The snail darter held up construction of the tva tellico dam for two years . But since 2022 they been taken off endangered species list .when we log a tract in middle tn we get a map showing the possible endangered or threatened species in the creeks or water ways . It’s always been the snail darter at top of list . Better stay out them creeks with logging equipment. Paper company IP had an PR person on site one time in westpoint tn where they released some them darters . On front page of local paper back in the 90s.