Holiday Lake Dam
Holiday Lake Dam is an earth dam located in Poweshiek County, Iowa, built in 1962. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Holiday Lake Dam
The primary purpose of Holiday Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Holiday Lake Owners Association Incorporated (private). It impounds the Tr-walnut Creek near Marengo.
The dam stands 50 feet tall and stretches 1,205 feet across, creates a reservoir covering 96 acres, has a maximum storage capacity of 2,100 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1962, 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 06/18/2021.
At 50 feet, this dam is taller than 93% of dams nationwide.
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 | Marengo |
| River/Stream | Tr-walnut Creek |
| Coordinates | 41.82130, -92.44590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 1,205 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 2,100 acre-ft |
| Max Storage | 2,100 acre-ft |
| Normal Storage | 1,430 acre-ft |
| Surface Area | 96 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Holiday Lake Owners Association Incorporated |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/18/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00971 |
| Federal ID | IA00971 |
| More Info | State Dam Safety Program |