Monticello Millsite Pond #4 is an earth dam located in San Juan County, Utah. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 1,650 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 Monticello Millsite Pond #4
The primary purpose of Monticello Millsite Pond #4 is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by US Dept. of Energy Grand Junction (federal).
The dam stands 14 feet tall and stretches 1,650 feet across, and has a storage capacity of 55 acre-feet.
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 | Utah |
| County | San Juan |
| Coordinates | 37.84565, -109.33682 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Length | 1,650 ft |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Normal Storage | 55 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner | US Dept. of Energy Grand Junction |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | UT21467 |
| Federal ID | UT21467 |
| More Info | State Dam Safety Program |