3 Underground Transmission Projects

3 Underground Transmission Projects

Location: Las Vegas

Client: Nevada Power Co.

138-kV Loop-in to Strip Substation Underground Transmission Project

Burns & McDonnell provided design for two circuits of 700 feet of 138-kV, 2,000-kcmil XLPE cable. The project included 300 feet of 36-inch diameter steel casing 20 feet below Sands Avenue. The overhead transmission line was constructed underground for the Nevada Monorail Project and went from riser structures to a 138-kV gas-insulated substation. The design consisted of calculating the ampacity, sheath voltage rise, grounding requirements and cable pulling. The drawings consisted of plan and profile drawings with associated details and cable vault details for connection into the gas insulated substation.

138-kV Palace Station Underground Transmission Project

Burns & McDonnell provided design of 1,300 feet of 138-kV, 2000-kcmil XLPE cable. The project was constructed to eliminate the overhead transmission lines in front of Palace Station along Sahara Avenue. The project included tying into an existing 30-inch diameter HDPE casing 10 feet deep under the I-15 interchange. The design consisted of calculating the ampacity, sheath voltage rise, grounding requirements and cable pulling. The drawings consisted of plan and profile drawings with associated details.

138-, 69- and 12-kV Flamingo Underground Transmission Project

Burns & McDonnell provided an engineer-procurement-construction specification for the request of bid for the Flamingo Underground Project. The project consisted of approximately 3,200 feet of two 138-kV circuits, one 69-kV circuit and four 12-kV circuits. The project will eliminate the high voltage overhead lines from I-15 to Audrey Street along Flamingo Boulevard in front of Caesar's Palace, Bellagio, Flamingo and Bally's. The project consisted of an ampacity study, cable pulling, survey, plan and profile drawings and incorporation of Nevada Power Company's transmission and distribution standards.