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Colorado West Regulatory Office <br />Sacramento District, USACE <br />p. 970.243.1199 x13 <br />f. 970.241.2358 <br />Sacramento District Regulatory Home Page: http: / /www.spk.usace.army.mil /Missions /Regulatory.aspx <br />Performing a delineation of waters of the U.S.? Be sure to follow the Minimum Standards: <br />http: / /www.spk.usace.army.mil /Portals /12 /documents /regulatory /pdf /min standards.pdf <br />Let us know how we're doing: <br />http: // pert .nwp.usace.army.mil /survey.html <br />*********** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** <br />- - - -- Original Message---- - <br />From: Nettleton, Jerry [ mailto :JNettleton @peabodyenergy.com] <br />Sent: Thursday, November 14, 2013 9:34 AM <br />To: Moore, Stephen A SPK <br />Cc: Berdine, Mike; Musick - DNR, Jason <br />Subject: [EXTERNAL] Twentymile Coal, LLC - 7RT Thickener Underflow Project <br />Steve - <br />Attached is an aerial image with Foidel Creek, the existing railroad spur, County Road (Routt County Road 33), existing <br />6RTThickener Underflow Borehole and access, and the proposed 7RT Thickener Underflow Borehole and Pipeline. The <br />location is NW /4NW /4 Section 28, TSN, R86W. The proposed 7RT Borehole would be drilled from an existing pad <br />adjacent to the County Road, and the pipeline would be trenched in and buried adjacent to the County Road, well up out <br />of the Foidel Creek floodplain. All construction would include appropriate drainage and sediment control measures <br />(staked straw wattles below the pipeline trench and straw wattles and a berm on the stream side of the pad area) to <br />minimize sediment discharge to the creek. The pipeline will be a double -wall fused HDPE pipeline with leak detection, <br />buried approximately 5 feet deep. <br />We will not be crossing Foidel Creek (current pipeline to 6RT Thickener Underflow Borehole was bored under the creek <br />and rail spur), and do not anticipate any disturbance within the Foidel Creek floodplain or the marginal wetlands that <br />exist in a thin band along the stream channel. As I mentioned, we don't anticipate that this activity would be <br />jurisdictional, but wanted to contact you with basic details to verify. <br />Thanks for your attention and consideration. Please feel free to contact me with any questions, or to discuss - <br />Best regards, <br />z <br />