Chapman Dam is a gravity dam located in Valley County, Montana, built in 2003. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 793 ft long. 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 Chapman Dam
Chapman Dam is a dam in Valley, Montana. The dam is owned by Doi BLM (federal).
The dam stands 14 feet tall and stretches 793 feet across, creates a reservoir covering 18 acres, and has a maximum storage capacity of 54 acre-feet. Completed in 2003, the structure is relatively new.
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 07/23/2020.
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Location
| State | Montana |
| County | Valley |
| Coordinates | 48.26820, -106.74247 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 14 ft |
| Dam Length | 793 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Surface Area | 18 acres |
Ownership & Safety
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/23/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03890 |
| Federal ID | MT03890 |
| More Info | State Dam Safety Program |