West Lake is an earth dam located in Boulder County, Colorado, built in 2020. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 340 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 West Lake
The primary purpose of West Lake is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Boulder County Parks and Open Space (alexander, Ro (local government). It impounds the St Vrain near Hygiene.
The dam stands 10 feet tall and stretches 340 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 239 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2020, the structure is relatively new.
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.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Hygiene |
| River/Stream | St Vrain |
| Coordinates | 40.19538, -105.21400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 340 ft |
| Year Completed | 2020 (6 years old) |
Storage & Hydraulics
| NID Storage | 239 acre-ft |
| Max Storage | 239 acre-ft |
| Normal Storage | 133 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 10,063 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Boulder County Parks and Open Space (alexander, Ro |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO03060 |
| Federal ID | CO03060 |
| More Info | State Dam Safety Program |