Cattail #1 is an earth dam located in Larimer County, Colorado, built in 1966. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 22 ft22 ft tall and 1,172 ft long. 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 Cattail #1
The primary purpose of Cattail #1 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 Glen Development, LLC (scott Bray) (private). It impounds the Big Thompson River-tr near Loveland.
The dam stands 22 feet tall and stretches 1,172 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 91 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
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 10/23/2001. That was over 24 years ago.
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Location
| State | Colorado |
| County | Larimer |
| Nearest City | Loveland |
| River/Stream | Big Thompson River-tr |
| Coordinates | 40.38168, -105.11834 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 10 ft |
| Dam Length | 1,172 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 91 acre-ft |
| Max Storage | 91 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 5,733 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Glen Development, LLC (scott Bray) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/23/2001 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00160 |
| Federal ID | CO00160 |
| More Info | State Dam Safety Program |