Virginia Tech, Extension Service2019-11-192019-11-19http://hdl.handle.net/10919/95634Miscellaneous USGS spring gaging equipment - Virginia. Calvin Spring No. 1, Shenandoah National Park, VA.positive, 3.5 x 6 in.image/jpegIn CopyrightApplied ScienceAgricultureVirginia Extension - Project 10Agricultural EngineeringWatershedWater RunoffSoil and Water ConservationPhotographBiological Systems Engineering, Virginia Tech