Panama No. 1 - South
Panama No. 1 - South is an earth dam located in Boulder County, Colorado, built in 1904. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Panama No. 1 - South
The primary purpose of Panama No. 1 - South is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Boulder & White Rock Ditch & Reservoir Co. (grant, (private). It impounds the Boulder Creek-os near Frederick.
The dam stands 16 feet tall and stretches 1,200 feet across, creates a reservoir covering 370 acres, has a maximum storage capacity of 6,979 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1904, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. 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 08/10/2022.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Frederick |
| River/Stream | Boulder Creek-os |
| Coordinates | 40.08951, -105.08167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 6,979 acre-ft |
| Max Storage | 6,979 acre-ft |
| Normal Storage | 4,691 acre-ft |
| Surface Area | 370 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BOULDER & WHITE ROCK DITCH & RESERVOIR CO. (GRANT, |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/10/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02821 |
| Federal ID | CO02821 |
| More Info | State Dam Safety Program |