Environmental Assessment Questar Main Line 3 United States Department of Weber Canyon Agriculture Replacement Project
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Environmental Assessment Questar Main Line 3 United States Department of Weber Canyon Agriculture Replacement Project U.S. Forest Davis and Morgan Counties, Utah Service Salt Lake Ranger District, Uinta-Wasatch-Cache National Forest September 2013 Prepared with the assistance of: Tetra Tech, Inc., Salt Lake City, Utah For Information Contact: Anne Hansen 857 West South Jordan Parkway South Jordan, UT 84095 [email protected] (801) 999-2158 The United States 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, DC 20250-9410, or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. Environmental Assessment: Questar Main Line 3 Weber Canyon Replacement Project Table Of Contents 1.0 PURPOSE AND NEED ................................................................................................................ 1 1.1 Introduction......................................................................................................................... 1 1.2 Summary of Proposed Action............................................................................................. 1 1.3 Purpose and Need ............................................................................................................... 2 1.4 Decisions to Be Made......................................................................................................... 2 1.5 Planning Guidance.............................................................................................................. 3 1.5.1 Forest Plan ..........................................................................................................................3 1.5.2 Other Planning Guidance....................................................................................................3 1.6 Scoping and Issue Identification......................................................................................... 3 1.6.1 Issues to Be Analyzed in Depth..........................................................................................4 1.6.2 Issues Considered but not Analyzed in Depth ....................................................................4 1.7 Required Permits and Authorizations ................................................................................. 6 2.0 PROPOSED ACTION AND ALTERNATIVES....................................................................... 11 2.1 Introduction....................................................................................................................... 11 2.2 Alternative Formulation.................................................................................................... 11 2.3 Alternatives Analyzed in Depth........................................................................................ 11 2.3.1 Alternative 1 – Proposed Action.......................................................................................11 2.3.2 Alternative 2 – No Action.................................................................................................15 2.4 Alternatives Considered but Not Analyzed in Depth........................................................ 16 2.5 Summary and Comparison of Environmental Effects ...................................................... 16 3.0 AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSENQUENCES .............. 25 3.1 Introduction....................................................................................................................... 25 3.2 Project Area General Description ..................................................................................... 26 3.3 Disturbance Types and Areas ........................................................................................... 27 3.4 Vegetation Resources ....................................................................................................... 27 3.4.1 Scope of Analysis .............................................................................................................27 3.4.2 Affected Environment and Environmental Consequences................................................28 3.5 Geology and Soil Resources ............................................................................................. 33 3.5.1 Scope of Analysis .............................................................................................................33 3.5.2 Affected Environment and Environmental Consequences................................................33 3.6 Water Resources ............................................................................................................... 40 3.6.1 Scope of Analysis .............................................................................................................40 3.6.2 Affected Environment and Environmental Consequences................................................41 3.7 Fish and Wildlife Resources ............................................................................................. 45 3.7.1 Scope of Analysis .............................................................................................................45 3.7.2 Affected Environment and Environmental Consequences................................................46 3.8 Archaeological, Cultural and Historic Resources............................................................. 63 3.8.1 Scope of Analysis .............................................................................................................63 3.8.2 Affected Environment and Environmental Consequences................................................63 3.9 Air Quality ........................................................................................................................ 65 i Environmental Assessment: Questar Main Line 3 Weber Canyon Replacement Project 3.9.1 Scope of Analysis .............................................................................................................66 3.9.2 Affected Environment and Environmental Consequences................................................66 3.10 Public Health and Safety................................................................................................... 68 3.10.1 Scope of Analysis .............................................................................................................68 3.10.2 Affected Environment and Environmental Consequences................................................69 3.11 Scenic Resources .............................................................................................................. 74 3.11.1 Scope of Analysis .............................................................................................................74 3.11.2 Affected Environment and Environmental Consequences................................................74 4.0 CONSULTATION AND COORDINATION ............................................................................ 78 4.1 Introduction....................................................................................................................... 78 4.2 Public Scoping .................................................................................................................. 78 4.3 Federal, State, and Local Agencies................................................................................... 78 4.3.1 Others................................................................................................................................78 4.3.2 List of Preparers................................................................................................................78 5.0 REFERENCES CITED............................................................................................................... 80 LIST OF TABLES Table 1-1. Other permits, approvals, and consultations that may be required for implementation of the Proposed Action............................................................................................................................................ 6 Table 2-1. Summary and Comparison of Environmental Effects............................................................. 16 Table 2-2. Project Design Features/Mitigation Measures to Minimize Effects/Impacts to Resources..... 21 Table 3-1. Disturbance Types and Areas.................................................................................................. 27 Table 3-2. Forest Service Region 4 Sensitive Plant Species and WCNF Watch List Plant Species Considered for Detailed Analysis ............................................................................................................... 30 Table 3-3. Noxious Weed Species Occurring in the Proposed Project Area and Species Status at the State Class and Forest Service Category Levels........................................................................................