Illinois 150 ILLINOIS Known as the Prairie State, Illinois exhibits a length of 378 miles and a width of 210 miles, with its 56,000 sq. mi. sloping slightly to the southwest. Containing more than 275 rivers, the state is bounded along ¾ of its circumference by navigable waters, primarily the Ohio and Mississippi rivers.
Wastewater is generated during the mining process from groundwater produced during ore extraction, from water used by operators for equipment cooling and dust control, and from precipitation entering mines. Wastewater is also produced during the ore milling and .