Crab Tree Lake Dam
Crab Tree Lake Dam is an earth dam located in Marshall County, Iowa, built in 1948. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Crab Tree Lake Dam
The primary purpose of Crab Tree Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jensen Golf Lc (private). It impounds the Tr-clear Creek near Mingo.
The dam stands 33 feet tall and stretches 1,300 feet across, creates a reservoir covering 42 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1948, the structure is well-established, with more than 75 years of service.
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 08/25/2022.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Iowa |
| County | Marshall |
| Nearest City | Mingo |
| River/Stream | Tr-clear Creek |
| Coordinates | 41.86310, -93.21090 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Normal Storage | 400 acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 2 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | JENSEN GOLF LC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/25/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02038 |
| Federal ID | IA02038 |
| More Info | State Dam Safety Program |