Oberon Lake No. 1 is an earth dam located in Jefferson County, Colorado, built in 1887. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 600 ft long, taller than 62% 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 Oberon Lake No. 1
The primary purpose of Oberon Lake No. 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City of Arvada (essert, Wendy) (local government). It impounds the Ralston Creek-os near Arvada.
The dam stands 28 feet tall and stretches 600 feet across, creates a reservoir covering 3 acres, and has a maximum storage capacity of 69 acre-feet. Completed in 1887, the structure is over a century 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. The most recent inspection on record was 10/09/2012. That was over 14 years ago.
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Location
| State | Colorado |
| County | Jefferson |
| Nearest City | Arvada |
| River/Stream | Ralston Creek-os |
| Coordinates | 39.81978, -105.10463 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 20 ft |
| Dam Length | 600 ft |
| Year Completed | 1887 (139 years old) |
Storage & Hydraulics
| NID Storage | 69 acre-ft |
| Max Storage | 69 acre-ft |
| Normal Storage | 6 acre-ft |
| Surface Area | 3 acres |
| Max Discharge | 203 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Arvada (essert, Wendy) |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/09/2012 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01787 |
| Federal ID | CO01787 |
| More Info | State Dam Safety Program |