Waterloo Milldam
Waterloo Milldam is a gravity dam located in Black Hawk County, Iowa, built in 1915. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Waterloo Milldam
Waterloo Milldam is a dam in Black Hawk, Iowa. The dam is owned by City Of Waterloo (local government). It impounds the Cedar River near Waterloo.
The dam stands 7 feet tall and stretches 546 feet across, creates a reservoir covering 250 acres, has a maximum storage capacity of 882 acre-feet, and collects water from a drainage area of 5,146 square miles. Completed in 1915, the structure is over a century 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/22/2024.
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Location
| State | Iowa |
| County | Black Hawk |
| Nearest City | Waterloo |
| River/Stream | Cedar River |
| Coordinates | 42.49710, -92.33830 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 546 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 882 acre-ft |
| Max Storage | 882 acre-ft |
| Normal Storage | 882 acre-ft |
| Surface Area | 250 acres |
| Drainage Area | 5,146 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | City of Waterloo |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/22/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01320 |
| Federal ID | IA01320 |
| More Info | State Dam Safety Program |