Porter Dam
Porter Dam is an earth dam located in Polk County, Iowa, built in 1955. It carries a Low hazard potential classification.
About Porter Dam
The primary purpose of Porter Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by David Porter (private). It impounds the Tr-east Fourmile Cr. near Altoona.
The dam stands 25 feet tall and stretches 150 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 51 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1955, 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 | Polk |
| Nearest City | Altoona |
| River/Stream | Tr-east Fourmile Cr. |
| Coordinates | 41.65040, -93.47370 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 150 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | David Porter |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02281 |
| Federal ID | IA02281 |
| More Info | State Dam Safety Program |