Study Area Eighteenmile Wilderness The Study Area The Eighteenmile includes 24922 in the the eastern and Divides studied boundary pine was studied the in in the alternative 10126 acres Clear ElS and would to grassy under Final all partial on and located the east wilderness released bounded is steep the of by the Salmon Forest WSA is and Idaho Leadore on National the west mountainous by the 11141-foot sagebrush-grass with The Forest through the south by public and low rising to hills Peak Eighteenmile up WSA on Douglas-fir private which is lodgepole Divide Land Policy ElS no wilderness alternative other The dominated Impact Statement alternative southeast National from lowland 603 of the Federal for uses miles on the north drainages cliffs varies Vegetation on 15 by the Beaverhead and Environmental wilderness Lemhi County Ten Mile Creek meadows Section in WSA The meadows WSA the an be rolling of Lemhi is lands Forest Eighteenmile limber WSA included BLM National Continental pine The the ID-43-3 of acres by the Targhee lands WSA acres 24922 -- in than which 14796 wilderness 512 and Management Act filed in retention acres which would is the FLPMA December 1987 alternative be no Five wilderness/no recommended recommendation and for wilderness of this was alternatives report were action and Recommendation and 14796 Rationale acres recommended for recommended for wilderness 10126 acres nonwilderness The recommendation acres for uses would use all within the WSA Eighteenmile The the lack and The Wilderness the of the cliffs topographic of portion environment the over environmental 10126 The release to wilderness all 14796 with of federal acres nonwilderness for 10126 alternative The recommendation term long impacts recommended acres the is land shown on are the with area in is on also abuts RARE Areas II for wilderness Lemhi of RARE the would as wilderness areas exemplary wilderness the Peaks Italian remote portion rather portion based is the recommended acres 14796 designated if wilderness for provide II designation and County Units receives wilderness contiguous exceptional 100 than less located that of Montana and provide Peaks Italian ease values both Idaho in straddles visitor south and the to and scenery the Montana and Idaho in recommended of the The Divide would area are foothills rolling Continental relief WSAs the ensure preservation and comprised of sagebrush offering communities plant offer outstanding unconfined recreation and primitive the and as wilderness acres alternative preferable the an visitor outstanding of an exceptional to opportunity along the landscape with grass contrasting rolling meadows and the naturalness experience of backbone nations The The The areas Divide 14796 designate adverse and interrelation The recommended designation Continental acres and conflicts Divide minimize or for wilderness 14796 solitude three Continental steep of proximity annually days east its to from the natural change avoid is environmentally map Proposal of resource recreation use recommended recommendation The least to means practical management the cause WSA Eighteenmile wilderness than would It acquisitions for the other and lack of human as roads imprints or vehicle The solitude for opportunities limited are to ways area one and into offers vehicle to adjacent outstanding and way recommended the for opportunities few very range improvements There few are with conflicts recommended area not is other of resource sufficient of uses quantity to the be of recommended area commercial value Timber for wilderness especially the in the distance considering local to mills The displacement and the The 10126 acre to According will Also west acres be the are ORV use is outside portion Removing portion 2470 of areas adjacent this USGS that is area not the not from offer under almost recommended the suitable survey potential currently because significant WSA is application for area high for the ORV wilderness would gypsum for prospective area proposed limitless designation allow and receives future lies to phosphate moderately high permits only 15 visitor use days per year opportunities If this occurs the north and for of the gypsum Portions phosphate four miles recommended mining on 2470 of acres the new road probably of built the northern of the the WSA the WSA portion Continental could eliminate of the Divide access Eighteenmile that to was this not WSA surrounds an isolated recommended inholding or more for wilderness likely 513 portion of the Wilderness cherry-stem Salmon designation road would be National of this necessary Forest portion of dissecting consideration Another accessible by naturalness Five is hundred rated edge of Preventing and solitude acres that was ORVs in as crucial elk the foothills the the the habitat Approximately tip is portion would be unconfined recreation northwestern winter northern access of the possible head of WSA habitat winter in 514 less and are extends this area steep signing especially Eighteenmile elk and by fencing opportunities General elk winter 240 more open on in north most making but the area south of of of lessen Continental larger and would more the feeling of Divide about the the area 2500 acres crucial area which along the nT1621 r2 \i 12 LJ 15 -c hAp 14 IC 555 6LneI -1 824110566 -_ 7.- 14 1E PH -4 13 128 IC 54N6 2N 2\B6 Cj6 2/ 68 7/ IH 2/I\ TAEE 18 .9 -1 NATIQfSAL 13 v.9C 17/ -r 7_i1 12 2844 fI Ii 59 iLl/SI is th1t.r /Lot -r g4 54 8E4fr ntt1o Lii /54 R.27 R.28 R.28 LIllIllIll RECOMMENDEDFORWILDERNESS LI_i RECOMMENDED llfflllfl LANDOUTSIDEWSARECOMMENDED FOR R.29 JR.29 R.30 SPLITESTATE fflhIllhIIIIllhI NONWILDERNESS STATE PRIVATE FOR WILDERNESS -j Scale in Miles D-43.3 EIGHTEENMI PROPOSAL LE JUNE1988 Table Land Status and Acreage -- Summary EIGHTEENMILE Within BLM surface Split Estate and surface state Area Study 24922 only private 24922 Total Within BLM BLM the Recommended Wilderness Boundary WSA within 14796 WSA outside Split Estate within Split Estate outside Total BLM for WSA WSA Recommended Land Wilderness 14796 Inholdings state State outside land private WSA Within the Area Not Recommended for Wilderness BLM 10126 Estate Split BLM Total for this is report minerals owner Not Recommended of the 10126 state Inholdings of Land Wilderness Appendix Study Area WSA subsurface BLM lnholdings Wilderness of the detailed split Lands description estate that surface private lands are have federal of inholdings defined minerals only but and split estate tracts as those lands with nonfederal estate 516 surface included within federal surface and should be classified the study For purposes nonfederal subsurface in this report by the Considered Criteria Wilderness Recommendations the Wilderness in Developing Characteristics Naturalness The Eighteenmile WSA foot Peak Eighteenmile to the rising smaller drain gulches meadows grassy timber harvest In with vehicle way of Five is mining WSA the edge of imprints activity in acres are are into is rail The Creek visitor Other low with and valleys is than lodgepole creek most occupies have cutting outstanding Eighteenmile through Douglas-fir up several hills numerous WSA the vegetation by the 11141- mountainous and pine No bottoms limber pine or vegetation occurred wide offered minor panorama dominated and improvements range by steep small negligible four of miles Creek Clear at and post fence the naturalness draining impacts the perception lessening hundred rated creeks human human only as past small riparian dominated is is major creeks Eight outside communities topography general cliffs steep the west to Willow-aspen some minor than recommended area the valleys The on the Divide other Creek Eighteenmile lowland sagebrush-grass from Vegetation varies to into and WSA The imprints The boundary meadows rolling few human with forms the eastern Divides Continental natural predominantly is which of way minor range improvements vehicle These visual intrusions tip of the habitat the foothills Approximately 240 head of WSA Eighteenmile General elk winter winter and within the off-site WSA intrusions visual visible are such from much acres which naturalness the northwestern as crucial elk not although habitat elk winter in are extends in of about of the due to larger area and north south 2500 crucial area along the area this Solitude The recommended and per year The area per year to Solitude lack exist receives currently it would be concentrate within the more use the of vegetative outside distributed evenly WSA of the screening remoteness vegetative tend portion less and use than along screening WSAs in 100 the creek nonrecommended this an visitor isolate would Under use visitors days be of per from of ideal conditions high year the for solitude opportunity moderate rugged 500 terrain use visitor days quality With sights and heavy use sounds of more others than 500 since visitor use the steep days slopes bottoms portion area outstanding accessibility opportunities to difficult provides limited is also opens much However nonrecommended outstanding of the boundary 517 the proximity portion to to these mining sights activities and and sounds that Primitive WSA The Eighteenmile hiking backpacking snowshoeing area sights and and Special The Continental and Unconfined offers outstanding camping cross-country sounds of horseback skiing mining Recreation rockhounding are excellent activities coupled in and for primitive opportunities riding the with hunting unconfined recreation wildlite viewing recommended portion less vegetative However screening Opportunities photography in lessens the the nonrecommended feeling of wildness Features Divide forms the eastern boundary of the WSA 518 It is also the Montana and Idaho for fishing boundary Diversity in the National the Assessing and Features Wilderness designation WSA nearby Frank 19 the represents other areas as of Rocky Church BLM Diversity the of Natural Represented this WSA would Mountain River in Wilderness of state No Preservation Systems by Ecosystems not Forest new ecosystem add Province study with this or landform Forest Douglas-fir Return Wilderness and under System by 18 This designated to the NWPS ecosystem areas with is The Fighteenmile in represented 1349971 the There acres ecosystem TABLE Ecosystem Representation NWPS Bailey-Kuchier areas classification Rocky Mountain Areas Other acres areas BLM Studies acres Forest Province NATIONWIDE Douglas-Fir Forest 18 Ecosystem 134g$71 26152 IDAHO Douglas-Fir Forest Ecosystem ig 519 173228 are Expanding Within The Eighteenmile of designated areas the Days WSA and is for Solitude Opportunities Driving within other Time Five Hours five-hour BLM or Primitive drive areas study from of Major Boise within Idaho five-hour drive Recreation Centers Population Table of the summarizes population the number and center Table Wilderness of Opportunities Major Population NWPS Population Boise Idaho Centers Areas for Residents Centers Other areas acres 16 4741570 520 areas 141 BLM Studies acres 5374250 acreage the Balancing Wilderness areas Idaho NWPS the contains six of percent the designated the further areas River No of would concentrate wilderness Church not contribute wilderness areas Areas to balancing in Idaho the largest wilderness including in acres of geographic distribution the contiguous in area The 3869197 Return Wilderness the these six 48 the states amount areas to Idaho in acreage WSA Eighteenmile would but Frank 2.2 million acre seven of designation within of Wilderness Distribution Geographic Manageability The recommended RARE Areas II inaccessible on manageable unit On and portion administrative costs patrolling would be to Several thousand acres nonwilderness lands The U.S of which U.S is Forest Idaho in since Service would much is lands east of of the WSA Forest boundaries abut the and steep logical and values on allows of However access to lands the to the Divide as of the suitable and Fencing forms the east forming would Eighteenmile ORVs which Divide lower the most recommended not portion Service west of protect relief the Continental lie portion to gentle and gentler U.S the this On along nonwilderness more is ORVs to values even Wilderness designation extremely creates this be necessary the terrain the terrain to adjacent is land inaccessible wilderness protect Areas II common since Divide cause an island road of access lands problems to these and to WSA the boundary steep is RARE patrolling because as wilderness Continental the of the and use and The with lie fencing be higher likely necessary eastern Energy extremely is and ORV by Montana combined terrain boundaries caused impacts recommended would the steep managed reasonably and When area western from areas of be can both Idaho in the nonsuitable the northern elevation Peaks because WSA of the portion Italian Minerals Resource Survey Geological Values mineral prepared resource for the report WSA Eighteenmile 1988 in USGS Bulletin 1718-B The northern lands portion immediately such as silver Moderately probably Continental oil present The The and for Bulletin northern under in at 1718-B of in depths to of the is above the has has been for the potential sediments of Eighteenmile of commercially occurrence of extracted metallic from minerals than in and the None of Cottonwood Beaverhead the Creek These Pluton which outcrop samples values forms the indicated any intrusion this is feet gas rather WSA of the limit from taken Creek uranium of amounts trace 10000 to has Gypsum gypsum moderate others geothermal resources thought WSA for prospective WSA the southern samples form of natural but and for potential The zinc occur the development portion application the high WSA Creek including potential be has the concentration fluvial from Pass values gas would potential USGS from Divide The to uranium values high uranium WSA the molybdenum copper resulted high of adjacent low to moderate It is expected that any hydrocarbons oil was not addressed in the USGS Mineral Resource Report be low moderate to high potential permit 521 for phosphate and parts of the WSA are presently Occurrence widespread Poor access Impacts on of mineral Sand and and the distance both the suitable limestone to and other and bulk markets seriously reduce nonsuitable mineral of portions resources the potential for are the Eighteenmile abundant developing throughout these WSA is the entire resources Resources The comparative impact alternatives in materials gravel considered table on including the following designation or page summarizes nondesignation 522 the of effects the entire on pertinent area as resources wilderness for all the WSA Table Summary of the Impacts ID-43-3 EIGHTEENMILE Comparative WSA ENVIRONMENTAL PROPOSEI ISSUES PARTIAL ACTION NO WILDERNESS/ RETENTION WILDER- NO WILDERNESS/ DEVELOPMENT by Alternative WSA ALL WILDERNESS WILDERNESS PARTIAL RETENTION NESS/DEVELOPMENT on Impacts Wilderness Naturalness would Values ed and be 10% WSA of constriction mad new of surface to sub-jeer adverse on and Energy of Loss Exploration of Mineral resnurces both on for area not to Wit- be are activities anticipated of both gypsum of and surface acres area recommended within the the to acres road Naturalness ne of acres pro No development jected face not construction ur sur disturbance 90t to adverse activities Wil acres on Impacts Nonmolorized Motorized aud activities presently Loss on 2470 acres area recommended within the of opportunity de-velop any min-eral resources 24780 energy be to Opportunities the and semi and soeiated min-eral resources 14796 be for of Miaiag gypsum primi- Primitive recrea- live due of uses as- tion use displaced 4026 on the primireerea- would roads and of vehicle with days would be as- the 15 and and is 2470 on projected within acres the recommended sot use displaced 25 all semi recreational be gradual of days ORV 15 displaced visitor of days be would use ORV displaced opportunities because lost of iv proliferation drive tracks of ties aetivi visitor use nonmotorteed primitive in-fluence ORV term long wheel projected of In prtusi-tive would uses activities visitor due acres construction mining ORV semi opportunities lost sociated 15 of and sonstolorized be to projected activities days would on acres phosphate area and energy recommended the to opportunity wilderness would vehicle with mining visitor of any the acres construction roads anticipated de-velop acres no are Loss for wilderness be but for wilderness on 4026 lost would loss and on 8926 na to on lion opportunities Recreation 36% both nonmototrzed live values adverse phosphate Wil development to projected as projected sub-ject is of acres disturbance with acres of both the to miles 1050 and no recommended Primitive Primitive Primitive road be for wilderaess Semi due but anticipated acres of would are affect 1250 WSA of derness of within on construction mining on 22452 loss gypsum 5% solitude adversely lost or sociated development sub-jeer ed and be of surface projected values would new as disturbance not of and would on 2470 cur miles 2270 with mining and due solitude to naturalness acres of road new Mining projected on 2470 not WSA of presently phosphate is 10% Impacts affect- 2470 construction acres no but on lost derness 22452 would toss or solitude adversely soctated for wilderness projected is 2470 90% of and be and phosphate the as- projected values Mining and acres development mining of disturbance presently and the to mttes 2270 with adverse to Mining gypsum surface acres acres wilderness of and ed acres due of road sub-jeer energy recommended new no opportunity min-eral WSA of Naturalness would affect- on 2470 lost 10% solitude adversely comtruction be anticipated any or derness are de-velop 14796 Resources but and be socrated Wil- would loss activities presently Development as- on 7656 values 31% acres of projected development mining the acres 2270 with derness for and to ed miles disturbance sociated Impacts acres due of and Naturalness would affect- on 2470 lost or solitude adversely 4- and the mining No ORV of displacement use on Water Impacts Oualily Loss of mile marginal No impact use days Water Loss habitat on nose Creek by Sediment use and Clear activity could levels on Crucial Range Numbers and Elk Elk 500 elk winter herd use Tenmile Creek Creek depend-ing be Clear on the where miu-ing Sediment streams In those Agency EPA acres 50% size could exceed EPA quality fishery habitat me waler or days of crucial range reduction 120 would in animals All be lost herd No ares range 50% size of crucial would reduction elk Alt 500 of elk winter in lost 120 animals herd 50% size 523 would reduction 120 could in animals Loss be tat not of 500 and 120 occur acres animals of habiwould All elk lost herd loeatioa and Clear have levels sediment of crucial range the on Creek Creek be activity mining Tenmile standards occur could im-pacted depending could acres be none quali-ly adversely the habitat fisherman on days Water alt mile of fishery impact EPA 500 winter of marginal use occurred levels EPA exceed Loss to watersheds mining sediment le-vels no impacts be in iv be udverse fisher-man occur could im-paeted perennial area fisherman quali-ry would There habitat none days Water of on impact adversely in and mile fishery standards All lost im-pacted of No ocrur could of marginal activity Protection Winter Loss habitat fisherman quati-ty location standards Impacts of none days Environ-mental exceed on impuct adversely in mining mile fishery Water be im-pacted Tenmile No occur could of murgisat fisherman quati-ty adversely Creek of fishery exceeding standards 500 acres winter 50% size of crucial range reduction would in 120 animals be Local The and social Economic and Social economic factors Considerations not were Summary of WSA-Speciflc Public involvement has 194 EIS to pertained In that WSA Those abuts to the adjacent Most The U.S local Fish Guard Idaho on the Draft Clean would Soil ElS Water conflict and County and State commented on Water The EPA Act Standards between U.S overflights The State Historic for one or all part commenter and review public comment the of the Fighteerimile addressed of letters the Draft 160 WSA 153 merits of the relative Guard mission policy Office would is to did Soil short opposed and not 524 would to opposed Protection and of more provide Water total EIS the but wilderness create too the fact for for wildlife much Agency Idaho Air Conservation District designation designation characteristic specifically and also expressed protection any further wilderness comment was wilderness in wilderness wilderness the wilderness oppose for wilderness designation ranchers Lemhi unconfined recreation primitive Support Environmental the any decision training Preservation wilderness and and Peaks wilderness Service that its that further Air National tactical solitude Italian permittees Office Conservation District stated The Idaho and Forest concerned Unit II that grazing Preservation was while outstanding Trail concerned Service Historic the RARE Divide comment was from Wildlife formal Of meeting designation recommended were study During process formal at designation WSA for the wilderness Continental heard also supported wilderness wilderness opposing Idaho the the issue wilderness on wilderness favoring the lands the commenters review the wilderness throughout Testimony was in issue significant Comments Public suitability supported no formal position no Those occurred received the wilderness six general commenters took were letters considered about would because of National all its wilderness not meet designation The solitude designation commented in Lemhi Lemhi APPENDIX Estimated Costs -- EIGHTEENMILE of Acquisition of for Within Areas Recommended of Type by Estate Number Legal Total Description Acreage Surface by Ownership Estate of Owners Holdings Designation1 of Type Ownership WSA Nonfederal Estate Subsurface Presently Estate Proposed Preferred Method for Acquisition Estimated Cost of Acquisition Land Processing Costs in of of Acquisition Costs in Acquisition No Parcel 14 Sec Estimated Cost 28 640 Stale State N/A Exchange 10000 36 UThe mineral holdings estimated estates and costs with in listed smitar no way in this represent an in appendix rharnetensties offer to to no way those purchase formal represent inrtsded or in the exchange WSA at the appraised The cost estimates estimate value are of the for tnclsded land purposes in 525 this or mineral of estate estshlishing appendix bat are range rough of estimatea potential based costs to on the sates or government exchanges of of acquiring lands or nonfedemi
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