TheNational Wilderness Preservation System (NWPS) of the United States protectsfederally managedwilderness areas designated for preservation in their natural condition. Activity on formally designated wilderness areas is coordinated by the National Wilderness Preservation System. Wilderness areas are managed by four federalland management agencies: theNational Park Service, theU.S. Forest Service, theU.S. Fish and Wildlife Service, and theBureau of Land Management.
The termwilderness is defined as "an area where the earth and community of life are untrammeled by man, where man himself is a visitor who does not remain" and "an area of undeveloped Federal land retaining its primeval character and influence, without permanent improvements or human habitation, which is protected and managed so as to preserve its natural conditions".[1]
As of 2023[update],806 wilderness areas have been designated, totaling 111,889,002 acres (45,279,873 ha; 452,798.73 km2; 174,826.566 sq mi), which comprise about 4.5% of theland area of the United States.[2][3]
During the 1950s and 1960s, as the American transportation system was on the rise, concern for clean air and water quality began to grow. A conservation movement began to take place with the intent of establishing designated wilderness areas.Howard Zahniser created the first draft of the Wilderness Act in 1956. It took nine years and 65 rewrites before the Wilderness Act was finally passed in 1964.[4] TheWilderness Act of 1964 (Public Law 88-577), which established the NWPS, was signed into law byPresidentLyndon B. Johnson on September 3, 1964. The Wilderness Act mandated that the National Park Service, U.S. Forest Service, and U.S. Fish and Wildlife Service review all federal lands under their jurisdiction for wilderness areas to include in the NWPS. The first national forest wilderness areas were established by the Wilderness Act itself.The Great Swamp in New Jersey became the first National Wildlife Refuge with formally designated wilderness in 1968. Wilderness areas in national parks followed, beginning with the designation of wilderness in part ofCraters of the Moon National Monument in Idaho in 1970.
A dramatic spike in acreage added to the wilderness system in 1980 was due in large part to theAlaska National Interest Lands Conservation Act, signed into law byPresident Jimmy Carter on December 2, 1980.[6] A smaller spike in 1984 came with the passage of many bills establishing national forest wilderness areas identified by the Forest Service's Roadless Area Review and Evaluation (RARE) process.[7] TheBureau of Land Management was not required to review its lands for inclusion in the NWPS until after October 21, 1976, when theFederal Land Policy and Management Act of 1976 was signed into law; designation of wilderness areas on BLM lands began in 1978. Over 200 wilderness areas have been created within Bureau of Land Management administered lands since then, consisting of approximately 8.71 million acres (3,520,000 ha) in September 2015.[2]
As of August 2008, 704 separate wilderness areas, encompassing 107,514,938 acres (43,509,752 ha), had become part of the National Wilderness Preservation System.[8] On March 30, 2009, President Barack Obama signed into law theOmnibus Public Land Management Act of 2009. The legislation designated an additional 2 million acres (810,000 ha) in nine states as wilderness, representing the largest expansion of wilderness lands since 1994.[9] TheJohn D. Dingell Jr. Conservation, Management, and Recreation Act of 2019 added another 1.3 million acres (530,000 ha) in 43 new and expanded wilderness areas.[10]
Onfederal lands in the United States,Congress may designate an area as wilderness under the provisions of the Wilderness Act of 1964.[11] Multiple agencies, including theBureau of Land Management, theNational Park Service, theFish and Wildlife Service, and theU.S. Forest Service, are responsible for the submission of new areas that fit the criteria to become wilderness to Congress. Congress then reviews these cases on a state by state basis and determines which areas and how much land in each area will become part of the WPS. There have been multiple occasions in which Congress designated more federal land than had been recommended by the nominating agency.[12] Where as the Wilderness Act stipulated that a wilderness area must be "administered for the use and enjoyment of the American people in such a manner as will leave them unimpaired for future use and enjoyment as wilderness",[12] theEastern Wilderness Areas Act of 1975, which added 16 national forest areas to the NWPS, allowed for the inclusion of areas that had been severely modified by human interference.
TheWilderness Act provides criteria for lands being considered for wilderness designation. Though there are some exceptions, the following conditions must be present for an area to be included in the NWPS: (1) the land is under federal ownership and management, (2) the area consists of at least five thousand acres of land, (3) human influence is "substantially unnoticeable," (4) there are opportunities for solitude and recreation, and (5) the area possesses "ecological, geological, or other features of scientific, educational, scenic, or historical value."[1]
Wilderness areas are subject to specific management restrictions; human activities are limited to non-motorized recreation (such asbackpacking,camping,hunting,fishing, horseback riding, etc.),scientific research, and other non-invasive activities. During these activities, patrons are asked to abide by theLeave No Trace policy. This policy sets guidelines for using the wilderness responsibly and leaving the area as it was before usage. These guidelines include: Packing all trash out of the wilderness, using a stove as opposed to a fire, camping at least 200 feet (61 m) from trails or water sources, staying on marked trails, and keeping group size small. When closely observed, the Leave No Trace ethos ensures that wilderness areas remain untainted by human interaction.[13] In general, the law prohibitslogging,mining,motorized ormechanized vehicles (includingbicycles), road-building, and other forms of development in wilderness areas, though pre-existing mining claims and grazing ranges are permitted throughgrandfather clauses in the Wilderness Act.[14] Wilderness areas fall intoIUCNprotected area management category Ia (strict nature preserves) or Ib (wilderness areas).
A special exemption to the rule against mechanized equipment is made for wilderness areas inAlaska: limited use of motorized vehicles and construction of cabins and aquaculture are permitted.[1] These exemptions were allowed due to the large amount of wilderness in Alaska and the concerns of subsistence users, includingAlaska Natives.
Wilderness areas are parts ofnational parks,wildlife refuges,national forests, and BLM lands; some units are managed by different agencies. Initially, the NWPS included 34 areas protecting 9.1 million acres (37,000 km2) in the national forests. As of 2023, there are 806 areas in the NWPS, preserving 111,889,002 acres (45,279,873 ha).[2] This is approximately 4.5% of the entireUnited States, though only about 2.7% of the 48 contiguous states. However, most of that acreage is located in a handful of states. The states with the highest number of wildernesses areCalifornia,Arizona,Nevada,Alaska, andOregon. However, when measured in acres the list changes dramatically, asAlaska contains many of the largest areas protected under the act. In terms of total acres,Alaska,California,Arizona,Idaho, andWashington are the top five states for wilderness, containing almost 80 percent of the acreage in the system.[2] Wilderness totals in most eastern states are modest, with the exceptions ofFlorida andMinnesota. Wilderness areas exist in every state exceptConnecticut,Delaware,Iowa,Kansas,Maryland, andRhode Island.[8]
Most U.S. wilderness areas are in national forests, but the largest amount of wilderness land is administered by the National Park Service. The largest contiguous wilderness complex in the United States is theNoatak andGates of the Arctic Wildernesses inAlaska at 12,743,329 acres (5,157,042 ha). The largest wilderness area outside Alaska is theDeath Valley Wilderness in southeastern California. The smallest area protected by the WPS is thePelican Island Wilderness in northernFlorida, which measures just 6 acres (2.4 ha) total. The smallest area preserved in the system was formerly the Rocks and Islands Wilderness in Northern California at 5 acres (2.0 ha), but after a reassessment by the Bureau of Land Management in 2006 it was officially expanded to 19 acres (7.7 ha).
On November 7, 2009, an agreement between the United States, Canada, and Mexico entitled the "Memorandum of Understanding on Cooperation for Wilderness Conservation" was made. This agreement created a new entity, the North American Intergovernmental Committee on Cooperation for Wilderness and Protected Areas Conservation, that would streamline the process for open communication between international agencies for the purpose of wilderness preservation.[15] This committee was formed to gain insight on the benefits of wilderness preservation, establish open channels of communication between international agencies, and examine the cultural differences and similarities behind preservation efforts in each country.[15] Within the U.S. system, all of the agencies responsible for wilderness preservation will work in cooperation with their international counterparts to determine the future of both the U.S. system and North American preservation efforts as a whole.
One of the major goals of the Wilderness Preservation System is to provide undeveloped habitats for threatened orendangered species.[12] Many of the species found in the United States are represented in wilderness areas. There are 261 basicecosystems in the U.S., and 157 of them are represented in the system. With 60% of all ecosystems somewhat protected by the NWPS, much of the wildlife in the U.S. also has an area in which to exist without significant human interaction.[12]
In late 2011, a full wilderness review was requested of the Arctic Refuge Coastal Plain in Alaska. One of the major qualifications for this area to be considered as a possible wilderness area was its diverse wildlife population, many of which are on the endangered species list.[12] In this potential wilderness area alone,whales,seals,wolves,polar bears,grizzly bears,muskoxen,caribou, and over 200 species ofmigratory birds call this one area home for at least part of the year. This vast assortment offlora andfauna is a major consideration for addition into the wilderness preservation system.[16]
Thousands of laws and policies have helped shape and manage the National Wilderness Preservation System in the United States. The following Acts of Congress either directly affect the wilderness system or help influence wilderness management:[17]
| Agency | Wilderness area | Agency land designated wilderness |
|---|---|---|
| National Park Service | 43,932,843 acres (17,778,991 ha) | 56% |
| U.S. Forest Service | 36,165,620 acres (14,635,710 ha) | 18% |
| U.S. Fish and Wildlife Service | 20,702,488 acres (8,378,000 ha) | 22% |
| Bureau of Land Management | 8,710,087 acres (3,524,847 ha) | 2% |
| Total | 109,511,038 acres (44,317,545 ha) |
Some state andtribal governments also designate wilderness areas under their own authority and local laws. These are not federal areas, and the exact nature of protection may differ from federal laws. Some U.S. states have created wilderness preservation programs modeled on the NWPS.
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