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HALL IRWIN COMPANIEBIO 0 PAGE 4 <br /> BAILEY PIT -TECHNICAL REVISION <br /> SEPTEMBER 23, 199B <br /> pound per sq-ft that is greater than normal NRCS recommenda- <br /> tions. <br /> Species LB-PLS <br /> Western Wheatgrass 1.50 <br /> Garrison Foxtail 1.25 <br /> Tall Fescue 2.25 <br /> Reed Canary Grass 1.25 <br /> Alkali Sacaton 0.15 <br /> Switchgrass 0.75 <br /> Total 7.15 <br /> CONCLUSION <br /> This Technical Revision cleans up some minor problems that <br /> have occurred over the life of the mine. It also increases the <br /> chances of us completing reclamation successfully. The 404 <br /> Permit work will hopefully help stabilize the river banks during <br /> normal spring flow rates but is not intended to redesign the <br /> channel for 100 year events. It will be important to have the <br /> Division and ACOE review the site before next spring to release <br /> the bank work incase there is another catastrophic high water <br /> event. The change in woody species removes the Russian Olive <br /> trees to avoid conflict with DOW and NRCS when bond release <br /> occurs and the grass seed changes improve the diversity of <br /> grasses used for reclamation. <br /> Tectonic has said they need to begin the sloping work by the <br /> end of September to stay within a time frame set during meeting <br /> with the Corps of Engineers. we would appreciate quick approval <br /> of the T.R. so the work can begin ASAP. If you have any ques- <br /> tions please call me at 303-654-1604 . <br /> ncerel <br /> I�J f Gregg <br /> cc Environment, Inc. <br /> Tectonic Constructions CO. <br /> File <br /> enclosures <br />