Collaborative Drainage System Repair on Birch Point

Construction on this project is scheduled to begin August 15, 2016 and continue through September 2016.  Contact Kraig Olason, Senior Planner at Whatcom County Public Works with questions at (360) 778-6301.

Project Goals

  • Replace a failing stormwater outfall pipe subject to overflow
  • Significantly reduce the risk of flooding and erosion on a steep bluff
  • Address a priority safety problem  
Project Description

This project will replace a stormwater system that carries flows from central Birch Point under Semiahmoo Drive and across Washington State Department of Natural Resources (DNR) property to Semiahmoo Bay. This area is subject to high flows during winter storms. The existing outfall pipe is undersized and becomes overwhelmed during storm events, causing flooding and erosion on the beach bluff and threatening homes on DNR leased land. This is a collaborative project funded by BBWARM and other Whatcom County Public Works funds.

The new drainage system will include: 
  • a larger cross culvert under Semiahmoo Drive.
  • a new outfall pipe anchored above the fragile beach bluff.
  • a new energy dissipater at the end of end of the outfall pipe.
DNR outfall location map

Project Location Map

Old outfall pipe to be replaced.

Existing outfall pipe with eroding bluff.

 
Postcard sent to Birch Point residents affected by construction activities.








Construction Year: 2016

Engineer: GeoEngineers, Inc.

Contractor: Bianchi Construction

Construction Contract: $244,000

Documents