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Copper Cliff Mine: 1 reportable incident Metal/Non-Metal

Alta Gold Company · Surface

Adams County, ID · Abandoned

MSHA Mine ID: 1000458

Copper Cliff Mine has had no fatalities among 1 reportable incident since 1989.

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Fatalities: 0
Total incidents: 1
Years on record: 1989
Latest incident: Oct 1989

Ownership history

Silver King Mines Inc 1950 to 1989
Alta Gold Company 1989 to present

Source: MSHA controller and operator history, updated weekly.

Workforce and production

Year	Employees
1991	0
1990	1
1989	4

Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.

Local economic context

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County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.

Adams County, Idaho · Population 4,599

1.5%

Mining share of county employment

$59,286

Median household income

Source: US Census Bureau, American Community Survey 2023 5-year estimates.

No fatalities recorded at this mine.

Reportable incidents

1 on file

1989 · 1 incident

October 22, 1989 ID · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver MACHINERY

Alta Gold Company · Flash burns (welding)

HE WAS HELPING WELDER WHEN A WELDING FLASH BURNED HIS EYES.

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Copper Cliff Mine sits in Adams County, Idaho, where the Census mining category is 1.5% of county employment.

Reportable incidents

1989 · 1 incident

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