Arlington National Cemetery Millennium Project Stream Restoration

Arlington County, Virginia
Owner: U.S. Department of the Army

Arlington National Cemetery (ANC) was projected to run out of internment spaces by 2025. The Millennium Project provided a combination of columbarium, casket in-ground burials, and cremated in-ground burials, totaling 27,000 additional burial spaces extending the capacity for an estimated additional 7-12 years of internments.  Wetland Studies and Solutions, Inc. (WSSI) performed numerous tasks in support of the Millennium Project, including a stream restoration design for ± 1,900 linear feet of degraded stream channel that serves as a prominent natural landscape amenity for the project. In support of the design, WSSI developed 6-inch contour interval topography and performed a tree survey. WSSI also was instrumental in obtaining approval of the project from various regulatory agencies related to impacts to Waters of the United States (WOTUS), encroachments into the Resource Protection Area, and assistance with various studies included as part of the Environmental Assessment prepared by the U.S. Army Corps of Engineers.

WSSI also designed an underground stormwater management (SWM) facility to reduce flow rates from a parking lot on ANC property that discharges on to National Park Service property. The outflow from the facility was reduced to that of a forested condition using the Energy Balance method of SWM.  WSSI developed a restoration design for the eroded outfall channel utilizing Regenerative Stormwater Conveyance design methodologies. The stream restoration and stormwater management facility are complete.  WSSI provided periodic site inspections as requested by the client throughout project construction.