Lawson Subwatershed Site 3-1
Lawson Subwatershed Site 3-1 is an earth dam located in Monona County, Iowa, built in 1968. It carries a Low hazard potential classification.
About Lawson Subwatershed Site 3-1
The primary purpose of Lawson Subwatershed Site 3-1 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Monona County Swcd (local government). It impounds the Tr-maple River near Castana.
The dam stands 30 feet tall and stretches 556 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 61 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1968, the structure is well into its service life at over 50 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 | Monona |
| Nearest City | Castana |
| River/Stream | Tr-maple River |
| Coordinates | 42.10830, -95.92770 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 556 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Max Storage | 61 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Monona County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00709 |
| Federal ID | IA00709 |
| More Info | State Dam Safety Program |