Calkins is an earth dam located in Boulder County, Colorado, built in 1879. It carries a Low hazard potential classification.
Dam profile
NID height · 8 ft8 ft tall and 705 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 Calkins
The primary purpose of Calkins is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by James Stamp (private). It impounds the St. Vrain Creek near Platteville.
The dam stands 8 feet tall and stretches 705 feet across, creates a reservoir covering 17 acres, and has a maximum storage capacity of 187 acre-feet. Completed in 1879, 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 09/09/1985. That was over 41 years ago.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Platteville |
| River/Stream | St. Vrain Creek |
| Coordinates | 40.18834, -105.05723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 705 ft |
| Year Completed | 1879 (147 years old) |
Storage & Hydraulics
| NID Storage | 187 acre-ft |
| Max Storage | 187 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 17 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | James Stamp |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/09/1985 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01202 |
| Federal ID | CO01202 |
| More Info | State Dam Safety Program |