With snow levels at a near-record low, a third dry year in California is leaving waterways in Northern California on the verge of drying up. In the Northern Sierra, the snowpack is only 23 percent of average so far this year. Now, a coalition of Northern California environmental groups, Indian tribes and fishermen are urging the State and Regional water boards to the Federal Clean Water Act to save salmon and other species at risk. Vic Bedoian reports from Fresno.