Black Hawk Marsh Dam
Black Hawk Marsh Dam is an earth dam located in Sac County, Iowa, built in 1994. It carries a Low hazard potential classification.
About Black Hawk Marsh Dam
The primary purpose of Black Hawk Marsh 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 Carnavon Creek Drainage near Black Hawk Lake.
The dam stands 8 feet tall and stretches 8,150 feet across, creates a reservoir covering 214 acres, has a maximum storage capacity of 1,200 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1994, the structure is 32 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Sac |
| Nearest City | Black Hawk Lake |
| River/Stream | Carnavon Creek Drainage |
| Coordinates | 42.27450, -95.04570 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 8,150 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 1,200 acre-ft |
| Max Storage | 1,200 acre-ft |
| Normal Storage | 642 acre-ft |
| Surface Area | 214 acres |
| Drainage Area | 12 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03090 |
| Federal ID | IA03090 |
| More Info | State Dam Safety Program |