Iberlin
Iberlin is an earth dam located in Johnson County, Wyoming, built in 1951. It carries a Low hazard potential classification and has a poor condition assessment.
About Iberlin
The primary purpose of Iberlin is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Iberlin Four Mile, Llc (private). It impounds the S Fork Four Mile Creek near Arvada.
The dam stands 30 feet tall and stretches 330 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 169 acre-feet. Completed in 1951, 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 05/18/2021.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Arvada |
| River/Stream | S Fork Four Mile Creek |
| Coordinates | 44.03450, -106.32250 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 330 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 169 acre-ft |
| Max Storage | 169 acre-ft |
| Normal Storage | 92 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | IBERLIN FOUR MILE, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/18/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00505 |
| Federal ID | WY00505 |
| More Info | State Dam Safety Program |