Loureiro Contractors, Inc. (LCI) performed site and concrete work for a major upgrade of the electrical service to the Yale Sterling Chemistry Laboratory (SCL) Building. Specific components of the project included traffic control measures; erosion control; mass rock and earth excavation; concrete-encased electric duct bank; cast-in-place concrete electrical vault; site drainage piping; installation of a temporary retaining wall; and temporary site restoration.
Loureiro first installed traffic control measures, erosion controls and designed and installed a temporary retaining wall to support a large tree. Loureiro accomplished the rock excavation by line drilling and the use of an excavator mounted demolition hammer. Once the rock and earth excavation was complete, Loureiro constructed the entirely cast-in-place concrete electrical vault. The vault was 28’W x 70’L x 14’H and included footings, walls, roof slab and parapet walls. The new electrical vault was installed immediately adjacent to the existing building. Loureiro excavated the nearly 300- foot-long electrical duct bank and encased it with concrete. The excavated earth was temporally stockpiled and reused for backfilling of the vault.
Not only was the project constructed during an extremely cold winter season, it was completed on schedule and within budget. The existing building was not damaged by the immediately adjacent rock excavation, and the large tree also survived the project construction.