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t <br />1 <br />1 <br />1 <br />~ , <br />1 <br />DESIGNATION MILEPOST DESCRIPTION AREA (Ac.) <br />Area #1 0.70 Slide Area Result of 1.13 <br /> Slope instability <br />Pond Above #1 0.75 (250' Rt.) Inundation 0, 17 <br /> above Area #1 <br />Area #2 0.65 Roadway Fill Slope 0.12 <br />Area #3 0.65 Roadway Flll Slope O.:i4 <br />Area #4 0.60 "Future" Road Fill O.G3 <br /> to Cedar Heights <br />Area #5 0.45 Sanding Chips Stockpile 0.28 <br />Area #6 0.25 Sanding Chips Stockpile 0.:;0 <br />Area #7 0.05 Sanding Chips Stockpile 0.(~8 <br />Old Scale Site 0.9 Below Visual Berm 0.(~7 <br />(Center oP <br />Section 32-13-67) <br /> TOTAL: 3.:.2 Ac. <br />AREA +~1 =POND ABOVE ~1 <br />This is the largest surface disturbance In the CAP. The area was the <br />subject of the referenced Obering, Wurth & Associates report (July, 1588) <br />and the CTL-Thompson report contained herein. The primary cause of the <br />disturbance was a failure of the fill slope resulting in a significant stream <br />blockage. Storm runoff has been impounded above the blockage cau:•ing <br />loss of some vegetation. The blockage apparently occurred in late 198'i or <br />early 1988 and the slope has been relatively stable since the event. 'Phe <br />current slope varies from 16:1 at the bottom to 1.5:1 at the top with the <br />elevation ranging Prom 6791 to 6889. The impoundment is currently acting <br />as a silt retention facility for runoff Prom the access road and the quarry <br />above the site. <br />s <br />