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At approximately Station 132+00 the pipe through the natural ground under <br />the levee was completely filled with grout and a concrete cutoff plug and collar built <br />on the creek side of the levee. <br />The creekside slope of the levee was rip- rapped. Design and observation of <br />the rip -rap placement was performed by Ayres Associates. <br />LEVEE ANALYSIS <br />The elements necessary to geotechnically evaluate the levee were a. an <br />idealized soil profile generated from conditions exposed in test holes and test pits, <br />b. soil characteristics and strength data from field and laboratory tests, . <br />permeability results from Meld and laboratory test, d. design earthquake and flood <br />events, and e. location of ground grater. Each of these elements are described in <br />the following paragraphs. The results of the levee analysis described below <br />indicate the levee meets FEMA criteria for slope stability and piping through and <br />u n der the levee. <br />. The soil profile can be idealized as the compacted levee fill <br />underlain by uniform foundation soils as shorn in Fig. 7. The contact <br />between the bottom of the levee and the natural ground was taken en from the <br />grading plans for gravel pit reclamation and by interpolating between test <br />holes and test pits. The foundation soils were sufficiently homogeneous to <br />be denoted as a continuous soil layer Bedrock was sufficiently deep that <br />it was considered to have no affect on the analyses and therefore, is not <br />shown in the soil profile. <br />Results of field and laboratory tests need to be combined <br />with field observations and engineering judgment to identify the likel <br />properties of the soils making up the profile of the levee. The levee fill <br />consists of both the fill placed during maintenance and the original <br />embankment fill. Bath types of levee fill and the foundation soils consisted <br />of similar materials. Compaction of the maintenance embankment fill was <br />FLATIRON COMPANIES <br />LEVEE AT DEEPS FARM PIS` <br />CTS' 25,385 <br />