Twin No. 1
Twin No. 1 is an earth dam located in Johnson County, Wyoming, built in 1957. It carries a Low hazard potential classification and has a poor condition assessment.
About Twin No. 1
The primary purpose of Twin No. 1 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 Betz Ranch Llc (private). It impounds the Betz Draw near Clearmont.
The dam stands 47 feet tall and stretches 225 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 60 acre-feet. Completed in 1957, 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 04/21/2022.
At 47 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Clearmont |
| River/Stream | Betz Draw |
| Coordinates | 44.51280, -106.38190 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 47 ft |
| Dam Length | 225 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 3 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | BETZ RANCH LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/21/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00497 |
| Federal ID | WY00497 |
| More Info | State Dam Safety Program |