Helen is an earth dam located in Converse County, Wyoming, built in 1966. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 22 ft22 ft tall and 400 ft long. 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 Helen
The primary purpose of Helen is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Robinson Ranch Co. (private). It impounds the Little Ltng. Creek,trib Lance near Co. Rd. 43.
The dam stands 22 feet tall and stretches 400 feet across, creates a reservoir covering 7 acres, and has a maximum storage capacity of 83 acre-feet. Completed in 1966, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/04/2023.
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Location
| State | Wyoming |
| County | Converse |
| Nearest City | Co. Rd. 43 |
| River/Stream | Little Ltng. Creek,trib Lance |
| Coordinates | 42.96222, -105.26500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 400 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 7 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Robinson Ranch Co. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/04/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01687 |
| Federal ID | WY01687 |
| More Info | State Dam Safety Program |