Virginia Tech, Extension Service2019-11-192019-11-191905-04-23http://hdl.handle.net/10919/95625Original W-I weir, Blacksburg, Va.1 negative, 2.5 x 4.25 in.image/jpegCreative Commons Public Domain Mark 1.0Applied ScienceAgricultureVirginia Extension - Project 10Agricultural EngineeringWatershedWater RunoffSoil and Water ConservationPhotograph