Plotz Dam
Plotz Dam is an earth dam located in Johnson County, Iowa, built in 1968. It carries a Low hazard potential classification.
About Plotz Dam
The primary purpose of Plotz Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Martin Plotz (private). It impounds the Tr-knapp Creek near Coralville Reservoir.
The dam stands 28 feet tall and stretches 287 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 44 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 | Johnson |
| Nearest City | Coralville Reservoir |
| River/Stream | Tr-knapp Creek |
| Coordinates | 41.82820, -91.79860 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 287 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 44 acre-ft |
| Max Storage | 44 acre-ft |
| Normal Storage | 22 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Martin Plotz |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01328 |
| Federal ID | IA01328 |
| More Info | State Dam Safety Program |