The Urban Drainage and Flood Control District (UDFCD) in partnership with the City of Aurora, have initiated an Outfall Systems Plan (OSP) for the Quincy Drainage, Shop Creek, and Meadowood Drainageway watersheds. The study will evaluate the condition and capacity of the existing drainage system and provide recommendations for stormwater infrastructure improvements. Michael Baker International was selected to complete the project.
Quincy Drainage (0.8 square miles) and Shop Creek (1.0 square miles) are tributaries to Cherry Creek Reservoir. Both watersheds are fully developed upstream of the State Park with a combination of commercial along with single and multi-family residential developments. The drainages are primarily closed conduit underground systems east of S. Parker Rd and open channel with some closed conduit west of S. Parker Rd. The watersheds were studied as part of an OSP in 1985 (Boyle Engineering Corporation, June 1985). Many of the recommended improvements in the 1985 OSP have been implemented, but neither watershed has been studied since the original OSP. Meadowood Drainageway (2.6 square miles) is a left bank tributary to West Toll Gate Creek. The watershed is almost fully developed and consists of primarily single family residential with some commercial and multi-family residential. Meadowood Drainageway is an engineered channel with grade control structures every ~500 ft to 1000ft. The present day channel and grade control structures were designed and constructed in the early to mid-1980's. The upper reach of the Drainageway was rehabilitated in the late 1990's. The Meadowood Drainageway is represented on the effective FEMA Flood Insurance Rate Map (FIRM) as an approximate Zone A for most of the reach. The flood hazard information shown on the FIRM was originally incorporated in 1982 and has remained unchanged since. An OSP has never been completed for Meadowood Drainageway.