Flagler is an earth dam located in Kit Carson County, Colorado, built in 1965. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 41 ft41 ft tall and 1,620 ft long, taller than 87% of U.S. dams with a recorded height. 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 Flagler
The primary purpose of Flagler is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Colorado Parks and Wildlife (state). It impounds the S Fork Republican Rvr near St. Francis, Kansas.
The dam stands 41 feet tall and stretches 1,620 feet across, creates a reservoir covering 157 acres, has a maximum storage capacity of 3,087 acre-feet, and collects water from a drainage area of 137 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 06/17/2023.
At 41 feet, this dam is taller than 87% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Kit Carson |
| Nearest City | St. Francis, Kansas |
| River/Stream | S Fork Republican Rvr |
| Coordinates | 39.29333, -102.98391 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 34 ft |
| Dam Length | 1,620 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 3,087 acre-ft |
| Max Storage | 3,087 acre-ft |
| Normal Storage | 1,360 acre-ft |
| Surface Area | 157 acres |
| Drainage Area | 137 sq mi |
| Max Discharge | 17,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Colorado Parks and Wildlife |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 06/17/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00377 |
| Federal ID | CO00377 |
| More Info | State Dam Safety Program |