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Northfield Permit Application October 1 Q 2007 3 • Demonstrate the management of the reference area will be under the permittee's control and will remain under the permittee's control for the duration of the liability period. • The size of the reference area. • Management of the reference area • Will fencing be required? • Please note that during any yeaz when vegetation sampling related to a bond release application is conducted by the permittee, the reference azea and revegetated area shall receive the same management. A statement to this effect should be included in the permit narrative. Section 2.05.4 also needs to address the requirements of Rule 4.15.7(4) describing the primary methods by which the reference are will be utilized to determine revegetation success. For example, will NP be using a weighted average between the reference azea and the revegetated area? If so please include the acreage associated with the pre-disturbed pinyon-grassland and the disturbed community. Please update Section 2.05.4 accordingly. NP plans to apply the same methods and techniques used in the baseline inventory for determining revegetation success for cover, production and woody plant density. This adequately addresses the requirements for 4.15.8. NP provided a good discussion of the species diversity in the areas to be disturbed and also in the reference areas, but a species diversity standard was not proposed. Based on the data presented, and also considering the reclamation goals, the Division suggests the species diversity standard include: at least two native warm season grasses with a minimum of 5% relative cover, one native cool season grass with at least 5% relative cover, one native forb with at least 4% percent relative cover and one native shrub/tree species with 3% percent relative cover. Please include a proposed species diversity standard, based on the data in Exhibit J, in Section 2.05.4 of the permit. 26a. Rule 4.15.1(5) requires a Weed Management Plan. Species to be controlled include the weeds from the State Noxious Weed List A (http://www.colorado. Qov/cs/Satellite?c=Pace&cid=1174084048733&oagename=Aericul tore-Main%2FCDAGLavout) and those species included on the Fremont County list (http://www.a~state.co.us/Noxious Weed/counties/Fremont.html). Please provide a weed management plan in Section 2.05.4 of the permit. Rule 4.15 - Revegetation 29. NP has provided a good discussion of sampling methods and statistical demonstrations required by Rule 4.15.11 in Exhibit J. As discussed above, a summary of the methods and successful statistical demonstrations should be included in Section 2.05.4 of the permit with reference to Exhibit J.