Southfork Dam
Southfork Dam is an earth dam located in Dallas County, Iowa, built in 1988. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Southfork Dam
Southfork Dam is a dam in Dallas, Iowa. The dam is owned by Southfork Lake Lot Owners Assn (private). It impounds the Tr- Walnut Cr. near Clive.
The dam stands 38 feet tall and stretches 560 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 204 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1988, the structure is 38 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 04/11/2023.
At 38 feet, this dam is taller than 85% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Iowa dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Dallas |
| Nearest City | Clive |
| River/Stream | Tr- Walnut Cr. |
| Coordinates | 41.60520, -93.82050 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 560 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 204 acre-ft |
| Max Storage | 204 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Southfork Lake Lot Owners Assn |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/11/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IA02411 |
| Federal ID | IA02411 |
| More Info | State Dam Safety Program |