Coal pits were located in several places around Charleston, mostly along Darkies Terrace Rd, including one started in the 1950s on the former Charleston School site.
A report by Simon Nathan in 1972 estimated that 500,000 tonnes of coal had been mined from the Charleston-Brighton coalfield up to then, with a peak of more than 80,000 tonnes in 1944-52.
Although close to the surface, Charleston coal is reportedly high in sulphur but with fairly low ash. One historical account from 1866-67 says the deposit was so shallow, one man accidentally ignited a seam with his campfire and after it had smouldered for a year or so the goldfield commissioner called for tenders to put it out.
Bathurst general manager corporate relations Sam Aarons said it was a "low key expression of interest'' which would involve five to seven exploratory holes over five years.
Sometimes the company had picked up permits, done work, and relinquished them.
"This is not a priority for us, the Escarpment (Denniston) is.''