Progress report on water resources of the Tulalip Indian Reservation, Washington

Updated information on the Tulalip Indian Reservation 's resources indicates that the newly developed tribal well field yielded about 100 million gallons of water during August 1975-October 1976. At 16 or 17 streamflow sites, mean annual discharges during the 1976 water year exceeded those of the 1975 water year by a median value of 25 percent. The levels of John Sam, Ross, and Weallup Lakes rose from 0.6 to 1.0 feet during the period October 1974-October 1976; the increase in volume stored in the three lakes was about 14.5 million gallons. The quality of surface water sampled was generally good. Nitrite and total-nitrogen concentrations tended to be greater during periods of high streamflow than during periods of low flow, whereas total-phosphorus concentrations tended to show the opposite relationship. (Woodard-USGS)