Lon Hagler
Lon Hagler is an earth dam located in Larimer County, Colorado, built in 1967. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lon Hagler
The primary purpose of Lon Hagler is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Consolidated Home Supply Ditch & Res. Co (dave Sch (private). It impounds the Big Thompson River-os near Loveland.
The dam stands 71 feet tall and stretches 5,085 feet across, creates a reservoir covering 201 acres, and has a maximum storage capacity of 6,275 acre-feet. Completed in 1967, 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 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 07/11/2022.
At 71 feet, this dam is taller than 96% of all dams in the United States.
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 | Larimer |
| Nearest City | Loveland |
| River/Stream | Big Thompson River-os |
| Coordinates | 40.36688, -105.14300 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 71 ft |
| Dam Height | 60 ft |
| Dam Length | 5,085 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 6,275 acre-ft |
| Max Storage | 6,275 acre-ft |
| Normal Storage | 5,228 acre-ft |
| Surface Area | 201 acres |
| Max Discharge | 920 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CONSOLIDATED HOME SUPPLY DITCH & RES. CO (DAVE SCH |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/11/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00165 |
| Federal ID | CO00165 |
| More Info | State Dam Safety Program |