FINAL ENVIRONMENTAL ASSESSMENT

KAPUNA WATERSHED PROTECTION PROJECT

PAHOLE NATURAL AREA RESERVE

Kapuna and Keawapilau Drainages

Pahole Natural Area Reserve & Mokuleia Forest Reserve

Waialua District

Northern Wai‘anae Mountains

Island of O‘ahu

In accordance with

Chapter 343, Hawai‘i Revised Statutes

Proposed by:

State of Hawai‘i

Department of Land and Natural Resources

Division of Forestry and Wildlife

Natural Area Reserves System

1151 Punchbowl Street, Room 224

Honolulu, Hawai‘i 96813

October 2003





Project Name Kapuna Watershed Protection Project

Pahole Natural Area Reserve

Project Location Kapuna and Keawapilau Drainages

Pahole Natural Area Reserve/Mokuleia Forest Reserve

Waialua District

Northern Wai‘anae Mountains

Island of O‘ahu

TMK 1-6-8-001-002 (State of Hawai‘i) (Pahole NAR)

TMK 1-6-8-001-001 (State of Hawai‘i) (Mokuleia FR)

Land Use Conservation District, Protective Subzone

Proposing Agency State of Hawai‘i

Department of Land and Natural Resources

Division of Forestry and Wildlife

Natural Area Reserves System

Approving Agency State of Hawai‘i

Department of Land and Natural Resources

Agencies Consulted Federal: U.S. Army Garrison, Hawai‘i

U.S. Department of Agriculture, Natural

Resources Conservation Service

U.S. Department of Interior, Fish and

Wildlife Service

U.S. Geological Survey, Biological

Resources Division

State: Department of Agriculture

Department of Business, Economic

Development and Tourism, Office of Planning

Department of Defense

Department of Hawaiian Home Lands

Department of Health

Department of Land and Natural Resources

Division of Conservation and

Resource Enforcement

Division of Forestry and Wildlife

Division of Historic Preservation

Division of Land Management

Division of State Parks

NARS Commission

Office of Conservation and Coastal

Lands

Land Use Commission

Office of Hawaiian Affairs

2

Office of Environmental Quality Control

University of Hawai‘i, Dr. Michael

Hadfield

University of Hawai‘i, Environmental

Center

County: Board of Water Supply

Department of Planning and Permitting

North Shore Neighborhood Board

Wahiawa Neighborhood Board

Waianae Neighborhood Board

Private: Ahahui Malama I Ka Lokahi

Bishop Museum

Conservation Council of Hawai‘i

Earthjustice Legal Defense Fund

Hawai‘i Audubon Society

Hawai‘i Trail and Mountain Club

Historic Hawai‘i Foundation

Ilio‘ulaokalani Coalition

Kahea – the Hawaiian Environmental

Alliance

Ko‘olau Mountains Watershed Partnership

O‘ahu Invasive Species Committee

Pig Hunters Association of O‘ahu

Sierra Club, Oahu Chapter

The Nature Conservancy of Hawai‘i

Waialua Hawaiian Civic Club

Waianae Hawaiian Civic Club

Steve Montgomery

Jonah Ioane

Summary of Action

The Hawai‘i Department of Land and Natural Resources, Division of

Forestry and Wildlife proposes to construct a network of fences in the

uppermost portion of the Kapuna and Keawapilau drainages, between the 1,500

and 2,590 foot elevation, in the Pahole Natural Area Reserve and extending

slightly into the Mokuleia Forest Reserve, in the northern Wai‘anae Mountains

on the island of O‘ahu. By eliminating the destructive impact of feral pigs in

the project area, this project is directed at the protection of the watershed as

well as rare and endangered species.

The proposed fencing will have a combined length of approximately 3.5

miles, enclosing approximately 235 acres. The proposed action is part of an

ongoing effort by DOFAW, USFWS, the United States Army, hunting clubs, and

community volunteers to protect native ecosystems, watershed, and habitat for

native species. At least eighteen species of listed, proposed, candidate or rare

3

plants and several rare and/or endangered native snail species are found in the

project area.

Fence construction will involve hand clearing of a corridor no more than

10 feet wide and erecting a fenceline. The planned fence will be approximately

three feet tall, made of hogwire. Where necessary, the outside of the fence will

be skirted along the base with a hogwire apron. Management activities planned

after the fence is completed include feral animal and weed control and

outplanting of native species to restore the dryland forest.

Potential impacts include short-term increase in soil disturbance along the

fenceline, disturbance and damage to common native plants, and effects on rare

and endangered plant and animal species, cultural resources, public hunting, and

the Mokuleia Trail. Impact mitigation measures include conducting expert

surveys of the fence route to ensure that no biological or cultural resources are

within the fence clearing corridor, implementing measures to decrease the

potential for accidental introduction of non-native species, and retaining the

integrity of the Mokuleia Trail.

II. PROJECT PURPOSE & NEED

The Hawaiian Islands are known as the endangered species capital of the

world. Approximately half the native rain forest and 90 percent of the native

dry forest in Hawai‘i have been lost. Over one-third of the threatened and

endangered species in the United States are unique to Hawai‘i, and more plant

and bird extinctions have been recorded from the islands than anywhere else in

the country.

The Natural Area Reserves System (NARS) was established in 1970 by the

State Legislature to “preserve in perpetuity specific land and water areas which

support communities, as relatively unmodified as possible, of the natural flora

and fauna, as well as geological sites, of Hawaii.” Chapter 195, HRS. The 658-

acre Pahole Natural Area Reserve was established in 1981 to protect rare

lowland native mesic and dry forest and habitat for endangered species. Pahole

Natural Area Reserve supports the endangered O‘ahu ‘elepaio (

sandwichensis ibidis

at least 18 species of endangered plants, candidate plants, and plant species of

concern, and additional native species of plants and animals.

The Forest Reserve System was established in 1903 to protect the vital

mountain watersheds. The Mokuleia Forest Reserve surrounds Pahole Natural

Area Reserve and also supports the endangered O‘ahu ‘elepaio as well as

various species of rare, threatened and endangered plants.

The proposed action focuses on protecting some of the best examples of

lowland native mesic forest remaining in the Hawaiian Islands. Protecting and

actively managing native ecosystems on a landscape level is necessary to secure

the long-term viability of these systems and to recover endangered species. The

4

ecosystem approach to managing the Pahole Natural Area Reserve is consistent

with the NARS mandate to protect natural communities in perpetuity. This

strategy is also consistent with the USFWS policy of protecting large, intact,

native ecosystems whenever possible.

The proposed action will reduce the negative impacts of feral pigs on

native forest, watershed, and habitat for native plants and animals, including

endangered species. The installation of a ridgeline fence by the U.S. Army

Garrison Hawai‘i along the entire southeastern border of the Reserve and

continuing east on the crest of West Makaleha Gulch has resulted in a dramatic

increase in feral pig activity in the upper Kapuna and Keawapilau drainages.

Feral pigs pose a major threat by consuming and destroying native understory

plants, creating conditions favoring non-native plant infestation and

establishment, preventing the establishment of ground-rooting native plants, and

disrupting soil nutrient cycling. The cumulative effect of these activities is the

decline of native forests, watersheds, and suitable habitat for native plants and

animals.

The proposed action will enhance the Wai‘anae Mountains watershed,

which serves the North Shore and Leeward O‘ahu communities. Fencing and

removing feral pigs will enhance surface and ground water resources by

reducing soil erosion and runoff.

The project area, Pahole Natural Area Reserve and Mokuleia Forest

Reserve, is State owned land within the Conservation District, which triggers

the need for an Environmental Assessment to be written in accordance with

Chapter 343, HRS.

Chasiempis), the endangered O‘ahu tree snail (Achatinella mustelina),

I. SUMMARY

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  • Summary of Action

    The Hawai‘i Department of Land and Natural Resources, Division of

    Forestry and Wildlife proposes to construct a network of fences in the

    uppermost portion of the Kapuna and Keawapilau drainages, between the 1,500

    and 2,590 foot elevation, in the Pahole Natural Area Reserve and extending

    slightly into the Mokuleia Forest Reserve, in the northern Wai‘anae Mountains

    on the island of O‘ahu. By eliminating the destructive impact of feral pigs in

    the project area, this project is directed at the protection of the watershed as

    well as rare and endangered species.

    The proposed fencing will have a combined length of approximately 3.5

    miles, enclosing approximately 235 acres. The proposed action is part of an

    ongoing effort by DOFAW, USFWS, the United States Army, hunting clubs, and

    community volunteers to protect native ecosystems, watershed, and habitat for

    native species. At least eighteen species of listed, proposed, candidate or rare

    3

    plants and several rare and/or endangered native snail species are found in the

    project area.

    Fence construction will involve hand clearing of a corridor no more than

    10 feet wide and erecting a fenceline. The planned fence will be approximately

    three feet tall, made of hogwire. Where necessary, the outside of the fence will

    be skirted along the base with a hogwire apron. Management activities planned

    after the fence is completed include feral animal and weed control and

    outplanting of native species to restore the dryland forest.

    Potential impacts include short-term increase in soil disturbance along the

    fenceline, disturbance and damage to common native plants, and effects on rare

    and endangered plant and animal species, cultural resources, public hunting, and

    the Mokuleia Trail. Impact mitigation measures include conducting expert

    surveys of the fence route to ensure that no biological or cultural resources are

    within the fence clearing corridor, implementing measures to decrease the

    potential for accidental introduction of non-native species, and retaining the

    integrity of the Mokuleia Trail.


    II. PROJECT PURPOSE & NEED


    The Hawaiian Islands are known as the endangered species capital of the

    world. Approximately half the native rain forest and 90 percent of the native

    dry forest in Hawai‘i have been lost. Over one-third of the threatened and

    endangered species in the United States are unique to Hawai‘i, and more plant

    and bird extinctions have been recorded from the islands than anywhere else in

    the country.

    The Natural Area Reserves System (NARS) was established in 1970 by the

    State Legislature to “preserve in perpetuity specific land and water areas which

    support communities, as relatively unmodified as possible, of the natural flora

    and fauna, as well as geological sites, of Hawaii.” Chapter 195, HRS. The 658-

    acre Pahole Natural Area Reserve was established in 1981 to protect rare

    lowland native mesic and dry forest and habitat for endangered species. Pahole

    Natural Area Reserve supports the endangered O‘ahu ‘elepaio (

    sandwichensis ibidis

    at least 18 species of endangered plants, candidate plants, and plant species of

    concern, and additional native species of plants and animals.

    The Forest Reserve System was established in 1903 to protect the vital

    mountain watersheds. The Mokuleia Forest Reserve surrounds Pahole Natural

    Area Reserve and also supports the endangered O‘ahu ‘elepaio as well as

    various species of rare, threatened and endangered plants.

    The proposed action focuses on protecting some of the best examples of

    lowland native mesic forest remaining in the Hawaiian Islands. Protecting and

    actively managing native ecosystems on a landscape level is necessary to secure

    the long-term viability of these systems and to recover endangered species. The

    4

    ecosystem approach to managing the Pahole Natural Area Reserve is consistent

    with the NARS mandate to protect natural communities in perpetuity. This

    strategy is also consistent with the USFWS policy of protecting large, intact,

    native ecosystems whenever possible.

    The proposed action will reduce the negative impacts of feral pigs on

    native forest, watershed, and habitat for native plants and animals, including

    endangered species. The installation of a ridgeline fence by the U.S. Army

    Garrison Hawai‘i along the entire southeastern border of the Reserve and

    continuing east on the crest of West Makaleha Gulch has resulted in a dramatic

    increase in feral pig activity in the upper Kapuna and Keawapilau drainages.

    Feral pigs pose a major threat by consuming and destroying native understory

    plants, creating conditions favoring non-native plant infestation and

    establishment, preventing the establishment of ground-rooting native plants, and

    disrupting soil nutrient cycling. The cumulative effect of these activities is the

    decline of native forests, watersheds, and suitable habitat for native plants and

    animals.

    The proposed action will enhance the Wai‘anae Mountains watershed,

    which serves the North Shore and Leeward O‘ahu communities. Fencing and

    removing feral pigs will enhance surface and ground water resources by

    reducing soil erosion and runoff.

    The project area, Pahole Natural Area Reserve and Mokuleia Forest

    Reserve, is State owned land within the Conservation District, which triggers

    the need for an Environmental Assessment to be written in accordance with

    Chapter 343, HRS.

    Chasiempis), the endangered O‘ahu tree snail (Achatinella mustelina),

    • The project involves constructing a network of fences around four habitat

      management units that still support relatively intact native forest, watershed,

      and habitat for native species. The habitat management units range in size from

      eight to 207 acres. A perimeter fence will be installed around the fenced habitat

      management units, protecting a total of approximately 235 acres. The fences

      will be approximately three feet high with a combined length of approximately

      3.5 miles.

      The proposed fencing is located primarily within Pahole Natural Area

      Reserve, but extends into a portion of the Mokuleia Forest Reserve to the east of

      Pahole. The proposed fence line was selected based on the need to minimize

      impacts of fence construction on native plant communities; ease of fence

      installation and maintenance; and long-term survival of the fences from

      vegetative encroachment, erosion, and slides.

      The fences will be constructed on remote ridges dominated by non-native

      plants to avoid disturbing sensitive species, slopes, and gulches. Helicopters

      and existing trails and roads will be used to transport fence materials and crews.

      A corridor no wider than 10 feet along the proposed fence line will be cleared

      by hand and with small power tools, if necessary. The fences will be made of

      steel and wood posts, hog wire, and a single strand of barbed wire along the

      bottom of the fence to prevent feral pigs from entering the fenced areas. Where

      necessary, the fences also will be skirted along the bottom of the fence with a

      horizontal 24-inch wide wire apron.

      The fenceline crosses the Mokuleia Trail in two locations. Gates or stiles

      will be constructed at these locations to preserve access along the trail for

      public users, such as hikers and hunters, and for resource managers conducting

      management activities within the Natural Area Reserve.

      Once the fences have been installed, feral pigs will be removed from the

      fenced areas. A comprehensive threat-control program will be implemented,

      invasive weed species and predatory rats (

      controlled, and human disturbance minimized.

      Rattus spp.) will be monitored and

      Fencing Specifications


      Fence construction will involve driving steel T-posts and treated wood

      posts into the ground no more than 10 feet apart along the fence routes using

      powered drills and post pounders. One strand of galvanized barbed wire will be

      clipped to the posts and nailed to the poles at ground level. Bezinol-coated hog

      wire will be stretched and clipped or nailed to the standing posts and poles.

      Bezinol steel pins will be used as anchors within each 10-foot span. Where

      necessary, the bottom of the fence will be anchored with posts to ensure that the

      wire fabric is kept close to the ground. A 24-inch-wide apron of hog wire will

      be laid horizontally on the ground and attached to the outside of the standing

      fence where needed to curtail pig grubbing and consequent erosion along the

      fences.

      6


      Timing & Costs


      Fence construction is planned to occur in two phases because of funding

      constraints. Units 1, 2 and 3 will be constructed sequentially during Phase I of

      the project, and Unit 4 will be constructed during Phase II. Units 1, 2 and 3

      will create three separate fenced exclosures, while Unit 4 is a perimeter fence

      that will enclose a larger area that includes Units 1, 2 and 3. (See map in

      Appendix A).

      The cost estimates for each unit are as follows:


      Item Unit 1 Unit 2 Unit 3 Subtotal Unit 4 Total


      Linear feet

      of Fencing

      3,080 1,509 4,307 8,896 9,518 18,414

      Supplies/

      Fencing

      Materials

      $6,006 $2,943 $8,399 $17,348 $18,560 $35,908

      Fence line

      clearing

      $8,121 $3,967 $11,412 $23,500 $15,648 $39,148

      Fence

      Construction

      (Labor

      Costs)

      $15,400 $7,545 $21,535 $44,480 $128,493 $172,973

      Helicopter

      Sling Loads

      $1,440 $1,440 $1,440 $4,320 $4,320 $8,640

      Totals $30,967 $15,895 $42,786 $89,648 $167,021 $256,669

      Material costs are based on a cost of $1.95 per foot of fence constructed.

      Fencing materials for all phases of the project have been purchased and

      currently being stored at the Pahole Rare Plant Nursery.

      Fence clearing costs are based on a labor cost of $13.50 per hour plus

      15% benefits. The amount of time estimated for fence clearing for Units 1, 2

      and 3 is based on the amount of time it took to clear a similar amount of fence

      line on the original fence constructed in the Pahole Natural Area Reserve in

      1995-1996. The clearing cost for each of the 3 units is based on the percentage

      of linear feet of fence that contributed to the combined total of the three units.

      The amount of time estimated for fence clearing for Unit 4 is based on past

      experience and the terrain.

      Fence construction costs are based on cost estimates obtained from an

      experienced fencing contractor. The cost for fence construction is estimated at

      $5.00 per linear foot for Units 1, 2 and 3 and at $12.00 to $15.00 per linear foot

      for Unit 4. The estimate for Unit 4 is higher because of the steepness of the

      terrain and because the proposed fenceline crosses several gulches. Construction

      costs in the table above utilize a cost of $13.50 per linear foot.

      The funds for the fence materials were provided to DOFAW in a grant of

      $36,000 from the U.S. Fish & Wildlife Service. Fence clearing will be

      7

      completed by DOFAW personnel with help from cooperating natural resource

      organizations such as The Nature Conservancy and the U.S. Army

      Environmental staff, or by contract labor supervised by DOFAW staff, or a

      combination of the above. Additional funds for fence construction labor will be

      provided through an Endangered Species Act Section 6 Candidate Conservation

      Grant in the amount of $35,250.

      Construction of Units 1, 2 and 3 will proceed as soon as all necessary

      approvals have been granted and is estimated to commence in the third quarter

      of 2003. Construction of these Units should take approximately one year.

      While the materials for the construction of Unit 4 have been purchased,

      the State will be seeking additional funds for construction of Unit 4. The timing

      of Phase II of this project depends upon the availability of additional funds for

      construction.


      IV. SUMMARY DESCRIPTION OF AFFECTED ENVIRONMENT


      The proposed fencing is located primarily within Pahole Natural Area

      Reserve, enclosing a small portion of the Mokuleia Forest Reserve to the east of

      Pahole. Pahole Natural Area Reserve is surrounded by the United States Army’s

      Makua Military Reservation to the west, the Mokuleia Forest Reserve to the

      northeast and southwest, and privately owned pasture to the northeast adjacent

      to the lowermost boundary of the Reserve.

      Pahole Natural Area Reserve occupies 658 acres on the northeastern face

      of the Wai‘anae Mountain Range in the district of Waialua on the island of

      O‘ahu. Mokuleia Forest Reserve occupies approximately 3,341 acres, to the

      east and west of Pahole Natural Area Reserve. The project area is located

      entirely within the Conservation District, within the Protective subzone.

      Pahole Natural Area Reserve ranges in elevation from approximately

      1,200 to 2,590 feet, and receives an average annual rainfall of 57 to 66 inches.

      The runoff is rapid, and erosion occurs on the well-drained soils on slopes along

      drainage ways. Eroded spots, stony areas, and outcrops are present in the

      Reserve. The lower elevations of the Reserve contain dark friable soils with a

      surface layer of silt clay that is moderately to strongly acidic. At the upper

      elevations, the well-drained soil is strongly to extremely acidic. The surface

      layer of this soil is reddish-brown silt clay overlying ironstone or saprolite.

      Environmental conditions for the portion of Mokuleia Forest Reserve within the

      project area are similar to those of Pahole Natural Area Reserve.

      A privately controlled paved road to the abandoned Nike site and Pahole

      Rare Plant Nursery runs close to the north side of the Reserve. A jeep trail

      abuts the paved road near Peacock Flat and traverses the Mokuleia Forest

      Reserve upslope to the Mokuleia Trail head and Pahole Natural Area Reserve

      entrance. The trail continues into Pahole Natural Area Reserve, runs along its

      eastern boundary, and continues beyond the Reserve’s northeastern boundary.


      • The Pahole Natural Area Reserve is accessible to the public by way of an

        improved road and the Mokuleia Trail. Activities that are compatible with the

        NARS mandate are allowed, including scientific research, hiking on designated

        trails, camping, public hunting during designated seasons, and cultural practices

        are allowed in the Reserve. Some of these activities require permits. Motorized

        vehicles and mountain bikes are not permitted.


        Flora


        The Pahole Natural Area Reserve protects some of the best examples of

        lowland native mesic and dry forest remaining in the Hawaiian Islands. These

        forests are noted for their species diversity and richness, and are becoming

        increasingly uncommon. Native natural communities within the Reserve include

        koa/‘ohi‘a (

        (

        lowland dry forest, O‘ahu diverse mesic forest, ‘a‘ali‘i lowland dry shrubland,

        and an intermittent stream.

        The species richness in the project area is found in the sub-canopy trees,

        shrubs, and ferns. At least 168 native plant taxa have been reported from the

        Reserve, including 58 rare and endangered species. Several of these plants are

        locally common in the Pahole Natural Area Reserve, but are not found elsewhere

        in Hawai‘i. At least 18 endangered plant species, candidate plant species, and

        plant species of concern are present within the project area and are listed in

        Appendix C.

        A sizeable portion of the Reserve is dominated by non-native vegetation.

        The near extirpation of native plants and their replacement by alien species in

        these areas are the result of rooting, disturbance of native ground cover, and

        weed dispersal by feral pigs.

        Acacia/Metrosideros) lowland mesic forest, ‘ohi‘a/uluheMetrosideros/ Dicranopteris) lowland mesic forest, lonomea (Sapindus)

        Fauna


        Native birds known to occur in the Pahole Natural Area Reserve are the

        ‘apapane (

        Pacific golden plover (

        (

        pairs, has been observed in the project area.

        One species of the endangered O‘ahu tree snail (

        three snail species of concern, and at least three additional snail species have

        been reported from the Reserve. Given the relatively intact condition of the

        native forests in the project area, it can be assumed that the site supports native

        insects and other invertebrates as well. A list of native animals known from the

        Reserve is contained in Appendix D.

        9

        Non-native feral pigs (

        mongooses (

        rosea

        Himatione sanguinea), ‘amakihi (Hemignathus virens), kolea orPluvialis fulva), and the endangered O‘ahu ‘elepaioChasiempis sandwichensis ibidis). One lone male ‘elepaio, but no nestingAchatinella mustelina),Sus scrofa), rats (Rattus spp.), mice (Mus spp.),Herpestes auropunctatus), and the predatory land snail (Euglandina) occur in the Reserve.

        Significant and Sensitive Habitats


        The entire Pahole Natural Area Reserve is considered to be a sensitive

        habitat, particularly for the endangered O‘ahu ‘elepaio (

        sandwichensis ibidis)

        (

        plant species. Pahole Natural Area Reserve has been designated as critical

        habitat for the ‘elepaio and for 25 threatened and endangered plants on O‘ahu by

        the U.S. Fish and Wildlife Service; a list of species with designated critical

        habitat in the project area is contained in Appendix E. The Natural Area

        Reserve also includes lowland native mesic and dry forests, which are becoming

        increasingly rare in Hawai‘i.

        Chasiempis, one species of the endangered O‘ahu tree snailAchatinella mustelina), three snail species of concern, and many rare native

        Archaeological & Cultural Resources


        An archaeological reconnaissance of the planned fence route was

        performed by Loren Zulick, Cultural Resources Specialist, Environmental

        Division, Directorate of Public Works (DPW), U.S. Army Garrison Hawai‘i to

        assess the potential impacts to known and previously unrecorded cultural sites.

        The full report is included as Appendix F.

        The archaeological reconnaissance survey involved walking the entire

        planned route for the fenceline. No extant cultural resources on the surface of

        the ground, including temporary shelters or other natural or constructed

        features, were observed within the project area. In addition, no cultural

        resources or historic properties were identified along the proposed fenceline

        routes. The closest known cultural site is State Site #50-80-03-5920, a

        habitation/agricultural complex located within Makua Valley, 1,000 meters to

        the southwest. The report concluded that Site 5920 would not be impacted by

        the proposed project.

        The report also noted that construction of the proposed exclosures may

        impact the Mokuleia Trail, as the fence will cross the trail twice, and suggested

        mitigation measures to minimize the potential impact. The report concluded

        that no cultural resources will be impacted by the proposed project.

        A search for relevant studies at the University of Hawai‘i and in the

        Hawaiian and Pacific Collection did not turn up any historical information

        regarding the site. A review of

        legends, traditions, or other information relating to the project area. Finally,

        during pre-consultation, the Office of Hawaiian Affairs, the Ilio‘ulaokalani

        Coalition, and Kahea – the Hawaiian Environmental Alliance were requested to

        share any information they had regarding traditional use of the area or to

        identify any groups or individuals who may use the area. No traditional or

        cultural practices occurring in the project area were identified through this

        10

        process. Collection of plants within a Natural Area Reserve is restricted and

        requires a Special Use Permit, and there have been no applications for Special

        Use Permits for traditional and cultural activities within Pahole Natural Area

        Reserve. Finally, as the project site is in a remote wilderness, visitation to the

        area apart from hunters and resource managers is minimal and is primarily

        limited to the area surrounding the Mokuleia Trail. Based on all the available

        information, there are no known traditional and cultural activities associated

        with the project area that might be impacted by fence construction.

        Because of the use of Federal funds, the U.S. Fish and Wildlife Service

        (as the funding agency) will be conducting a Section 106 consultation for this

        project.

        Sites of Oahu disclosed no specific sites,

        V. GENERAL DESCRIPTION OF THE ACTION INCLUDING

        ENVIRONMENTAL AND SOCIOECONOMIC CHARACTERISTICS


        Environmental Impacts


        Short-Term Impacts

        The primary short-term environmental impacts of the proposed action are

        associated with fence construction. Disturbance of vegetation will occur along

        the fence line in a corridor no wider than 10 feet. Some common native plants

        may be damaged, but not to any significant degree. Disturbance of the

        vegetation will be limited to areas that do not contain sensitive resources.

        Soil will be disturbed along the proposed fence line. Soil disturbance will

        be short-term, and no changes in the normal runoff or percolation patterns are

        expected. The proposed project may enhance water quality in nearby

        intermittent streams by reducing feral pig activity.

        Noise and air pollution from helicopter sling loads and the use of small

        power tools will be unavoidable during fence construction. Increased human

        activity in the project area resulting from fence construction will be necessary.

        This increase in activity may temporarily disturb native birds in the immediate

        vicinity.

        Long-Term Impacts

        The long-term impacts of the proposed action are associated with the

        proposed fencing and removal of feral pigs, which may alter the vegetation in

        the project area. Fence construction would entail clearing a corridor no wider

        than 10-feet to remove hazards to fence construction crews and facilitate fence

        construction. Although most of the vegetation is expected to grow back, fence

        inspection and maintenance will require that the fence line be kept cleared of

        vegetation. The proposed fence construction may also affect plant species

        known to support the endangered O‘ahu tree snail,

        11

        Soil disturbance along the proposed fence line, as well as the transport of

        fence materials and crews, will increase the potential accidental introduction of

        non-native plants to the project site. Species, such as

        Achatinella mustelina.Triumfetta semitriloba

        and

        construction workers, and new alien species could be introduced.

        Native plant populations, including populations of endangered species,

        should increase in numbers once feral pigs are removed from the fenced areas.

        At the same time, the removal of feral pigs could result in an increase in nonnative

        plants that are currently suppressed by feral pig activity. However, nonnative

        plants that are spread by feral pigs in the proposed fenced areas may

        decrease once the pigs are removed.

        Clidemia hirta, which occur in the project area, could be spread by fence

        Socio-Economic Impacts


        The proposed action will require spending the funds necessary for the

        project. Fencing materials have been purchased, and fence crews and helicopter

        operators will be contracted. Positive economic impacts will result from the

        release of project funds into the O‘ahu economy through the purchase of fence

        materials and employment of fence crews. The proposed action may attract

        additional funding for watershed protection, reforestation, and endangered

        species recovery.

        With respect to long-range planning policies, the project is consistent

        with Section 3.1.3, Guidelines for Open Space and the Natural Environment of

        the North Shore Sustainable Communities Plan, relating to identification and

        protection of endangered species, native ecosystems, and other important

        ecologically sensitive areas and with Section 3.4.3, Planning Guidelines for the

        Preservation of Forest Lands of the Wai‘anae Sustainable Communities Plan,

        relating to the protection of rare and endangered species and preventing the

        introduction of alien species.

        The proposed action will result in the loss of approximately 250 acres to

        public hunting. Under current DOFAW rules, public hunting of game mammals

        in Pahole Natural Area Reserve is restricted, requiring an entry permit from the

        O‘ahu NARS Manager and requiring hunters to be accompanied by a DOFAW

        staff member. The reduction in hunting acreage resulting from the proposed

        action is not expected to be significant because little hunting occurs in the

        relatively remote, upper elevations of the Pahole Natural Area Reserve.

        Further, the project area represents a small portion of the hunting land in the

        general area, most of which will remain open for public hunting in the

        foreseeable future. Finally, the planned fencing will not restrict access for

        hunters crossing Pahole Natural Area Reserve to get to other hunting areas.

        A portion of the proposed fence runs along and crosses the Mokuleia

        Trail. The trail is maintained and is used by hikers, hunters, and naturalists. In

        comparison to other trails on O‘ahu, Mokuleia Trail is not commonly used by

        the public because of the limited vehicular access to the trailhead.

        12

        Fence construction could interfere with public access to portions of the

        Reserve for a short period of time. Appropriate public access to, and use of the

        area will not be affected in the long-term by the proposed action. After fencing,

        the project area will remain open space and will continue to be managed as a

        Natural Area Reserve. Public hiking, nature study, research, cultural practices,

        hunting, and other permitted activities will still be allowed in the Pahole

        Natural Area Reserve, subject to existing NARS rules.

        Finally, the positive socio-economic impacts of the proposed action

        include protecting native forest and watershed in the Wai‘anae Mountains,

        which support the leeward and north shore communities of O‘ahu. The proposed

        fences will contribute to the recovery of unique and critically endangered

        Hawaiian species and create additional opportunities for nature appreciation,

        education, and research.


        Cultural Impacts


        The proposed action is not expected to adversely affect cultural practices.

        As noted earlier, there are no known traditional and cultural activities

        associated with the project area that might be impacted by fence construction.

        Because public access to the area will not be affected in the long-term by the

        proposed action and gates or stiles will be constructed to ensure access where

        the fencing crosses Mokuleia Trail, the project should not impact access for

        Native Hawaiian cultural practices that may be in existence but are currently

        unknown. Construction of fences will have no effect on existing regulations

        restricting the collection of plants in Natural Area Reserves, and thus should not

        affect Native Hawaiian gathering rights. Finally, as the intent of the fence is to

        protect and restore native natural resources, the long-term impact on gathering

        rights may be positive.

        For example, the proposed action will protect and enhance the habitat for

        many native plant species that are essential to the Native Hawaiian culture,

        including palapalai (

        maile (

        (

        As these plants and the forest recover, it may be possible to allow limited

        collecting of certain species (via special use permits) for traditional practices.

        Thus, the proposed action is anticipated to enhance traditional and customary

        practices by protecting and actively managing the native forest and watershed in

        the Pahole Natural Area Reserve.

        Microlepia strigosa), wiliwili (Erythrina sandwicensis),Alyxia oliviformis), ieie (Freycinetia arborea), koa (Acacia koa), ohiaMetrosideros spp.), and papala kepau (Pisonia sp.).

        VI. MITIGATION MEASURES


        Although the proposed action is not expected to have any significant

        impacts on the environment, the following measures are proposed to mitigate

        any potential negative impacts resulting from the project.


        • The proposed fence line was selected based on the need to minimize

          impacts of fence construction on native plant communities; ease of fence

          installation and maintenance; and long-term survival of the fences from

          vegetative encroachment, erosion, and slides. The fence line transects

          predominantly non-native plant communities, and fence alignment has been

          designed to minimize the impacts to native species by following existing

          corridors of disturbance whenever possible.

          Prior to vegetation clearing and fence construction, DOFAW staff will resurvey

          the fence lines to ensure that no rare, threatened or endangered plants or

          animals are within the area cleared for the fence. Potentially sensitive areas and

          any rare, endangered or threatened plant or animal species identified in

          proximity to the project area will be flagged to prevent damage by fence crews.

          If necessary, minor changes in fence alignment will be made to avoid sensitive

          sites by a greater distance.

          Further, in order to avoid impacts to the endangered O‘ahu tree snail,

          (

          biologists to survey the proposed fence line corridor for tree snail populations

          prior to any vegetation clearing. No large ‘ohi‘a trees will be removed, and the

          preferred host tree for the endangered snail, olopua (

          will receive special attention. Any trimming or cutting of trees or shrubs will

          be done only after the vegetation has been carefully inspected for snails. Staff

          knowledgeable about tree snail protocols will do the clearing. Whenever

          possible, the cleared vegetation will be placed on native vegetation so that any

          undetected native tree snails will have an opportunity to reach a replacement

          host plant.

          Vehicular traffic will be restricted to existing roads and jeep trails, and

          existing foot trails will be used during fence construction. All fence

          construction workers will be instructed on specific procedures to prevent the

          spread or introduction of noxious plants in the project area. Known problem

          species, such as

          found along the proposed fence lines will be removed from the project area prior

          to fence construction. Vehicles and equipment will be inspected prior to

          entering the project area.

          Upon initial completion of the fences, any feral pigs remaining in the

          fenced areas would be penned in temporarily until they are removed. This may

          result in intensified damage to native resources by animals that might otherwise

          be passing through the area. DOFAW staff will immediately implement

          intensive control efforts to eliminate any feral pigs remaining in the enclosed

          area. Volunteer hunters from the public will be used as the method-of-choice to

          remove feral pigs from the project area before and after fence construction. No

          further ingress to, or recruitment of, feral pigs in the project area is anticipated.

          Staff will perform periodic monitoring to insure that all pigs are removed and do

          not harm native resources within the fenced areas.

          14

          Most of the proposed fencing will be installed along ridges dominated by

          non-native vegetation, minimizing the likelihood that any archaeological or

          historic sites in the Reserve would be affected. Fencing and removing feral pigs

          from the project area will be the first step toward the protection of any

          archaeological sites that might be discovered in the future. Feral pigs and other

          hoofed mammals are known to disturb archaeological sites elsewhere in Hawai‘i

          by knocking over stone walls, turning over soil, spreading noxious weeds, and

          accelerating erosion and landslides. Vegetation clearing and fence construction

          will cease if any archaeological, historical, or cultural sites are encountered

          during construction, and the State Historic Preservation Division will be

          consulted immediately.

          The proposed action will not restrict travel on the Mokuleia Trail, and the

          integrity of the trail will be kept intact. For the most part, the fences will not

          be visible from the trail and will not impact any view planes. The fence line has

          been routed away from the Mokuleia Trail wherever possible, and will cross the

          trail in only two places. Stiles or gates will be installed to facilitate the safe

          and easy crossing of the fence in these two areas, and gates may be installed in

          other locations for fence maintenance and management purposes. The stiles and

          gates should be more than sufficient for any continued use of the project area.

          To mitigate the loss of public hunting opportunities in the project area,

          efforts will be made by DOFAW staff to provide additional public hunting

          opportunities elsewhere in the Mokuleia Forest Reserve by enhancing access to

          the lower Kaala and West Makaleha areas, where hunting pressure on feral pigs

          is currently low.

          Achatinella mustelina), DOFAW staff will enlist the support of expertNestegis sandwicensis),Triumfetta semitriloba and Clidemia hirta, that are currently

          VII. ALTERNATIVES CONSIDERED


          Five project alternatives were considered and are described here.


          Alternative # 1: Construct a network of habitat management unit fences

          surrounded by a perimeter fence in uppermost portion of the Pahole

          Reserve as proposed (preferred alternative).


          This is the preferred alternative because it is the most efficient way to

          protect native resources and watershed, and control feral pigs. In the long-term,

          it is more cost-effective to subdivide the 235-acre project site into habitat

          management units to facilitate feral pig control and fence maintenance. The

          habitat management fences (Units 1, 2 and 3) would secure high-priority natural

          areas, and the perimeter fence (Unit 4) would provide adjacent protected areas

          for reforestation and future outplanting of endangered species and reforestation.

          Public hunting would be used as the method-of-choice for initially removing

          feral pigs from the fenced areas. Invasive species would be monitored and

          controlled.


          Alternative # 2. Construct small fenced exclosures around existing rare

          and endangered plant species in Pahole Natural Area Reserve.


          15

          This alternative is impractical because most of the rare and endangered

          plants in the Reserve exist on steep slopes, partly as a result of selective

          pressure by feral pigs. Fence construction in these relatively remote areas

          would be difficult and expensive, and would damage the steep sensitive slopes

          targeted for protection. By fencing only existing populations of endangered

          species, this alternative would preclude reforestation of the area and the

          recovery of endangered species.


          Alternative # 3. Construct a perimeter fence around the entire Pahole

          Natural Area Reserve to protect approximately 658 acres.


          This alternative would require approximately 29,000 feet of fencing and

          would be expensive to implement. This alternative would entail fencing

          portions of the lower Reserve (below approximately 1,600 feet) that do not

          warrant intensive management at this time because of a proliferation of invasive

          species and extensive damage caused by feral pigs.


          Alternative # 4. No fences constructed in the Pahole Natural Area

          Reserve; rely on public, staff, and aerial hunting, snaring, and trapping

          to control feral pigs.


          Although public hunting occurs in the Pahole Natural Area Reserve,

          without easy access to the project area and physical barriers, such as fences, to

          restrict the movement of feral pigs, public hunting cannot keep the number of

          pigs low enough to protect the Reserve and recover endangered species. Staff

          hunting and other methods of controlling feral pigs are more effective in

          reducing animal damage than relying on public hunting alone and may be less

          expensive than fencing large areas in the short term. However, as long as the

          Reserve boundaries are open, there will be ingress of feral pigs from adjacent

          lands. Animal control would have to continue indefinitely. Staff and aerial

          hunting, snaring, and trapping would be expensive, unpopular, and perceived by

          the hunting community as an ongoing waste of meat. The best long-term

          solution to the feral pig problem in the Pahole Natural Area Reserve is to fence

          large habitat management units and remove feral pigs as quickly as possible.


          Alternative # 5. No action.


          This alternative is inconsistent with the NARS mandate to protect native

          ecosystems and geological sites in perpetuity, pursuant to Chapter 195, HRS.

          This alternative is contrary to the State’s legal obligation to protect and recover

          threatened and endangered species, as required by Chapter 195D, HRS. The noaction

          alternative effectively accepts the deterioration and eventual loss of

          unique and rare native forest and watershed, and would preclude endangered

          species recovery efforts in the Reserve.

          16


          VIII. DETERMINATION


          It is not expected that this project will have a significant negative impact

          on the surrounding environment, and thus, it is anticipated that the proposed

          action will result in a Finding of No Significant Impact.


          IX. FINDINGS, AND REASONS SUPPORTING THE

          DETERMINATION


          The goal of the proposed action is to benefit native forests, watershed,

          and habitat for native species, including endangered species. Creating

          permanent barriers to exclude feral pigs will enhance reforestation efforts and

          remove a major threat to the continued survival of rare and endangered species.

          Conservation efforts throughout Hawai‘i have consistently shown that removing

          feral pigs and other invasive species is an important first step toward protecting

          and restoring native ecosystems. If animals are removed before the damage is

          widespread and severe, native vegetation is often able to recover naturally and

          the spread of invasive weeds can be stopped. Unless the pervasive disturbance

          of feral pigs is removed, native resources in the Pahole Natural Area Reserve

          will continue to decline.

          Mitigation measures will be implemented to insure that sensitive natural

          resources will not be harmed by the proposed action. Implementing a weedcontrol

          program will increase the likelihood of native vegetation recovery and

          prevent the establishment of new noxious plants. The short-term damage to

          vegetation and soil as a result of building the fences will be more than offset by

          the regeneration that will take place once the feral pigs have been removed.

          The proposed action will protect watershed and habitat for native species that

          are an integral part of the Native Hawaiian culture. Efforts will be taken to

          minimize the effects of the proposed action on public use and enjoyment of the

          project area.

          The anticipated Finding of No Significant Impact is based on the

          evaluation of the project in relation to the following criteria identified in the

          Hawai‘i Administrative Rules § 11-200-12:


          1) Involves an irrevocable commitment to loss or destruction of any natural

          or cultural resource.


          The proposed action will provide long-term protection for native forest,

          watershed, and habitat for native plants and animals, including

          endangered species. Fencing and the removal of feral pigs will enhance

          reforestation and protect watershed values. The project will secure

          outplanting sites for endangered species and aid in their recovery. The

          positive results of the project are expected to more than offset any shortterm

          damage incurred during fence construction.


          2) Curtails the range of beneficial uses of the environment.

          • Amelia,

             

            There is more to this so called Anglo Fence for security reasons, no less.  I doubt if this fence was for the environment.  Dr. George Kanahele writes in his Ku Kanaka text on the Sense of Place and actually makes a difference between the two cultures.  Anglo Geography and fence and the Native Hawaiians and their version of space. 

             

            We needed to call the Anglos on their intent and didn't....

             

            The fence was a well talked about point of contention during botany classes and off classes.  I did do a walk to the end of Kaena with my Botany class 400 level when the Albratros flew in to nest.  So clearly it's an old long time ago plan that leaked into the sustainable plans in Waianae. 

             

            The sustainable planners out here mostly insecure humans and need domestication that are planning the fence line along the Waianae Coast---nuts yeah!

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