Duvall #1 is an earth dam located in Mesa County, Colorado, built in 1947. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 29 ft29 ft tall and 950 ft long, taller than 65% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Duvall #1
The primary purpose of Duvall #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ridgley, Shawn (private). It impounds the Little Dolores-tr near Dewey, Utah.
The dam stands 29 feet tall and stretches 950 feet across, creates a reservoir covering 15 acres, and has a maximum storage capacity of 177 acre-feet. Completed in 1947, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 04/21/2021.
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Location
| State | Colorado |
| County | Mesa |
| Nearest City | Dewey, Utah |
| River/Stream | Little Dolores-tr |
| Coordinates | 38.90167, -108.77723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 950 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 177 acre-ft |
| Max Storage | 177 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 15 acres |
| Max Discharge | 1,380 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Ridgley, Shawn |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/21/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00869 |
| Federal ID | CO00869 |
| More Info | State Dam Safety Program |