Map of NRDAR Cases

Mining activities have the potential to release harmful substances into the soil, air and water. Extraction and processing produce tailings piles that can contain radioactive elements, mercury, and heavy metals; leach ponds of cyanide and brine solutions; metallic dust; and waste rock. Environmental contamination at mine sites can be particularly challenging to evaluate due to the variety of...

Chemical or hazardous substance spills can occur during production, transportation, storage, and disposal activities. They kill fish and wildlife, destroy habitat, and contaminate critical resources. These environmental injuries can linger for decades and be difficult to assess. The impact of these type spills is complex and depends upon where they occur, the amount spilled and the chemical...

Crude oil or oil distilled product (e.g. gasoline, diesel fuels, jet fuels) spills can occur during oil exploration, production, and transportation activities. Environmental impacts of spills are complex and can be difficult to assess. The chemical makeup of oil and oil products is diverse which affects oil behavior (e.g. volatilization, sinking). Oil degradation and fate are also influenced by...

USGS science support staff provide database management and system administration for the NRDAR Damage Assessment and Restoration Tracking System (DARTS).