
The Green River carves a deep valley through the southern portion of this region, separating the residential growth of Covington and Maple Valley from the historic coal-mining corridor near Black Diamond. The landscape is defined by its glacial hydrology, with numerous basins like Lake Sawyer, Lake Morton, and the protected Mooney Swamp shaping the layout of local roads and neighborhoods. Small settlements such as Morganville and Kummer persist as distinct localities, while aviation history is represented by several local strips including Black Diamond Airport and Norman Grier Field. The Black Diamond Cem remains a significant site for local genealogy, marking the community's roots near the banks of Rock Creek.
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This is the sole edition of this map. No revisions or reprints were ever made.