Sediment samples were collected at Pine Creek on March 29 and 30, April 18, and May 7, 1980 ( fig. 46 ). Sediment concentrations ranged from 4 to 11 mg/L. In April 1980, a water-quality monitor with satellite telemetry was installed at a highway bridge near the mouth of the stream. The monitor was destroyed when Pine Creek was inundated with a lahar on May 18, 1980. Elevated annual sediment discharges persisted during 4 years of observation. On November 7, 1980, sediment concentrations exceeded 100,000 mg/L, and peak measured concentrations in subsequent water years ranged from 24,000 to 69,000 mg/L. Annual sediment discharge declined by about half over water years 1982-84. The gaging station was discontinued after water year 1984.
