Mccaslin is an earth dam located in Boulder County, Colorado, built in 1908. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 16 ft16 ft tall and 435 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 Mccaslin
The primary purpose of Mccaslin is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John Stransky (same) (private). It impounds the St Vrain Creek-tr near Longmont.
The dam stands 16 feet tall and stretches 435 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 167 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1908, 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 07/21/2017.
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Location
| State | Colorado |
| County | Boulder |
| Nearest City | Longmont |
| River/Stream | St Vrain Creek-tr |
| Coordinates | 40.18313, -105.21341 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 435 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 167 acre-ft |
| Max Storage | 167 acre-ft |
| Normal Storage | 119 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | John Stransky (same) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/21/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01228 |
| Federal ID | CO01228 |
| More Info | State Dam Safety Program |