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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


Watershed Map 
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.

Step 6 - Floodplain Management Plan Goals

Floodplain Management Plan Goals

Recommendation of Actions and Floodplain Management Strategy

Rio Sonoyta Action Plan Map

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Regional Flood Control District

201 N. Stone Avenue, 9th Fl.
Tucson, AZ 85701

Phone: (520) 724-4600
Fax: (520) 724-4621

Customer Service Hours:
8:00AM - 4:00PM

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