O Bar O No. 3
O Bar O No. 3 is an earth dam located in Platte County, Wyoming, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
About O Bar O No. 3
The primary purpose of O Bar O No. 3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by True Ranches, Llc (private). It impounds the Grays Run, Sybille Crk Offstrm near Torrington.
The dam stands 33 feet tall and stretches 360 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 182 acre-feet. Completed in 1970, 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 04/17/2023.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Wyoming |
| County | Platte |
| Nearest City | Torrington |
| River/Stream | Grays Run, Sybille Crk Offstrm |
| Coordinates | 42.07611, -105.07333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 360 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 182 acre-ft |
| Max Storage | 182 acre-ft |
| Normal Storage | 117 acre-ft |
| Surface Area | 11 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | TRUE RANCHES, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/17/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00073 |
| Federal ID | WY00073 |
| More Info | State Dam Safety Program |