Rio Sonoyta Wash

To provide comments on this watershed for consideration in the Floodplain Management Plan, contact Greg Saxe
Planning Manager
(520) 724-4633.
The watershed extends from both sides of the Ajo Mountains. It includes Pia Oik Wash draining the eastern slopes that supplies Menager’s Lake within the Tohono O’odham Nation. As well as a series of washes that drain across the Sonoyta Valley west of the mountains toward Lukeville and eventually the Sonoita River within the Mexican State of Sonora. This watershed is comprised of 267,232 acres and contains 45 acres of SFHA and 5,345 acres of Pima County Regulated Riparian Habitat.

Flood Hazards


Click HERE to view the watershed map
Click HERE to view the hazard map

Floodplain Studies

There are currently no floodplain studies in this watershed other than those conducted by FEMA that are provided on the Flood Insurance Rate Maps.

Erosion Studies

There are currently no erosion studies in this watershed.

Areas of Interest (Known Issues, Gaps, Problems and Needs)

Issues Provided by Public and Stakeholder Input

No issues have been identified to date.

Issues from the District Flood Response Manual

No issues have been identified to date. 

Recommendation of Actions and Floodplain Management Strategy

This section to be completed based on feedback received through the planning process.