Glacier-Gallup Creeks Alluvial Fan Restoration Project

Glacier-Gallup Creeks Alluvial Fan Restoration Project Vicinity

Status

The Whatcom County Flood Control Zone District (FCZD) is leading an effort to engage affected landowners and the Glacier community in exploring possible modifications to the existing levee system in anticipation of the Glacier Creek Bridge replacement (currently slated for construction in 2026). 

Community Meeting June 25, 2019

Attend a community meeting on June 25, 2019 from 6 - 8 p.m. at Chair 9 (2nd floor) to learn more.  Read the meeting invitation.

Agenda
6:00 - 6:30 Open House
6:30 - 7:15 Project Presentation with question and answer period
7:15 - 8:00 Open House

Project Benefits

  • Improve public safety
  • Reduce levee maintenance
  • Restore salmon habitat
  • Restore alluvial fan processes

Background

The project is located in the community of Glacier on the alluvial fans created by Glacier and Gallup Creeks. Highway 542 and many homes and businesses in the community are at risk of damage during floods. The highway crosses the alluvial fan with two bridge crossings over Glacier and Gallup Creeks. A levee on Glacier Creek and non-engineered berms on Gallup Creek currently provide some protection to the highway and the community. However, the Glacier Creek levee constricts the creek, increasing the energy in the channel which causes bank erosion and damage to the levee. Moreover, the constriction typically leads to upstream sediment build-up which, over time, may reduce the channel capacity and may lead to further erosion or avulsions which is when a creek jumps out of its natural banks.

The highway, levee, and berms have also disrupted natural alluvial fan processes and damaged critical salmon habitats. The Washington State Department of Transportation (WSDOT) is planning to replace the highway bridge over Glacier Creek with a new bridge that will be joined with the recently-constructed Gallup Creek Bridge to create a full span bridge across the two creeks and a significant portion of the alluvial fan between them. 

Learn more about alluvial fan hazards and studies complete to date on Glacier and Gallup Creeks

Project Description

The Glacier-Gallup Creeks Alluvial Fan Restoration Project is a collaborative project between the Whatcom County FCZD and WSDOT to improve public safety for the community of Glacier, reduce maintenance for the Highway 542 bridges, and improve salmon habitat and natural alluvial fan processes. The FCZD is currently evaluating the existing levee system on Glacier and Gallup Creeks in light of the planned bridge reconstruction over Glacier Creek and identifying possible levee system modifications.

The project is in the first phase of a multi-phase effort. The first phase will involve community engagement, an existing conditions evaluation of Glacier and Gallup Creeks within the project area, development of concept alternatives for the levee system, an alternatives analysis, and selection of a preferred alternative. Future phases will advance the preferred alternative for the levee system through detailed design and construction. Construction of the new full span bridge across Glacier and Gallup Creeks is currently slated for 2026.  Download the project area map

Community engagement is vital to the success of this project. Community meetings and close coordination with affected landowners will occur throughout the project to convey technical information and receive feedback from the community. 

Funding 

Whatcom County Flood Control Zone District

Contact

Deb Johnson, PE
River and Flood Engineer
Whatcom County Public Works - River & Flood Division
(360) 778-6288 or djohnson@co.whatcom.wa.us