1. U.S. Geological SurveyLeetown Science CenterAquatic Ecology Branch11649 Leetown RoadKearneysvilleWest Virginia25430USA
2. U.S. Fish and Wildlife ServiceMaryland Fishery Resources Office177 Admiral Cochrane DriveAnnapolisMaryland21401USA
3. National Park ServiceShenandoah National Park3655 Highway 211 EastLurayVirginia22835USA