Underdal #1
Underdal #1 is an earth dam located in Toole County, Montana, built in 1963. It carries a Low hazard potential classification.
About Underdal #1
The primary purpose of Underdal #1 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ted R Underdal (private). It impounds the Timber Coulee near Loma.
The dam stands 19 feet tall and stretches 400 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 84 acre-feet. Completed in 1963, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Toole |
| Nearest City | Loma |
| River/Stream | Timber Coulee |
| Coordinates | 48.28230, -111.29330 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 400 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 84 acre-ft |
| Max Storage | 84 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 14 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | TED R UNDERDAL |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00420 |
| Federal ID | MT00420 |
| More Info | State Dam Safety Program |