Work begins to strengthen cap at former gypsum repository
KELLOGG — Silver Valley residents may have noticed heavy equipment operating recently between Kellogg and Smelterville. The work is part of ongoing maintenance and remediation at the A-4 property, a 13.5-acre former gypsum repository within the Bunker Hill Superfund site.
Stauffer Chemical owns the property, located along Silver Valley Road near the entrance to the Galena Ridge subdivision. According to the Idaho Department of Environmental Quality, Stauffer must maintain the repository's protective cover system under an approved operations and maintenance plan.
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