Hanson Pond is an earth dam located in Brown County, South Dakota, built in 1910. It carries a Significant hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 1,650 ft long. 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 Hanson Pond
The primary purpose of Hanson Pond is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bnsf Railroad (private). It impounds the Snake Creek-tr.
The dam stands 15 feet tall and stretches 1,650 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 228 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1910, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | South Dakota |
| County | Brown |
| River/Stream | Snake Creek-tr |
| Coordinates | 45.45007, -98.57846 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 1,650 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 228 acre-ft |
| Max Storage | 228 acre-ft |
| Normal Storage | 150 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 16 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bnsf Railroad |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | SD02692 |
| Federal ID | SD02692 |
| More Info | State Dam Safety Program |