The Bloomfield Colliery is located south of East Maitland and lies within the Maitland and Cessnock local government areas.

The coal bearing seams mined in the Bloomfield Lease are in the Tomago Coal Measures.  Located below the Newcastle Coal Measures, the seams include the Rathluba, Big Ben, Donaldson, Elwells Creek, Whites Creek, followed by the uncorrelated A, B, and C seams and the Buttai seams.