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(httlook Print Message htq,s:' hlul(').nkiil.li . r . rcmvnuul l'rngl�t�aa�!cs.atih�:':I,I. Iti Ui <br />Nationwide Permit, as subsequently determined by your office. <br />Two location maps lead the attachments, to better identify where the Durham Project area is located. <br />The first location map shows the location of the site relative to the City of Greeley on a USGS Quadrangle <br />Map. The second location map is taken from the state permit and better shows the position of the area <br />relative to local streets. <br />The next attachment is a close up of the breach area as measured by laser in October as it lies in the <br />NE /4 of Section 9 along the Cache la Poudre River. Little to no changes have occured since that <br />measurement as illustrated. <br />Below, following our narrative, are selected images during and following flood events that created the <br />breach into our extraction basin on 16 September 2013, followed by images of current conditions as of 8 <br />November 2013. We trust the images will better translate present day conditions relative to the flood <br />events. <br />Whether the underlying aggregate was washed in by the river, or the remnant of the underlying berm, or <br />a little of both, approximately 3,341 cu.yds. of material is needed to return the berm across the <br />breached area and level with the concrete sill. The estimated volume is based upon fill extending <br />approximately 25 feet north and south from the center of the visible sill remnants flanking the breach, <br />plus an additional 12 feet needed to establish a 3H:1V slope once the fill reaches elevation. These are all <br />unavoidable approximations as the ground is variable in height, and undulates in all directions. <br />The fill necessary to restore the breached area will be comprised of recycled concrete blocks mixed with <br />overburden, followed by a cap of overburden alone two feet in depth, and finally by soil over the finished <br />fill to a minimum of one foot in depth. The soiled cap will be seeded beginning this spring with one of <br />the approved Durham State of Colorado Office of Mined Land Reclamation (OMLR) seed mixtures, and <br />the vegetation monitored and inter- seeded with the alternative mixture until established (refer to seed <br />mixtures as attached). <br />No wetland species are affected as best as I can determine, as any previously existing stands of <br />vegetation were apparently removed by the erosive force of the flood waters. Also included is a map <br />showing the approximate location breach and replacement are of the reconstructed berm, with the <br />dimensions and volume /composition as stated, above. <br />This appears to fall under Nationwide Permit NWP 13 - Bank Stabilization - with limits up to 500 feet. <br />My thinking at this point is that a Nationwide permit may be unnecessary if the fill does not enter the <br />Water's of the U.S.; depending upon the Corps tolerance for any minor spillage along the underlying <br />foundation abutting the waters of the Cache la Poudre River. The information provided in this e -Mail <br />should be sufficient to either waive the Nationwide Permit, or to include the proposed work in the <br />appropriate section of the Nationwide Permit processes. <br />The remnant of the failed concrete sill flanks the breach and assures the return elevation limit as any fill <br />will use the top of the existing sill to limit the height of the fill such that it will be equal to or less than <br />that of the sill flanks. The elevation restriction along this segment of the reconstructed berm is also <br />protected as an existing requirement of the OMLR Permit M- 1978 -056. <br />Operations to the east of the cut do not appear that they entered Waters of the U.S. or to have affected <br />any prohibited vegetation affected by that activity. The extent appears to be approximately 100 -125 feet <br />40-11 11 1N 21013 1 ' 00 1 ",I <br />