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THE DIRT: Dayrock Complex Mitigation efforts

| April 14, 2026 1:00 AM

The Dayrock Complex is located near Wallace within Ninemile Creek Basin watershed and is included in the Upper Basin of the Bunker Hill Mining and Metallurgical Superfund site. This site offers a real-world example of how the National Historic Preservation Act (NHPA) guides decisions and mitigation when cleanup efforts affect historic resources.  

During the Historic Resource Survey, 18 historic-period architectural resources and one archaeological resource were identified leading to the determination that it is a historic district. The Dayrock Complex was determined to be eligible for listing in the National Register of Historic Places as a significant representation of historic mining technology. 

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