Calvert Mine Spc-4 Dam
Calvert Mine Spc-4 Dam is an earth dam located in Robertson County, Texas, built in 1991. It carries a Low hazard potential classification.
About Calvert Mine Spc-4 Dam
The primary purpose of Calvert Mine Spc-4 Dam 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 Walnut Creek Mining Company (private). It impounds the Tr-big Willow Creek.
The dam stands 19 feet tall and stretches 1,820 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 159 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1991, the structure is 35 years 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 05/08/2002. That was over 23 years ago.
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Location
| State | Texas |
| County | Robertson |
| River/Stream | Tr-big Willow Creek |
| Coordinates | 31.10443, -96.64649 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 1,820 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 159 acre-ft |
| Max Storage | 159 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 3,182 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Tailings |
| Owner | WALNUT CREEK MINING COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 05/08/2002 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX06560 |
| Federal ID | TX06560 |
| More Info | State Dam Safety Program |