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Energy Wanapum Spillgate Rehabilitation
Construction workers in hard hats and safety vests assemble a red steel framework using ladders and a crane on an outdoor industrial site beside a river, with mountains and power lines in the background.
Project Location
Grant County, WA
Client Grant County PUD
Market Sector
Project Type
  • Power Generation
Services Provided

Project Highlights

  • MacKay Sposito collaborated with the contractor and Grant County PUD to suggest alternative construction methods that saved time and cost.
  • The inspection team closely monitored safety compliance, especially regarding risks from heavy gate components and fall hazards.
  • Staff worked proactively with the contractor to identify tasks that could proceed during high wind conditions, helping maintain the project schedule.

Project Description

The Wanapum Spillgate Rehabilitation project focused on a comprehensive four-year upgrade of all twelve spill gates at Wanapum Dam on the Columbia River in Grant County, Washington. The scope of work included lead abatement and repainting of all gate surfaces and trunnion arms, refurbishing and replacing trunnion bearings and bushings, installing friction sensors, and correcting alignment. The project also replaced side gate seals to ensure optimal operational performance.

MacKay Sposito provided full-time construction inspection services during swing shifts to support Grant County Public Utility District No. 2’s staff. Their involvement was critical in ensuring quality control, enhancing job site safety, and maintaining construction momentum despite environmental challenges.