MultiFunction Debris Boom

The North Fork Dam is one of three concrete diversion dams owned and operated by PacifiCorp on the Rogue River and tributary streams in southern Oregon’s Cascade Mountains and the site of three hydropower plants - Prospect 1, 2 and 4 - with a combined installed capacity of 41.5 MW. The forebay supplies water to the three powerhouses. Two MultiFunction Booms™ were designed for this site to provide enhanced debris guidance and increase operational efficiency by reducing debris loading at the trash rack, and also to protect recreational river users who enjoy Class IV and V whitewater recreation between North Fork Dam and the Prospect I and 2 powerhouses. 

KEY FEATURES

Boom 1

  • Length: 366 feet 
  • Boom Size: Class 1 / 24 inch diameter 
  • Main body with 10 flange bolted sections
  • Four foot deep debris skirt
  • Debris overtopping Guard (DoG)
  • Orange HDPE coating 
  • Concrete embedment shore anchors both end

Boom 2

  • Length: 181 feet 
  • Boom Size: Class 2 / 24 inch diameter
  • Main body with flange bolted sections
  • Four foot deep debris skirt
  • Debris overtopping Guard (DoG)
  • Orange HDPE coating
  • Designed for velocity of 3-5 feet per second
  • Concrete shore anchor upstream end
  • Articulating sections with pad eye fitting attached to dam wall downstream end