Diamond Lake Watershed Site C-14
Diamond Lake Watershed Site C-14 is an earth dam located in Poweshiek County, Iowa, built in 1972. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Diamond Lake Watershed Site C-14
The primary purpose of Diamond Lake Watershed Site C-14 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Poweshiek County Swcd (local government). It impounds the Tr-moon Creek near Montezuma.
The dam stands 29 feet tall and stretches 638 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 115 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, 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 09/09/2022.
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Location
| State | Iowa |
| County | Poweshiek |
| Nearest City | Montezuma |
| River/Stream | Tr-moon Creek |
| Coordinates | 41.59560, -92.53480 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 638 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 115 acre-ft |
| Max Storage | 115 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Poweshiek County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/09/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00963 |
| Federal ID | IA00963 |
| More Info | State Dam Safety Program |