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RULE 4 PERFORMANCE STANDARDS <br /> g) Colowyo will place contour furrows immediately above approximately every third <br /> fabric row (approximately every 66 feet). The trial will exhibit alternating bands of <br /> modified Sagebrush Steppe mix(approximately 17 feet), fabric/containerized plantings(4- <br /> 5 feet wide), modified Sagebrush Steppe mix(approximately 17 feet), fabric/containerized <br /> plantings (4-5 feet), modified Sagebrush Steppe mix (approximately 12 feet), contour <br /> furrow (approximately 5 feet). This pattern should allow for specific emphasis on <br /> containerized plantings establishment while minimizing the risk of excessive erosion <br /> during the period of early establishment of the trial area. <br /> h) An "elk proof" exclusionary fence will be erected around the perimeter of the entire <br /> trial area to protect it from ungulates. <br /> i) As this area will not be receiving supplemental watering, in the event of stand failure <br /> the area will revert back to sagebrush steppe for purposes of Phase III bond release in the <br /> future, with the exception that the requirement for 50% of the required 375 shrubs in this <br /> area be big sagebrush (Section 4.15.8), this requirement will reasonably be dropped, due <br /> to the reduction in sagebrush seed included in the mix applied. <br /> 2) Colowyo agrees to establish one small (one acre)tall shrub establishment site that that displays <br /> a thicker topsoil condition. The location of this area will be in the immediate proximity of the <br /> South Taylor X coal pod as portrayed below and on Map 28B. The location for this trial represents <br /> elevation and aspect characteristics that are very similar to the Tall Shrub areas disturbed in the <br /> South Taylor area. Slope characteristics are more moderate than the areas disturbed, but for <br /> purposes of implementing and monitoring this trial it was determined essential that access and <br /> stability of the test location be manageable. Actual results from the trial should yield information <br /> that can be used to apply additional stability and/or sediment control measures on larger areas if <br /> this attempt is successful. <br /> a) The area will be regraded in accordance with PMT requirements. <br /> b) The area will be tested for overburden suitability as per requirements. <br /> c) At least 48 inches of topsoil will be placed to replicate common topsoil depth conditions <br /> in the surrounding area in stands of this nature. Once the topsoil has been placed, it will be <br /> cross-ripped with a dozer or by other appropriate means to ensure the material is in a loose, <br /> rough condition to encourage infiltration of rain/snowmelt and root development. <br /> d) The Sagebrush Steppe mix has been modified to reduce the volume of"low shrubs" in <br /> favor of tall shrub components of the mix. The grasses currently included in the mix were <br /> also reduced to minimize competition, while still providing some soil stabilization <br /> function. The entire trial area will be seeded with the modified Sagebrush Steppe Mix as <br /> seen below. In the event individual components of the mix are unavailable,guidance from <br /> the Division will be sought prior to implementation of the trial. Weedguard fabric or it's <br /> equivalent will be placed in rows (at intervals of approximately 22 feet) and will be used <br /> to severely reduce competition between the containerized plantings and annual weeds and <br /> grasses. Please see the "Expected Field Implementation Plan for Aspen/Tall Shrub Field <br /> Trials" illustration below. <br /> e) Containerized 2-3 foot serviceberry and chokecherry plants will utilized from the most <br /> similar source elevation available in the region. Based on the volume of containerized <br /> plants included in the trial (550), and the expectations of success, a combined number of <br /> (300) serviceberry and chokecherry plants within the trial during 2016 (from seed and live <br /> plantings) will be considered a successful demonstration of Uoloywo's ability to proceed <br /> Rule 4 Performance Standards 4-56 Revision Date: 1/22/20 <br /> Revision No.: TR-136 <br />