Environmental Assessment Maah Daah Hey Ii Trail
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United States Department of Agriculture Forest Service Region 1 Dakota Prairie ENVIRONMENTAL Grasslands ASSESSMENT FOR THE MAAH DAAH HEY II TRAIL EXTENSION August 2006 Data Accuracy - The Forest Service uses the most current and complete data available. GIS data and product accuracy may vary. They may be developed from sources of differing accuracy, accurate only at certain scales, based on modeling or interpretation, incomplete while being created or revised, etc. Using GIS products for purposes other than those for which they were created may yield inaccurate or misleading results. The Forest Service reserves the right to correct, update, modify, or replace GIS products without notification. For more information, contact: Dakota Prairie Grasslands, 240 W. Century Ave, Bismarck, ND 58503; (701) 250-4443. 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. To file a complaint of discrimination, write: USDA, Director, Office of Civil Rights, Room 326, W. Whitten Building, 1400 Independence Ave. SW, Washington, D.C. 20250-9410, or call (202) 720-5964 (voice and TDD). The USDA is an equal opportunity provider and employer. ENVIRONMENTAL ASSESSMENT for the MAAH DAAH HEY II PROJECT Billings and Slope Counties, North Dakota USDA FOREST SERVICE DAKOTA PRAIRIE GRASSLANDS MEDORA RANGER DISTRICT Responsible Official: Ronald W. Jablonski, Jr. Medora District Ranger 161 21st Street W Dickinson, ND 58601-3135 For Further Information Contact: Jeff Adams, Team Leader 161 21st Street W Dickinson, ND 58601-3135 (701) 225-5151 Table of Contents Summary......................................................................................................................................... i Chapter 1 Purpose of and Need for Action ............................................................................1-1 Proposed Action........................................................................................................................1-1 Purpose and Need .....................................................................................................................1-2 Project Development........................................................................................................1-5 Project Area Location......................................................................................................1-6 Relationship to the Dakota Prairie Grasslands Management Plan ...........................................1-6 Levels of Decisions ..........................................................................................................1-6 DPG Plan Direction ........................................................................................................1-7 Decision to Be Made........................................................................................................1-8 Chapter 2 Alternatives ..............................................................................................................2-1 Introduction...............................................................................................................................2-1 Process Used to Formulate Alternatives...................................................................................2-1 Public Involvement...................................................................................................................2-1 Refining the Proposed Action...................................................................................................2-6 Alternative Descriptions ...........................................................................................................2-7 Alternative Evaluation Process........................................................................................2-7 Alternatives Considered in Detail....................................................................................2-8 Design Criteria ..............................................................................................................2-11 Alternatives Considered but Dropped From Analysis...................................................2-13 Comparison of Alternatives ...........................................................................................2-15 Chapter 3 Affected Environment and Environmental Consequences .................................3-1 Introduction...............................................................................................................................3-1 Recreation .................................................................................................................................3-2 Wildlife ...................................................................................................................................3-17 Botany.....................................................................................................................................3-25 Soil and Water Resources.......................................................................................................3-32 Cultural Resources..................................................................................................................3-36 Compliance with the DPG Plan and Other Regulatory Direction ..........................................3-38 Irreversible and Irretrievable ..................................................................................................3-40 References...............................................................................................................................3-41 Chapter 4 Consultation and Coordination.............................................................................4-1 Appendix A – Alternative maps List of Figures and Tables Figure 1-1. Project vicinity map. ................................................................................................1-3 Figure 1-2. Alternative trail routes considered in detail. ............................................................1-4 Figure 2-1. Key areas within MA 3.51 “Bighorn Sheep Habitat”..............................................2-6 Figure 2-2. Map of action alternatives: B, E, and H (Proposed Action)...................................2-11 Table 2-1. Summary of alternative response to Purpose and Need. .........................................2-15 Table 2-2. Summary of alternative’s response to key issues....................................................2-15 Table 3-1. Past, present, and reasonably foreseeable future actions considered in the cumulative effects analysis for the Maah Daah Hey II Trail extension.....................3-1 Table 3-2. ROS categories and definitions. .................................................................................3-4 Table 3-3. ROS areas affected by the action alternatives. ...........................................................3-5 Table 3-4. Scenic integrity levels in the Maah Daah Hey Trail II analysis area. .......................3-6 Table 3-5. Definitions of wilderness characteristics...................................................................3-7 Table 3-6. Direct and indirect effects of the proposed action on roadless characteristics..........3-9 Table3-7. Effects of Alternative H on the four aspects of recreation experience.....................3-11 Table 3-8. Direct and indirect effects of the Alternative B on roadless characteristics............3-14 Table 3-9. Direct and indirect effects from Alternative B on recreation experience................3-14 Table 3-10. Direct and indirect effects of Alternative E on roadless characteristics................3-15 Table 3-11. Direct and indirect effects from Alternative E on recreation experience..............3-16 Table 3-12. Species dropped from further analysis and rationale for their exclusion. .............3-17 Table 3-13. Species carried forward in the analysis. ................................................................3-19 Table 3-14. Summary of effects to bighorn sheep and raptors by alternative. .........................3-24 Table 3-15. Sensitive species occurring in the analysis area for the proposed Maah Daah Hey 2 Trail extension. ....................................................................................3-25 Table 3-16. DPG Plan direction applicable to soil and water resources...................................3-32 Table 3-17. Inventoried cultural properties in the Maah Daah Hey Trail II analysis area.......................................................................................................................3-36 Table 3-18. Compliance with DPG Plan direction by alternative. ...........................................3-39 i Summary Summary