Friday, January 28, 2011
The Montgomery County Division of Transportation Engineering (MCDTE) received a Top Storm Water Management project award from Water Quality Solutions magazine for the Mont rose Parkway West ’s stormwater management system. The road was completed in May 2009.
To meet regulatory requirements, MCDTE was required to provide stormwater facilities that captured and treated the equivalent of 90 percent of the annual runoff from the project’s impervious surfaces for a one-inch storm. Installation of stormwater management facilities was complicated because of the limited space within the Mont rose Road right-of-way and the need to avoid impacting the wetlands adjacent to Old Farm Creek.
To manage stormwater, MCDTE found a creative way to install four, large, pre-cast, structural sand filters within the Mont rose Road median during construction while maintaining traffic flow (averaging 55,000 vehicles a day) and the existing storm drainage system.
- The final project reduced and mitigated stream impacts from the road by:
- Replacing existing culverts that conveyed Old Farm Creek under Mont rose Road ;
- Installing a precast, 16’x 9’ culvert to contain an Old Farm Creek tributary crossing;
- Stabilizing 1,200 linear feet of Booze Creek;
- Creating 9,000 square feet of forested wetlands on the site; and
- Narrowing the road’s travel lane widths from 12 to 11 feet.
POSTED AT: 7:00:00 AM