Pomona Lake No. 1 is an earth dam located in Jefferson County, Colorado, built in 1902. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 1,150 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 Pomona Lake No. 1
The primary purpose of Pomona 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 The Pond Homeowners Assoc. (tammy Hall) (private). It impounds the Little Dry Creek-os near Arvada.
The dam stands 9 feet tall and stretches 1,150 feet across, creates a reservoir covering 36 acres, and has a maximum storage capacity of 255 acre-feet. Completed in 1902, 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 06/24/2009. That was over 17 years ago.
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Location
| State | Colorado |
| County | Jefferson |
| Nearest City | Arvada |
| River/Stream | Little Dry Creek-os |
| Coordinates | 39.85144, -105.10283 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 6 ft |
| Dam Length | 1,150 ft |
| Year Completed | 1902 (124 years old) |
Storage & Hydraulics
| NID Storage | 255 acre-ft |
| Max Storage | 255 acre-ft |
| Normal Storage | 165 acre-ft |
| Surface Area | 36 acres |
| Max Discharge | 210 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | The Pond Homeowners Assoc. (tammy Hall) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/24/2009 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01328 |
| Federal ID | CO01328 |
| More Info | State Dam Safety Program |