GROUPE serves as the principal surveyor, planner and site engineer for the first phase of development at Stone Ridge, a 400-acre residential and commercial development located in Loudoun County, near Route 50 and Gum Spring Road (Rt. 659). When completed, the community will consist of more than 2,600 single-family and attached homes with approximately 2.9 million square feet of commercial, retail, and office space and a community center. The 400-acre project includes multi-family townhomes, single-family detached residential land bays, and commercial, retail and industrial land uses.

The firm’s responsibilities include topographic surveying, stormwater management, subdivision plats, grading plans and site plans, as well as water distribution analysis and design, sanitary sewer and construction stakeout. The sanitary sewer system design includes over 23,000 LF of collection lines for 640 residential units and 4,200 LF of 12-inch outfall/trunk line. The design will also include VDOT-compliant design plans and profiles, erosion control, grading, striping and signage plans for over two miles of streets with two major intersections at US Route 50.

Two stormwater management ponds were required.  Each pond provided peak attenuation and BMP volumes for their respective watersheds.  Included with these designs are two floodplain studies totaling 4000 linear feet of stream bed.  The first stormwater pond is designed as a wetlands mitigation area with high and low marsh areas, a micro-pool and a sediment forebay.  The facility provides BMP volume and 2 and 10-year detention for the 144-acre drainage area.  The second stormwater pond is a dry pond providing BMP volume and detention for the western portion of Stone Ridge (North).  It is located on a tributary to South Fork, Broad Run Creek.  Federal Emergency Management Agency (FEMA) floodplain issues were also a factor in this design.