Construction [Denny Network]

Construction Update

City Light's contractor, Shimmick Construction Company, Inc. (SCCI), began construction of the network in February 2016 and is moving into the final stage of construction. Throughout the life of the project, SCCI has installed nearly three miles of duct bank and have conducted work at nearly 30 vaults throughout South Lake Union and the Denny Triangle neighborhoods. Construction continues with roadway restoration and channelization, and a series of small-scale weather-dependent closeout tasks.

Distribution Network

Potholing to confirm utility locations

Excavation

Shoring (trench reinforcement)

Duct Bank Installation

Vault Installation

Back Filling Vault

Temporary Street Restoration

Final street restoration

Locating underground utilities

Excavating and removing concrete and asphalt

Installing duct banks and electrical vaults

Backfilling excavation

Installing permanent concrete and asphalt pavement

Repairing and installing sidewalks, curb ramps and curb bulbs

The Denny Network is being built underground in South Lake Union and the Denny Triangle. Construction is occurring by block and mostly in the public right-of-way. Typical impacts include daytime and nighttime work, parking restrictions, transit and pedestrian detours, dust, and noise. Work sometimes requires lane restrictions and street detours, but streets typically remain open to traffic during construction.Below are examples of what typical construction activity looks like in the project area.Network construction, occurring over a period of approximately 24 months, consists of the following steps: