Twin Lakes Reservoir
Twin Lakes Reservoir is an earth dam located in Larimer County, Colorado, built in 1998. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Twin Lakes Reservoir
The primary purpose of Twin Lakes Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Greeley Dept. Of Water Resources (gustafso (local government). It impounds the S Fork Cache La Poudre-tr near Fort Collins.
The dam stands 41 feet tall and stretches 245 feet across, creates a reservoir covering 25 acres, and has a maximum storage capacity of 419 acre-feet. Completed in 1998, the structure is 28 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 07/27/2021.
At 41 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Colorado |
| County | Larimer |
| Nearest City | Fort Collins |
| River/Stream | S Fork Cache La Poudre-tr |
| Coordinates | 40.56287, -105.57699 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 35 ft |
| Dam Length | 245 ft |
| Year Completed | 1998 (28 years old) |
Storage & Hydraulics
| NID Storage | 419 acre-ft |
| Max Storage | 419 acre-ft |
| Normal Storage | 278 acre-ft |
| Surface Area | 25 acres |
| Max Discharge | 3,560 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF GREELEY DEPT. OF WATER RESOURCES (GUSTAFSO |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/27/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02022 |
| Federal ID | CO02022 |
| More Info | State Dam Safety Program |