Mining efforts in the Northeastern States contributed to the high risk scores of network catchments in the 2015 inland assessment. The very high risk region of southern Maine and central New Hampshire has a concentration of active and legacy mines. Sand, gravel and rock are dominant mining products in that area, along with heavy metals such as lead, zinc, and tungsten which also actively mined. The high risk area along both sides of the Connecticut River between Vermont and New Hampshire contains a large number of mines, which predominately excavate sulfur, copper, zinc, iron, molybdenum, and beryllium. Limestone is heavily mined along the western border of Vermont as well as along the I-90 corridor in New York, which both have current [...]
