company said.
The scope of the project involves:
- Replacing shieldwire along the entire length of the line
- Replacing 12 structures
- Installing one intermediate structure
- Replacing steel bracing members on 19 steel lattice structures
- Replacing insulators, hardware, grounding, conductor attachment plates, and hanger members on 135 steel flex structures
- Replacing insulators, hardware and grounding on 44 strain structures
- Replacing guys and anchors – about 114 guys and anchors – at 61 structures
The company also said that no additional rights of way (ROWs) are required for the project, the existing or replacement structures will not carry more than two circuits, and no substantial modification will be made to existing vegetative cover within the project corridor.
The Browns Falls–Taylorville Line, as the project is referred, runs for 26.6 miles from the Browns Falls substation in Fine, N.Y., to the Taylorville substation in Croghan.
The only work being done as part of the project that is subject to Part 102 requirements is the replacement of seven structures that require structure height increases of greater than 10 feet, and an increase in the number of structures on the ROW due to the installation of one intermediate structure.
The company added that the height of the replacement structures will be increased from about 74 feet to 77 feet above ground to new heights ranging from 83.5 feet to 102.5 feet above ground.
The company added that project construction is anticipated to begin in April, and the target date for project completion is December 2017.
Among other things, the company said that the preferred overhead option is expected to have a capital construction cost of about $27.8m, while construction of the proposed line as an underground line within the Adirondack Park would result in an estimated $131.4m increase in capital construction costs for the project.
National Grid is a subsidiary of National Grid plc.