Park Lake Dam
Park Lake Dam is an earth dam located in Jefferson County, Montana, built in 1872. It carries a High hazard potential classification.
About Park Lake Dam
The primary purpose of Park Lake Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the Prickly Pear Cr, Tributary Of near Montana City,mt.
The dam stands 31 feet tall and stretches 394 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 729 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1872, the structure is one of the older dams in the region, with over a century and a half of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 09/30/2020.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Montana dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Jefferson |
| Nearest City | Montana City,mt |
| River/Stream | Prickly Pear Cr, Tributary Of |
| Coordinates | 46.44418, -112.17205 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 394 ft |
| Year Completed | 1872 (154 years old) |
Storage & Hydraulics
| NID Storage | 729 acre-ft |
| Max Storage | 729 acre-ft |
| Normal Storage | 389 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 4,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | USDA FS |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 09/30/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT03842 |
| Federal ID | MT03842 |
| More Info | State Dam Safety Program |