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CESPK-CO-O ch 10, 1992 JOINT PUBLIC NOTICE NO. 199200135 wood trees on the east bank and pon rosa pine trees o the west bank at this site. Surround' g land use is chars terized by agricultural and rural resid ces. Because of the constant bedload depositing, several di s have been construe d between ouray and RidgewaX for flood ontrol purposes. Such a dike was constructed in this area in he mid-1970's to prote t County Road 23 (west of the river) and s referred to in the p lie notice as an existing berm. ADDITIONAL INFORMATION: he gravel excavation erations will be performed in two phases. Currently the existi berm separates these phases. Phase I traction will occur the west side of the river and measure a proximately 100'x800' 10'. Placement of fill is not required fo this phase of the eration and it may proceed independent of a Corps permit. Ph a II extraction will involve temporarily rero ting the active annel to the Phase I excavated area and extra ting gravel on a east side of the property (presently the a tive channel) easuring 150'x1000'x10'. This rechannelization is oposed by c ting and shifting the existing berm on the south boundary o the permit area to con- struct a temporary dike wit native erm material which will allow the active channel to elocat to the Phase I mined area. Two 48-inch culverts will be lace in the center of the Phase I area topped with native mater al o provide equipment access to the Phase: II area. Riprap (2' d'ameter) will also be placed in_ _ -teh northwest;-southwest-,-anct' t ends of the property. This fill will be used to protect t banks from channel erosion and to reinforce th.e northwest en om the diverted flow which rejoins the existing channel t his corner of the property. In the event the river down is at the southern (upstream) end of the site, a rail/wire s' 1 will~..be placed under groundlevel. The 85 pound rails will b driven 15 feet at 10 feet centers across the channel and a 20 feet centers parallel to it connected with chain li fencing. After installation, cobble and gravel back:fill wil be placed on the upstream side and larger ri~rap an the d wnstream side. Upon completion of Phase II, the diversion dik will be removed and the river returned to it's pre-existing location. Gravel mining will be done inter- mittently on ani "as need" basis. All excavated material will be hauled off loca~tio, to the specific use site(s). The applicant hiss requested water quality certification from the States of Colorado, Department of Health in accordance with Section 401 of e CWA. Written comments on water quality certifice~tion ~ ould be submitted to Mr. J. Robert Owen, Planning and :andards Section, Colorado Department of Health, 4210 East: llt Avenue, Denver, Colorado 80220, on or before the expii•ati n date of this notice. 2 \J • .M ti