Subbasin 8 is the upper West Branch of the Susquehanna River  and is the westernmost portion of the drainage.  It ends at the confluence of Sinnemahoning Creek with the West Branch.

Moshannon Creek

Clearfield Creek

Glendale Lake

Chest Creek

Curwensville Reservoir

Anderson Creek

Mosquito Creek

Sinnemahoning Creek – Bennett Branch

Sinnemahoning Creek – Driftwood Branch

West Creek

Sinnemahoning Creek – First Fork

West Branch Subbasin 8 studies

Subbasin 9 is the central West Branch of the Susquehanna River.   This subbasin extends from the confluence of Sinnemahoning Creek to the confluence with Pine Creek in Lycoming County.

Spring Creek

Bald Eagle Creek

Blanchard Reservoir

Fishing Creek

Little Fishing Creek

Beech Creek

Kettle Creek

Young Womans Creek

Pine Creek

Marsh Creek

Babb Creek

Little Pine Creek

Subbasin 10 is the lower West Branch of the Susquehanna River and is the easternmost portion of the drainage.  This subbasin extends from the confluence with Pine Creek to the confluence with the main stem of the Susquehanna River near Sunbury.

Ames Creek

Larry’s Creek

Lycoming Creek

Loyalsock Creek

Little Loyalsock Creek

Muncy Creek

Little Muncy Creek

Chillisquaque Creek

Buffalo Creek

White Deer Creek

White Deer Hole Creek