IMPACT ZONE “B” – Butte
(2,860 K pdf map) (200 K jpg map)
Beginning at the top of Homestake Pass in I-90, proceeding north along the continental divide to Maxwell, then NE to Whitetail Peak, then NW across I-15 to Sheephead Mountain, then W to the forest road intersection near Cotton, then SW across I-90 and SW further to Burnt Mountain. The boundary then goes eastward along the continental divide to Feeley Hill then SE to near Basin Creek Reservoir then NE to Homestake Pass, the point of beginning. Exact boundary locations can be determined from maps on file in the Monitoring Unit.
IMPACT ZONE “BS” – Big Sky
(6,017 K pdf map) (219 K jpg map)
Beginning at the intersection of State Route 64 and Highway (Hwy) 191 travel northwest along the ridgeline to the boundary of the Gallatin Canyon Consolidated Rural Fire District travel south along this boundary to Lone Mountain. Travel southwest along the ridgeline to the southwest corner of Buck Ridge. Travel east along Buck Ridge to the west terminous of Doe Creek Road (2599). The boundary then follows an un-named creek until intersecting again with Doe Creek Road, then follows Doe Creek Road to Hwy 191 then due west to the Gallatin River. The boundary continues north along the Gallatin River to the intersection of State Route 64 and Hwy 191.
IMPACT ZONE “E” - Eureka
(3,117 K pdf map) (92 K jpg map)
Beginning at Virginia Hill head northeast to Lost Lake then continue northeast to the southern edge of Glen Lake then head due north to Ksanka Peak. From here head straight northwest to the point where Murray Creek meets the Kootenai River and then going southeast follow the shoreline to the bridge that crosses the Kootenai River at State Route 37. From the bridge head straight southeast to Virginia Hill.
IMPACT ZONE “K” – Kalispell
(645 K pdf map) (305 K jpg map)
Beginning in the town of Hungry Horse, cross the Flathead River and head NW to Teakettle Mountain, then WSW to a point on Trumbull Creek between sections 24, 25 in T31N, R21W. Go directly West to the corner of sections 20, 21, 28, and 29 in the same Township and Range, then head North to the corner of sections 16, 17, 20, and 21, same T and R. Now head West to the line that divides R21W and R22 W, then North to Big Mountain, then SW down Big Mountain Ridge face toward Whitefish Lake at a point just SE of where Hell Roaring Creek enters the lake. Cross the lake to a point called “Vista” in section 9, T31N, R22W, and then generally follow the higher points, through Woods Lake, Murray Lake, crossing Highway 93 in section 24, T31N, R23W. Continue through Little Bootjack Lake and follow the high points generally WSW to a point on Tally Lake where Logan Creek enters the lake. The boundary crosses the lake generally SSW to Talley Mountain, then generally South to Reid Point Lookout, then South along the “Reid Divide” to the boundary between T30N, T29W, and R23W, and R24W. Turn SE and follow the ridge to a point on Big Lost Creek in section 16, T29N, R23W, then follow the ridge around to “McMannamy Draw” in section 26, T29N, R23W, then generally following the ridges South to Boorman Peak and then South along the Pack Trail to a point where “Dower Draw” enters Ashley Creek. Cross Ashley Creek to a point at the foot of the ridge in section 19, T27N, R22W, then follow this ridge up to Wild Bill Mountain, then straight to Eagle Mountain, then straight to Blacktail Mountain, then generally NW to Lion Mountain, then head straight SE through Baldy Mountain, and on to the Flathead/Lake County line on Highway 93 in section 33, T26N, R20W. Boundary now head directly East across Flathead Lake to Highway 35 and then follows the shore line North along the Flathead/Lake County line to the corner of sections 4,5,8 and 9 in T26N, R19W, then directly North to Hash Mountain, then straight to Doris Mountain then straight to Columbia Mountain and finally straight back to the start point in the town of Hungry Horse, the point of the beginning.
IMPACT ZONE “L” – Libby
(1,310 K pdf map)
(Reference: Libby PM-10 SIP page 27.9.1 (19) dated 2/1/96)
(Reference: Lincoln County Air Pollution Regulation 75.1.404(1))
Includes Impact Zone "L" and/or the Libby Air Pollution Control District.
Air Pollution Control District means the geographical area designated on the attached map and as defined by the following Universal Transverse Mercator (UTM) coordinates:
Begin, 600000mE, 5370000mN; east to 620000mE, 5370000mN; south to 620000mE, 5340000mN; west to 600000mE, 5340000mN; north to 600000mE, 5370000mN.
Beginning at Kootenai Falls (1), going SE to Scenery Mountain (2), then south to Indian Head (3), then south to Treasure Mountain (4), then south to Mount Snowy (5), then east to Double N Lake (6), then across Highway 2 going NE to McMillan Mountain (7), then north to Swede Mountain (8), then NE across Highway 37 to the Vermiculite Mine (9), then west to Sheldon Mountain (10), then WNW to Flagstaff Mountain (11), then SW to Kootenai Falls (1), the point of the beginning.
IMPACT ZONE “M” - Missoula
(3,736 K pdf map) (370 K jpg map)
(Reference: Missoula PM-10 SIP page 32.9.1 (58) dated 11/17/00)
“Impact Zone M” means the area defined by:
T11N R17W Sections 1 through 6, 7 through 11, 17 through 18;
T11N R18W Sections 4 through 8, 17 through 20, 30 through 33;
T11N R19W Sections 1 through 36;
T11N R20W Sections 1 through 18, 20 through 29, 32 through 36;
T11N R21W Sections 1 through 13
T11N R22W Sections 1, 2, 11, 12;
T12N R16W Sections 18 through 20, 29 through 32;
T12N R17W Section 2 through 11, 13 through 36;
T12N R18W Sections 1 through 26, 28 through 33, 36;
T12N R19W Sections 1 through 36;
T12N R20W Sections 1 through 36;
T12N R21W Sections 1 through 36;
T12N R22W Sections 1, 2, 11 through 14, 23 through 26, 35, 36;
T13N R16W Sections 6,7;
T13N R17W Sections 1 through 12, 15 through 21, 28 through 33;
T13N R18W Sections 1 through 36;
T13N R19W Sections 1 through 36;
T13N R20W Sections 1 through 36;
T13N R21W Sections 1 through 36;
T13N R22W Sections 1, 2, 11 through 14, 24, 25, 36;
T14N R16W Sections 18, 19, 30, 31;
T14N R17W Sections 5 through 8, 13 through 36;
T14N R18W Sections 1 through 36;
T14N R19W Sections 1 through 36;
T14N R20W Sections 1 through 36;
T14N R21W Sections 1 through 36;
T14N R22W Sections 1, 2, 11 through 14, 22 through 27, 34 through 36;
T15N R18W Sections 7 through 11, 14 through 23, 26 through 35;
T15N R19W Sections 7 through 36;
T15N R20W Sections 7 through 36;
T15N R21W Sections 9 through 16, 20 through 36;
T15N R22W Section 36; as shown on the map in Appendix A.
IMPACT ZONE “T” – Thompson Falls
(331 K pdf map) (293 K jpg map)
Beginning at Cube Iron Mountain Lookout travel west along the Thorne Creek pack trail to the Clark Fork River. Cross the Clark Fork River and head southwest to Siebers Ridge. Follow west along Siebers Ridge to Mosquito Peak. From Mosquito Peak head southwest to Monroe Gulch. Travel south along Monroe Gulch to Clear Creek. Head west along Clear Creek to the intersection of Clear Creek and Stick Gulch. At this point head southeast to Driveway Peak. From Driveway Peak head straight southeast to Table Top Mountain Lookout then east to Clark Mountain Lookout and continue east to Eddy Mountain Lookout. From this point head due north to the Copper King Campground then northwest to Mount Silcox then travel a northerly direction along a pack trail to the Cube Iron Mountain Lookout.