Clark No. 1
Clark No. 1 is an earth dam located in Niobrara County, Wyoming, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
About Clark No. 1
The primary purpose of Clark 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 Jack Pfister Ranch (private). It impounds the Clark Draw near Edgemont S D.
The dam stands 27 feet tall and stretches 445 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 77 acre-feet. Completed in 1956, 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 06/26/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Niobrara |
| Nearest City | Edgemont S D |
| River/Stream | Clark Draw |
| Coordinates | 43.22083, -104.26361 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 445 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Normal Storage | 47 acre-ft |
| Surface Area | 5 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | JACK PFISTER RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/26/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00517 |
| Federal ID | WY00517 |
| More Info | State Dam Safety Program |