Rillito Creek

To provide comments on this watershed for consideration in the Floodplain Management Plan, contact Greg Saxe
Planning Manager
(520) 724-4633.
The Rillito Creek begins at the confluence of the Tanque Verde Creek and Pantano Wash. Its downstream terminus is the confluence with the Santa Cruz River. The Rillito Creek water-shed also includes many of the Catalina Foothills watercourses as well as watercourses that originate in the City of Tucson. Rillito Creek plays a significant role in groundwater recharge. Excluding the Tanque Verde, Pantano and Foothills watersheds, this watershed is comprised of 16,881 acres. Rillito Creek has been largely contained in channel by numerous flood control projects, which have resulted in a string park connected by The Loop bike path. This watershed contains 3,821 acres of SFHA, 409 acres of locally identified floodplain and 763 acres of Pima County Regulated Riparian Habitat.

Flood Hazards


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

Floodplain Studies

Floodplain Study FP-003-1986 - Flecha Caida Flood Improvement Study, Simons, Li & Associates, 1/28/1986.

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

8.10.1 Data Gathering Needs
• No site specific issues identified.

8.10.2 Frequently Flooded Structures and Properties Subject to Damage
• Rillito River breaks-out of the channel near Alvernon Road. (T13S R14E Sec. 27) 
• Rillito River breaks-out of the channel near Dodge Blvd. (T13S R14E Sec. 28)
• There are levee-like conditions upstream and downstream of Swan Road between Alamo Wash and Alvernon Wash, on the south side of the Rillito. (T13S R14E Secs. 26 and 27)
• 3371 E. River Rd. (111-02-003B) - Repetitive Loss Property, with losses claimed in 1993 and 1996. (T13S R14E Sec. 28)

8.10.3 Infrastructure
• Monitor and document the flood water level at the Dodge Blvd. If the water level appears to be within 18 inches of the crossing infrastructure, call the District or 911. (T13S R14E Sec 28)

8.10.4 Safety Concerns
• Do not attempt to cross Dodge Blvd. if the flood water level is near the bridge deck. (T13S R14E Sec. 28)


Recommendation of Actions and Floodplain Management Strategy

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