Mason1 Dam is an earth dam located in Madison County, Iowa, built in 2004. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall. 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 Mason1 Dam
Mason1 Dam is a dam in Madison, Iowa. The dam is owned by Ronald E Mason (private). It impounds the Tr- North Branch near Norwalk.
The dam stands 24 feet tall, creates a reservoir covering 23 acres, has a maximum storage capacity of 289 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2004, 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. The most recent inspection on record was 06/23/2006. That was over 20 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Madison |
| Nearest City | Norwalk |
| River/Stream | Tr- North Branch |
| Coordinates | 41.45960, -94.07130 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Year Completed | 2004 (22 years old) |
Storage & Hydraulics
| NID Storage | 289 acre-ft |
| Max Storage | 289 acre-ft |
| Normal Storage | 163 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Ronald E Mason |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/23/2006 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03521 |
| Federal ID | IA03521 |
| More Info | State Dam Safety Program |