Yonkers Contracting Co., Inc.

Scope Of Work

Within ConEdison’s Dunwoodie facility, which is bounded by residential, industrial and commercial properties, Yonkers Contracting Company constructed a new area substation to ensure delivery of reliable electrical service. The new substation included three transformers with room for expansion to five as future load requirements warrant.

The substation building is a pre-cast structure to house the switchgear equipment and transformer pads. Work included all excavation, drainage and backfill of the general site area; cast-in-place concrete foundations; and construction of a precast concrete building, all electrical work in the substation, and retaining walls. A new access driveway and paved parking areas were constructed for the new building.

Existing electrical feeders were re-routed and new feeders were installed along with the substation equipment. Underground utility connections (water, sanitary sewer, fire protection) were also installed.

A moat drainage system was built along with two separate drainage systems to collect storm water runoff from the building roof and adjacent paved areas. Two underground sand filter vaults were built for water quality treatment of storm water runoff.