Divide
Divide is an earth dam located in Boulder County, Colorado, built in 1879. It carries a Low hazard potential classification.
About Divide
The primary purpose of Divide is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Dietzler Ranch And Cattle (private). It impounds the St. Vrain Creek-os near Johnstown.
The dam stands 8 feet tall and stretches 1,850 feet across, creates a reservoir covering 77 acres, and has a maximum storage capacity of 510 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 04/21/2022.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Johnstown |
| River/Stream | St. Vrain Creek-os |
| Coordinates | 40.24030, -105.08803 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 1,850 ft |
| Year Completed | 1879 (147 years old) |
Storage & Hydraulics
| NID Storage | 510 acre-ft |
| Max Storage | 510 acre-ft |
| Normal Storage | 405 acre-ft |
| Surface Area | 77 acres |
| Max Discharge | 40 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | DIETZLER RANCH AND CATTLE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 04/21/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01206 |
| Federal ID | CO01206 |
| More Info | State Dam Safety Program |