Roy Sewall Photography

Charles F. Mercer canal boat above Lock 20

for the C&O Canal Nat’l Historical Park , Nat’l Park Service

Eagle I helicopter in Mather Gorge

for the US Park Police, Nat’l Park Service

Crossing the rapids below Great Falls

for Cabin John Fire and Rescue, Montgomery County, MD

Examining a young green snake at BioBlitz

for The Nature Conservancy

MD/DC and VA Chapters

Lock 19, C&O Canal

for the C&O Canal Trust

Attaching the second deck on the Charles F. Mercer

for the Friends of Historic Great Falls Tavern

Snail tracks in the sediment on a maple leaf, under water

for the Potomac Conservancy

Turkey vultures at Great Falls

for the Potomac Riverkeeper

PRO BONO WORK

             Return to Gallery

These are representative photos provided at no cost to federal, state, and local governments as well as to private non-profit organizations.