Environmental Assessment Peshastin and Chumstick Road Decommissioning

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Environmental Assessment Peshastin and Chumstick Road Decommissioning United States Department of Environmental Agriculture Forest Assessment Service Peshastin and Chumstick Road Decommissioning Project Wenatchee River Ranger District, Okanogan-Wenatchee National Forest Chelan County, Washington Township 25N, R17E, R18E, R19E and Township 26N, R19E and Township 21N, R18E, T22N, R18E, R17E, T23N, R18E, R17E, T24N, R17E, W.M. For information contact: Greer Maier Wenatchee River Ranger District 600 Sherbourne St. Leavenworth, WA 98826 (509) 548-2577; [email protected] http://www.fs.fed.us/r6/wenatchee/projects/nepa_project.shtml?project=35254 The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410, or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. Environmental Assessment Peshastin and Chumstick Road Decommissioning TABLE OF CONTENTS Table of Contents .......................................................................................................... 3 Summary ....................................................................................................................... 4 Chapter 1 - Introduction ............................................................................................... 5 Document Structure ..................................................................................................................... 5 Background .................................................................................................................................. 5 Desired Conditions ...................................................................................................................... 9 Purpose and Need for Action ....................................................................................................... 9 Proposed Action ........................................................................................................................ 10 Adaptive Management ............................................................................................................... 11 Decision Framework .................................................................................................................. 11 Management Direction .............................................................................................................. 12 Public Involvement and Consultation ........................................................................................ 17 Issues ......................................................................................................................................... 17 Chapter 2 - Alternatives, including the Proposed Action ......................................... 21 Alternatives ................................................................................................................................ 21 Mitigation Measures/Design Criteria ........................................................................................ 31 Comparison of Alternatives ....................................................................................................... 33 Chapter 3- Existing Condition and Environmental Consequences ......................... 35 Introduction ............................................................................................................................... 35 Soil, Watershed, Riparian, and Aquatic Resources ................................................................... 37 Wildlife Resources .................................................................................................................... 57 Botanical Resources .................................................................................................................. 65 Forest Health and Vegetation Management (Silviculture) ........................................................ 68 Fire Management ....................................................................................................................... 77 Recreation .................................................................................................................................. 83 Special Uses ............................................................................................................................... 86 Transportation ............................................................................................................................ 88 Heritage Resources .................................................................................................................... 91 Specifically Required Disclosures ............................................................................................. 93 Chapter 4 - Consultation and Coordination .............................................................. 95 Chapter 5 - References .............................................................................................. 96 APPENDIX A - Road Treatment Definitions, Photos, and Methods ....................... 108 APPENDIX B - Broadscale Trends of Management Indicator Species (MIS) ........ 110 3 Environmental Assessment Peshastin and Chumstick Road Decommissioning SUMMARY The Wenatchee River Ranger District is proposing to treat, through decommissioning or conversion to trail, 63.8 miles of U.S. Forest Service roads in the Peshastin and Chumstick watersheds over the next 7-10 years. The purpose and need for the project is the restoration of watershed health and fisheries and wildlife habitat through removal of roads that are redundant or no longer needed for management. Many of these roads are currently unmaintained, but some are currently open. The Peshastin watershed contains 336 miles of roads and road densities are greater than 2.5 mi./sq. mi. Chumstick watershed contains 281 miles with road densities over 3.6 mi./sq. mi. These roads contribute to chronic habitat degradation and have failed, or have the potential to fail in the future. Such conditions have led to watershed degradation through such impacts as chronic and landslide- induced sedimentation, habitat fragmentation, hydrologic disconnection, loss of floodplain and riparian forest, and degraded water quality. The proposed project targets roads throughout the Peshastin and Chumstick watersheds. Peshastin and Chumstick Creeks are tributaries to the Wenatchee River. Peshastin Creek enters the Wenatchee downstream of the town of Peshastin at approximately River Mile (RM) 20. Chumstick Creek enters upstream from Peshastin Creek near the town of Leavenworth (RM 23). This action is needed to: Reduce impacts to water quality and hydrologic function. Improve habitat conditions for listed salmon and trout. Reduce road density to improve terrestrial habitat connectivity. Reduce overall road maintenance costs to a level that is more in-line with current and projected funding levels. The proposed action would directly restore 155 acres of road and benefit terrestrial and aquatic habitat as well as hydrologic function in 113,560 acres of watershed to the Wenatchee River. Based upon the effects of the alternatives, the responsible official will decide whether or not to decommission roads in the Peshastin and Chumstick road systems and whether to convert roads and road segments in the Etienne road system (7322 system) to an ATV trail. 4 Environmental Assessment Peshastin and Chumstick Road Decommissioning CHAPTER 1 - INTRODUCTION Document Structure ______________________________ The Forest Service has prepared this Environmental Assessment in compliance with the National Environmental Policy Act (NEPA) and other relevant Federal and State laws and regulations. This Environmental Assessment discloses the direct, indirect, and cumulative environmental impacts that would result from the modified proposed action. The document is organized into four parts: Introduction: The section includes information on the history of the project proposal, the purpose of and need for the project, and the agency’s proposal for achieving that purpose and need. This section also details how the Forest Service informed the public of the proposal and how the public responded. Comparison of Alternatives, including the Proposed Action: This section provides a more detailed description of the agency’s proposed action as well as alternative methods for achieving the stated purpose. These alternatives were developed based on significant issues raised by the public and other agencies. This discussion also includes possible mitigation measures. Finally, this section provides a summary table of the environmental consequences associated with each alternative. Environmental Consequences: This section describes the environmental effects of implementing the proposed action and other alternatives. This analysis is organized by resource area. Within each section,
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