Wilderness Laws: Permitted and Prohibited Uses

^Pr^ep^ar^{ed f}^o^r^M^e^m^b^ers^an^d^Com^mⁱ^t^t^ees^of^C^ong^r^e^ss

The Wilderness Act generally prohibits commercial activities, motorized uses, and infrastructure
developments in congressionally designated wilderness areas. However, the Wilderness Act and
many subsequent laws designating wilderness areas also contain provisions authorizing activities
that do not conform with these general prohibitions. The general prohibitions and the authorized
uses are important because controversies persist over permissible and prohibited activities in
wilderness areas, and because bills often seek to modify existing areas or activities.

Wilderness Act Provisions...............................................................................................................1
Subsequently Enacted Provisions....................................................................................................3
Motorized Access—Land..........................................................................................................3
Motorized Access—Water.........................................................................................................4
Motorized Access—Air.............................................................................................................4
Water Infrastructure...................................................................................................................5
Other Infrastructure and Activities............................................................................................6
Author Contact Information............................................................................................................8

ongress approved the Wilderness Act (P.L. 88-577; 16 U.S.C. §§1131-1136) in 1964 to
establish a National Wilderness Preservation System on federal lands “where the earth and
its community of life are untrammeled by man, where man himself is a visitor who does C

not remain.” As of December 31, 2007, the System totaled 694 units, with 106.6 million acres.
(See CRS Report RL31447, Wilderness: Overview and Statistics, by Ross W. Gorte.) Congress
has taken two basic approaches to protecting the wilderness attributes on certain federal lands
while allowing some uses that might alter the pristine character of the lands. One approach,
described here, is to explicitly allow uses in congressionally designated wilderness areas that do
not conform with the Wilderness Act’s general management guidance; the other, not covered in
this report, is to designate areas by some other label, with special management direction for those ¹
areas in the laws creating them.
The Wilderness Act, directly and by cross-reference in subsequent wilderness statutes, generally
prohibits commercial activities, motorized uses, and roads, structures, and facilities in units of the
National Wilderness Preservation System designated by acts of Congress. Specifically, §4(c)
states:
^Ex^{cept as}^s^p^ecifⁱ^call^y^prov^{ided f}^o^{r in}^th^is^A^c^t,^an^{d s}^u^bj^{ect to ex}^is^ting^priv^{ate righ}^ts^{, t}^h^ere
^s^h^{all be n}^o^co^m^m^{ercial e}ⁿ^ter^p^ris^e^an^{d n}^o^perm^an^eⁿ^{t road}^wⁱ^t^hⁱⁿ^any^wⁱ^ldern^e^s^s^area
^desⁱ^gn^{ated b}^y^this^{Act a}ⁿ^{d, e}^x^{cept as}ⁿ^ece^s^s^a^r^y^to^m^eet^minⁱ^m^u^m^requ^ire^m^en^t^s^f^o^{r t}^h^e
^admⁱⁿⁱ^s^t^ration^o^f^th^{e area}^f^o^{r th}^{e pu}^rpos^{e of}^thⁱ^s^A^c^{t (i}^nclu^ding^m^eas^u^r^es^requ^{ired in}
^e^m^erg^eⁿ^c^iesⁱⁿ^v^o^l^vⁱⁿ^{g t}^h^e^h^e^alth^aⁿ^d^s^a^f^e^t^y^o^f^pers^ons^wⁱ^t^h^{in t}^h^{e area), t}^h^{ere s}^h^all^{be n}^o
^te^m^porary^{road, n}^o^u^s^{e of}^m^o^t^o^{r v}^e^hⁱ^cles^,^m^o^{torized equ}ⁱ^p^m^en^{t o}^r^m^o^t^o^r^b^o^a^t^s^,ⁿ^o^l^aⁿ^dⁱⁿ^g^o^f
^air^c^r^a^f^t^{, n}^o^o^t^h^e^r^f^o^r^m^o^f^m^e^c^h^an^ica^l^tr^an^sp^o^r^{t, an}^dⁿ^o^s^t^r^u^c^t^u^r^{e o}^rⁱⁿ^stallatioⁿ^wⁱ^t^hⁱⁿ^aⁿ^y
^s^u^c^h^area.
This section thus prohibits most businesses, commercial resource exploitation (such as timber
harvesting), and motorized or mechanical entry (via cars, trucks, off-road or all-terrain vehicles,
bicycles, aircraft, or motorboats) except in emergencies.

The Wilderness Act also authorizes activities that do not conform with the general restrictions, ²
usually subject to regulation by the Secretary. Specifically:
• §4(d)(1) allows “the use of aircraft or motorboats, where these uses have already
become established,” subject to “desirable” restrictions;
• §4(d)(1) also allows “such measures ... as may be necessary in the control of fire,
insects, and diseases,” subject to “desirable” conditions;
• §4(d)(2) allows mineral prospecting conducted “in a manner compatible with the
preservation of the wilderness environment”;

¹^T^h^e^r^e^ha^s^a^l^s^o^be^eⁿ^s^u^bs^ta^ntia^l^d^e^ba^te^ov^e^r^a^d^mⁱ^nis^t^r^a^tiv^e^a^nd/or^l^e^gⁱ^s^l^a^tiv^e^pr^ote^c^{tion of}^the^inv^e^nt^or^ie^{d r}^o^a^d^le^s^s
^a^r^e^a^s^{in the}^Na^tio^na^{l Fo}^re^{st Sy}^ste^m^{. For inf}^o^rm^a^{tion, se}^e^{CRS Re}^p^o^{rt RL}³⁰⁶⁴^7,^N^a^tion^a^{l Fo}^rest^S^y^{stem Ro}^ad^{less Area}
^Initia^tiv^e^s^{, by}^K^r^is^tina^A^l^e^x^a^nde^r^a^{nd R}^o^s^s^W^.^G^o^r^t^e^.
²^T^h^{e W}^ild^ern^e^{ss Act g}^eⁿ^e^rall^y^re^ferred^to^t^h^{e Secretary}^o^f^A^g^ricu^ltu^{re, b}^ecau^{se th}^{e act i}ⁿ^itially^oⁿ^l^y^d^e^sigⁿ^ated
^w^ilde^r^ne^s^s^a^r^e^a^s^{in the}^N^a^ti^ona^{l F}^o^r^e^s^t^Sy^s^t^em^{. Subs}^e^que^nt^wⁱ^l^d^{erness l}^a^w^s^re^f^e^{r t}^o^t^h^{e S}^ecret^ar^y^o^f^Agri^cu^l^t^u^{re o}^r
^Se^c^r^e^t^a^r^y^of^the^Iⁿ^te^rⁱ^or^,^de^pe^ndⁱⁿ^g^{on w}^h^o^ha^s^ju^rⁱ^s^d^ic^ti^on^ov^e^r^t^h^e^de^sⁱ^gⁿ^a^t^e^d^a^r^e^a^s^.

• §4(d)(3) provides for establishing and developing valid mineral rights, “subject,
however, to such reasonable regulations governing ingress and egress as may be
prescribed” consistent with using the land for mineral development, and with
leases, permits, and licenses containing “such stipulations as may be prescribed
... for the protection of the wilderness character of the land consistent with the ³
use of the land ... ”;
• §4(d)(4) allows the President to authorize water project development, including
road construction and use;
• §4(d)(4) also allows livestock grazing, “where established prior to the effective
date of this Act ... subject to such reasonable regulations as are deemed
necessary”; and
• §4(d)(6) allows commercial services “which are proper for realizing the
recreational or other wilderness purposes of the areas.”
In addition, access for livestock and wildlife management have fostered concerns over the years. ^st
After discussions in several Congresses, the 101 Congress provided detailed guidelines in
H.Rept. 101-405, the Interior and Insular Affairs Committee’s report on the Arizona Desert
Wilderness Act of 1990 (P.L. 101-628). Appendix A (pages 41-43) is “Grazing Guidelines,” and
states (among other provisions):
^T^h^e^m^aⁱⁿ^ten^aⁿ^{ce o}^f^s^u^pporting^f^acilitie^s^,^e^x^is^tⁱ^ngⁱⁿ^aⁿ^are^a^{prior to its}^clas^sⁱ^fⁱ^catioⁿ^as
^w^ild^erⁿ^e^{ss (}ⁱⁿ^c^l^u^dⁱⁿ^g^f^eⁿ^c^e^s^{, lin}^{e cab}ⁱⁿ^s,^w^a^ter^w^e^{lls a}ⁿ^d^lin^{es, sto}^c^k^tan^k^{s, etc.)}^,^is
^permⁱ^s^sⁱ^{ble i}ⁿ^w^ildern^e^s^s^.^W^h^{ere practical altern}^ativ^es^{do not ex}^is^t,^m^a^inten^aⁿ^{ce or oth}^e^r
^activ^itie^s^m^a^y^{be acco}^m^p^li^sh^e^d^th^rou^g^h^t^h^{e occas}^ion^a^l^u^s^{e o}^f^m^o^{torized equ}ⁱ^p^m^en^{t.... S}^u^ch
^m^o^to^rⁱ^zed^eq^uⁱ^p^m^eⁿ^t^u^s^e^s^w^illⁿ^o^r^m^all^y^b^e^p^e^r^mⁱ^ttedⁱⁿ^th^o^s^{e p}^o^r^tioⁿ^s^o^f^a^wⁱ^ld^erⁿ^e^s^s^ar^ea
^w^h^{ere th}^e^y^h^a^{d occu}^{rred prior}^{to th}^{e area’}^s^de^sⁱ^gn^atioⁿ^as^wⁱ^ldern^e^s^s^{or are es}^tablis^h^e^{d b}^y
^{prior ag}^reem^eⁿ^t.
^T^h^{e co}ⁿ^s^tr^u^c^tioⁿ^o^fⁿ^e^wⁱ^m^p^r^o^v^e^m^eⁿ^{ts o}^r^r^e^p^l^ace^m^eⁿ^t^o^f^d^e^terⁱ^o^r^ated^f^{acilities in}
^w^ilderⁿ^e^s^s^is^per^mⁱ^s^sⁱ^{ble i}^fⁱⁿ^accordan^ce^w^ith^th^e^s^{e gu}^id^elin^es^aⁿ^d^m^aⁿ^a^g^e^m^eⁿ^t^plaⁿ^s
^g^o^v^e^rning^t^h^{e area in}^v^o^l^v^ed....
^T^h^{e u}^s^{e of}^m^o^{torized equ}ⁱ^p^m^eⁿ^t^f^o^{r e}^m^erg^eⁿ^c^y^pu^rpos^es^s^u^c^h^as^re^s^c^uⁱ^ng^sⁱ^c^k^aⁿⁱ^m^al^s
^{or th}^{e place}^m^eⁿ^t^o^f^f^{eed in}^e^m^erg^eⁿ^c^y^sⁱ^t^u^atioⁿ^s^is^al^s^o^perm^is^sⁱ^ble.
Appendix B of H.Rept. 101-405 (pages 44-51) is “Wildlife Management Guidelines.” It provides
guidance similar to the grazing guidelines in Appendix A of H.Rept. 101-405, and reads in part:
^T^h^{is lan}^g^u^a^g^e^[^§⁴⁽^c)^o^f^th^e^W^ild^erⁿ^e^ss^A^c^t]^{is v}ⁱ^e^w^ed^as^dⁱ^r^ectioⁿ^th^{at all m}^aⁿ^a^g^e^m^eⁿ^t
^activ^itie^{s w}ⁱ^thⁱⁿ^wⁱ^ld^erⁿ^e^s^s^b^e^d^oⁿ^{e w}ⁱ^t^h^o^u^{t m}^o^to^r^v^e^hⁱ^cl^{es, m}^o^to^rⁱ^zed^eq^uⁱ^p^m^eⁿ^t,^o^r
^m^ech^aⁿ^{ical tra}ⁿ^s^{port, u}ⁿ^l^es^s^tru^l^yⁿ^eces^s^a^r^y^{to adm}ⁱⁿⁱ^s^t^{er th}^{e area o}^r^are^s^p^ecifⁱ^call^y
^permⁱ^t^t^e^{d b}^y^ot^h^e^{r prov}ⁱ^sⁱ^oⁿ^sⁱⁿ^t^h^e^A^c^t^.^It^m^e^aⁿ^s^t^h^at^a^{ny s}^u^c^h^us^{e sh}^ou^l^d^{be rare an}^d
^te^m^p^o^r^ar^y^;^th^atⁿ^o^r^o^ad^{s can}^b^e^b^u^{ilt; an}^d^th^at^w^ild^erⁿ^e^ss^m^aⁿ^a^g^e^r^s^m^u^s^t^d^e^t^e^r^mⁱⁿ^e^su^c^h^u^s^e
^is^th^e^mⁱⁿⁱ^m^u^mⁿ^eces^s^a^r^y^to^accom^p^lis^h^t^h^{e tas}^k^.^Any^us^{e of}^m^o^{torized equ}ⁱ^p^m^eⁿ^{t or}
^m^ech^aⁿ^{ical tra}ⁿ^s^{port requ}^ires^adv^aⁿ^{ce approv}^{al b}^y^th^{e ad}^mⁱⁿⁱ^s^t^eriⁿ^g^ag^eⁿ^c^y^....
^Flo^w^-m^aiⁿ^t^eⁿ^an^{ce da}^m^s^,^w^a^t^e^{r dev}^e^lop^m^en^t^s^,^w^a^{ter di}^v^e^r^s^ion^de^vⁱ^ces^{, ditc}^h^e^s^an^d
^a^s^s^o^cⁱ^a^t^e^d^s^t^r^u^c^t^ur^e^s^,^aⁿ^d^o^t^he^r^fi^s^h^aⁿ^d^wⁱ^l^d^lⁱ^fe^ha^bⁱ^t^a^t^d^e^ve^l^o^p^m^eⁿ^tsⁿ^eces^s^a^r^y^f^o^r^fⁱ^s^h^aⁿ^d

³^T^h^e^a^u^thorⁱ^t^y^{to e}^s^ta^blis^h^ne^w^mⁱ^ne^r^a^{l r}ⁱ^g^h^ts^e^x^pir^e^{d i}ⁿ¹⁹^83.^No^a^tte^m^p^{ts to e}^s^ta^blis^{h ne}^w^rig^h^{ts we}^re^a^tte^m^p^te^d
^until^the^R^e^a^g^aⁿ^A^d^mⁱ^nis^t^r^a^tion,^a^{nd t}^h^eⁿ^C^ong^r^e^s^s^inc^l^u^d^e^d^pr^ovⁱ^s^ionsⁱⁿ^t^h^e^Iⁿ^te^rⁱ^or^a^p^pr^o^p^rⁱ^a^tioⁿ^s^a^c^t^s^pr^ohi^biti^ng
^e^s^ta^blishing^ne^w^mⁱ^ne^ra^{l rig}^h^{ts until t}^h^e^W^ilde^r^ne^{ss A}^c^{t’s e}^x^pira^ti^on^of^tha^t^a^u^t^hority^.

^wⁱ^l^d^lⁱ^fe^m^a^na^ge^me^nt⁽^w^hi^c^h^w^e^r^eⁱⁿ^e^xⁱ^s^t^e^nc^e^b^e^fo^r^e^wⁱ^l^d^e^r^ne^{ss d}^e^sⁱ^gⁿ^a^tⁱ^oⁿ⁾^m^a^{y b}^e
^p^e^r^mⁱ^tted^to^r^e^m^aⁱⁿⁱⁿ^o^p^e^r^a^tioⁿ^.
Appendix B provides additional direction and examples of authorized activities for various
specific fish and wildlife management activities, including population surveys and sampling, fish
stocking, wildlife transplanting, and more.
These appendices to H.Rept. 101-405 have been referenced in many subsequent wilderness
statutes as relevant guidance for administering grazing and wildlife in the designated wilderness
areas.

In addition to the special provisions in the Wilderness Act that allow otherwise-prohibited
activities in some circumstances, many subsequent laws designating units of the National
Wilderness Preservation System have authorized specific uses or activities that do not conform
with the general prohibitions on access to and use of wilderness areas. Typically these provisions
apply to one or a few areas, although occasionally the provisions apply to all the areas designated
in the statute. These provisions are identified below, grouped into several categories and arranged
chronologically from the earliest enactment within each category.
The subsequently enacted provisions in wilderness statutes are generally to allow access to one or
more areas for continued motorized access, often for provide for maintenance of pre-existing
facilities, for continued wildlife management activities, or for continued use of pre-existing
rights-of-way.
• P.L. 95-237, Endangered American Wilderness Act of 1978: §2(i) allows local
government access for maintaining current and future watershed facilities in one
unit in Utah.
• P.L. 95-249, Absaroka-Beartooth Wilderness Act: §4 preserves a right-of-way
claim in one unit being litigated at that time.
• P.L. 95-495, Boundary Waters Canoe Area Wilderness Act: §4(e) allows
snowmobile use in certain units; §4(d) and §4(g) allow mechanized portages in
certain units; §4(h) allows continued motorized uses only; and §4(i) allows
motorized access for emergencies and administrative purposes.
• P.L. 96-487, Alaska National Interest Lands Conservation Act of 1980: §703(b)
allows mechanized portage equipment in a specific unit.
• P.L. 96-560, Colorado Wilderness Act of 1980: §102(a)(17) allows motorized
access for maintenance of water resource facilities in one unit.
• P.L. 98-425, California Wilderness Act of 1984: §101(a)(2) and (25) allow
continued access for livestock facilities in two specific units; §101(a)(6) allows
motorized administrative use of a fire road between contiguous wilderness units;
and §101(a)(24) allows a right-of-way for construction.

• P.L. 98-428, Utah Wilderness Act of 1984: §302(b) allows access for local
government to maintain current and future watershed facilities in 9 of the 12
wilderness units designated.
• P.L. 98-550, Wyoming Wilderness Act of 1984: §201(a)(11) allows motorized
federal access for bighorn sheep management in one designated unit.
• P.L. 101-628, Arizona Desert Wilderness Act of 1990: §101(a)(3) allows access
for operating and maintaining a pipeline in one unit; §101(a)(20) provides access
and use of a powerline right-of-way in one unit; and §101(k) allows continued
use and maintenance of a particular road.
• P.L. 102-301, Los Padres Condor Range and River Protection Act: §2(5) allows
continued use of a road corridor in one unit until a bypass is completed.
• P.L. 103-77, Colorado Wilderness Act of 1993: §8(d) allows motorized access for
use, operation, maintenance, repair, and replacement of water resource facilities
in existence upon enactment in all designated units.
• P.L. 103-433, California Desert Protection Act of 1994: §102(1) and (13) provide
rights-of-way for military access across two designated units; §103(f) allows
state motorized access for wildlife management; and §708 guarantees access to
nonfederal lands within all designated units.
• P.L. 106-456, Spanish Peaks Wilderness Act of 2000: §3(a) allows continued
historic uses of the Bulls Eye Mine Road.
These provisions are to allow continued use of motorboats, sometimes with more restrictive
conditions, for lakes or watercourses within the designated wilderness areas.
• P.L. 93-429, Okefenokee National Wildlife Refuge Wilderness Act: §2(1) allows
powered watercraft of 10 horsepower or less within the unit.
• P.L. 95-495, Boundary Waters Canoe Area Wilderness Act: §4(c) identifies
horsepower limits and duration (some access is temporary) for motorboats in
specific counties and/or lakes within the unit; and §4(f) limits motorboat use to
historic levels, except for homeowners.
• P.L. 98-430, Florida Wilderness Act of 1984: §1(4) allows continued motorboat
use in one unit.
Originally, these provisions were to allow for continued aircraft landing within a wilderness area
or for helicopter access for sanitary facilities. Since 1990, several wilderness statutes have
included provisions to allow low-level military overflights of wilderness areas.
• P.L. 95-237, Endangered American Wilderness Act of 1978: §2(i) allows
helicopter access for sanitary facilities in one unit in Utah.
• P.L. 96-312, Central Idaho Wilderness Act of 1980: §7(a)(1) allows continued
landing of aircraft within a designated unit.

• P.L. 98-428, Utah Wilderness Act of 1984: §302(b) allows helicopter access for
sanitary facilities in 10 of the 12 designated units.
• P.L. 101-628, Arizona Desert Wilderness Act of 1990: §101(I) directs that
“nothing in this title shall preclude low level overflights of military aircraft, the
designation of new units of special airspace, or the use or establishment of
military flight training routes over wilderness areas designated by this title.”
• P.L. 104-433, California Desert Protection Act of 1994: Title VIII, the California
Military Lands Withdrawal and Overflights Act of 1994, §802 authorizes low
level overflights of military aircraft, special airspace units, and military flight
training routes over wilderness areas.
• P.L. 106-65, National Defense Authorization Act for FY2000: §3032 authorizes
low level overflights of military aircraft, special airspace units, and military flight
training routes over the Cabeza Prieta Wilderness designated by §301(a)(4) of
P.L. 101-628.
• P.L. 107-282, Clark County Conservation of Public Land and Natural Resources
Act of 2002: §205 authorizes low level overflights of military aircraft, special
airspace units, and military flight training routes over wilderness areas.
• P.L. 107-370, Big Sur Wilderness and Conservation Act of 2002: §5 authorizes
low level overflights and non-motorized access for military training.
• P.L. 108-424, Lincoln County Conservation, Recreation, and Development Act of
2004: §206 authorizes low level overflights of military aircraft, special airspace
units, and military flight training routes over wilderness areas.
• P.L. 109-163, National Defense Authorization Act for FY2006: Title III, Subtitle
H, Utah Test and Training Range, §382 (b) and (c) authorizes low level
overflights of military aircraft, special airspace units, and military flight training
routes over the wilderness area designated in the act.
• P.L. 109-362, Northern California Coastal Wild Heritage Wilderness Act: §4(h)
authorizes low level overflights of military aircraft.
• P.L. 110-229, Consolidated Natural Resources Act of 2008: §101(b)(4) authorizes
continued use of float planes on one lake.
As noted above, the Wilderness Act allows the President to authorize water project developments
in wilderness areas designated by Congress. Subsequent statutes typically address access for
construction, operation, and maintenance of water infrastructure within specific wilderness areas.
Two recent laws have included provisions prohibiting presidential authorization of new water
projects in wilderness areas designated by the acts.
• P.L. 95-237, Endangered American Wilderness Act of 1978: §2(e) protects rights
for water diversion and use, including operations, maintenance, repair, and
replacement of water project facilities in one unit in Colorado.
• P.L. 96-550, New Mexico Wilderness Act of 1980: §102(a)(9) retains existing
management, rules, and regulations for a municipal watershed in one unit.

• P.L. 96-560, Colorado Wilderness Act of 1980: §102(a)(5) protects rights for
water diversion and use, including operation, construction, maintenance, and
repair of water project facilities in one unit.
• P.L. 98-425, California Wilderness Act of 1984: §101(a)(25) protects rights for
water diversion and use, including construction, operation, maintenance, and
repair of water project facilities in one unit.
• P.L. 98-550, Wyoming Wilderness Act of 1984: §201(c) protects rights for water
diversion and use, including construction, operation, maintenance, and
modification of water project facilities in four units.
• P.L. 101-628, Arizona Desert Wilderness Act of 1990: §101(l) protects flood
control dam operations in one unit; and §301(e) and §302 direct that the two units
abutting the Colorado River shall have no effect on upstream dams or on water
management in the Upper Colorado River Basin, respectively.
• P.L. 103-77, Colorado Wilderness Act of 1993: §2(a)(13) protects rights for water
diversion and use, including construction, operation, use, maintenance, and repair
of water project facilities in one unit.
• P.L. 103-433, California Desert Protection Act of 1994: §202 and §203 direct
that the two units abutting the Colorado River shall have no effect on upstream
dams or on water management in the Upper Colorado River Basin, respectively.
• P.L. 107-282, Clark County Conservation of Public Land and Natural Resources
Act of 2002: §208(d) authorizes structures and facilities for wildlife water
development projects, if the Secretary of the Interior determines they will
enhance wilderness values and if the visual impacts “can reasonably be
mi nimi ze d.”
• P.L. 107-370, Big Sur Wilderness and Conservation Act of 2002: §8 authorizes
construction and maintenance of a new water line and corresponding spring box
adjacent to an existing domestic water service in one unit.
• P.L. 108-424, Lincoln County Conservation, Recreation, and Development Act of
2004: §204(d)(4) prohibits most water facility development in the designated
areas, except for wildlife water facilities, as authorized in §209(d), if the
Secretary of the Interior determines they will enhance wilderness values and if
the visual impacts “can be reasonably minimized.”
• P.L. 109-94, Ojito Wilderness Act: §3(i)(4) prohibits water facility development
in the area, except for “wildlife guzzlers.”
Numerous other structures and activities within designated areas have been authorized in
wilderness statutes. Most authorize continued access or maintenance of pre-existing structures.
Several have included a provision allowing the installation and maintenance of weather-related
equipment and facilities.
• P.L. 95-237, Endangered American Wilderness Act of 1978: §2(c) and §2(d)
allow fire prevention and watershed protection activities in two units.

• P.L. 96-312, Central Idaho Wilderness Act of 1980: §5(d)(1) allows prospecting
and exploration for and development of cobalt within part of one unit.
• P.L. 96-550, New Mexico Wilderness Act of 1980: §102(a)(5) allows construction
of additional fencing for livestock grazing in one unit.
• P.L. 97-384, Charles C. Deam Wilderness Act: §3 allows access to and
maintenance of a cemetery in one unit in Indiana.
• P.L. 98-322, Vermont Wilderness Act of 1984: §104(c) allows maintenance of
trails and associated facilities in all designated units.
• P.L. 98-406, Arizona Wilderness Act of 1984: §101(a)(13) allows installation and
maintenance of hydrological, meteorological, and telecommunication equipment
in one unit.
• P.L. 98-428, Utah Wilderness Act of 1984: §305 allows installation and
maintenance of hydrological, meteorological, climatological, and communication
equipment in 9 of 12 designated units.
• P.L. 100-668, Washington Park Wilderness Act of 1988: §102 allows the
maintenance, repair, and replacement of an underground powerline through one
unit.
• P.L. 101-195, Nevada Wilderness Act of 1990: §10 allows installation and
maintenance of hydrological, meteorological, and climatological equipment in all
designated units.
• P.L. 101-628, Arizona Desert Wilderness Act of 1990: §301(g) allows continued
border operations within one designated unit.
• P.L. 101-633, Illinois Wilderness Act of 1990: §9 allows access to and
maintenance of a cemetery in one unit.
• P.L. 102-301, Los Padres Condor Range and River Protection Act: §3(b) allows
fire prevention and watershed protection activities in one unit.
• P.L. 103-433, California Desert Protection Act of 1994: §103(g) allows
motorized law enforcement activities within all designated units; and §705(a)
provides for Native American access for cultural and religious purposes.
• P.L. 106-156, Dugger Mountain Wilderness Act of 1999: §2(d) allows motorized
use of a road for two years to disassemble and remove a fire tower that was
scheduled for removal, with the road permanently closed thereafter.
• P.L. 107-282, Clark County Conservation of Public Land and Natural Resources
Act of 2002: §210 authorizes installation and maintenance of hydrological,
meteorological, or climatological equipment in the areas if the facilities “are
essential to flood warning, flood control, and water reservoir operation
activities.”
• P.L. 108-424, Lincoln County Conservation, Recreation, and Development Act of

2004: §211 authorizes installation and maintenance of hydrological,

meteorological, or climatological equipment in the areas if the facilities “are
essential to flood warning, flood control, and water reservoir operation
activities.”

• P.L. 109-118, Caribbean National Forest Act of 2005: §3(d) authorizes
installation and maintenance of hydrological, meteorological, climatological, or
atmospheric facilities in the areas if they “are essential to the scientific research
purposes of the Luquillo Experimental Forest.”
• P.L. 109-362, Northern California Coastal Wild Heritage Wilderness Act: §4(g)
authorizes installation and maintenance of hydrological, meteorological, or
climatological equipment (notably snow sensors and stream gauges) in the areas
“to further the scientific, educational, and conservation purposes” of the areas.
• P.L. 109-382, New England Wilderness Act of 2006: §213(c) authorizes
continuance of the Appalachian National Scenic Trail, the Long Trail, and the
Catamount Trail, and the marking and maintenance of the trails and associated
structures, consistent with the Green Mountain National Forest Plan.
• P.L. 110-229, Consolidated Natural Resources Act of 2008: §101(b)(3) authorizes
helicopter access to construct and maintain a telecommunication repeater site and
§101(b)(5) authorizes continued operation and maintenance of a fire lookout
station.
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