Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Industry: Energy

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Coal

Site characterization

Energy; Coal

An onsite investigation at a known or suspected contaminated waste or release site to determine the extent and type(s) of contamination.

Coal-cutting machine

Energy; Coal

Underground mining equipment. A cutting machine is used in conventional mining to undercut, top cut, or shear the coal face so that coal can be fractured easily when blasted. It cuts 9 to 13 feet ...

Purchased

Energy; Coal

Receipts into transportation, storage, and/or distribution facilities within a state under gas purchase contracts or agreements whether or not billing or payment occurred during the report year.

Single purpose project

Energy; Coal

A hydroelectric project constructed only to generate electricity.

Underground gas storage

Energy; Coal

The use of sub-surface facilities for storing gas that has been transferred from its original location. The facilities are usually hollowed-out salt domes, geological reservoirs (depleted oil or gas ...

Open access

Energy; Coal

A regulatory mandate to allow others to use a utility's transmission and distribution facilities to move bulk power from one point to another on a non discriminatory basis for a cost-based fee.