Bouse Wash drains into the Imperial Reservoir at the north end of the Colorado River Indian Reservation, south of Parker. The Tyson Wash mouth is at the southern end of the reservation. The Bouse Watershed abuts the Tyson Watershed. The Bouse and Tyson Wash river mouths are both on the eastern shore of the Imperial Reservoir, on the Colorado River.
The Bouse Wash Watershed is west of a water divide that the Centennial Wash Watershed flows east from. Centennial is a tributary of the Gila River. Its confluence with the Gila is downstream from the confluence of the Hassayampa River, which flows south from Prescott and drains the western and southwestern regions of the Bradshaw Mountains.
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