Marion
Marion is a rockfill dam located in Custer County, Colorado, built in 1909. It carries a Low hazard potential classification.
About Marion
The primary purpose of Marion is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Marion Mines & Hill Co. (private). It impounds the Amethyst Crk. near San Isabel.
The dam stands 10 feet tall and stretches 310 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1909, 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.
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Location
| State | Colorado |
| County | Custer |
| Nearest City | San Isabel |
| River/Stream | Amethyst Crk. |
| Coordinates | 37.99168, -105.11557 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 310 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 150 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | MARION MINES & HILL CO. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00492 |
| Federal ID | CO00492 |
| More Info | State Dam Safety Program |