2006-06-12_REVISION - M1982015 (25)

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Ms. Deb Gonima June 12, 2006 Page 4 of 12 The following seed mixes are planned for installation around the lakes: OVERFLOW ECOLOGICAL MIX For use alon ~ shoreline and in areas subject to ftoodin Common Name j Variety PLS/Acre °h in mix Rate (PLS Ib/ac) Western wheat rass j Arriba or Barton 16.0 40 6.4 Switch rass Grenville or Nebraska 28 4.0 20 0.8 Blue rama IHahita or Lovin ton 3.0 10 0.3 Alkali sacaton Salado 1.5 10 0.15 Sideoats rama ~ Vau hn or Butte 9.0 10 0.9 Little bluestem Pasture, Cimmarron 7.0 10 0.7 100% 9.25 PLAINS MIX For use in hi her areas not subject to floodin Common Name ' Variety PLS/Acre °k in mix Rate (PLS Ib/ac) Western wheat rass ~' Arriba or Barton 16.0 40 6.4 Blue rama IHahita or Lovin ton 3.0 20 0.6 Prairie sandreed ', Goshen 6.5 20 0.13 Sideoats rama i Vau hn or Butte 9.0 10 0.9 Little bluestem Pasture, Cimmarron 7.0 10 0.7 100% 8.73 10. Attached is an existing vegetation description that was obtained by the Natural Resources Conservation Service. Tab 8 11.Borrow for (fine materials) for slurry wall construction will be obtained from the vicinity of Boring from the Siegriest property as needed to maintain the required amount of fines for the soil bentonite backfill mixture based on the mix design determined prior to construction. Geo-Con has indicated an import of approximately 4,400 cy from the vicinity of Boring No.'s 36 and 37 (Terracon Preliminary Geotechnical Engineering Report, Project No. 250451221, to supplement to slurry wall backfill materials. No foreign contaminants were noted during the preliminary geotechnical investigation for the Siegrist property. 12.The existing concretestockpiles on the site will be recycled and reused as structural material in the islands that are proposed in the ponds. G:\3811\3811-DMG Permit\DMG Adequacy qvw Response13811 Response Letter DMG.tloc