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(ASTM C-131 or ASTM C-535), and the Soundness of Aggregates by Freezing <br />and Thawing Test (AASHTO T 10-78). For check dam No. 1 to No. 6 and No. <br />15, the test results will be forwarded to the Department as soon as the <br />tests are completed. For check dams No. 7 to No. 14, the rock source <br />will be sampled and test results submitted before the rock is placed. <br />Proposed check dams (No. 7 to No. 14) will be keyed into the reclaimed <br />channel for a depth of at least one foot, and be constructed to the <br />typical shape as shown in Figure 13-8-2. All check dams will be <br />routinely maintained and inspected to ensure that no piping occurs <br />around or under the placed rock. <br />• <br /> <br />13-8-3 Revised 07/24/90 <br />