Eversource Energy (NYSE:ES) said on its website that construction on its 10.4-mile Frost Bridge to Campville 115-kV Transmission Project in Connecticut is estimated to begin – pending all necessary approvals – in 4Q16.
The line, which will be located entirely within the company’s existing transmission line right of way (ROW), will traverse the towns of Watertown, Thomaston, Litchfield and Harwinton to connect Eversource’s Frost Bridge substation in Watertown with its Campville substation in Harwinton. The company also said that new equipment would be installed at the Frost Bridge and Campville substations.
The company noted that it plans to reconfigure the two 115-kV lines where they cross the Naugatuck River at the Litchfield/Harwinton town lines, adding that those lines are currently jointly supported on common transmission structures. The reconfiguration will allow each line to be supported by its own set of structures, thereby increasing system reliability, the company said.
The project’s estimated in-service date is in 2018, the company said.
Eversource also said on its website that the estimated in-service date for its 115-kV 1810 Transmission Line Upgrade Project is December 2016, with completion of restoration expected in summer 2017.
That project traverses 3.5 miles on existing transmission line ROWs through Bristol and Southington in Connecticut. Eversource added that it is replacing 14 existing structures, reinforcing 10 existing structures, and re-wiring 3.5 miles of the existing line. Existing equipment would be upgraded at the Southington substation, within the existing fence line, the company said.
Eversource noted that construction on the project began in June, and that construction is occurring in two sections – the southern section, which consists of replacing existing structures and installing new line, and the northern section, which consists of reinforcing existing structures and installing new line.
In addition, the company noted on its website that the estimated in-service date is 4Q17 for its Bloomfield-Windsor Transmission Upgrade Project, which involves separating 6.9 miles of an existing transmission line in Bloomfield, Conn., and moving it from existing structures onto new structures. Eversource said it is also installing new equipment at the North Bloomfield and Bloomfield substations. In Windsor, the company said that it is reconfiguring an existing transmission line outside of the Rood Avenue substation, as well as adding new equipment and expanding the substation’s fence line.
Another project that the company continues to work on is its Greater Hartford-Central Connecticut Reliability Project, which involves a new, underground, 3.8-mile, 115-kV transmission line in Connecticut. The company added on its website that the line would be built between the company’s Newington substation in Newington, Conn., and its Southwest Hartford substation in Hartford, passing through portions of Newington, West Hartford and Hartford.
The company said that it will also upgrade its Newington and Southwest Hartford substations with new equipment, as well as install other upgrades at its substation in Berlin, to support the new line.
Construction is estimated to begin – pending all necessary approvals – in 1Q18, and the project is estimated to be in service in 4Q18, the company said.
Of its 115-kV Greenwich Substation and Line Project, the company said on its website that the project will extend about 2.3 miles between the company’s existing substation on Sound Shore Drive in Cos Cob to the proposed new substation on Railroad Avenue. The project, which involves two 115-kV underground transmission lines and one new transmission-level substation, is needed to address increasing customer demand and to improve reliability of electric supply in Greenwich, Conn., the company said.
Pending all necessary approvals, construction on the project would begin this fall, and the project is estimated to be in service in 2Q18, the company said.
Eversource also noted on its website that it is proposing to build a new 3.4-mile, 115-kV overhead transmission line and to make related substation improvements – the Southwest Connecticut Reliability Project – to enhance its ability to reliably serve the electrical demand in the southwest Connecticut area.
The line, which would be located entirely within the company’s existing transmission line ROW, would cross through the towns of Bethel, Danbury and Brookfield in Connecticut, the company said, adding that the line would extend from the Plumtree substation – near Walnut Hill Road in Bethel – to the Brookfield Junction, near Park Ridge Road in Brookfield.
The project involves making related modifications to the Plumtree substation in Bethel and the Stony Hill substation in Brookfield, the company said.
Pending all necessary approvals, construction on the project would begin in 1Q18, and the project is estimated to be in-service by the end of 2018, Eversource said.