USFS Environmental Assessment
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United States Department of Agriculture Forest Service Chewuch River Restoration River Miles 13-15.5 Environmental Assessment Methow Valley Ranger District, Okanogan-Wenatchee National Forest, Okanogan County, Washington May 2015 Photo of the Chewuch River by Barbara Jackson, Landscape Architect, USDA Forest Service Chewuch River Restoration – RM 13-15.5 For More Information Contact: Michael Liu Methow Valley District Ranger 24 West Chewuch Road Winthrop, WA 98862 Phone: 509-996-4000 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.) 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Chewuch River Restoration – RM 13-15.5 Contents Contents ............................................................................................................................................ i Introduction ..................................................................................................................................... 2 Proposed Project Location .......................................................................................................... 2 Background ................................................................................................................................. 4 Need for the Proposal ...................................................................................................................... 4 Public Involvement and Tribal Consultation ................................................................................... 5 Relevant Issues ................................................................................................................................ 6 Issues Considered but dismissed ................................................................................................. 7 Proposed Action and Alternatives ................................................................................................... 7 Alternative Formulation .............................................................................................................. 7 Alternatives Considered but Dismissed from Detailed Analysis ................................................ 7 No Action Alternative ................................................................................................................. 8 Proposed Action .......................................................................................................................... 8 Comparison of Alternatives ...................................................................................................... 13 Degree to Which the Purpose and Need for Action is Met ................................................... 13 Degree to Which the Alternatives Address the Issues ........................................................... 14 Environmental Impacts of the Proposed Action and Alternatives................................................. 17 Botany ....................................................................................................................................... 17 Regulatory Framework .......................................................................................................... 17 Affected Environment and Environmental Consequences .................................................... 18 Environmental Consequences ............................................................................................... 21 Cultural Resources .................................................................................................................... 27 Regulatory Framework .......................................................................................................... 28 Affected Environment and Environmental Consequences .................................................... 29 Environmental Consequences ............................................................................................... 32 Other Relevant Mandatory Disclosures ................................................................................. 34 Invasives.................................................................................................................................... 34 Regulatory Framework .......................................................................................................... 34 Affected Environment and Environmental Consequences .................................................... 35 Environmental Consequences ............................................................................................... 37 Water Resources ....................................................................................................................... 40 Regulatory Framework .......................................................................................................... 40 Affected Environment and Environmental Consequences .................................................... 42 Environmental Consequences ............................................................................................... 51 Wild and Scenic Rivers (Recreation and Scenery) ................................................................... 61 Regulatory Framework .......................................................................................................... 61 Affected Environment and Environmental Consequences .................................................... 62 Environmental Consequences ............................................................................................... 69 Wildlife ..................................................................................................................................... 86 Regulatory Framework .......................................................................................................... 86 Affected Environment and Environmental Consequences .................................................... 87 Environmental Consequences ............................................................................................... 92 References ....................................................................................................................................... 1 i Methow Valley Ranger District, Okanogan-Wenatchee National Forest Introduction The Methow Valley Ranger District, in partnership with the Yakama Nation, propose to re- establish, enhance and improve the diversity of aquatic habitat for Endangered Species Act listed fish in the 13-15.5 mile reach of the Chewuch River. These actions are proposed to be implemented on the Methow Valley Ranger District of the Okanogan-Wenatchee National Forest. This environmental assessment (EA) was prepared to determine the effects of increasing large wood quantities, pool frequency and quality and re-establishing side- and off-channel habitat in the 13-15.5 mile reach of the Chewuch River and whether it significantly affects the quality of the human environment and thereby require the preparation of an environmental impact statement. Preparing this EA fulfills agency policy and direction to comply with the National Environmental Policy Act (NEPA). Details of the proposed action are in the Proposed Action and Alternatives section of this document beginning on page 11. On March 27, 2013, a final rule revising 36 CFR Part 218 was published in the Federal Register Volume 78, No. 59. The new rule replaces the previous appeal rules defined in 36 CFR 215, and expands the use of the pre-decisional objection process. The new rule provides the public an opportunity to comment and express concerns on projects before decisions are made, rather than after. This project is subject to the new pre-decisional objection regulations. Proposed Project Location As shown in Figure 1, the project is north of Winthrop, Washington at Chewuch River miles 13 to 15.5. It includes construction of features at 12 sites on National Forest Land along the River (Sites 14A, 14B, 14C, 14D, 14E, 14H, 14I, 14L, 14N, 14O, 14P and 14Q). The proposed project is not within an inventoried roadless area, wilderness or other congressionally designated area, nor is it within potential wilderness. Site 14B begins on National Forest lands but is mostly situated on Washington State Department of Fish and Wildlife (WDFW) managed lands. While the design for site 14B (on WDFW managed lands) is not finalized, the project is considered a connected action for purposes of this analysis. Effects of implementing the entire project, including the connected actions on WDFW lands, are analyzed in this document. The U.S. Forest Service would only make a decision on the portion within Agency jurisdiction. Implementation of site 14B is dependent upon a decision from each agency. 2 Chewuch River Restoration