Laserfiche WebLink
• Kentudry bluegrass, and Siberian wheatgrass with 17.5%, 10.0%, 3.6%, 3.2%, and 3.1% average <br />ground wver, respectively. <br />2.7.2 1999 Revegetal5on <br />(3rarts 10 and it and Tables 12 and 13 exhibit the average cover and composition of vegetation <br />found on the five units (EP034, EP035, WP007, 516016, and 516017) that were four years of age when <br />evaluated in 2003. These units exhibit mixed results in their progress toward bond release criteria. <br />Perennial cover ranges from 11.3% tb 41.3%, with four of the five units passing 2002's cover success <br />criteria of 19% herbaceous cover. However, since 2003 was a wetter year than 2002, it's possible that <br />more of these units would have failed. Unit EP035 fails this criteria regardless of year, and will likely not <br />meet this standard in the coming years unless the annual brome populations are reduced to non- <br />competitive levels (<10°k cover). The use of the herbicde Oust or Plateau for control of annual bromes is <br />recommended throughout EP035, while further monitoring and possible spot treatment in EP034 and <br />516017 is also recommended. Woody plant densities in the 1999 revegetation units ranges from 30 to <br />737 woody plants per acre, which are below the present standard of 90% of 1,000 woody stems per <br />acre. See Appendix AA -Section 7.4 for a discussion on options and recommendations with regard to <br />• woody plant density. Dominant taxa in the 1999 revegetation are cheatgrass, slender wheatgrass, <br />Kentucky bluegrass, Japanese brome, and Siberian wheatgrass with 16.9%, 4.1%, 3.9%, 3.8%, and <br />3.1% average ground cover, respectvely. <br />2.7.3 2001 Revegetat5on <br />Charts 12 and 13 and Tables 14 and 15 exhibit the average cover and composition of vegetation <br />found on the four units (EP038, WP009, WP010, and WPOll) that were two years of age when evaluated <br />in 2003. These units have generally exhibited both exped~d and positive results in their progress toward <br />bond release criteria with perennial cover ranging from 4.5°k th 10.9%. Annual brome levels are <br />presently low in all of these units, but expansion of these populations is possible and should be monitored <br />dosety. Woody plant densities in the 2001 revegetation units ranges from 8 to 264 woody plants per <br />acre, which are respectable numbers wnsidering the young age of these units. Dominant taxa in the <br />1999 revegetation are Russian thistle, field pennycress, Siberian wheatgrass, mountain brome, and <br />slender wheatgrass with 21.4%, 21.0%, 1.3%, 1.3%, and 1.1% average ground cover, respectively. The <br />non-invasive annuals, Russian thistle and field pennycress will quickly disappear in the next few years <br />when the elevated soil nutrient availability diminishes. <br />r~ <br />LJ <br />~cennecon ~av co. i cao..yo rwne Page 80 Revegetation Monnortng -Zoos <br />