Like other pyridine derivatives, 2-methylpyridine is often reported as an environmental contaminant associated with facilities processing oil shale or coal, and has also been found at legacy wood treatment sites.

The mine continued to process coal from other collieries following its closure.

Harco mine was closed April 25, 1951, but the coal washer continued to process coal until 1954.

In 1908, the L&W-B abandoned the second breaker and began to process coal from the Washington mine at the Nottingham breaker.

By 1909, a second breaker was built, intended to process coal from several D & H mines.

That year, a new reinforced concrete breaker, called the Loree No. 5 Breaker, was built to process coal from all of the D&H operations in Plymouth.

When processing coal by more than one supplier like power stations and heat plants, coal homogenization can serve well as a strategy of processing the coal in order to get to the best acceptable quality.

Efforts were soon made to discover ways to process anthracite coal to achieve the desired uniformity.

The tipple at Bellevue continued to process coal from WCC's Grassy Mountain open-pit, but was removed in 1962 after that operation closed.

Of special concern are a pair of plants that would process coal in Brazil, partly for export back to China.