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Vantage to Pomona Heights Chapter 4 230 kV Transmission Line Project FEIS Environmental Consequences PAGE 4-3 impacts, but may not reduce impacts from a high to a moderate level or from a moderate to a low level. Mitigation measures would not be applied to low level impacts. What constitutes a low, moderate, or high impact on a resource varies by resource as are the assumptions for analysis for each resource. 4.1.1.3 Identify Protection Measures Required Design Features (RDFs) and environmental protection measures described in Chapter 2 (Section 2.3) were incorporated into the Project design and would be implemented during construction and operation of the proposed Project. The measures were designed to avoid or minimize environmental impacts from Project construction, operation, and maintenance activities. These are items that Pacific Power would be required to implement as part of the Project development. The RDFs were developed in an iterative process that involved conducting the impact analysis and then adding standard operating procedures, environmental protection measures, and best management practices to the proposed Project and alternatives as RDFs to address identified impacts. 4.1.1.4 Residual Impacts Residual impacts are the environmental effects that remain after mitigation measures are applied. The locations of potential residual impacts were identified if possible. The intensities of such potential residual impacts anticipated to occur from implementation of an Action Alternative along the reference centerline were assessed and discussed in the residual impacts discussion for each resource. In certain cases, mitigation measures were identified following the impact assessment to reduce or minimize residual impacts. Mitigation measures were developed in collaboration with the Bureau of Land Management (BLM) and cooperating agencies. Prior to construction of the proposed Project, the Proponent would coordinate the implementation of mitigation with the BLM, other cooperating agencies, and landowners at specific locations. A Framework for Development of a Sage-Grouse Compensatory Mitigation Plan (Mitigation Framework) has been developed and is included in Appendix B-6. This Mitigation Framework was developed to compensate for residual impacts from the proposed Project to Sage-Grouse.