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

Hinshaw pipeline

Energy; Coal

A pipeline or local distribution company that has received exemptions from regulations pursuant to the Natural Gas Act. These companies transport interstate natural gas not subject to regulations ...

Master-metering

Energy; Coal

Measurement of electricity ornatural gas consumption of several tenants or housing units using a single meter. That is, one metre measures the energy usage for several households collectively.

Land-use restrictions

Energy; Coal

Constraints placed upon mining by societal policies to protect surface features or entities that could be affected by mining. Because laws and regulations may be modified or repealed, the ...

Holding company

Energy; Coal

A company that confines its activities to owning stock in and supervising management of other companies. The Securities and Exchange Commission, as administrator of the Public Utility Holding Company ...

Maximum deliverability

Energy; Coal

The maximum deliverabilityrate (Mcf/d) estimated at the present developed maximum operating capacity.

Landfill gas

Energy; Coal

Gas that is generated by decomposition of organic material at landfill disposal sites. The average composition of landfill gas is approximately 50 percent methane and 50 percent carbon dioxide and ...