Steamboat Rock Dam is a gravity dam located in Hardin County, Iowa, built in 1930. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 210 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Steamboat Rock Dam
The primary purpose of Steamboat Rock Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Iowa Department of Natural Resources (state). It impounds the Iowa River near Steamboat Rock.
The dam stands 12 feet tall and stretches 210 feet across, creates a reservoir covering 60 acres, has a maximum storage capacity of 355 acre-feet, and collects water from a drainage area of 730 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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.
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Location
| State | Iowa |
| County | Hardin |
| Nearest City | Steamboat Rock |
| River/Stream | Iowa River |
| Coordinates | 42.40840, -93.07260 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 210 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 355 acre-ft |
| Max Storage | 355 acre-ft |
| Normal Storage | 355 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 730 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03061 |
| Federal ID | IA03061 |
| More Info | State Dam Safety Program |