Case Study

Knollwood Life Plan Community

District Stormwater, in partnership with Knollwood Life Plan Community, has completed a bioretention facility bordering the Knollwood parking lot in addition to planting new trees throughout the grounds. The new bioretention facility will treat and capture an estimated 2.2 million gallons of runoff rainwater annually, helping to clean the stormwater before it reaches Rock Creek, the Potomac River, and ultimately the Chesapeake Bay. This project will generate 264,411 High Impact SRCs that will be sold on the SRC market. These credits will be re-certified and placed back on the market every three years.

The project at Knollwood Life Plan Community has successfully:

• Treated over 2.2 million gallons of stormwater annually

• Planted over 50 trees

Located adjacent to Rock Creek Park, this project directly impacts the health of Rock Creek. It also creates a green space accessible for residents and community members to enjoy. By retaining stormwater and planting trees, the downstream waterways benefit from decreased erosion, sediment, and pollution.

Mount Olivet Cemetery

District Stormwater and the Catholic Archdiocese of Washington have completed the first two phases of a three-phase green infrastructure project at the historic Mount Olivet Cemetery at 1300 Bladensburg Rd NE, Washington, DC 20002. Since completion, the project has generated 475,902 SRCs, which have all been sold on the SRC market. These credits are then re-certified and placed back on the market every three years. The third phase will be completed 2022 and will add approximately 70,000 new SRCs.

The project at Mount Olivet Cemetery has successfully:  

• Treated over five million gallons of stormwater annually.

• Planted over 200 trees.

• Removed 1.34 acres of impervious surface.

Located in the Hickey Run watershed these improvements directly impact the health of Hickey Run, which runs to the Anacostia River and eventually to the Chesapeake Bay. By retaining stormwater, planting trees, and removing impervious surfaces, the waterways benefit from decreased erosion, sediment, and pollution.