Hickory Grove Lake Dam is an earth dam located in Story County, Iowa, built in 1966. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 56 ft56 ft tall and 745 ft long, taller than 94% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Hickory Grove Lake Dam
The primary purpose of Hickory Grove Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Story County Conservation Board (local government). It impounds the Tr-east Indian Creek near Maxwell.
The dam stands 56 feet tall and stretches 745 feet across, creates a reservoir covering 107 acres, has a maximum storage capacity of 3,410 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1966, 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 06/05/2020.
At 56 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Iowa |
| County | Story |
| Nearest City | Maxwell |
| River/Stream | Tr-east Indian Creek |
| Coordinates | 41.99120, -93.36410 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 56 ft |
| Dam Height | 56 ft |
| Dam Length | 745 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 3,410 acre-ft |
| Max Storage | 3,410 acre-ft |
| Normal Storage | 2,141 acre-ft |
| Surface Area | 107 acres |
| Drainage Area | 6 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Story County Conservation Board |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/05/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01019 |
| Federal ID | IA01019 |
| More Info | State Dam Safety Program |