Whipple Creek Watershed-Scale Stormwater Plan Vancouver, Washington

A decade of stream flow and water quality data collected by the County was used to develop and calibrate hydrologic and water quality models of the 12-square mile Whipple Creek basin. Using future build-out assumptions and BMP effectiveness data, stormwater management options were modeled and developed to meet existing and designated uses.

Hydrologic and Water Quality Models for a Complete Stormwater Plan

The final plan, approved by Ecology, presents a clear analytical approach, findings, and conceptual implementation plan, including cost estimates for stormwater retrofits.
Check out the completed Whipple-Creek watershed-scale stormwater plan on the County’s site. Otak helped Clark County complete its watershed-scale stormwater plan and comply with its NPDES Phase I municipal stormwater permit.