Laserfiche WebLink
1/27/2016 State.co.us Executive Branch Mail-Fwd:Sediment sources <br /> cutting rill forming at the lower area (attachment 3). The bare area has lost material assuming that the original <br /> ground contour was a straight grade from side-to-side across the corridor, and the rill head cutting is active. <br /> 5. The Magpie Diversion Ditch north berm has an area over 300 feet long that has several bare areas <br /> (attachment 4) extending from 38d17'09.63"N 105d09'01.21"W to 38d17'08.32"N 105d09'05.41"W. Most of these <br /> bare areas are devoid of top soil. There are small rills forming at the sides of some of the bare spots. If the <br /> depth of top soil was measured as adequate for prior bond release, then there has been considerable erosion of <br /> the top soil. If there was never any top soil placed on the berm it is obvious why these areas are bare because <br /> suitable grass supporting soil is lacking. <br /> There is a sixth sediment source that does not report to Pond 5. The Magpie Diversion was cut thru the toe of <br /> the GEC West Pit spoil pile. While EFCI is not responsible for the GEC spoil, the constructed diversion has <br /> resulted in a much shorter and direct path for the great amount of the GEC sediment from the huge rills to runoff <br /> into Magpie Creek. The premining pathway being considerably longer might have allowed more sediment to be <br /> deposited before entering the original Magpie Creek location, thereby retaining more of the GEC sediment on <br /> site. <br /> Doug Corley <br /> 4 attachments <br /> DSC00864.JPG <br /> 5066K <br /> DSC00865.JPG <br /> 4959K <br /> �j �l r // i//✓ di/i <br /> head cutting2.jpg <br /> 4030K <br /> https://mail.googl e.com/m ai I/u/0/?ui=2&i k=e29129fcb5&view=pt&search=i nbox&th=152805926ed62a53&si m l=152805926ed62a53 2/3 <br />