Ding Dong is an earth dam located in Carter County, Montana, built in 1955. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 3,960 ft long, taller than 68% 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 embankment section and the water level is illustrative.
About Ding Dong
The primary purpose of Ding Dong is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by U.s. D.o.i. B.l.m. (federal). It impounds the Tr- Cabin Creek near Capitol.
The dam stands 30 feet tall and stretches 3,960 feet across, and has a maximum storage capacity of 250 acre-feet. Completed in 1955, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Montana |
| County | Carter |
| Nearest City | Capitol |
| River/Stream | Tr- Cabin Creek |
| Coordinates | 45.56271, -104.51129 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 3,960 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 163 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | U.s. D.o.i. B.l.m. |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03055 |
| Federal ID | MT03055 |
| More Info | State Dam Safety Program |