East Lake #2
East Lake #2 is an earth dam located in Adams County, Colorado, built in 1889. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About East Lake #2
The primary purpose of East Lake #2 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Thornton (local government). It impounds the Brantner Gulch-tr near Thornton.
The dam stands 12 feet tall and stretches 1,400 feet across, creates a reservoir covering 24 acres, and has a maximum storage capacity of 176 acre-feet. Completed in 1889, 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 11/02/2022.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Adams |
| Nearest City | Thornton |
| River/Stream | Brantner Gulch-tr |
| Coordinates | 39.91762, -104.95400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 1,400 ft |
| Year Completed | 1889 (137 years old) |
Storage & Hydraulics
| NID Storage | 176 acre-ft |
| Max Storage | 176 acre-ft |
| Normal Storage | 94 acre-ft |
| Surface Area | 24 acres |
| Max Discharge | 45 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF THORNTON |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/02/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02110 |
| Federal ID | CO02110 |
| More Info | State Dam Safety Program |