Mark Maeder Dam is an earth dam located in Adair County, Iowa, built in 2020. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 320 ft long, taller than 78% of U.S. dams with a recorded height. 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 Mark Maeder Dam
The primary purpose of Mark Maeder Dam is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Mark Maeder (private). It impounds the Bush Branch Middle River near Winterset.
The dam stands 34 feet tall and stretches 320 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 31 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2020, the structure is relatively new.
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.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Iowa |
| County | Adair |
| Nearest City | Winterset |
| River/Stream | Bush Branch Middle River |
| Coordinates | 41.28590, -94.24960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 320 ft |
| Year Completed | 2020 (6 years old) |
Storage & Hydraulics
| NID Storage | 31 acre-ft |
| Max Storage | 31 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 135 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Mark Maeder |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04383 |
| Federal ID | IA04383 |
| More Info | State Dam Safety Program |