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USGS Volcanic Monitoring Stations in the Mt. Hood Wilderness Preliminary Assessment

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USGS Volcanic Monitoring Stations in the Mt. Hood Wilderness Preliminary Assessment United States Department of Agriculture USGS Volcanic Monitoring Stations in the Mt. Hood Wilderness Preliminary Assessment Forest Mt. Hood National Zigzag and Hood River July 2016 Service Forest Ranger Districts For More Information Contact: MaryEllen Fitzgerald, Special Uses Program Manager Mt. Hood National Forest 16400 Champion Way Sandy, OR 97055 (503) 668-1429 Cover photo: Proposed location for gas instrumentation on the north side of Crater Rock, Mt. Hood In accordance with Federal civil rights law and U.S. Department of Agriculture (USDA) civil rights regulations and policies, the USDA, its Agencies, offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, family/parental status, income derived from a public assistance program, political beliefs, or reprisal or retaliation for prior civil rights activity, in any program or activity conducted or funded by USDA (not all bases apply to all programs). Remedies and complaint filing deadlines vary by program or incident. Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the responsible Agency or USDA’s TARGET Center at (202) 720-2600 (voice and TTY) or contact USDA through the Federal Relay Service at (800) 877-8339. Additionally, program information may be made available in languages other than English. To file a program discrimination complaint, complete the USDA Program Discrimination Complaint Form, AD-3027, found online at http://www.ascr.usda.gov/complaint_filing_cust.html and at any USDA office or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call (866) 632-9992. Submit your completed form or letter to USDA by: (1) mail: U.S. Department of Agriculture, Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410; (2) fax: (202) 690-7442; or (3) email: [email protected]. USDA is an equal opportunity provider, employer and lender. Preliminary Assessment Contents Chapter 1 – Introduction ......................................................................................................................... 1 1-1 Document Structure ................................................................................................................ 1 1-2 Location of the Proposed Project Area ................................................................................... 3 1-3 Background ............................................................................................................................ 3 1-4 Purpose and Need for Action ................................................................................................. 4 1-5 Management Direction ........................................................................................................... 4 National Forest Management Act ................................................................................................... 4 Stafford Act .................................................................................................................................... 5 Wilderness Act ............................................................................................................................... 5 1-6 Decision Framework .............................................................................................................. 5 1-7 Public Involvement ................................................................................................................. 6 1-8 Issues ...................................................................................................................................... 6 Chapter 2 – Proposed Action and Alternatives ...................................................................................... 7 2-1 No-action Alternative ............................................................................................................. 7 2-2 Proposed Action Alternative .................................................................................................. 7 Proposed Locations ........................................................................................................................ 8 Proposed Equipment and Installation ........................................................................................... 15 Forest Plan Amendment #20 ........................................................................................................ 18 Wilderness Act Consistency ......................................................................................................... 19 2-3 Project Design Criteria and Mitigation Measures ................................................................ 21 2-4 Alternatives Considered, but Eliminated from Detailed Study ............................................ 21 Locating Monitoring Stations Outside of Wilderness .................................................................. 21 Installing Fewer Monitoring Stations in Wilderness .................................................................... 22 Chapter 3 – Environmental Impacts of the Proposed Action and Alternatives .................................... 23 3-1 Wilderness, Recreation and Visual Quality .......................................................................... 23 Analysis Assumptions and Methodology ..................................................................................... 24 Existing Conditions ...................................................................................................................... 25 Effects Analysis ............................................................................................................................ 33 Consistency Determination .......................................................................................................... 39 3-2 Wildlife ................................................................................................................................. 41 Analysis Assumptions and Methodology ..................................................................................... 42 Existing Conditions ...................................................................................................................... 42 Effects Analysis for All Alternatives............................................................................................ 42 Consistency Determination .......................................................................................................... 56 3-3 Water Quality ....................................................................................................................... 56 Analysis Assumptions and Methodology ..................................................................................... 56 Existing Conditions ...................................................................................................................... 58 Effects Analysis ............................................................................................................................ 63 Consistency Determination .......................................................................................................... 70 3-4 Fisheries ................................................................................................................................ 77 Analysis Assumptions and Methodology ..................................................................................... 78 Existing Conditions ...................................................................................................................... 79 Affected Environment/Action Area ............................................................................................. 79 Effects Analysis for All Alternatives............................................................................................ 84 Effects Determination/Summary of Effects ................................................................................. 85 Consistency Determination .......................................................................................................... 87 3-5 Botany .................................................................................................................................. 87 Analysis Assumptions and Methodology ..................................................................................... 87 Mt. Hood National Forest i USGS Volcanic Monitoring Stations Existing Conditions ...................................................................................................................... 91 Effects Analysis ........................................................................................................................... 94 Effects Determination .................................................................................................................. 96 Consistency Determination .......................................................................................................... 96 3-6 Invasive Plant Species .......................................................................................................... 98 Analysis Assumptions
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