West Mojave Plan FEIR/S - Desert Managers Group

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Distribution of Live Tortoises Observed Relative toHigher Density Sign Count AreasI n y o C oN17814K e r n C o3951558S a n B e r n a r d i n o C o401566138L o s A n g e l e s C o18LegendCounty LinesHighwaysPlan BoundaryMilitary LandsProposed DWMAsHigher Density TCS AreasLive Tortoises ObservedAdultsSubadults247R i v e r s i d e C o6210/14/04West Mojave Plan FEIR/SMap 3-9Scale: 1 : 1,350,0000 10 20 30Km0 10 20 30Miles
Regional Declines in the Four DWMAs: In comparing the earliest survey efforts withlater ones, it appears that there have been substantial declines in tortoise numbers in thenorthwest portion of the Fremont-Kramer DWMA. This area is bounded by Highway 58 to thesouth, Red Mountain to the north, Fremont Peak to the east, and the DTNA to the west. Itencompasses the three DTNA study plots and those at Fremont Peak and Fremont Valley, whereDr. Berry documented tortoise declines ranging from 93% at Fremont Peak to 72% at theFremont Valley study plot. No above-average tortoise sign polygons were identified anywherewithin this region. Although there were a few transects with above-average tortoise sign, thesewere insufficiently concentrated for the polygon criteria to be met.The analysis found above-average tortoise sign polygons to be oriented on a northeast-tosouthwestaxis, from about Fort Irwin to the northeast to areas south-southeast of Edwards AirForce Base (Map 3-8) in areas identified as having above-average tortoise sign; the JohnsonValley plot is east of this area. It is noteworthy that the Kramer Hills, Lucerne Valley, andStoddard Valley study plots showed the smallest population declines during the 10 to 15 yearsthey were surveyed (1996 Berry Memorandum), and are included in three regions that currentlysupport higher sign count areas.3.3.2.4.3 Desert Tortoise DistributionRevised Tortoise Range Map: Survey data were used to produce an updated tortoiserange map of current tortoise distribution (See Map 3-10). The 1984 range map (Map 3-7)identified approximately 11,255 mi 2 (7,203,107 acres) of tortoise habitat, whereas 11,134 mi 2(7,125,842 acres) are identified in the 2002 Tortoise Range Map 9 , which represents a reductionof about 121 mi 2 .Map 3-10 depicts three regions within the 2002 tortoise range: reduction areas, expansionareas, and areas requiring more surveys. These areas are discussed in detail in Appendix L.9 Each of these figures over-estimates occupied tortoise habitat, as dry lake playas, elevations above about 4,500feet, and other marginal or unsuitable habitats are included within both range lines. Nor do they imply anythingabout the relative of densities occurring in the older and more recent ranges.Chapter 3 3-91
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CHAPTER THREEAFFECTED ENVIRONMENT3.
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The CDCA Plan assigns a “multiple
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Desert Tortoise Research Natural Ar
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closure to target shooting. Hunting
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percentage of public land ownership
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As of March 2004, BLM had acquired
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Ripley Joshua Tree Woodland: The st
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through “resource use” designat
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Significant Ecological Areas: There
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Wildlife and Wildflower Sanctuaries
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Mojave River Forks Regional Park: A
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oriented commercial uses are expect
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HCP would include mitigation measur
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3.1.3.12 City of RidgecrestThe City
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It is a goal of the town’s genera
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• Inyo California Towhee (April 1
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(i) The taking will be incidental;(
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handled, and number accidentally ki
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3.1.5 California Endangered Species
Page 39 and 40: Obtaining an Incidental Take Permit
Page 41 and 42: Monitoring: Monitoring is often the
Page 43 and 44: is so restrictive that project dela
Page 45 and 46: excess moisture. A minus 4 is consi
Page 47 and 48: Air BasinsN190I n y o C o395Ridgecr
Page 49 and 50: Federal PM10 Planning AreasN190Owen
Page 51 and 52: POLLUTANTOzone (O 3 )RespirablePart
Page 53 and 54: AIRBASINAIR QUALITYDISTRICTPOLLUTAN
Page 55 and 56: subtraction of transported ozone in
Page 57 and 58: The general soil information and ma
Page 59 and 60: The Marine Corps Ground Combat Cent
Page 61 and 62: The most permeable basin-fill depos
Page 63 and 64: Surface water was and is the major
Page 65 and 66: A relatively small number of introd
Page 67 and 68: freshwater or alkali wetlands, or o
Page 69 and 70: 3.3.2 Desert Tortoise3.3.2.1 Regula
Page 71 and 72: progress toward meeting the overall
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Page 75 and 76: several seasons (Esque 1994 in Aver
Page 77 and 78: Assistant District Manager Molly Br
Page 79 and 80: • Since 1975, federal land manage
Page 81 and 82: “52 mi 2 of higher density tortoi
Page 83 and 84: 1984 Tortoise Range and Density Map
Page 85 and 86: Higher Density Tortoise Sign Count
Page 87 and 88: When data for the three lowest sign
Page 89: Occurrence of Tortoises Relative to
Page 93 and 94: Tortoise Distribution within the Re
Page 95 and 96: Boarman (pers. comm., Nov 2002) has
Page 97 and 98: tortoises are either extirpated (La
Page 99 and 100: sites surveyed by LaRue between 199
Page 101 and 102: aseline data are lacking. Grasses p
Page 103 and 104: Canine Predators: This includes coy
Page 105 and 106: The spatial distribution of 12 of 1
Page 107 and 108: Predation Versus Scavenging of Juve
Page 109 and 110: Table 3-20Prevalence of Tortoises i
Page 111 and 112: (Jacobson et al. 1991, Brown et al.
Page 113 and 114: 3.3.2.5.3 Older and Newer Die-off R
Page 115 and 116: Table 3-21Characteristics of Older
Page 117 and 118: Table 3-22Characteristics of Older
Page 119 and 120: of the Johnson Valley Open Area, an
Page 121 and 122: Distribution of Recreational and Re
Page 123 and 124: Tortoises and Burrows Crushed: Vehi
Page 125 and 126: TypeYearsSignCount98-99-01Distance2
Page 127 and 128: OHV Impacts to Soils: OHV use has r
Page 129 and 130: Rodman DWMA. There were no higher d
Page 131 and 132: of Dove Springs that has experience
Page 133 and 134: Both inside and adjacent to open ar
Page 135 and 136: 3.3.2.6.6 Organized Competitive OHV
Page 137 and 138: 3.3.2.7 Current Effectiveness of Ex
Page 139 and 140: Overall, one sees that 68% of the 3
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off regions discussed herein. Black
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ManixACECMojave fishhookcactusRainb
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Range of Mohave Ground SquirrelN190
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3.3.3.2.2 Seasonal ActivityThe MGS
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1996). As herbaceous annuals appear
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1998 Mohave Ground Squirrel Transec
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Finally, the 84% success rate was a
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LaRue characterized substrates at t
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There were no MGS occurrences in 28
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certain shrubs (e.g. winterfat) tha
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NAWS China Lake 1993). As discussed
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Cumulatively, one finds there to be
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Citing Bury and Luckenbach (1977),
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the MGS is restricted to about 7,00
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Habitat Management Plans (HMPs) wer
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Basic to the biology of bighorn she
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3.3.6 Birds3.3.6.1 Bendire’s Thra
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3.3.6.5 Golden EagleLife History: T
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The towhee recovery plan establishe
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Regulatory Status: Federal Endanger
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3.3.6.15 Western Yellow-billed Cuck
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Other major threats are flood contr
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Population Status in the Planning A
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on the inaccessible mountain slopes
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3.3.8.8 Kern BuckwheatLife History:
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Threats Affecting the Mojave Monkey
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3.3.8.16 Red Rock PoppyLife History
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populations show intergradation wit
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3.4.1.1 Regional EnvironmentIn tota
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Table 3-37Average Annual Units Cons
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2002 SOUTHERN CALIFORNIAEMPLOYMENT
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TABLE 3-382000 CENSUS DEMOGRAPHIC C
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to undergo a dramatic reversal to t
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3.4.1.5 Study Area Property Valuati
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The supply of private property in t
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ALLOTMENT NAME TYPE OF LIVESTOCK FO
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Grazing AllotmentsNOlanchaDarwinTun
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ALLOTMENT NAMEALLOTMENTACRESP. L. 1
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3.4.3 Mineral Potential and Develop
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Mineral Potential, Active and Inact
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Mineral Potential, Active and Inact
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development based on the results of
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MANAGEMENT AREATable 3-46Potential
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A third item, yttrium (on the USBM
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the California Department of Conser
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Table 3-49 shows the number of mini
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produces about 75,000 tons per year
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Table 3-50Most Important Deposits B
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3.4.3.5 Coolgardie MesaThe Coolgard
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Areas designated as regionally sign
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Recreationists engage in activities
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OPENAREADoveSpringsElMirageJawboneC
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cycle engine motorcycles in OHV rid
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One popular activity is dual sport
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Compliance With Regulations: Compli
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REGIONORCITYRidgecrestSanBernardino
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REGIONORCITYVictorville /AppleValle
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Rail: The West Mojave planning area
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Arterials: Arterials are routes wit
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Ridgecrest-Inyokern Sanitary Landfi
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approximately 3 miles south of the
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Trona-Agrus Transfer Station (SWIS
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The BLM is an agency of the U.S. De
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Route designations apply only to ro
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Utility Maintenance: Many powerline
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ACECNAME ANDNUMBERHarper Dry Lake(3
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SUBREGIONAmboyBighornCoyoteEastSier
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• All pipelines with diameters gr
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3.6.2 Energy Generation PlantsEnerg
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3.7 CULTURAL RESOURCES3.7.1 Archaeo
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seasonal movement from place to pla
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RIDGECREST FIELD OFFICEPROPERTY NAM
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ACECRose SpringFossil FallsLast Cha
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have been dated by radiocarbon and
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MYACENOZOICEPOCHTable 3-65Paleontol
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In the southern area, fossils of la
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At Twenty-Nine Palms, there is an u
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West Mojave Plan FEIR/S - Desert Managers Group

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