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1.2 Background and Standards for Success Portions of the Cameo RDA's No. 1 and No. 2 were initially seeded in July and December of 1994 with subsequent seeding efforts on the remaining areas in April, 2002. The 1994 revegetated portions of CRDA No. 1 and No. 2 were estimated at 12.1 and 12.0 acres, respectively, with about 14.8 and 20.2 acres revegetated in 2002, respectively. The South Fan Area is comprised of a little more than an acre of moderately sloping revegetation that has a predominately western aspect. This area (East unit and West Borrow unit) was graded, seeded and mulched in the fall of 2000. The 2 West Portals Area is comprised of four small units that total less than an acre. These are areas of gentle to moderately sloping revegetation that have a predominately western aspect and were graded, seeded and mulched in the fall of 2000 (with one of the four areas completed in the fall of 2001). Two of the four areas were reseeded in October 2005 (see Map 3). Approximately 2.5 acres of the Cameo Borrow Area No.l was hydro- seeded in 1994 with Seed Mix 10 and another 0.2 acres were seeded in April of 2002 with Seed Mix 13 Upland. The North Decline Mine Dewatering System, Cameo Borrow Area No.2, and Cameo Topsoil Piles were hydro-seeded in April of 2002 with Seed Mix 13 Upland. In November of 2002, Seed Mix 13 Upland was used to: 1) hand-seed the Substation B area; 2) hydro-seed the Roadside RDA and Roadside South Portal Upper Diversion Ditch; and 3) drill-seed the North Portal Facilities and Roadside Refuse Borrow Area. The UTL-Conveyor area was drill seeded in July of 2003 with Seed Mix 8 lowland. The revegetation history of Snowcap areas is summarized on the table on the following page. Seed mixes for revegetadon in this document (Tables SM1- SM4) are located near the end of Appendix A. According to permit documents, the diversity success criteria that were initially established for this mine were as follows: • One perennial cool season grass species with >3% relative cover. • Total perennial warm season grass species >_ 3% relative cover. • Total perennial forb species >_ 3% relative cover. No reclaimed area shall have a single species that represents > 40% relative cover. Snowcap evaluated the species diversity success standard during 2001. Per Cedar Creek's recommendations from that evaluation and consultations with the Colorado Division of Minerals and Geology (CDMG), new species diversity success standards were adopted. They are as follows: Total perennial cool season grass species relative cover ?0.5%. Total perennial warm season grass species relative cover ?2.0%. • Total perennial forb and suffrutescent (sub-shrub) species relative cover ?0.5%. No reclaimed area shall have a single species that represents >70% relative cover. CEDAR CREEK ASSOCIATES, INC. Page 2 SNOWCAP COAL COMPANY Revegetation Evaluation - 2006