Lewis Dam #1 Pd
Lewis Dam #1 Pd is a gravity dam located in Petroleum County, Montana. It carries a Low hazard potential classification.
About Lewis Dam #1 Pd
Lewis Dam #1 Pd is a dam in Petroleum, Montana. The dam is owned by Doi Blm (federal). It impounds the Intermittent.
The dam stands 26 feet tall and stretches 2,900 feet across, creates a reservoir covering 133 acres, has a maximum storage capacity of 680 acre-feet, and collects water from a drainage area of 2 square miles.
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. The most recent inspection on record was 11/06/2019.
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Location
| State | Montana |
| County | Petroleum |
| River/Stream | Intermittent |
| Coordinates | 47.13255, -108.70810 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 26 ft |
| Dam Length | 2,900 ft |
Storage & Hydraulics
| NID Storage | 680 acre-ft |
| Max Storage | 680 acre-ft |
| Surface Area | 133 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 11/06/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02176 |
| Federal ID | MT02176 |
| More Info | State Dam Safety Program |