Green Lake is a rockfill dam located in Clear Creek County, Colorado, built in 1914. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 8 ft8 ft tall and 52 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 Green Lake
The primary purpose of Green Lake 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 James Ford (local government). It impounds the South Clear Creek-os near Georgetown.
The dam stands 8 feet tall and stretches 52 feet across, creates a reservoir covering 12 acres, and has a maximum storage capacity of 121 acre-feet. Completed in 1914, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/22/2022.
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Location
| State | Colorado |
| County | Clear Creek |
| Nearest City | Georgetown |
| River/Stream | South Clear Creek-os |
| Coordinates | 39.67722, -105.70473 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 52 ft |
| Year Completed | 1914 (112 years old) |
Storage & Hydraulics
| NID Storage | 121 acre-ft |
| Max Storage | 121 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 12 acres |
| Max Discharge | 7 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | James Ford |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/22/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01249 |
| Federal ID | CO01249 |
| More Info | State Dam Safety Program |