2007-03-20_PERMIT FILE - C1996083

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M03106GE If it is desired to conduct construction of the gob pile or top soil and cover material storage piles during late fall, winter or early spring, it should be noted that freezing of the last lift of the previous day's work is likely. If this is the case it will be necessary to protect that area of the on-going work from freezing or removing the frozen material prior to the onset of the next day's work. It may be helpful to stockpile dry material and place a loose lift of this dry material to protect the placed and tom- , patted fill from frost. The material may be removed the next morning and returned to stockpile for future use. If the material should become moistened, such as from rain or snow, the material should be stored separately from the dry stockpile material. 4.5 Settlement Our study included a settlement analysis of the foundation soils supporting the proposed gob pile. Our settlement analysis is based on the anticipated surcharge from the proposed gob pile when completed and laboratory consolidation tests of the foundation soils. Based on our settlement analysis we anticipate that the post construction long term settlement will be about three (3) to four (4) feet at the maximum section, becoming less toward the edges. We understand that the gob pile construction will occur over a long period of time. We anticipate that much of the esti- mated settlement will occur as the pile is constructed. 5.0 POST DESIGN CONSIDERATIONS The project geotechnical engineer should be consulted during construction of the project to observe site conditions and open excavations during construction and to provide materials testing of soil and gob material placement. This subsurface soil and foundation condition study is based on limited sampling; therefore, it is necessary to assume that the subsurface conditions do not vary greatly from those encountered in the field study. Our experience has shown that significant varia- tions are likely to exist and can become apparent only during additional on site excavation. For this reason, and because of our familiarity with the project, Lambert and Associates should be retained to observe foundation excavations, to observe the geotechnical engineering aspects of the construction and to be available in the event any unusual or unexpected conditions are encountered. The cost of the geotechnical engineering observations and material testing during construction or additional engineering consultation is not included in the fee for this report. We recommend that your construction budget include site visits early during construction schedule for the project geotechnical engineer to observe foundation excavations and for additional site visits to I~ 8 Lambert ana ~~~aciate~ CONSULTING GEOTEGNNICAL ENGINEERS AND MATERIAL TESTING