Laserfiche WebLink
<br />WOOdWardoCIY_ <br /> <br />. <br /> <br />Scone Ontion 1 - Combined Piezometer/Inclinometer Casing <br /> <br />The basic Scope of Services includes completion of each drill hole as a piezometer with <br />PYC casing. We believe that the casing installed should be combined piezometer/ <br />inclinometer (CPI) casing, CPI casing contains "grooves" on the inside for measurement <br />with an inclinometer probe. Inclinometer readings provide data on deformation of the <br />embankment and identification of the potential slide plane. Since the slide plane <br />geometry can be difficult to identify in drill holes and by sampling, the inclinometer may <br />provide a direct method to identify slope movement. The use of CPI casing allows dual <br />use of the hole for measurements of water levels and slope movement. The inclinometer <br />can also be used to monitor ongoing slope movement and potential slope movement <br />during further drawdown and/or during embankment repairs. <br /> <br />Installation costs for the CPI will be similar to the PYC casing. The costs shown in <br />Section 6 include the increase in cost for the casing and installation. We have also <br />included the cost for obtaining each set of readings and reducing the data. <br /> <br />Scone Ontion 2 - Dry Core Samnling <br /> <br />Identification of a slide plane in the embankment or foundation can be difficult using <br />conventional drilling and sampling methods because the feature is often thin (on the <br />order of inches), We believe that a continuous "visual" sampling would provide a higher <br />probability of locating the slide plane. One successful method that we have used is a <br />"dry core" sampling device. The dry core sampler consists of a plastic liner inside of <br />hollow stem augers with samples retrieved in 2 to 5 foot lengths. Since the drilling <br />method is slower than conventional drilling, we recommend a limited dry core sampling <br />in two drill holes. We would plan to dry core approximately 60 lineal feet at the most <br />likely locations of a slide plane, <br /> <br />Scone Ontion 3 - Test Pits <br /> <br />Based on our site visit on September 30, 1993, and descriptions by Mr. Troy Templeton <br />and Mr. Mike Graber, there have not been any surface signs of cracking in the crest or <br />upstream slope, It appears that the cracking is related to upstream movement due to <br />Woodward. Clyde Consultants <br /> <br />23360fPRO.4 12-08-93(8:53am)/RPT <br /> <br />4-4 <br />