Martin
Martin is an earth dam located in Johnson County, Wyoming, built in 1910. It carries a Significant hazard potential classification and has a fair condition assessment.
About Martin
The primary purpose of Martin is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Big Horn Reservoir Company (private). It impounds the Cross Creek near Big Horn.
The dam stands 43 feet tall and stretches 1,200 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 634 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1910, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 08/08/2023.
At 43 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Big Horn |
| River/Stream | Cross Creek |
| Coordinates | 44.54972, -107.20083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 634 acre-ft |
| Max Storage | 634 acre-ft |
| Normal Storage | 561 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 7,837 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BIG HORN RESERVOIR COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/08/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00651 |
| Federal ID | WY00651 |
| More Info | State Dam Safety Program |