Friends of Dyke Marsh is a volunteer group dedicated to preserving, restoring and enhancing Dyke Marsh, a freshwater tidal marsh in Fairfax County on the Potomac River just south of Alexandria, Virginia. The Dyke Marsh Wildlife Preserve is administered by the National Park Service.

What Is Dyke Marsh?

The Dyke Marsh Wildlife Preserve is a freshwater, tidal marsh on the Virginia side of the Potomac River in Fairfax County. It is a unit of the George Washington Memorial Parkway, U.S. National Park Service. For more information, visit the NPS website at www.nps.gov/gwmp.

FODM Presents Dyke Marsh Photo to Senator Tim Kaine

Senator KaineFODM presented pictures of the Dyke Marsh Wildlife Preserve to our federal elected officials, in appreciation of their support of our efforts and the preserve: Senators Mark Warner and Jim Webb and Congressmen Jim Moran, Gerry Connolly and John Dingell. On August 1, FODMers Glenda Booth, Ned Stone, Trudi Hahn and Dorothy McManus met with Senator Tim Kaine and gave him a photograph of the marsh, taken by Ned Stone.

New Buoys Mark River Boundaries

By Erik Oberg, Biologist, NPS

BuoyBuoy at the Belle Haven Marina. Photo by NPS.On September 27, NPS's Natural Resources and Lands staff marked Dyke Marsh's federal boundary in the Potomac River with 11 buoys. This marks the end of four years of work to secure the approvals, permits and funding to help visitors see and understand the full extent of Dyke Marsh and how much land has eroded since the NPS began managing the marsh.

Working as a team, park staff safely moved and set over 3,300 pounds of concrete anchors, buoys and chain. With excellent satellite reception, anchors were placed within 17 inches of the target for every location. Each anchor was given enough chain to allow for site-specific water depth, anchor sinkage, tide and peak flood variation.

In addition to placing all 11 boundary buoys, NPS staff also gave assistance to U.S. Geological Survey researchers by extracting three soil cores from the marsh. These cores will be analyzed to provide a millennium-scale climate record of the region and supplement a new joint publication.