Mary Stead
Mary Stead is an earth dam located in Natrona County, Wyoming, built in 1909. It carries a Low hazard potential classification and has a fair condition assessment.
About Mary Stead
The primary purpose of Mary Stead is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Kro Ventures - Karen Overton (private). It impounds the Goose Creek Offstream near Big Muddy Oil Field.
The dam stands 14 feet tall and stretches 710 feet across, creates a reservoir covering 25 acres, and has a maximum storage capacity of 302 acre-feet. Completed in 1909, the structure is over a century 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 09/06/2023.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Big Muddy Oil Field |
| River/Stream | Goose Creek Offstream |
| Coordinates | 42.82528, -106.14556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 710 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 302 acre-ft |
| Max Storage | 302 acre-ft |
| Normal Storage | 210 acre-ft |
| Surface Area | 25 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | KRO VENTURES - KAREN OVERTON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/06/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00215 |
| Federal ID | WY00215 |
| More Info | State Dam Safety Program |