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Roy Sewall Photography |
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Charles F. Mercer canal boat above Lock 20 for the C&O Canal Nat’l Historical Park , Nat’l Park Service |
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Eagle I helicopter in Mather Gorge for the US Park Police, Nat’l Park Service |
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Crossing the rapids below Great Falls for Cabin John Fire and Rescue, Montgomery County, MD |
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Examining a young green snake at BioBlitz for The Nature Conservancy MD/DC and VA Chapters |
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Lock 19, C&O Canal for the C&O Canal Trust |
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Attaching the second deck on the Charles F. Mercer for the Friends of Historic Great Falls Tavern |
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Snail tracks in the sediment on a maple leaf, under water for the Potomac Conservancy |
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Turkey vultures at Great Falls for the Potomac Riverkeeper |
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PRO BONO WORK |
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These are representative photos provided at no cost to federal, state, and local governments as well as to private non-profit organizations. |






