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Title 40

Displaying title 40, up to date as of 7/16/2026. Title 40 was last amended 7/16/2026.
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Subpart D—Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value

Authority:

Secs. 101(b)(1), 110, 169A(a)(2), and 301(a), Clean Air Act as amended (42 U.S.C. 7401(b), 7410, 7491(a)(2), 7601(a)).

Source:

44 FR 69124, Nov. 30, 1979, unless otherwise noted.

§ 81.400 Scope.

Subpart D, §§ 81.401 through 81.437, lists those mandatory Federal Class I areas, established under the Clean Air Act Amendments of 1977, where the Administrator, in consultation with the Secretary of the Interior, has determined visibility to be an important value. The following listing of areas where visibility is an important value represents an evaluation of all international parks (IP), national wilderness areas (Wild) exceeding 5,000 acres, national memorial parks (NMP) exceeding 5,000 acres, and national parks (NP) exceeding 6,000 acres, in existence on August 7, 1977. Consultation by EPA with the Federal Land Managers involved: The Department of Interior (USDI), National Park Service (NPS), and Fish and Wildlife Service (FWS); and the Department of Agriculture (USDA), Forest Service (FS).

§ 81.401 Alabama.

Area name Acreage Public Law establishing Federal land manager
Sipsey Wild 12,646 93-622 USDA-FS

§ 81.402 Alaska.

Area name Acreage Public Law establishing Federal land manager
Bering Sea Wild 41,113 91-622 USDI-FWS
Mount McKinley NP 1,949,493 64-353 USDI-NPS
Simeonof Wild 25,141 94-557 USDI-FWS
Tuxedni Wild 6,402 91-504 USDI-FWS

§ 81.403 Arizona.

Area name Acreage Public Law establishing Federal land manager
Chiricahua National Monument Wild 9,440 94-567 USDI-NPS
Chiricahua Wild 18,000 88-577 USDA-FS
Galiuro Wild 52,717 88-577 USDA-FS
Grand Canyon NP 1,176,913 65-277 USDI-NPS
Mazatzal Wild 205,137 88-577 USDA-FS
Mount Baldy Wild 6,975 91-504 USDA-FS
Petrified Forest NP 93,493 85-358 USDI-NPS
Pine Mountain Wild 20,061 92-230 USDA-FS
Saguaro Wild 71,400 94-567 USDI-FS
Sierra Ancha Wild 20,850 88-577 USDA-FS
Superstition Wild 124,117 88-577 USDA-FS
Sycamore Canyon Wild 47,757 92-241 USDA-FS

§ 81.404 Arkansas.

Area name Acreage Public Law establishing Federal land manager
Caney Creek Wild 14,344 93-622 USDA-FS
Upper Buffalo Wild 9,912 93-622 USDA-FS

§ 81.405 California.

Area name Acreage Public Law establishing Federal land manager
Agua Tibia Wild 15,934 93-632 USDA-FS
Caribou Wild 19,080 88-577 USDA-FS
Cucamonga Wild 9,022 88-577 USDA-FS
Desolation Wild 63,469 91-82 USDA-FS
Dome Land Wild 62,206 88-577 USDA-FS
Emigrant Wild 104,311 93-632 USDA-FS
Hoover Wild 47,916 88-577 USDY-FS
John Muir Wild 484,673 8-577 USDA-FS
Joshua Tree Wild 429,690 94-567 USDI-NPS
Kaiser Wild 22,500 94-577 USDA-FS
Kings Canyon NP 459,994 76-424 USDI-NPS
Lassen Volcanic NP 105,800 64-184 USDI-NPS
Lava Beds Wild 28,640 92-493 USDI-NPS
Marble Mountain Wild 213,743 88-577 USDA-FS
Minarets Wild 109,484 88-577 USDA-FS
Mokelumme Wild 50,400 88-577 USDA-FS
Pinnacles Wild 12,952 94-567 USDI-NPS
Point Reyes Wild 25,370 94-544,
94-567
USDI-NPS
Redwood NP 27,792 90-545 USDI-NPS
San Gabriel Wild 36,137 90-318 USDA-FS
San Gorgonio Wild 34,644 88-577 USDA-FS
San Jacinto Wild 20,564 88-577 USDA-FS
San Rafael Wild 142,722 90-271 USDA-FS
Sequoia NP 386,642 (1) USDI-NPS
South Warner Wild 68,507 88-577 USDA-FS
Thousand Lakes Wild 15,695 88-577 USDA-FS
Ventana Wild 95,152 91-58 USDA-FS
Yolla-Bolly-Middle-Eel Wild 109,091 88-577 USDA-FS
Yosemite NP 759,172 58-49 USDI-NPS
1 26 Stat. 478 (51st Cong.)

§ 81.406 Colorado.

Area name Acreage Public Law establishing Federal land manager
Black Canyon of the Gunnison Wild 11,180 94-567 USDI-NPS
Eagles Nest Wild 133,910 94-352 USDA-FS
Flat Tops Wild 235,230 94-146 USDA-FS
Great Sand Dunes Wild 33,450 94-567 USDI-NPS
La Garita Wild 48,486 88-577 USDA-FS
Maroon Bells-Snowmass Wild 71,060 88-577 USDA-FS
Mesa Verde NP 51,488 59-353 USDI-NPS
Mount Zirkel Wild 72,472 88-577 USDA-FS
Rawah Wild 26,674 88-577 USDA-FS
Rocky Mountain NP 263,138 63-238 USDI-NPS
Weminuche Wild 400,907 93-632 USDA-FS
West Elk Wild 61,412 88-577 USDA-FS

§ 81.407 Florida.

Area name Acreage Public Law establishing Federal land manager
Chassahowitzka Wild 23,360 94-557 USDI-FWS
Everglades NP 1,397,429 73-267 USDI-NPS
St. Marks Wild 17,745 93-632 USDI-FWS

§ 81.408 Georgia.

Area name Acreage Public Law establishing Federal land manager
Cohotta Wild 33,776 93-622 USDA-FS
Okefenokee Wild 343,850 93-429 USDI-FWS
Wolf Island Wild 5,126 93-632 USDI-FWS

§ 81.409 Hawaii.

Area name Acreage Public Law establishing Federal land manager
Haleakala NP 27,208 87-744 USDI-NPS
Hawaii Volcanoes 217,029 64-171 USDI-NPS

§ 81.410 Idaho.

Area name Acreage Public Law establishing Federal land manager
Craters of the Moon Wild 43,243 91-504 USDI-NPS
Hells Canyon Wild 1 83,800 94-199 USDA-FS
Sawtooth Wild 216,383 92-400 USDA-FS
Selway-Bitterroot Wild 2 988,770 88-577 USDA-FS
Yellowstone NP 3 31,488 (4) USDI-NPS
1 Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon and 83,800 acres are in Idaho.
2 Selway Bitterroot Wilderness, 1,240,700 acres overall, of which 988,700 acres are in Idaho and 251,930 acres are in Montana.
3 Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho.
4 17 Stat. 32 (42nd Cong.).

§ 81.411 Kentucky.

Area name Acreage Public Law establishing Federal land manager
Mammoth Cave NP 51,303 69-283 USDI-NPS

§ 81.412 Louisiana.

Area name Acreage Public Law establishing Federal land manager
Breton Wild 5,000+ 93-632 USDI-FWS

§ 81.413 Maine.

Area name Acreage Public Law establishing Federal land manager
Acadia NP 37,503 65-278 USDI-NPS
Moosehorn Wild 7,501 USDI-FWS
(Edmunds Unit) (2,782) 91-504
(Baring Unit) (4,719) 93-632

§ 81.414 Michigan.

Area name Acreage Public Law establishing Federal land manager
Isle Royale NP 542,428 71-835 USDI-NPS
Seney Wild 25,150 91-504 USDI-FWS

§ 81.415 Minnesota.

Area name Acreage Public Law establishing Federal land manager
Boundary Waters Canoe Area Wild 747,840 99-577 USDA-FS
Voyageurs NP 114,964 99-261 USDI-NPS

§ 81.416 Missouri.

Area name Acreage Public Law establishing Federal land manager
Hercules-Glades Wild 12,315 94-557 USDA-FS
Mingo Wild 8,000 94-557 USDI-FWS

§ 81.417 Montana.

Area name Acreage Public Law establishing Federal land manager
Anaconda-Pintlar Wild 157,803 88-577 USDA-FS
Bob Marshall Wild 950,000 88-577 USDA-FS
Cabinet Mountains Wild 94,272 88-577 USDA-FS
Gates of the Mtn Wild 28,562 88-577 USDA-FS
Glacier NP 1,012,599 61-171 USDI-NPS
Medicine Lake Wild 11,366 94-557 USDI-FWS
Mission Mountain Wild 73,877 93-632 USDA-FS
Red Rock Lakes Wild 32,350 94-557 USDI-FWS
Scapegoat Wild 239,295 92-395 USDA-FS
Selway-Bitterroot Wild 1 251,930 88-577 USDA-FS
U. L. Bend Wild 20,890 94-557 USDI-FWS
Yellowstone NP 2 167,624 (3) USDI-NPS
1 Selway-Bitterroot Wilderness, 1,240,700 acres overall, of which 988,770 acres are in Idaho and 251,930 acres are in Montana.
2 Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho.
3 17 Stat. 32 (42nd Cong.)

[44 FR 69124, Nov. 30, 1979; 45 FR 6103, Jan. 25, 1980]

§ 81.418 Nevada.

Area name Acreage Public Law establishing Federal land manager
Jarbidge Wild 64,667 88-577 USDA-FS

§ 81.419 New Hampshire.

Area name Acreage Public Law establishing Federal land manager
Great Gulf Wild 5,552 88-577 USDA-FS
Presidential Range-Dry River Wild 20,000 93-622 USDA-FS

§ 81.420 New Jersey.

Area name Acreage Public Law establishing Federal land manager
Brigantine Wild 6,603 93-632 USDI-FWS

§ 81.421 New Mexico.

Area name Acreage Public Law establishing Federal land manager
Bandelier Wild 23,267 94-567 USDI-NPS
Bosque del Apache Wild 80,850 93-632 USDI-FWS
Carlsbad Caverns NP 46,435 71-216 USDI-NPS
Gila Wild 433,690 88-577 USDA-FS
Pecos Wild 167,416 88-577 USDA-FS
Salt Creek Wild 8,500 91-504 USDI-FWS
San Pedro Parks Wild 41,132 88-577 USDA-FS
Wheeler Peak Wild 6,027 88-577 USDA-FS
White Mountain Wild 31,171 88-577 USDA-FS

§ 81.422 North Carolina.

Area name Acreage Public Law establishing Federal land manager
Great Smoky Mountains NP 1 273,551 69-268 USDI-NPS
Joyce Kilmer-Slickrock Wild 2 10,201 93-622 USDA-FS
Linville Gorge Wild 7,575 88-577 USDA-FS
Shining Rock Wild 13,350 88-577 USDA-FS
Swanguarter Wild 9,000 94-557 USDI-FWS
1 Great Smoky Mountains National Park, 514,758 acres overall, of which 273,551 acres are in North Carolina, and 241,207 acres are in Tennessee.
2 Joyce Kilmer-Slickrock Wilderness, 14,033 acres overall, of which 10,201 acres are in North Carolina, and 3,832 acres are in Tennessee.

§ 81.423 North Dakota.

Area name Acreage Public Law establishing Federal land manager
Lostwood Wild 5,557 93-632 USDI-FWS.
Theodore Roosevelt, NP 69,675 80-38 USDI-NPS.

[54 FR 41098, Oct. 5, 1989]

§ 81.424 Oklahoma.

Area name Acreage Public Law establishing Federal land manager
Wichita Mountains Wild 8,900 91-504 USDI-FWS

§ 81.425 Oregon.

Area name Acreage Public Law establishing Federal land manager
Crater Lake NP 160,290 57-121 USDA-NPS
Diamond Peak Wild 36,637 88-577 USDA-FS
Eagle Cap Wild 293,476 88-577 USDA-FS
Gearhart Mountain Wild 18,709 88-577 USDA-FS
Hells Canyon Wild 1 108,900 94-199 USDA-FS
Kalmiopsis Wild 76,900 88-577 USDA-FS
Mountain Lakes Wild 23,071 88-577 USDA-FS
Mount Hood Wild 14,160 88-577 USDA-FS
Mount Jefferson Wild 100,208 90-548 USDA-FS
Mount Washington Wild 46,116 88-577 USDA-FS
Strawberry Mountain Wild 33,003 88-577 USDA-FS
Three Sisters Wild 199,902 88-577 USDA-FS
1 Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon, and 83,800 acres are in Idaho.

§ 81.426 South Carolina.

Area name Acreage Public Law establishing Federal land manager
Cape Romain Wild 28,000 93-632 USDI-FWS

§ 81.427 South Dakota.

Area name Acreage Public Law establishing Federal land manager
Badlands Wild 64,250 94-567 USDI-NPS
Wind Cave NP 28,060 57-16 USDI-NPS

§ 81.428 Tennessee.

Area name Acreage Public Law establishing Federal land manager
Great Smoky Mountains NP 1 241,207 69-268 USDI-NPS
Joyce Kilmer-Slickrock Wild 2 3,832 93-622 USDA-FS
1 Great Smoky Mountains National Park, 514,758 acres overall, of which 273,551 acres are in North Carolina, and 241,207 acres are in Tennessee.
2 Joyce Kilmer Slickrock Wilderness, 14,033 acres overall, of which 10,201 acres are in North Carolina, and 3,832 acres are in Tennessee.

[44 FR 69124, Nov. 30, 1979; 45 FR 6103, Jan. 25, 1980]

§ 81.429 Texas.

Area name Acreage Public Law establishing Federal land manager
Big Bend NP 708,118 74-157 USDI-NPS
Guadalupe Mountains NP 76,292 89-667 USDI-NPS

§ 81.430 Utah.

Area name Acreage Public Law establishing Federal land manager
Arches NP 65,098 92-155 USDI-NPS
Bryce Canyon NP 35,832 68-277 USDI-NPS
Canyonlands NP 337,570 88-590 USDI-NPS
Capitol Reef NP 221,896 92-507 USDI-NPS
Zion NP 142,462 68-83 USDI-NPS

§ 81.431 Vermont.

Area name Acreage Public Law establishing Federal land manager
Lye Brook Wild 12,430 93-622 USDA-FS

§ 81.432 Virgin Islands.

Area name Acreage Public Law establishing Federal land manager
Virgin Islands NP 12,295 84-925 USDI-NPS

§ 81.433 Virginia.

Area name Acreage Public Law establishing Federal land manager
James River Face Wild 8,703 93-622 USDA-FS
Shenandoah NP 190,535 69-268 USDI-NPS

§ 81.434 Washington.

Area name Acreage Public Law establishing Federal land manager
Alpine Lakes Wild 303,508 94-357 USDA-FS
Glacier Peak Wild 464,258 88-577 USDA-FS
Goat Rocks Wild 82,680 88-577 USDA-FS
Mount Adams Wild 32,356 88-577 USDA-FS
Mount Rainer NP 235,239 (1) USDI-NPS
North Cascades NP 503,277 90-554 USDI-NPS
Olympic NP 892,578 75-778 USDI-NPS
Pasayten Wild 505,524 90-544 USDA-FS
1 30 Stat. 993 (55th Cong.).

§ 81.435 West Virginia.

Area name Acreage Public Law establishing Federal land manager
Dolly Sods Wild 10,215 93-622 USDA-FS
Otter Creek Wild 20,000 93-622 USDA-FS

§ 81.436 Wyoming.

Area name Acreage Public Law establishing Federal land manager
Bridger Wild 392,160 88-577 USDA-FS
Fitzpatrick Wild 191,103 94-567 USDA-FS
Grand Teton NP 305,504 81-787 USDI-NPS
North Absaroka Wild 351,104 88-577 USDA-FS
Teton Wild 557,311 88-577 USDA-FS
Washakie Wild 686,584 92-476 USDA-FS
Yellowstone NP 1 2,020,625 (2) USDI-NPS
1 Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho.
2 17 Stat. 32 (42nd Cong.).

§ 81.437 New Brunswick, Canada.

Table 1

Area name Acreage Public law establishing Federal land manager
Roosevelt Campobello International Park 2,721 88-363 (1)
1 Chairman, RCIP Commission.

Table 2—Integral Vistas Associated With Mandatory Class I Areas

Park Observation point View angle Key features Also viewed from—
Roosevelt Campobello International Park Roosevelt Cottage and Beach Area 244°-56° Estes head*
Eastport*
North Lubec*
Cobscook Bay*
Shackford Head*
St. Andrews*
Friar's Head*
Treat's Island*
Passamaquoddy Bay*
Deer Island*
Indian Island*
Rouen Island*
Cherry Island*
Thrumcap Island*
Owen House*
Welshpool*
*Features viewed from Friar's Head.
Friar's Head 154°-94° Roosevelt Cottage*
Campobello Island*
Weir*
Friar's Bay*
Welshpool*
Wilson's Beach*
North Road*
Head Harbour Passage*
Casco Island*
Green Island*
Pope Island*
Thrumcap Island*
Cherry Island*
Rouen Island*
Indian Island*
Deer Island*
Passamaquoddy Bay*
Old Sow Whirlpool*
St. Andrews*
Eastport*
Friar Roads*
Estes Head*
Perry*
Shackford Head*
Pembroke*
Cobscook Bay*
Treat's Island*
Major's Island
North Lubec*
Passamaquoddy Dam, portion of*
Roger's Island
Dudley Island*
Johnson's Bay*
Pope's Folly*
Cutler Naval Radio Station
Lubec
Mulholland Point Lighthouse
FDR Memorial Bridge
South Lubec
Grand Manan Island*
*Features viewed from Roosevelt Cottage and Beach Area.
Con Robinson's Point 308°-150° Herring Cove Beach
Provincial Park
Eastern Head
Herring Cove
Mainland New Brunswick*
Point La Preau*
Wolf Islands*
Atlantic Ocean*
Grand Manan Island
*Features viewed from Liberty Point.*
Liberty Point 34°-236° Ragged Point
Mainland New Brunswick*
Atlantic Ocean*
Wolf Islands*
Grand Manan Island*
Sail Rock
West Quoddy Head Lighthouse
South Lubec
*Features viewed from Con Robinson's Points.

[54 FR 21906, May 19, 1989]