Floodwater Ret. B-5
Floodwater Ret. B-5 is an earth dam located in Larimer County, Colorado, built in 1977. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Floodwater Ret. B-5
The primary purpose of Floodwater Ret. B-5 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by North Poudre Irr. Co. (moen, Tad) (private). It impounds the South Branch Boxelder Cr near Wellington.
The dam stands 91 feet tall and stretches 1,137 feet across, creates a reservoir covering 77 acres, has a maximum storage capacity of 2,502 acre-feet, and collects water from a drainage area of 18 square miles. Completed in 1977, the structure is 49 years 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 10/06/2022.
At 91 feet, this dam is taller than 98% of all dams in the United States.
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Location
| State | Colorado |
| County | Larimer |
| Nearest City | Wellington |
| River/Stream | South Branch Boxelder Cr |
| Coordinates | 40.93793, -105.18539 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 91 ft |
| Dam Height | 80 ft |
| Dam Length | 1,137 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 2,502 acre-ft |
| Max Storage | 2,502 acre-ft |
| Normal Storage | 1,578 acre-ft |
| Surface Area | 77 acres |
| Drainage Area | 18 sq mi |
| Max Discharge | 14,807 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | NORTH POUDRE IRR. CO. (MOEN, TAD) |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/06/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00551 |
| Federal ID | CO00551 |
| More Info | State Dam Safety Program |