Arco Dam is an earth dam located in Dickinson County, Iowa, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 511 ft long, taller than 65% 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 Arco Dam
The primary purpose of Arco Dam 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 Arco Dehydrating Co (private). It impounds the Tr-west Branch Little Sioux near Silver Lake.
The dam stands 29 feet tall and stretches 511 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 233 acre-feet, and collects water from a drainage area of 1 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 | Dickinson |
| Nearest City | Silver Lake |
| River/Stream | Tr-west Branch Little Sioux |
| Coordinates | 43.43850, -95.37190 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 511 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 233 acre-ft |
| Max Storage | 233 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Arco Dehydrating Co |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00363 |
| Federal ID | IA00363 |
| More Info | State Dam Safety Program |