Tanque Verde Creek

To provide comments on this watershed for consideration in the Floodplain Management Plan, contact Greg Saxe
Planning Manager
(520) 724-4633.
The Tanque Verde Creek watershed includes the Tanque Verde Creek and two of its largest tributaries, the Aqua Caliente Wash and Sabino Creek. The Tanque Verde Creek’s headwa-ters are on both sides of Redington Road in the Rincon and Santa Catalina mountains. This watershed contains some of the largest networks of springs, surface flows and shallow groundwater anywhere in Pima County. Excluding the Agua Caliente and Sabino Creek watersheds, this watershed is 70,199 acres, of which over 50,409 acres is preserved as open space. Tanque Verde Creek is prone to large flash floods that can cause significant damage to homes and property. The District has documented numerous flooded homes along the north bank of the Tanque Verde including within the Forty Niner Country Club Estates subdivision. Flows often frequently close several road crossings, which limits access in the area. Flood insurance is highly recommended and area residents are advised to plan ahead and know alternate routes to get to their destination when roads are closed. This watershed contains 3,821 acres of SFHA, 3,646 acres of locally identified floodplain and 12,232 acres of Pima County Regulated Riparian Habitat.

Flood Hazards

Maps

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

Floodplain Studies

Floodplain Study FP-007-1988 - Ventana Canyon Estates, Erosion Setback Limits, Osborn, Petterson, Walbert and Associates, 2/4/1988.

Floodplain Study FP-017-1992 - Fortyniner's Interior Drainage Improvements, PC DOT&FCD, January 1992

Floodplain Study FP-030-1994 - Hydrologic/Hydraulic Report for Palo Verde Ranch, ICON Consultants USA, Inc., 7/1/1994.

Floodplain Study FP-034-1995 - 49ers Country Club Lots 315 to 324, McGovern, MacVittie, Lodge & Associates, Inc., 8/15/1995.

Floodplain Study FP-051-2008 - Floodplain Analysis for Tanuri Wash, PCRFCD, 6/2/2008.

Floodplain Study FP-068-2009 - Ventana Canyon Wash and Esperero Wash Technical Data Notebook for Hydrologic and Hydraulic Mapping, JE Fuller Hydrology & Geomorphology, Inc., 9/13/2010.

Erosion Studies

Erosion Study ES-023-2007 - Tanque Verde Creek Management Study, Johnson-Brittain & Associates, July 30, 1993.

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

8.18.1 Data Gathering Needs
• No site specific issues identified.

8.18.2 Frequently Flooded Structures and Properties Subject to Damage
• Tanque Verde Creek breaks-out on the right overbank onto Woodland Road at 13,000-15,000 cfs. There is an ALERT system trigger for this discharge. (T14S R15E Sec. 03)
• Based on modeling, Tanque Verde Creek breaks-out of the main channel at Tanque Verde Loop Road between 14,000-16,000 cfs. (T14S R16E Sec. 06)
• Based on modeling, Tanque Verde Creek breaks-out of the main channel at Houghton Road between 12,000-14,000 cfs. (T14S R15E Sec. 01)
• The south half of 49ers subdivision is subject to overbank flooding from Tanque Verde Creek at around 14,000-16,000 cfs. (T14S R16E Sec. 05)
• 12140 E. Barbary Coast Rd. (205-50-0890) - Repetitive Loss Property, with losses claimed in 1983, 1984 and 2010. (T14S R16E Sec. 05)
• 12150 E. Barbary Coast Rd. (205-50-0900) - Repetitive Loss Property, with losses claimed in 1978, 1983, 1984, 1990 and 2010. (T14S R16E Sec. 05)
• 12530 E Gold Dust Dr. (205-50-0130) - Repetitive Loss Property, with losses claimed in 2006 and 2010. (T14S R16E Sec. 05)

8.18.3 Infrastructure
• Washes within Forty Niners subdivision become filled with sediment and the reduced channel capacity may increase flooding, especially west of the bend in Gold Dust Drive. The washes are public except for one. (T14S R16E Sec. 05)
• An interceptor sewer follows the north bank of Tanque Verde Creek upstream of Sabino. There is no bank protection for this infrastructure. (T13S R15E Sec. 33)

8.18.4 Safety Concerns
• Hazardous conditions exist at the dip crossings of Tanque Verde Creek at Tanque Verde Loop Road (T14S R16E Sec. 06)
• Hazardous conditions exist at the dip crossings of Tanque Verde Creek at Wentworth Road. (T15S R16E Sec. 04)

 

 

Recommendation of Actions and Floodplain Management Strategy

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