2004-05-26_REVISION - M1998052 - Laserfiche WebLink

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Adequacy of the CN-001 Application 2 Mascot Placer May 26, 2004 Permit No. M-1998-052 a. Planting with the following seed mix, broadcast: PLANT SPECIES PLS/ACRE ~a, 100% % OF MIX LBS/ACRE Garrison Meadow Foxtail 6.0 40% 2.5 lbs Reed Canary Grass 7.7 13% 1.0 lbs Smooth Bromegrass 26.0 25% 6.5 Ibs Red Top 2.0 12% 0.25 lbs Alsike Clover 5.0 10% 0.50 lbs Total Reseeding Rate 10.751bs b. Grading to leave a small berm between the stream and the affected land; 18 inch willow shoots to be planted into the berms. c. Preservation of crushing and screening firies for use in soil building. d. Commitment to investigate and report to DMG on the potential to incorporate cost effective soil amendments into the reclamation of the affected land. e. Grading to provide a natural appearance with undulations as opposed to a flat surface. The DMG has the following comments on the incorporation of a similaz plan into the Mascot Placer CN-001 application. • If you choose the Alpine Rock seed mix for the Mascot Placer, the DMG will require that Mountain Brome replace Smooth Brome at the same application rate. The seed mix approved in the original limited impact section 110 permit for the Mascot Placer, and later deleted through approval of technical revision TR-001, could also be used and is preferable to the DMG. For reference a table describing that seed mix is enclosed with this letter. , The current limited impact section 110 reclamation permit for the Mascot Placer requires the installation of a 1 to 2 foot high berm of well graded dredge tailing along the down gradient edge of the affected land with the installation of additional berms as necessary as the operation enlarges. This requirement will continue to be in effect for the section 112 regular permit that is the subject of the CN-001 application. If these berms were to be planted with willows, they would beleft assemi-permanent features in the reclaimed topography. Under the terms of the CN-001 application, DMG can approve onsite processing with screens and crushers. It is DMG's understanding that sepazate approval from Summit County will be required prior to onsite crushing. Either way, the collection of fines produced during material processing for use in soil building would benefit revegetation efforts. Soil amendments mixed with crushing/screening fines or incorporated into the ground surface that remains when the dredge piles are removed would further benefit revegetation. The DMG estimates that 8 tons per acre of horse manure incorporated into the top six inches of the reclaimed area would provide sufficient organic matter to mimic that found in natural mineral soil. Horse manure also has the advantage of being lower in phosphors than cow manure; phosphorus is a concern in the local receiving waters that fill Lake Dillon. Also, horse manure should be readily available in the vicinity of the Mascot