West Mojave Plan FEIR/S - Desert Managers Group

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TotalTable 3-35Prevalence of 10 Types of DisturbancesObserved within the Known Range of the MGS During the 1998 SurveyTRANSECTSDISTURBANCE TYPESDisturbancesNoneYesOHV Road Sheep Gun Dump Cow Dog Mine Ord Burn Total310 168 142 145 116 56 23 20 20 12 6 3 2 403% of 310 transects 47% 37% 18% 7% 6% 6% 4% 2%
certain shrubs (e.g. winterfat) that are important in the MGS diet (Leitner and Leitner 1996)(Leitner et al. 1997).Gustafson (1993) indicated that, at that time, grazing was permitted on approximately2,106,000 acres (3,290 mi 2 ) of military and BLM lands within the known range. BLMauthorized cattle grazing on approximately 761,000 acres (1,189 mi 2 ) and sheep grazing on592,000 acres (925 mi 2 ) of potential MGS habitat (see Appendix M for a list of cattle and sheepallotments within the known range of the MGS, and a discussion of cattle grazing outside ofBLM allotments). Cattle may wander up to several miles beyond designated allotmentboundaries (see Appendix M).A total of 1,517,262 acres (2,370 mi 2 ) of BLM sheep allotments are actively being grazedwithin the known range, including 897,820 acres (1,403 mi 2 ) of public lands and 619,442 acres(968 mi 2 ) of private lands. On private lands, woolgrowers, or landowners giving thempermission, are required to obtain federal Section 10(a) permits if their activities are likely toresult in the take of tortoises. To date, there have been no such permits issued for sheep grazing.There is no discretionary action required by county or city jurisdictions for grazing on privatelands, so consequently there is no clear means of regulating this impact on private lands outsidesheep allotments.There are no region-wide data to show the incidence of sheep grazing that is notassociated with BLM allotments. However, because there exists the potential to graze in theseareas, the total sheep grazing area given above likely underestimates actual sheep grazing withinthe known range.Gustafson (1993) indicated that cattle may adversely affect the MGS by trampling andcollapsing burrows, and that sheep may compete for limited annual forage and severely tramplelocal areas. Sheep are generally grazed in the desert between late February and the middle ofJune (Gustafson 1993), which coincides with MGS emergence from hibernation (February) andthe entire activity period, particularly during very dry years when the MGS may enterhibernation in June. These are critical times for both adult and juvenile MGS to attain sufficientfat reserves to enter and successfully emerge from hibernation. The severity of impacts mayrange from marginal in lightly used areas to extreme at cattle troughs and sheep bedding areas.No consolidated data are available concerning the spatial locations of these impacts.Hybridization between Round-tailed Ground Squirrels and the MGS: Hybridizationresults when two different species interbreed to produce progeny that has genetic traits of eachspecies. Physiological, behavioral, and geographical barriers generally segregate two species.Physiological barriers, such as incompatible genitalia, different mating seasons (which alsosuggests behavioral segregation), and similar biological factors tend to remain the same, pendingevolutionary pressures. Geographical barriers may also take a long time to change (measured ingeological time frames), as is the case with the gradual disappearance of lakes that wereprevalent in the Pleistocene. However, some changes in habitat (often referred to as “typeconversion”) can occur in an instant, as when a parcel is bladed, or during several humangenerations (e.g., spread of agricultural development).Chapter 3 3-159
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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
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Obtaining an Incidental Take Permit
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Monitoring: Monitoring is often the
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is so restrictive that project dela
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excess moisture. A minus 4 is consi
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Air BasinsN190I n y o C o395Ridgecr
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Federal PM10 Planning AreasN190Owen
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POLLUTANTOzone (O 3 )RespirablePart
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AIRBASINAIR QUALITYDISTRICTPOLLUTAN
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subtraction of transported ozone in
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The general soil information and ma
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The Marine Corps Ground Combat Cent
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The most permeable basin-fill depos
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Surface water was and is the major
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A relatively small number of introd
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freshwater or alkali wetlands, or o
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3.3.2 Desert Tortoise3.3.2.1 Regula
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progress toward meeting the overall
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“higher density” and “lower d
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several seasons (Esque 1994 in Aver
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Assistant District Manager Molly Br
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• Since 1975, federal land manage
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“52 mi 2 of higher density tortoi
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1984 Tortoise Range and Density Map
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Higher Density Tortoise Sign Count
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When data for the three lowest sign
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Occurrence of Tortoises Relative to
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Regional Declines in the Four DWMAs
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Tortoise Distribution within the Re
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Boarman (pers. comm., Nov 2002) has
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tortoises are either extirpated (La
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sites surveyed by LaRue between 199
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aseline data are lacking. Grasses p
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Canine Predators: This includes coy
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The spatial distribution of 12 of 1
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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
Page 141 and 142: off regions discussed herein. Black
Page 143 and 144: ManixACECMojave fishhookcactusRainb
Page 145 and 146: Range of Mohave Ground SquirrelN190
Page 147 and 148: 3.3.3.2.2 Seasonal ActivityThe MGS
Page 149 and 150: 1996). As herbaceous annuals appear
Page 151 and 152: 1998 Mohave Ground Squirrel Transec
Page 153 and 154: Finally, the 84% success rate was a
Page 155 and 156: LaRue characterized substrates at t
Page 157: There were no MGS occurrences in 28
Page 161 and 162: NAWS China Lake 1993). As discussed
Page 163 and 164: Cumulatively, one finds there to be
Page 165 and 166: Citing Bury and Luckenbach (1977),
Page 167 and 168: the MGS is restricted to about 7,00
Page 169 and 170: Habitat Management Plans (HMPs) wer
Page 171 and 172: Basic to the biology of bighorn she
Page 173 and 174: 3.3.6 Birds3.3.6.1 Bendire’s Thra
Page 175 and 176: 3.3.6.5 Golden EagleLife History: T
Page 177 and 178: The towhee recovery plan establishe
Page 179 and 180: Regulatory Status: Federal Endanger
Page 181 and 182: 3.3.6.15 Western Yellow-billed Cuck
Page 183 and 184: Other major threats are flood contr
Page 185 and 186: Population Status in the Planning A
Page 187 and 188: on the inaccessible mountain slopes
Page 189 and 190: 3.3.8.8 Kern BuckwheatLife History:
Page 191 and 192: Threats Affecting the Mojave Monkey
Page 193 and 194: 3.3.8.16 Red Rock PoppyLife History
Page 195 and 196: populations show intergradation wit
Page 197 and 198: 3.4.1.1 Regional EnvironmentIn tota
Page 199 and 200: Table 3-37Average Annual Units Cons
Page 201 and 202: 2002 SOUTHERN CALIFORNIAEMPLOYMENT
Page 203 and 204: TABLE 3-382000 CENSUS DEMOGRAPHIC C
Page 205 and 206: to undergo a dramatic reversal to t
Page 207 and 208: 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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