This unit is primarily river basin ground which is primarily agricultural crops except for the Saddle Mountain National Wildlife Refuge which allows no hunting. The Bur of Reclamation is the centerpiece in the Columbia Basin which provides water storage for irrigation and hydroelectric powerplants, flood control, recreation, and fish and wildlife benefits. White Bluff in the national wildlife refuge is found on the highest ground and borders the Columbia River. Overall the unit is relatively flat with the southern tip around 350-ft. This is all excellent mule deer habitat and an important wintering area for mule deer which typically start migrating in October. Mild winters can cause a delay and the deer will remain up north.

Cattle have overgrazed and hurt most of the local deer habitat.