This NASA satellite image appeared in the August 2012 U.S. Geological Survey report that confirmed the exponential loss of trapping capacity in the Conowingo Dam reservoir, and has since served as a calling card for the Coalition. We added the Maryland county jurisdictional boundaries.
Here are the staggering numbers behind the photograph of the 100-mile long sediment plume emanating from the Conowingo Dam a few days after Tropical Storm Lee in September 2011, according to the U.S. Geological Survey:
Estimated amounts transported into the Bay during this single storm event are shown below:
42,000 tons nitrogen
10,600 tons phosphorus
19 million tons sediment (of which 4 million tons was scoured from the reservoir)
115,910 tons nitrogen
14,070 tons phosphorus
71,000 tons nitrogen
3,300 tons phosphorus
2.5 million tons sediment
What will the next significant watershed storm event do to the Bay and to the restoration efforts below the Conowingo Dam?