Alfred Urban is an earth dam located in Lyman County, South Dakota, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 1,210 ft long, taller than 50% of U.S. dams with a recorded height. 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 Alfred Urban
The primary purpose of Alfred Urban 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 Alfred Urban (private). It impounds the Cedarcreek Offstream.
The dam stands 25 feet tall and stretches 1,210 feet across, and has a maximum storage capacity of 119 acre-feet. Completed in 1963, 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 | South Dakota |
| County | Lyman |
| Nearest City | None |
| River/Stream | Cedarcreek Offstream |
| Coordinates | 44.08833, -100.04832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 1,210 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 119 acre-ft |
| Max Storage | 119 acre-ft |
| Normal Storage | 98 acre-ft |
| Max Discharge | 2,550 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Alfred Urban |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01146 |
| Federal ID | SD01146 |
| More Info | State Dam Safety Program |