A-20 is an earth dam located in Adams County, Colorado, built in 1927. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 20 ft20 ft tall and 1,431 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 A-20
The primary purpose of A-20 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Todd Creek Village Metro District (private). It impounds the Big Dry Creek-tr near Fort Lupton.
The dam stands 20 feet tall and stretches 1,431 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 104 acre-feet. Completed in 1927, the structure is well-established, with more than 75 years of service.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 09/25/2013. That was over 13 years ago.
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Location
| State | Colorado |
| County | Adams |
| Nearest City | Fort Lupton |
| River/Stream | Big Dry Creek-tr |
| Coordinates | 39.99603, -104.90508 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 16 ft |
| Dam Length | 1,431 ft |
| Year Completed | 1927 (99 years old) |
Storage & Hydraulics
| NID Storage | 104 acre-ft |
| Max Storage | 104 acre-ft |
| Normal Storage | 64 acre-ft |
| Surface Area | 10 acres |
| Max Discharge | 757 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Todd Creek Village Metro District |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/25/2013 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO02293 |
| Federal ID | CO02293 |
| More Info | State Dam Safety Program |