PROJECT AWARDED – Bonneville Dam Powerhouse 2 Oil/Water Separator

Category Archives: Project Awarded

PROJECT AWARDED – Bonneville Dam Powerhouse 2 Oil/Water Separator

In March this year, Northbank Civil and Marine, Inc. was awarded the Bonneville Dam Powerhouse 2 Oil/Water Separator project for $5,943,700.00.

The work consists of the installation of two new oil water separators in the existing ice and trash chute at Bonneville Dam Powerhouse II, installation of piping to the new oil water separators from the head cover pumps for all generating turbines including the fish units on the north end of the powerhouse. Work will start onsite July 2019 and be completed in early 2020.


PROJECT AWARDED – McNary Dam Fish Outfall Pipe Emergency Repairs

In January, Northbank Civil and Marine, Inc. was awarded the emergency repair for the McNary Dam Fish Outfall Pipe for $351,950.00.

We successfully completed of removing the damaged portions of walkways, replacing grout pads and anchor bolts, removing damaged portions of sprinkler system, securing remaining walkways, and adding a navigational sign and light on the end of the outfall. All work had to be completed by the end of February.


Project Awarded – Detroit Dam Tainter Gate Rehabilitation

Northbank Civil and Marine, Inc. was recently awarded the Detroit Dam Tainter Gate Rehabilitation project for $13,075,000.

The work consists of the rehabilitation of 6 tainter/spillway gates. This includes structural strengthening the gates, full replacement of the all the gate hoist equipment, replacement of the trunnion bearing systems, and replacing the switchgear, limit switches, lighting and gate control systems. Onsite work will begin in 2019 and are scheduled to complete 3 gates per season (October 15 through January 31 annually) with the project end date in 2022.


Project Awarded – Lower Granite Dam PIT Tag Monitoring Installation

Northbank Civil and Marine, Inc. was just awarded the Lower Granite Dam PIT Tag Monitoring Installation Design-Build project for $5,711,972. Design will start immediately and onsite work is scheduled to begin in September 2018.

Work consists of modifying spillbay 1 and installing 11 new PIT Tag monitoring antennas (to monitor juvenile fish passage) into the spillway ogee. Requires partial concrete demolition of the spillway ogee and embedding the new antennas into the concrete and pouring concrete over the top. Also includes installation of the monitoring building, equipment and control system next to the spillbay.


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