Bonneville Spillway Emergency Rock Removal Project

Date: 

2012

Location: 

Cascade, OR

Project Specifications: 

  • Agency: U.S. Army Corps of Engineers, Portland District
  • Contract Price: $820,000
  • Completion: 2012
  • Key Elements: Precision Rock Removal in Vulnerable Areas of the Spillway Stilling Basin

Description: 

J.E. McAmis removed cobbles and boulders from within nine different downstream bays of the Bonneville Dam Spillway Stilling Basin. This work was performed utilizing a rotating hydraulic clamshell, BlueView sonar equipment, divers and a 10” airlift induction pump. The project was scheduled for a months time and was completed in 8 days.