Report : Rivers in Alaska , California and Oregon are among the 10 most endangered . Report released annually by American Rivers , a leading river - conservation organization . The Flint is one of 40 rivers nationwide that still flow undammed for more than 200 miles . Waterways from past American River ' s reports have been updated .
Report : Rivers in Alaska , California and Oregon are among the 10 most endangered . Report released annually by American Rivers , a leading river - conservation organization . Waterways from past American River ' s reports have been updated .