Lyon County Roadgrade Dam 10-98-48 is an earth dam located in Lyon County, Iowa, built in 1988. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 725 ft long, taller than 72% 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 Lyon County Roadgrade Dam 10-98-48
Lyon County Roadgrade Dam 10-98-48 is a dam in Lyon, Iowa. The dam is owned by Lyon County Board of Supervisors (local government). It impounds the Tr- Big Sioux River near Beloit.
The dam stands 31 feet tall and stretches 725 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 35 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1988, the structure is 38 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 | Lyon |
| Nearest City | Beloit |
| River/Stream | Tr- Big Sioux River |
| Coordinates | 43.31770, -96.49290 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 725 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 35 acre-ft |
| Max Storage | 35 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Lyon County Board of Supervisors |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02442 |
| Federal ID | IA02442 |
| More Info | State Dam Safety Program |