In One Month, The Chesapeake Bay’s ‘Most Critical’ Pollution Issue Could Be Unsolvable

www.thinkprogress.org/climate/2014/08/08/3467685/chesapeake-bay-pollution-conowingo-dam/
"Today, approximately 175 million tons of polluted sediment sits trapped behind the Conowingo hydroelectric power dam in northeastern Maryland, a product of nearly a century of build-up from clay, silt, fertilizer runoff, and sewage plant runoff from Pennsylvania and New York. The sediment — enough to fill about 80 football stadiums — contains phosphorus, nitrogen, and other harmful nutrients that can cloud waters, sprout toxic algae bacteria, harm ecosystems, kill aquatic life, and sully drinking water."