Copeland is an earth dam located in Boulder County, Colorado, built in 1934. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 24 ft24 ft tall and 225 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 Copeland
The primary purpose of Copeland 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 St.vrain & Left Hand Water Conservancy Dist. (sean (local government). It impounds the North St. Vrain Creek-os near Lyons.
The dam stands 24 feet tall and stretches 225 feet across, creates a reservoir covering 7 acres, and has a maximum storage capacity of 117 acre-feet. Completed in 1934, the structure is well-established, with more than 75 years of service.
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 09/16/2021.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Lyons |
| River/Stream | North St. Vrain Creek-os |
| Coordinates | 40.21834, -105.53612 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 225 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 117 acre-ft |
| Max Storage | 117 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 7 acres |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | St.vrain & Left Hand Water Conservancy Dist. (sean |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/16/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01204 |
| Federal ID | CO01204 |
| More Info | State Dam Safety Program |