Centralia Coal Mine

The mine's average annual production over 1997–2001 was 4.4 million short tons per year; average annual production over the life of the mine was 4.3 million short tons per year.

[3] These coal beds are part of the Skookumchuck Formation, which is composed of nearshore marine and nonmarine sedimentary rocks.

The Skookumchuck Rock belongs to the upper member of the Eocene Puget Group.

The mine began being reclaimed, with the aim of returning the land to its former forested state.

[4] The reclamation includes the fill of the open pits, regrading, and the dredging of water sources, while planting trees and other natural flora.