Lewis is a rockfill dam located in San Miguel County, Colorado, built in 1904. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 16 ft16 ft tall and 190 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Lewis
The primary purpose of Lewis is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Newmont Mining Corporation (private). It impounds the Bridal Veil Creek near Telluride.
The dam stands 16 feet tall and stretches 190 feet across, creates a reservoir covering 25 acres, and has a maximum storage capacity of 175 acre-feet. Completed in 1904, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 08/24/2018.
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Location
| State | Colorado |
| County | San Miguel |
| Nearest City | Telluride |
| River/Stream | Bridal Veil Creek |
| Coordinates | 37.88320, -107.77560 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 190 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 175 acre-ft |
| Max Storage | 175 acre-ft |
| Normal Storage | 175 acre-ft |
| Surface Area | 25 acres |
| Max Discharge | 100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Newmont Mining Corporation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/24/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00929 |
| Federal ID | CO00929 |
| More Info | State Dam Safety Program |