Peterson Lake is an earth dam located in Boulder County, Colorado, built in 1961. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 12 ft12 ft tall and 88 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 Peterson Lake
The primary purpose of Peterson Lake is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Eldora Enterprises, LLC (newquist, Randy) (private). It impounds the Middle Boulder Creek-tr near Nederland.
The dam stands 12 feet tall and stretches 88 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 197 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1961, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/13/2008. That was over 18 years ago.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Nederland |
| River/Stream | Middle Boulder Creek-tr |
| Coordinates | 39.94048, -105.56768 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 88 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 197 acre-ft |
| Max Storage | 197 acre-ft |
| Normal Storage | 117 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 345 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Eldora Enterprises, LLC (newquist, Randy) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/13/2008 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO02834 |
| Federal ID | CO02834 |
| More Info | State Dam Safety Program |