The data are collected on a 15-minute interval. The original measurements have been rounded to a number of digits appropriate for the accuracy of the data. No data are included for sensors that consistently have signals out of the manufacturer's specified range. Small negative pressure indicates partially saturated or unsaturated conditions, the porous tip on the sensors has a relatively low air-entry pressure, so negative pressures measured may not be accurate. The sensors in borings 1 and 5 are strain-gauge type pressure transducers that have ranges of 30 p.s.i.
Extensometer output is reported in centimeters.
Constant output indicates no movement. Steady change from a constant trend indicates movement. E-1 has a noisy signal, no actual movement has occurred. Extensometer E-3 was repaired on 15 September 1999. Movement occurred at E-3 when a block of soil fell off the landslide head scarp sometime between 11 June and 30 June 1999.