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in size and have less than 3 percent passing the No. 200 sieve. We also recommend that a layer of riprap, at <br />least 12 inches in thickness be placed above the drainage gravels in the Channel. Details for the proposed <br />drainage systems are provided on the attached plans (Sheet 1 of 2). Typical Trench and Channel cross <br />sections are shown in Sheet 2 of 2. <br />The actual depths and finished configurations for the Trench and Channel should be determined in the field <br />as the groundwater and bedrock conditions are exposed and can be observed. In addition, details provided <br />for drainage systems may need to be reevaluated based on the conditions encountered in the excavations at <br />the time of construction. <br />If you have any questions regarding this report or the attached plans, figures and table, or if we can be of <br />further service, please contact this office. <br />Sincerely, <br />NWCC, INC., <br />Brian D. Len, <br />;7j-;a 0 . <br />cc: Jay James <br />Job Number: 07 -7600 NWCC, Inc. Page 4 <br />