Fairport
Fairport is an earth dam located in Larimer County, Colorado, built in 1882. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Fairport
The primary purpose of Fairport is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by City Of Fort Collins-natural Areas Dept. (ryan Kog (local government). It impounds the Big Thompson River-os near Ft. Collins.
The dam stands 13 feet tall and stretches 640 feet across, creates a reservoir covering 52 acres, and has a maximum storage capacity of 390 acre-feet. Completed in 1882, 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 11/10/2022.
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Location
| State | Colorado |
| County | Larimer |
| Nearest City | Ft. Collins |
| River/Stream | Big Thompson River-os |
| Coordinates | 40.48547, -105.06840 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 12 ft |
| Dam Length | 640 ft |
| Year Completed | 1882 (144 years old) |
Storage & Hydraulics
| NID Storage | 390 acre-ft |
| Max Storage | 390 acre-ft |
| Normal Storage | 143 acre-ft |
| Surface Area | 52 acres |
| Max Discharge | 3,945 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CITY OF FORT COLLINS-NATURAL AREAS DEPT. (RYAN KOG |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/10/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01183 |
| Federal ID | CO01183 |
| More Info | State Dam Safety Program |