Davis No. 1
Davis No. 1 is an earth dam located in Boulder County, Colorado, built in 1910. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Davis No. 1
The primary purpose of Davis No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Boulder & Lefthand Irrigation Company (juhl, Bob) (private). It impounds the Dry Creek-os near Boulder.
The dam stands 13 feet tall and stretches 3,263 feet across, creates a reservoir covering 17 acres, and has a maximum storage capacity of 189 acre-feet. Completed in 1910, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/22/2022.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Boulder |
| Nearest City | Boulder |
| River/Stream | Dry Creek-os |
| Coordinates | 40.06358, -105.19814 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 10 ft |
| Dam Length | 3,263 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 189 acre-ft |
| Max Storage | 189 acre-ft |
| Normal Storage | 138 acre-ft |
| Surface Area | 17 acres |
| Max Discharge | 84 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BOULDER & LEFTHAND IRRIGATION COMPANY (JUHL, BOB) |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/22/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01221 |
| Federal ID | CO01221 |
| More Info | State Dam Safety Program |