Groenedyk Dam
Groenedyk Dam is an earth dam located in Mahaska County, Iowa, built in 1974. It carries a Low hazard potential classification.
About Groenedyk Dam
The primary purpose of Groenedyk Dam 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 Cornie Groenedyk (private). It impounds the Tr-south Skunk River near Lake Keomah.
The dam stands 30 feet tall and stretches 330 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 36 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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 11/02/1967. That was over 58 years ago.
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Location
| State | Iowa |
| County | Mahaska |
| Nearest City | Lake Keomah |
| River/Stream | Tr-south Skunk River |
| Coordinates | 41.27450, -92.53420 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 330 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 36 acre-ft |
| Max Storage | 36 acre-ft |
| Normal Storage | 22 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Cornie Groenedyk |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 11/02/1967 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00641 |
| Federal ID | IA00641 |
| More Info | State Dam Safety Program |