EPHRATA — A new 115-kilovolt transmission line to a planned electrical substation near Royal City will run along Road D Southwest. The route was one of three options.

Grant PUD’s new transmission line will connect Frenchman Hills to the planned Red Rock substation southeast of Royal City, which is designed to address increasing demand for electricity in the Royal City area. Red Rock substation is scheduled for completion in 2022, the same time as the transmission line. The original project was expanded to include reconstruction of the transmission line from the Frenchman Hills substation to Royal City.

The selection of a route was announced at a commission meeting on Tuesday.

The cost for the line work was estimated at $10,051,000. Commissioners had approved the project as part of the 2020 budget.

— Cheryl Schweizer