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Year Completed: 2009

Government/Industrial

Renovation




ML&P Plant Cooling Repairs

UNIT COMPANY (UNIT) was called on to provide immediate support to a catastrophic failure that shut down a major power plant and electricity producer in Anchorage, Alaska.

During testing of its cooling water lines, ML&P had a failure in one of its huge 36” cooling water pipes that resulted in a tremendous amount of water loss. This failure created extensive damage by removing tremendous amounts of soil from underneath the building structure and undermining the building foundation, as well as breaking the concrete slab and causing the slab on grade to be pushed up as much as 8” above its initial elevation.  Also caused by the failure, numerous pieces of support equipment was pushed out of their correct alignment and were rendered useless.

UNIT received a call within an hour of the event and mobilized labor and equipment the same day notice to proceed was given.  The retrofit work was performed seven days a week to minimize the impact of Plant #2 being shut down.  We incorporated elaborate dust control devises to minimize the impact of construction activities in an active power generation facility.  We quickly analyzed the specialized trades required to perform the repair work and selected firms based upon their availability and local resources, and was quickly able to meet the needs of ML&P.

We rapidly solved issues that were encountered during the investigation process by continuous daily coordination with both the building operators and the designers of the project.  Issues encountered included caverns underneath the building large enough for people to walk through, and soil underneath structural footings that was forced out by the tremendous water pressure.

Due to UNIT already being mobilized and the shut down caused by the piping failure, ML&P also directed us to complete upgrades desired to the existing plant.  These upgrades included improving a wastewater treatment tank and adding drywells around the building.  This also resulted in highly accurate and audited cost accounting and daily tracking for both the insurance companies and ML&P funding.

We were able to maintain a close working relationship with plant operators to minimize any impact the repair construction activities had on the facilities that remained in operation.
 

Additional Photos

ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs
ML&P Plant Cooling Repairs