Whipple Creek Watershed-Scale Stormwater Plan
Otak helped Clark County complete its watershed-scale stormwater plan and comply with its NPDES Phase I municipal stormwater permit.
We used a decade of stream flow and water quality data collected by the County to develop and calibrate hydrologic and water quality models of the 12-square mile Whipple Creek basin. Then, using future build-out assumptions and BMP effectiveness data, we modeled and developed stormwater management options that meet existing and designated uses.
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.
Client: Clark County
Project Manager: Tim Kraft
Type: Water and natural resources, Capital improvement program