Lyle is an earth dam located in Johnson County, Wyoming, built in 1953. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 765 ft long, taller than 83% 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 Lyle
The primary purpose of Lyle is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ramsbottom Ranch (private). It impounds the S Fork Crazy Woman near Arvada.
The dam stands 37 feet tall and stretches 765 feet across, creates a reservoir covering 12 acres, and has a maximum storage capacity of 185 acre-feet. Completed in 1953, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/07/2023.
At 37 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Arvada |
| River/Stream | S Fork Crazy Woman |
| Coordinates | 43.92472, -106.77389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 765 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 185 acre-ft |
| Max Storage | 185 acre-ft |
| Normal Storage | 112 acre-ft |
| Surface Area | 12 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Ramsbottom Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 06/07/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00781 |
| Federal ID | WY00781 |
| More Info | State Dam Safety Program |