S 2nd Street Stormwater Detention Basin is an earth dam located in Marshall County, Iowa, built in 1997. It carries a Low hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 1,050 ft long. 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 S 2nd Street Stormwater Detention Basin
The primary purpose of S 2nd Street Stormwater Detention Basin is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City of Marshalltown (local government). It impounds the Anson Creek near Marshalltown.
The dam stands 11 feet tall and stretches 1,050 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 136 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1997, the structure is 29 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.
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Location
| State | Iowa |
| County | Marshall |
| Nearest City | Marshalltown |
| River/Stream | Anson Creek |
| Coordinates | 42.01220, -92.91510 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1997 (29 years old) |
Storage & Hydraulics
| NID Storage | 136 acre-ft |
| Max Storage | 136 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Marshalltown |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03143 |
| Federal ID | IA03143 |
| More Info | State Dam Safety Program |