Lake Colchester Dam
Lake Colchester Dam is an earth dam located in Warren County, Iowa, built in 1965. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lake Colchester Dam
Lake Colchester Dam is a dam in Warren, Iowa. The dam is owned by Lakewood Village Association (private). It impounds the Middle Creek near Norwalk.
The dam stands 31 feet tall and stretches 1,220 feet across, creates a reservoir covering 170 acres, has a maximum storage capacity of 3,800 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 10/10/2023.
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Location
| State | Iowa |
| County | Warren |
| Nearest City | Norwalk |
| River/Stream | Middle Creek |
| Coordinates | 41.50690, -93.67760 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 1,220 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 3,800 acre-ft |
| Max Storage | 3,800 acre-ft |
| Normal Storage | 1,700 acre-ft |
| Surface Area | 170 acres |
| Drainage Area | 10 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Lakewood Village Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/10/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01132 |
| Federal ID | IA01132 |
| More Info | State Dam Safety Program |