BIRCH BAY DRIVE & PT. WHITEHORN ROAD DRAINAGE IMPROVEMENTS

Construction on this project is scheduled for September-November 2019.

For more information, contact Kraig Olason, Senior Planner, Whatcom County Public Works, 360-778-6301.

PROBLEM DESCRIPTION

In December 2017, the failure of a corrugated metal outfall pipe on Point Whitehorn caused significant slope failure on a steep bluff to the shoreline, posing a critical public safety issue and the potential loss of personal property. The replacement of this outfall was scheduled for construction in 2021, but this pipe failure called for emergency action. A temporary flexible pipe (see photo below) has been installed until a permanent solution can be constructed. Tetra Tech, Inc. was hired to develop conceptual design options and provide engineering design services for the preferred solution, which is to by-pass the current outfall and route water to an existing discharge point just east of Point Whitehorn Road. This is rated as a high priority project in the Birch Bay Subwatershed Master Plan and proposed six-year plan.

Recent discussions between BBWARM and the Birch Bay Water and Sewer District (BBWSD) revealed that both districts were planning utility repair projects in the same corridor from Pt. Whitehorn Road to Holeman Avenue. Coordination of these projects will save both districts money and lessen the impact to the neighborhood. Therefore, the scope of the original design contract with Tetra Tech was amended in June to include a larger project area that aligns with BBWSD's waterline maintenance project.

This project is under development - more information will be added soon. Check back for updates.



Documents:

  • Click here to view the January 16, 2019 presentation to the BBWARM Advisory Committee meeting.

PHASE 1: SLOPE STABILIZATION

PROJECT DESCRIPTION:

In December 2017, the failure of a corrugated metal outfall pipe on Birch Bay Drive caused a significant slope failure on a steep bluff to the shoreline, posing a critical public safety issue. The replacement of this outfall was scheduled for construction in 2021, but this pipe failure called for emergency action. Temporary repairs were installed immediately, with the majority of the final repair constructed in early January 2019 (see photo sequence below). In May 2019, an additional storm drainage line was installed near the top of the bank toward the roadway to complete the project.

Construction Year: 2019

Engineer of Record: Tetra Tech, Inc.

Contractor: Iverson Earth Works, LLC

Construction Contract Amount: $38,000

PHASE 2: DRAINAGE IMPROVEMENTS

PROJECT DESCRIPTION

This project will improve drainage along Birch Bay Drive by installing an upsized storm pipe conveyance system along Birch Bay Drive between Pt. Whitehorn Road and Holeman Ave. This project will also construct a new outfall off of Pt. Whitehorn Road into an existing pond as the existing outfall ditch to the Beaver Pond is becoming heavily incised and eroded.

The proposed system is designed to convey the 100-year storm event and the new pipe sizes will vary from 12” to 24” in diameter, with approximately 25 new catch basins.

The project design is complete and all environmental permits were submitted in May 2019. Underground utility conflicts have been identified and relocated. Construction is anticipated to begin September 16th, 2019 and will require approximately 2 months to complete, weather dependent.

The aerial map below shows the regions where the new stormwater infrastructure will be constructed for the project.

Construction Year: 2019

Engineer of Record: Tetra Tech, Inc.

Contractor: Iverson Earth Works, LLC

Construction Contract Amount: $820,608.86

PROJECT UPDATES

8/28/2019

Phase 2: The project designs are complete and underground utility conflicts have been resolved by BBWSD. Iverson Earth Works was the lowest bidder for phase 2 of the Birch Bay Drive drainage improvement project, and construction is expected to begin on Monday, September 16,2019. This phase of construction is expected to last approximately 8 weeks. Public Notice signs have been posted on either end of the construction zone.

2/10/2019

Phase 1 of the Birch Bay Drive & Pt. Whitehorn Road Drainage Improvements Project involved stabilizing the slide area on Point Whitehorn and routing stormwater away from the bluff. Iverson Earth Works spent six days in January clearing vegetation, debris and loose material from the slide area and stabilizing the slope with rock. The full drainage improvement project along Birch Bay Drive from Holeman Avenue to Point Whitehorn Road (Phase 2) will be completed in the fall in coordination with the Birch Bay Water & Sewer District. Click here to view the project presentation shown at the January 16, 2019 public meeting.

12/12/2018

Iverson Earth Works was the lowest bidder for the Birch Bay Drive Outfall Improvements Slope Stabilization project and construction is expected to begin in the next week or so. They will be providing emergency repair services related to stabilizing a slide area and routing stormwater away from the bluff. The full drainage improvement project along Birch Bay Drive from Holeman Avenue to Point Whitehorn Road will be completed next year in coordination with the Birch Bay Water & Sewer District.



PROJECT AREA