Thompson is an earth dam located in Weld County, Colorado, built in 1888. It carries a Low hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 1,536 ft long. 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 Thompson
The primary purpose of Thompson is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John Howard, (private). It impounds the Big Dry Creek near Fort Lupton.
The dam stands 11 feet tall and stretches 1,536 feet across, creates a reservoir covering 18 acres, and has a maximum storage capacity of 265 acre-feet. Completed in 1888, 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. The most recent inspection on record was 07/20/1987. That was over 39 years ago.
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Location
| State | Colorado |
| County | Weld |
| Nearest City | Fort Lupton |
| River/Stream | Big Dry Creek |
| Coordinates | 40.03500, -104.89557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,536 ft |
| Year Completed | 1888 (138 years old) |
Storage & Hydraulics
| NID Storage | 265 acre-ft |
| Max Storage | 265 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 18 acres |
| Max Discharge | 223 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | John Howard, |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/20/1987 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01892 |
| Federal ID | CO01892 |
| More Info | State Dam Safety Program |