Alder Creek Hydromodification Impacts Assessment

cbec, inc. was contracted by MacKay & Somps, at the suggestion of Sacramento County DWR, to assess hydromodification impacts of the planned Glenborough at Easton development on Alder Creek.

Modified Draft Sacramento Stormwater Quality Partnership (SSQP) Hydromodification Management Plan (HMP) performance criteria were applied to hydraulic model results from long-term continuous simulations developed for existing and project conditions.

The hydromodification assessment for Glenborough at Easton demonstrated that erosion potential (EP) criteria were met when planned water quality (WQ) basins were modified and additional upslope basins were added to minimize potential hydromodification effects along Alder Creek’s entire length below Prairie City Road to Lake Natoma.

Waterbody / Watershed

Alder Creek

Service Areas