Marshall
Marshall is an earth dam located in Adams County, Colorado, built in 1904. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Marshall
The primary purpose of Marshall 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 Brighton.
The dam stands 26 feet tall and stretches 547 feet across, creates a reservoir covering 6 acres, and has a maximum storage capacity of 98 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 04/15/2019.
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Location
| State | Colorado |
| County | Adams |
| Nearest City | Brighton |
| River/Stream | Brantner Gulch-tr |
| Coordinates | 39.94000, -104.91557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 547 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 6 acres |
| Max Discharge | 1,934 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF THORNTON |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/15/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01127 |
| Federal ID | CO01127 |
| More Info | State Dam Safety Program |