Diamond Lake Watershed Site B-9
Diamond Lake Watershed Site B-9 is an earth dam located in Poweshiek County, Iowa, built in 1972. It carries a Low hazard potential classification.
About Diamond Lake Watershed Site B-9
The primary purpose of Diamond Lake Watershed Site B-9 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Poweshiek County Swcd (local government). It impounds the Tr-moon Creek near Montezuma.
The dam stands 28 feet tall and stretches 412 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 47 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 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. The most recent inspection on record was 10/10/1967. That was over 58 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Poweshiek |
| Nearest City | Montezuma |
| River/Stream | Tr-moon Creek |
| Coordinates | 41.60810, -92.54940 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 412 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 47 acre-ft |
| Max Storage | 47 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Poweshiek County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 10/10/1967 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00968 |
| Federal ID | IA00968 |
| More Info | State Dam Safety Program |