The immediate impact is largely passed, the slug of contaminated water has washed through the system. Bruce Thomson More Quotes by Bruce Thomson More Quotes From Bruce Thomson These organisms are adapted to live in fast-moving streams with sand and gravel bottoms, and now we’re covering most of that sand and gravel with light, fluffy sludge, it’ll plug up the pours and the organisms will be smothered. They need the sand and gravel to provide nutrients and oxygen. Bruce Thomson us So that will mitigate some of the effects of the contamination. Bruce Thomson us