The existing treatment facility along Austin Street was constructed around 2008. Due to flooding concerns, a portion of the upper system is not currently in use. The new system will install an impermeable liner to reduce the flooding downstream, pre-settle the stormwater to reduce sediment entering the infiltration area, and distribute the flows evenly throughout the treatment system. Typical Bioretention soil is not recommended near phosphorus-sensitive waters like Lake Whatcom. Instead, the system will use the new High Performance Bioretention Soil Mix (HPBSM) designed to capture phosphorus and other pollutants better.
Project Engineer
360-778-6265
[email protected]
322 N Commercial Street
Bellingham, WA 98225
The existing treatment facility along Austin Street was constructed circa 2008. Due to reports of flooding the system needed to be taken off-line. The system experienced uneven sediment distribution, sediment impedes infiltration through the media. Typical Bioretention soil is not recommended near phosphorus sensitive waters like Lake Whatcom.
The new system will install an impermeable liner to reduce the flooding downstream, will pre-settle the stormwater to reduce sediment entering the infiltration, and will distribute the flows more evenly throughout the treatment system. The system will use a new High Performance Bioretention Soil Mix (HPBSM) that is designed to be better at capturing phosphorus and other pollutants.
$971,250 Department of Ecology
$250,000 REET
$268,000 LWSU