Shallow Pore Pressure (1.77 meters)
Graphs of pore-water pressure portray groundwater conditions at various depths, as noted on the graphs. Pressure at a particular depth is shown as an equivalent water depth, in centimeters. Groundwater in an open tube would rise to this height above the sensor. Sensors are bi-directional, temperature-compensated, amplified, strain-gauge type pressure transducers vented to the atmosphere and installed in a small diameter PVC casing. During dry periods (such as late summer or early fall), these sensors often record pore-water pressures near zero.
WARNING: Provisional data, subject to revision
NOTE - data available since March 22, 19974-Day Graph
![4-day graph](https://webarchive.library.unt.edu/eot2008/20081105111501im_/http://landslides.usgs.gov/monitoring/hwy50/rtd/plots/c154_4dy.png)
4-Week Graph
![4-week graph](https://webarchive.library.unt.edu/eot2008/20081105111501im_/http://landslides.usgs.gov/monitoring/hwy50/rtd/plots/c154_4wk.png)