Laserfiche WebLink
May 2005 Hayden Gukb Mixe 2004 Anxua! Re~%maNox Report ~ Page 3 <br />mixture used for the 1998 seeding is presented in Exhibit 2 on Table 3. That portion of <br />the slump area parcel that was not disturbed during the stabilization work in 1998 <br />(approximately 0.89 acres) was seeded for herbaceous cover in 1987. This seed mixture is <br />shown of Table 1 of Exhibit 2. <br />In April, 1996, the CDMG issued its proposed decision to approve Technical Revision <br />No. 62 (TR-62). TR-62 revised the shrub density standazd for the reclamation area to 200 <br />stems per acre, and added three shrub enclosures with an overall shrub density standard of <br />750 stems per acre. The CDMG noted in a letter of February 20, 1996, that "The <br />additional disturbance in the shrub enhancement areas will be considered restricted <br />transplanting of native species in accordance with Rule 4.15.7(5)." In addition, the <br />CDMG noted "The reclamation liability period will be extended for an additional five <br />years from the date of planting in the shrub enhancement aeeas." During May and June <br />1996, Pazcels 003, HG-8 and E were planted with approximately 6,388 woody stems <br />consisting of willow, dogwood, cottonwood, Woods rose, currantbeny, buffaloberry, <br />chokecherry, serviceberry, fendlera, Douglas hawthorn, snowbeny, cinquefoil, and <br />shrubby cinquefoil. In addition, approximately 1,200 Gambel's oak acorns were planted. <br />In 1997, an additional 930 cun•antberry and 578 Woods rose were planted to supplement <br />the stem counts in the Pazcel E and HG-8 shrub aeeas. <br />Woody stem counts of the three shrub enclosures were conducted in 1997, 1998, 1999, <br />200], 2002 and 2003. The shrub density in the pazcels was greater than 500 stems per <br />acre during each year. <br />2.2 2004 VEGETATION MONITORING <br />Quantitative sampling of the permit area was undertaken in August 2004 by ESCO Associates to <br />document successful establishment of revegetation in accordance with Rule 4.15.7. A sampling <br />plan was submitted to the CDMG and approved prior to initiation of field work. The sampling <br />plan is presented in Exhibit 3. <br />A summary of the 2004 data, which is the first year of two years of data for final reclamation, is <br />summarized below. Results of the 2004 sampling aze presented in Exhibit 4. <br />2.2.1 Cover <br />The performance standazd for total herbaceous cover is 90 percent of the reference azea sample <br />mean. The calculated standard was 47.1 percent. Pazcels 003, HG-8 and E all exceeded this <br />value, while the Slump Area cover (42 percent) was slightly less than the standazd. <br />2.2.2 Woody Plant Density <br />The overall average woody plant density of Parcels 003, HG-8 and E (2,751 stems per acres) <br />exceeded the performance standard of 750 stems per acre. <br />2.2.3 Species Diversity <br />The species density standazd is 90 percent of the reference azea mean, which was 13.8 species per <br />100 square meter. All four parcels exceeded this value. It is notable that the highest species <br />density value {23 species per 100 square meter) was observed in the Slump Area were the cover <br />value was slightly less than the cover performance standazd. This underscores the inverse <br />Hydro-Enviuonmental Solutions, Inc. <br />P.O. Box772996 <br />Steamboat Speingr, CO 80477 <br />970-8716725 <br />