Bed Stabilization

Pabco Weir, one of the first grade control structures built on the Wash - April 2004

The purpose of channel bed stabilization is to reduce channel bed erosion by slowing stream flow to less erosive conditions while providing a stable platform for vegetation establishment. This will be accomplished through the construction of 22 grade control structures (also known as weirs, or low height dams) along the Wash within the next several years.

Completed Structures

• Demonstration Weir – completed 1999; however, the weir will be moved and reconstructed as the Demonstration Replacement Weir in 2007
• Pabco Weir – completed 2000
• Historic Lateral Weir – completed 2000
• Fire Station Weir – completed 2000
• Monson Weir – completed 2002
• Visitor Center Weir – completed 2002
• Bostick Weir – completed 2003
• Rainbow Gardens Weir – completed 2004
• Calico Ridge Weir – completed 2004
• Powerline Crossing Weir- completed 2006

Structures in Construction (with expected groundbreaking date)

• Upper Diversion Weir and Eastern Diversion Channel-2008

Planned Structures (with expected groundbreaking date)

• DU Wetlands No. 1 Weir – 2006
• DU Wetlands No. 2 Weir – 2006
• Upper Narrows Weir – 2007
• Duck Creek Confluence Weir – 2007
• Homestead Weir – 2007
• Lower Narrows Weir – 2007
• Silverbowl Weir – 2007
• Sunrise Mountain Outfall Weir – 2008
• D-14 Extension Weir – 2009
• Tropicana Outfall Weir – 2009
• Wells Weir – 2010