Glen Loch is a gravity dam located in Chippewa County, Wisconsin, built in 1875. It carries a High hazard potential classification.
Dam profile
NID height · 37 ft37 ft tall and 149 ft long, taller than 83% 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 concrete gravity section and the water level is illustrative.
About Glen Loch
The primary purpose of Glen Loch is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Chippewa Falls (local government). It impounds the Duncan Creek near Chippewa Falls.
The dam stands 37 feet tall and stretches 149 feet across, creates a reservoir covering 45 acres, has a maximum storage capacity of 1,000 acre-feet, and collects water from a drainage area of 110 square miles. Completed in 1875, 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 10/26/2020.
At 37 feet, this dam is taller than 83% of dams nationwide.
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 Wisconsin 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 | Wisconsin |
| County | Chippewa |
| Nearest City | Chippewa Falls |
| River/Stream | Duncan Creek |
| Coordinates | 44.95692, -91.39976 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 37 ft |
| Dam Height | 37 ft |
| Dam Length | 149 ft |
| Year Completed | 1875 (151 years old) |
Storage & Hydraulics
| NID Storage | 1,000 acre-ft |
| Max Storage | 1,000 acre-ft |
| Normal Storage | 700 acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 110 sq mi |
| Max Discharge | 6,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Chippewa Falls |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Last Inspection | 10/26/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00034 |
| Federal ID | WI00034 |
| More Info | State Dam Safety Program |