Fairfax County Lake Accotink Sedimentation Study

The USGS is monitoring Lake Accotink, Accotink Creek, and Long Branch to better understand sediment flow into and out of the lake.

Lake Accotink is a 55-acre lake in Fairfax County which is highly valued by the local community. Much like a living organism, lakes go through many changes. Several factors affect their health and well-being such as sediment buildup. As the lake fills with sediment, it loses surface area and volume. Lake Accotink is one such lake that is undergoing sedimentation due to heavy development in its watershed.