Blake D. DeMarr, P.E.Nov 12, 20191 minWashington, D.C.D.C.'s "Surveying Commandments"A mousepad sent to us from the District of Columbia Association of Land Surveyors. Rewritten here for easier reading: "DC's 'Surveying...
Blake D. DeMarr, P.E.Nov 12, 20191 minHistoryThe Duvall Foundry - Georgetown, D.C.From picture above: "The Duvall Foundry 1050 - 30th Street, N.W. Built between 1856 and 1866 as a machine shop by William T. Duvall, The...
Jake Kirkwood, P.E.Nov 12, 20192 minWashington, D.C.Boundary Stones in the District of ColumbiaIn April 1791, at the behest of President George Washington, 40 sandstone markers were placed during a multi-year boundary survey of the...
Blake D. DeMarr, P.E.Nov 12, 20191 minWashington, D.C.Measuring the Potomac River Height at Georgetown Waterfront ParkDid you know there is a USGS streamgage at the Georgetown Waterfront Park? This one of many streamgages that measure the height...
Blake D. DeMarr, P.E.Nov 12, 20191 minWashington, D.C.Washington DC's Oldest StructureBuilt in 1766, The Old Stone House at 3051 M Street, NW in Georgetown, DC is the oldest structure in the district...