Helena Valley Dike
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Lewis and Clark |
| Nearest City | HELENA |
| Coordinates | 46.63790, -111.88290 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 890 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 10,702 acre-ft |
| Max Storage | 10,702 acre-ft |
| Normal Storage | 10,451 acre-ft |
| Surface Area | 531 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BUREAU OF RECLAMATION |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 07/28/2020 |
| Emergency Action Plan | Yes |