West Mojave Plan FEIR/S - Desert Managers Group

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all of the Rudnick Common Grazing Allotment and the vehicle management boundaryagreement between the BLM and the Rudnick Estate Trust. Motorized vehicle routes of travelwere designated within the ACEC, which includes both designated wilderness and the JawboneCanyon Open Area. The Pacific Crest Trail crosses the ACEC as well.The ACEC was established to manage and protect significant cultural and wildlife valuesof this transition zone between the mountains and the northwestern Mojave Desert. Among thewildlife habitats present are Butterbredt Springs, an important migratory bird stopover site,habitat for the yellow-eared pocket mouse in Kelso Valley, and the raptor and vulture migratorycorridor between the Kern River Valley and the Mojave River. Nearly the entire range of a WestMojave endemic, the Kelso Creek monkeyflower, is located within the ACEC.Juniper Flats (2,528 acres): An ACEC was established for the Juniper Flats CulturalArea in 1980, and a management plan was prepared in 1988. The foothill area south of AppleValley containing springs and riparian habitat in a dense stand of junipers was an importantNative American habitation and special use site. Juniper Flats also provides important habitatfor the San Diego horned lizard and the gray vireo. The Willow fire in 2000 burned over theentire ACEC, leading to a temporary closure of the area until vegetative recovery had begun.Juniper Flats is an important equestrian riding area and provides access to the Deep Creek hotsprings in the San Bernardino National Forest.Last Chance Canyon (5,913 acres): The CDCA Plan designated Last Chance Canyonin the El Paso Mountains as an ACEC in 1980. A Plan Amendment in 1984 adjusted theboundaries to include additional prehistoric sites. This amendment implemented arecommendation of the ACEC management plan, which was completed in 1982. Thearchaeological sites are part of a larger archaeological district placed on the National Register ofHistoric Places in 1971.Manix (2,897 acres): The Manix ACEC, located 20 miles northeast of Barstow alongthe Mojave River, was established in 1990 to protect paleontological and cultural resources.This site contains blowsand habitat for the Mojave fringe-toed lizard. No management plan hasbeen prepared.Mojave Fishhook Cactus (628acres): A CDCA Plan Amendment established theMojave fishhook cactus ACEC in 1984. The ACEC is composed of two separate parcels in theBrisbane Valley. The purpose of the ACEC is to protect the yellow-spined form of the Mojavefishhook cactus. Subsequent studies have shown that this area may be important to the Mohavemonkeyflower as well. A management plan was completed in 1990, which designated motorizedvehicle routes within the ACEC.Rainbow Basin (4,087 acres): This ACEC, established in 1980, lies ten miles north ofBarstow. It includes two campgrounds, a scenic loop drive, hiking trails and an interpretive trail.The area is popular with visitors who come to see the colored geological formations. The ACECprotects two nest sites for the prairie falcon. The ACEC management plan, completed in 1991,addressed both the ACEC and a larger surrounding area where route designation wasaccomplished and recommendations were made for campground and trail improvements andChapter 3 3-6
closure to target shooting. Hunting is allowed.Red Mountain Spring (717 acres): This area was designated as an ACEC by theCDCA Plan to protect prehistoric values. A 1982 CDCA Plan Amendment listed this area asclosed to vehicle travel. A management plan was completed in 1987. This ACEC was includedin the route designation inventory and designation process for the Red Mountain subregion. Itwas formerly called Squaw Spring.Rodman Mountains Cultural Area (6,204 acres): A 1988 CDCA Plan Amendmentestablished this ACEC to protect cultural resources. Most of it is within the Rodman MountainsWilderness. Portions outside the wilderness are part of the Ord-Rodman route designationsubregion. The site contains raptor nests and limited desert tortoise habitat. No managementplan has been prepared.Rose Springs (859 acres): An area surrounding Rose Springs in Inyo County wasdesignated as an ACEC by the CDCA Plan to protect prehistoric values. Access is limited by agate, which has been vandalized in the past. A management plan was prepared in 1985. Itrecommended closure of the ACEC to motorized vehicles. Access is via a transmission line roadand the Los Angeles Aqueduct road.Sand Canyon (2,609 acres): The Sand Canyon ACEC was established to protectriparian habitat and wildlife in a canyon on the eastern slope of the Sierra Nevada Mountains. Itis one of the most diverse areas in the West Mojave for species of small mammals and supports awide variety of reptiles and birds. Two species nearly endemic to the West Mojave are foundwithin the ACEC: the Ninemile Canyon phacelia and the yellow-eared pocket mouse. Theriparian habitat is important to migratory birds, including the willow flycatcher. An ACECmanagement plan was prepared in 1989.Short Canyon (754 acres): The Short Canyon ACEC was established by an amendmentto the CDCA Plan in 1988. Most of the ACEC lies within the Owens Peak Wilderness. Thepurpose of the ACEC is to protect the unusual vegetation and diverse flora. Short Canyon isknown to support occurrences of Charlotte’s phacelia (Phacelia nashiana), a limited-range plantwhose distribution falls almost entirely within the western Mojave Desert. In addition, asignificant population of the state-listed Mojave tarplant (Deinandra [Hemizonia] mohavensis)was detected in the canyon in 1998. A management plan was prepared in 1990. The primarymanagement action was to exclude grazing from the ACEC. This measure has beenimplemented through fencing and placement of cattle guards.Steam Well (41 acres): This ACEC protects historic and prehistoric values. It lieswithin the Golden Valley Wilderness in San Bernardino County.Trona Pinnacles (4,055 acres): The 1989 management plan for the Trona PinnaclesACEC focused on protection of the outstanding scenery and geological features of this area tenmiles south of Trona. The site is used for commercial filming and sightseeing. At least oneprairie falcon nest site was reported within the ACEC, but falcons have not been recorded therefor the past ten years.Chapter 3 3-7
Page 1 and 2: CHAPTER THREEAFFECTED ENVIRONMENT3.
Page 3 and 4: The CDCA Plan assigns a “multiple
Page 5: Desert Tortoise Research Natural Ar
Page 9 and 10: percentage of public land ownership
Page 11 and 12: As of March 2004, BLM had acquired
Page 13 and 14: Ripley Joshua Tree Woodland: The st
Page 15 and 16: through “resource use” designat
Page 17 and 18: Significant Ecological Areas: There
Page 19 and 20: Wildlife and Wildflower Sanctuaries
Page 21 and 22: Mojave River Forks Regional Park: A
Page 23 and 24: oriented commercial uses are expect
Page 25 and 26: HCP would include mitigation measur
Page 27 and 28: 3.1.3.12 City of RidgecrestThe City
Page 29 and 30: It is a goal of the town’s genera
Page 31 and 32: • Inyo California Towhee (April 1
Page 33 and 34: (i) The taking will be incidental;(
Page 35 and 36: handled, and number accidentally ki
Page 37 and 38: 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
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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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Predation Versus Scavenging of Juve
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Table 3-20Prevalence of Tortoises i
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(Jacobson et al. 1991, Brown et al.
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3.3.2.5.3 Older and Newer Die-off R
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Table 3-21Characteristics of Older
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Table 3-22Characteristics of Older
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of the Johnson Valley Open Area, an
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Distribution of Recreational and Re
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Tortoises and Burrows Crushed: Vehi
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TypeYearsSignCount98-99-01Distance2
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OHV Impacts to Soils: OHV use has r
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Rodman DWMA. There were no higher d
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of Dove Springs that has experience
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Both inside and adjacent to open ar
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3.3.2.6.6 Organized Competitive OHV
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3.3.2.7 Current Effectiveness of Ex
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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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