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<br />rNV.~ONMaN T. ,NG. <br />m~Y aa, cool <br />PAaE 4 <br />will be doubled iri accordance with the guidance document's recommenda- <br />tiens. <br />River beak armoring <br />The armoring will be dnnp along the river channel side of tlin <br />banks but only whoro mining iq with.i.n 400 Yest of the riVeT. A map <br />will be proparod and submitted to the Di.viginn showing the dTeas oP <br />cuuuern for review and approval prior mining within 400 Yeet of the <br />river. In Lha arena where armoring ie required, Platte sand 6 Gravel <br />will Follow the guidelines published by tho Division. Tn general, a <br />D„ x 1.75 to 3.o will be used depending on the site speci.fie require- <br />ments in eaoh reach 6~iny armored. If en armored reach code on a <br />natural riverbank, tlae oivlalon•s published guidance for riprap end <br />protection will be followed. Thi^ calls for doubling the riprap <br />thi.ekness at the ends o! an armored reach that t,eyin artd end on <br />natural banks or extending them to non giro®ive areas. <br />The riverbank armor will hq keyed five legit below the rival bed <br />or, altornativaly, extension n4 A thlrkei (doubled) layer of riprap <br />into the channel bad will be done as suggested in the guidance docu- <br />ment_ (Bigurea b-5 and 0-a, DMG, 1998, copies attached). ~1'rier6 may <br />be aroao where koyinq the toe into th~+ ri vvr bnttOm ie nOt pI8Ct1C81 <br />ao both methods may bo used dopondinq on what is encountered In a <br />reach. A granular bodding and filter wi.l.l hP placed under the Yip <br />ray. As notod above the in cite material will he tested at ear..h site <br />to determine if it is acceptable. Prior to installing riprap into <br />areas of a uul !rank, it will be graded to no steeper than 1.5:1 and <br />granular bedding and filter aubyrade will be placed. <br />On the arose o! riprap abovr ll-e normal highwater line the <br />applicant will use a method o! elopr protection meaaurea found in <br />eeeti.an 2.3.2 of tho Urban Drainagfl and Blood control yu.ideline <br />document, in general, a Cover O! dirt Mill be placed over the riprap <br />and will.nw etakee and grass will be planted to lack 1.1,e ~].i.rt in place. <br />Tha willows will eventually spread and create a vegntaLion l,lanket <br />ttrat slows flood water along a bank reducing sroaion. <br />The biauLable for riprap iaatallatien <br />The timing for rip-rap placemont dnpenda on how fast the mine <br />develops, Ths operator will make every rsanonable effort to enmp.lete <br />final lakeshore protection measures for all ouch areas prior to Apri.t <br />let o! oath year. The lakoehora aenaitivo aroao are thoe9 AT.gAa <br />depleted in green on the map included with this reeponae. Map Exhibit <br />C-1 show flow L'I~e uilne will look approximately 15 yaara after mining <br />COd W~S:C SODZ ZZ '~+eW 66~L CZr COC '^PI 3hlOWd 7h11 '1N3Whpb[(tPl3 ~~~^'d <br />