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t <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />r <br />r� <br />1 <br />1 <br />IRIS <br />MITIGATION AND DESIGN, INC. <br />Environmental Consulting <br />Mitigation Area Summary <br />IRIS MITIGATION AND DESIGN, INC. <br />2022 Arapahoe Street <br />Golden, Colorado 80401 <br />Phone: 720- 272 -1985 <br />bleisure @irismitigation.com <br />In summary, the seeded mitigation areas were heavily damaged by the 2013 Flood. These <br />areas are slowly rebounding and have an average of 42 percent vegetation cover in 2014 (see <br />Tables 4 and 5). Areas 1, 4 and 5 may need some reseeding /mulching during the summer of <br />2015 or at the end of Phase 2 construction. Areas 2 and 6 have good vegetation establishment, <br />and Area 3 was never seeded and has good upland plant establishment. All areas will be <br />monitored for weeds during the 2015 growing season and will have follow -up weed control as <br />needed. <br />Ten 3 -Meter Square Plots <br />IRIS has been monitoring tree and shrub health along the Creek within ten 3 -meter square plots <br />as part of the 2011 BA requirements. IRIS has been collecting monthly data downstream of the <br />cutoff wall since July 2012. Data are collected because of the diversion of the Creek through <br />the 18 -inch pipe adjacent to the Creek, and its effect on overall riparian vegetation health. An <br />irrigation system was installed in 2012 to irrigate this stretch of creek. The irrigation system can <br />only operate when there is water flowing in the Creek, which usually runs dry in May or June <br />such that there is no surface flow for a period of several months. This irrigation system was <br />completely destroyed by the Flood. <br />After the 2013 Flood, IRIS collected data at each of the ten plots in 2013 (see Table 6). Four of <br />the ten plots had no vegetation left, as extreme erosion and depositional activity had scoured <br />out the area and deposited rock and cobble in place of where vegetation had been. Four of the <br />Schwartzwalder Mine Phase 1 — 2014 Second Annual Mitigation Monitoring Report Page 8 <br />March 2015 <br />