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Desatoya Mountains Habitat Resiliency, Health, and Restoration Project

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Desatoya Mountains Habitat Resiliency, Health, and Restoration Project Stillwater Field Office, Nevada Office, Field Stillwater FINAL ENVIRONMENTAL ASSESSMENT Desatoya Mountains Nevada Office, Field Stillwater Habitat Resiliency, Health, And Restoration Project DOI-BLM-NV-C010-2011-0513-EA U.S. Department of the Interior Bureau of Land Management Carson City District Stillwater Field Office 5665 Morgan Mill Road Carson City, NV 89701 775-885-6000 July, 2012 It is the mission of the Bureau of Land Management to sustain the health, diversity, and productivity of the public lands for the use and enjoyment of present and future generations. DOI-BLM-NV-C010-2011-0513-EA II TABLE OF CONTENTS 1.0 INTRODUCTION/PURPOSE & NEED ............................................................................................ 1 1.1 INTRODUCTION .................................................................................................................................................... 1 1.2 BACKGROUND .................................................................................................................................................... 2 1.3 PURPOSE & NEED .............................................................................................................................................. 4 1.4 LAND USE PLAN CONFORMANCE STATEMENT ................................................................................................ 5 1.5 RELATIONSHIPS TO STATUTES, REGULATIONS, AND OTHER PLANS ............................................................. 6 1.6 CONFORMANCE WITH RANGELAND HEALTH STANDARDS AND GUIDELINES BY LIVESTOCK GRAZING ALLOTMENT .............................................................................................................................................................. 7 1.7 DECISION TO BE MADE FOR THE EXCESS WILD HORSE REMOVAL ............................................................... 9 1.8 SCOPING AND IDENTIFICATION OF ISSUES ....................................................................................................... 9 2.0 PROPOSED ACTION AND ALTERNATIVES .................................................................................... 12 2.1 THE PROPOSED ACTION ................................................................................................................................. 12 Vegetation Treatments Methods.......................................................................................................................... 14 Spring/Wet Meadow Exclosure Fencing and Range Improvements ................................................................... 16 Excess Wild Horse Removal ............................................................................................................................... 18 Cold Spring Fuels Treatment .............................................................................................................................. 20 Monitoring / Adaptive Management ................................................................................................................... 21 Project Design Features ..................................................................................................................................... 22 2.2 NO ACTION ALTERNATIVE ................................................................................................................................ 22 2.3 OTHER ACTION ALTERNATIVES ...................................................................................................................... 23 2.4 ALTERNATIVES CONSIDERED BUT ELIMINATED FROM DETAILED ANALYSIS ............................................... 23 Widespread Prescribed Burning ......................................................................................................................... 23 Remove or Reduce Livestock within the HMA .................................................................................................... 23 Designate the Desatoya HMA as a “Wild Horse and Burro Range ................................................................... 23 Raising the Appropriate Management Levels for Wild Horses ........................................................................... 24 3.0 AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSEQUENCES ...................................... 25 3.1 CULTURAL RESOURCES ...................................................................................................................... 28 3.2 NATIVE AMERICAN RELIGIOUS CONCERNS ........................................................................................... 30 3.3 FISH, WILDLIFE, AND KEY HABITAT (VEGETATIVE RESOURCES) ........................................................... 30 3.4 MIGRATORY BIRDS ............................................................................................................................. 37 3.5 BLM DESIGNATED SENSITIVE SPECIES ................................................................................................ 39 3.6 INVASIVE, NON-NATIVE, AND NOXIOUS SPECIES ................................................................................... 42 3.7 LIVESTOCK GRAZING ........................................................................................................................... 45 3.8 WILD HORSES ..................................................................................................................................... 48 3.10 FIRE MANAGEMENT .......................................................................................................................... 64 3.11 WETLANDS AND RIPARIAN ................................................................................................................. 66 3.12. SOILS .............................................................................................................................................. 69 3.13 CUMULATIVE EFFECTS OVERVIEW ..................................................................................................... 73 3.14 PAST AND PRESENT ACTIONS ........................................................................................................... 73 3.15 REASONABLY FORESEEABLE FUTURE ACTIONS ................................................................................. 74 3.16 MONITORING .................................................................................................................................... 75 4.0. PERSONS, GROUPS, AND AGENCIES CONSULTED ..................................................................... 76 5.0. REFERENCES ..................................................................................................................................... 78 III 1.0 INTRODUCTION/PURPOSE & NEED 1.1 Introduction The Bureau of Land Management (BLM), Carson City District, Stillwater Field Office is proposing a landscape-scale, multi-year, integrated habitat restoration and maintenance project on BLM lands within the Desatoya Mountain Range and adjoining BLM administered lands in Churchill and Lander Counties, Nevada (See Appendix G, Map 1). The project area encompasses approximately 230,000 acres, which includes about 6% of the Clan Alpine grazing allotment (~23,400 acres) and about 99% of the Porter Canyon and Edwards Creek grazing allotments (~206,600 acres). Additionally, 192,755 acres of the Desatoya sage-grouse population management unit (PMU) (38% of the PMU), 3,091 acres of the Reese River PMU (0.2% of the PMU), 136,400 acres of the Desatoya Herd Management Area (HMA) (84% of the HMA), and 34,195 acres of the Desatoya Wilderness Study Area (WSA) (67% of the WSA) are within the project boundary (See Appendix G, Map 2). Within the project area, up to approximately 32,705 acres of ground disturbing treatments are proposed over a ten year period including pinyon/juniper removal and thinning; wet meadow and spring rehabilitation/protection (includes fencing, pipelines, and troughs); rabbitbrush control using mowing followed by herbicide treatment and reseeding; a site-specific fuels treatment utilizing prescribed fire, herbicide, and seeding; and continuous excess wild horse removal (including utilizing water/bait trapping methods). Additionally, researchers at the University of Nevada Reno (UNR) have set up a long term experimental watershed on private land within Porter Canyon to measure the hydrologic changes associated with pinyon/juniper tree removal. Portions of the UNR experiment would be expanded to BLM lands within Porter and Dalton Canyons (See Appendix G Map 3). Specific details are described in the Proposed Action. Table 1. Legal description of the Project area (Also See Maps 1& 3 Appendix G). Township Range Section (s) Principal Meridian 17 38 1-5, 9-15 Mount Diablo Meridian 17 39 5-9, 18 Mount Diablo Meridian 18 37 9, 16-17, 20-21 Mount Diablo Meridian 18 38 1-4, 9-14, 22-27, 32-36 Mount Diablo Meridian 18 39 3-10, 17-18, 20, 29-32 Mount Diablo Meridian 19 38 26-27, 34-36 Mount Diablo Meridian 19 39 10-12, 13-16, 21-24, 31-34 Mount Diablo Meridian The Desatoya Herd Management Area (HMA) is situated within the administrative jurisdiction of the BLM Carson City and Battle Mountain District Offices. The BLM proposes to reduce the existing population to within the appropriate management level (AML) range through the use of helicopter drive-trapping and bait/water trapping. As part of proposed population management within the HMA, the BLM is proposing to enter into a cooperative agreement with Smith Creek Ranch LLC in which permanent or semi-permanent corrals would be
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