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• <br />PROJECT BACKGROUND <br />During the previous study, four standpipe peizometers were installed in bore holes to <br />measure water levels. Four 1.9 inch diameter inclinometer pipes were also installed <br />adjacent to each of the peizometer installations and have been read by physically <br />occupying the site and inserting a probe into each of the casings. Inclinometers are a <br />type of geotechnical instrumentation known as a transverse deformation gauge in that <br />they measure ground movements in a direction transverse to the orientation of a <br />borehole into which the casing has been installed. They work by taking a series of <br />readings along the casing with a moveable probe which is lowered into the hole. The <br />probe contains a set of orthogonal gravity sensing transducers which produce a <br />variation in output voltage which is proportional to the orientation of the probe with <br />respect to the local direction of the gravitational force. The data is reduced to provide <br />the shape of the casing relative to the original shape of the casing at the time of the <br />0 initial readings. <br />These measurements were successful in indentifying the depth of the slide plane as <br />well as the direction and magnitudes of movement during intermittent periods when the <br />slide was active. Inclinometer numbers 3 and 7 showed the most movement and we <br />believe them to be the most likely to show early warning signs of future movement. <br />PRODUCT DESCRIPTION AND GENERAL APPLICATION <br />In order to accomplish real time monitoring of ground deformation, this plan describes <br />the use of electrolytic in-place inclinometers which are connected to a data logger and a <br />communication package. The system is capable of sending the sensor readings to a <br />software package which resides on the internet and has the capability of alerting users <br />of ground movements which exceed preset levels or of system failures for any other <br />• reason. Details on the various component of the system are provided in the attached <br />manufacturer sheets. <br />2