Western Mobile Lake 4 is an earth dam located in Boulder County, Colorado. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 1,050 ft long, taller than 76% 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 Western Mobile Lake 4
Western Mobile Lake 4 is a dam in Boulder, Colorado. It impounds the St Vrain near Longmont.
The dam stands 33 feet tall and stretches 1,050 feet across, creates a reservoir covering 32 acres, and has a maximum storage capacity of 710 acre-feet.
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.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Longmont |
| River/Stream | St Vrain |
| Coordinates | 40.19611, -105.21653 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 31 ft |
| Dam Length | 1,050 ft |
Storage & Hydraulics
| NID Storage | 710 acre-ft |
| Max Storage | 710 acre-ft |
| Normal Storage | 598 acre-ft |
| Surface Area | 32 acres |
| Spillway Type | None |
Ownership & Safety
| Owner Type | Not Listed |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO03014 |
| Federal ID | CO03014 |
| More Info | State Dam Safety Program |