Petro No. 1 Dam is a gravity dam located in Natrona County, Wyoming, built in 1999. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 27 ft27 ft tall and 314 ft long, taller than 59% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Petro No. 1 Dam
Petro No. 1 Dam is a dam in Natrona, Wyoming. The dam is owned by Doi BLM (federal). It impounds the Unamed Draw near Midwest.
The dam stands 27 feet tall and stretches 314 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 57 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1999, the structure is 27 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 07/23/2017.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Midwest |
| River/Stream | Unamed Draw |
| Coordinates | 43.33966, -106.29074 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 27 ft |
| Dam Length | 314 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 64 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/23/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02344 |
| Federal ID | WY02344 |
| More Info | State Dam Safety Program |