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of the embankment will be constructed to minimum construction <br />standazds and specifications of Montrose County, Colorado, for County <br />acceptance approximately 7-I S yeazs after completion. <br />3. RECOMMENDED G60TECHNICAL SPECIFICATIONS <br />General geotechnical specifications and related notes are summarized <br />on the attached Figure I . <br />3.1 FOUNDATION ACCEPTANCE CRITERIA <br />At the time of this report, 007 pond had been excavated to total depth <br />exposing sandstone bedrock along the entire length of the embankment <br />foundation. Since excavation of the pond, 1 to 2 feet of sediment has <br />settled into the pond bottom in the area of the embankment. <br />• To reduce the potential for excessive settlements of the rockfill <br />embankment, we recommend the structure be founded directly on the <br />sandstone bedrock at the bottom of the pond. This will require that the <br />recently deposited sediment be removed and bedrock exposed within <br />the footprint azea of the rockfill embankment. We recommend that a <br />representative of our firm be present during this operation to confirm <br />the presence and type of bedrock exposed in the foundation and to <br />make any adjustments to the geotechnical specifications if necessazy. <br />3.2 ROCKFILL MATERIAL <br />"Rockfill" is defined as containing less than 50% (by weight) smaller <br />than 1-inch diameter particles and a maximum rock particle size being <br />75% of lift thickness (14 inches for 18-inch lifts, 18 inches for 24-inch <br />lifts), necessary to provide a relatively smooth surface for compaction. <br />The rockfill must also contain less than 15% (by weight) fines passing <br />• 3 <br />