The surficial geology in the vicinity of Billings Mill Brook mainly consists of Wisconsinan Till, alluvium, and several others.

[1] Billings Mill Brook joins Tunkhannock Creek 2.78 miles (4.47 km) upstream of its mouth.

[1] A large mass of partially quarried sand and gravel occurs at the mouth of Billings Mill Brook.

Wetlands, peat bogs, lakes, and bedrock consisting of sandstone and shale also occur in the watershed's surficial geology.

From the lake's outlet, water drops 130 feet (40 m) over several rock ledge waterfalls to Billings Mill Brook.

[3][6] The former variant name appears in Israel C. White's 1883 book The geology of the North Branch Susquehanna River Region in the six counties of Wyoming, Lackawanna, Luzerne, Columbia, Montour and Northumberland.

[8] A prestressed box beam or girders bridge carrying State Route 1002 over Billings Mill Brook in Tunkhannock Township was built in 1990 and is 21.0 feet (6.4 m) long.

A concrete slab bridge carrying State Route 1001 over the stream in Tunkhannock Township was built in 2006 and is 61.0 feet (18.6 m) long.

[6] Williams Companies and the Pennsylvania Department of Environmental Protection once worked together to carry out the Billings Mill Brook Stream Habitat Enhancement Project.