The United States Geological Survey (USGS ... DC. The generated maps are designed to serve as a valuable tool for predicting oil spill presence and movement in the Potomac River, supporting ICPRB’s ...

(WTOP/Dave Dildine) The streamflow of the Potomac River has been so low for the past ... feet threshold is “kind of a heads-up number for us that we’ve got to start paying attention.” ...