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M99238GE • 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 compacted 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 rain cr snow, the materi- al should be stored separately from the dry stockpile material. S.9 Borrow Material IC is our understanding that the borrow material will be obtained within the sediment pond area. The area of the borrow should be stripped of all topsoil, organic and deleterious material. The topsoil may be stockpiled for later use. The topsoil should not be included in the structural portion of the dam embankment. The final constructed excavated cut slopes of the borrow area should be at an inclination of interior excavation cut slopes as discussed above or flatter after the borrow material has been removed. 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 ar_d to provide materials testing of soil and concrete. 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 prior to foundation construction, 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 geotech- nical engineering observations and material 'testing during con- struction 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 test compacted soil. 9 Lambert atla q,~,~o~iate,s C ONSUL LING GEOTECNNiC~L ENGiN EE AS eNG u~iENlel TESTING