Grell Pond Dam is an earth dam located in Ida County, Iowa, built in 1958. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 387 ft long, taller than 55% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Grell Pond Dam
The primary purpose of Grell Pond 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 Fred C Grell (private). It impounds the Tr-maple River near County Fairgrounds.
The dam stands 26 feet tall and stretches 387 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 109 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1958, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 11/03/2015. That was over 10 years ago.
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Location
| State | Iowa |
| County | Ida |
| Nearest City | County Fairgrounds |
| River/Stream | Tr-maple River |
| Coordinates | 42.37220, -95.50210 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 387 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 109 acre-ft |
| Max Storage | 109 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Fred C Grell |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/03/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00514 |
| Federal ID | IA00514 |
| More Info | State Dam Safety Program |