Wild Watershed v. Hurlocker

FILED
United States Court of Appeals
Tenth Circuit

PUBLISH June 12, 2020
Christopher M. Wolpert
UNITED STATES COURT OF APPEALS Clerk of Court

TENTH CIRCUIT

WILD WATERSHED; MULTIPLE
CHEMICAL SENSITIVITIES TASK
FORCE; DR. ANN MCCAMPBELL,
M.D.; JAN BOYER,

Plaintiffs-Appellants,
v. No. 19-2106
SANFORD HURLOCKER, District
Ranger, Santa Fe National Forest;
JAMES MELONAS, Supervisor, Santa
Fe National Forest; CAL JOYNER,
Southwest Regional Forester, U.S.
Forest Service; and VICTORIA
CHRISTIANSEN, Chief of the U.S.
Forest Service, an agency of the U.S.
Dept. of Agriculture,

Defendants-Appellees.

APPEAL FROM THE UNITED STATES DISTRICT COURT
FOR THE DISTRICT OF NEW MEXICO
(D.C. NO. 1:18-CV-00486-JAP-SCY)

Thomas J. Woodbury, Forest Defense, P.C., Missoula, Montana, for Appellants.

Eric Grant, Deputy Assistant Attorney General, Environment and National
Resources Division, U.S. Department of Justice (Andrew C. Mergen and Andrew
A. Smith, Attorneys, Environment and National Resources Division, U.S.
Department of Justice, and Stephen A. Vaden, General Counsel and Dawn
Dickman, Attorney, Office of General Counsel, U.S. Department of Agriculture,
with him on the brief), Washington, D.C., for Appellees.
Before TYMKOVICH, Chief Judge, EBEL, and HARTZ, Circuit Judges.

TYMKOVICH, Chief Judge.

The United States Forest Service approved two forest thinning projects in

the Santa Fe National Forest pursuant to statutory authority granted by a 2014

amendment to the Healthy Forests Restoration Act (HFRA). By thinning the

forest and then conducting prescribed burns in the project areas, the Forest

Service aimed to reduce the risk of high-intensity wildfires and tree mortality

related to insects and disease. Certain environmental organizations and

individuals (collectively Wild Watershed) challenged the projects’ approval under

the Administrative Procedure Act (APA). They assert the Forest Service 1 failed

to comply with the National Environmental Policy Act (NEPA) and HFRA. The

district court rejected these claims.

We similarly find the Forest Service complied with its obligations under

NEPA and HFRA when it approved the projects. The Forest Service adequately

considered the projects’ cumulative impacts as well as their potential effects on

sensitive species in the area and the development of old growth forest. We

therefore AFFIRM.

1
Appellees are employees of the Santa Fe National Forest and United
States Forest Service whom Wild Watershed sued in their official capacities only.

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 I. Background

A. Statutory and Regulatory Frameworks

1. National Environmental Policy Act

NEPA requires federal agencies to analyze environmental consequences

before initiating actions that potentially affect the environment. The Act has two

broad aims. First, it “places upon an agency the obligation to consider every

significant aspect of the environmental impact of a proposed action.” Forest

Guardians v. U.S. Fish & Wildlife Serv., 611 F.3d 692, 711 (10th Cir. 2010).

Second, it ensures “that the agency will inform the public that it has indeed

considered environmental concerns in its decisionmaking process.” Id. NEPA

does not mandate any particular substantive result. Instead, it “prescribes the

necessary process” that must accompany agency action. Robertson v. Methow

Valley Citizens Council, 490 U.S. 332, 350 (1989).

One of the hallmarks of NEPA is that agencies must prepare an

environmental impact statement (EIS) when a proposed project will “significantly

affect[] the quality of the human environment.” 42 U.S.C. § 4332(2)(C). An EIS

“involves the most rigorous analysis” that an agency may be required to perform.

See Utah Envtl. Cong. v. Bosworth, 443 F.3d 732, 736 (10th Cir. 2006). NEPA’s

implementing regulations establish a tiered framework for agencies to consider in

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deciding whether an EIS is necessary. 2 The regulations contemplate three

categories into which a proposed project might fall. First, the action may be of

the type that is generally so significant that it “[n]ormally requires an

environmental impact statement.” 40 C.F.R. § 1501.4(a)(1). Next, the action may

be of uncertain significance, in which case the agency will prepare an

environmental assessment (EA)—a more concise document designed to determine

whether a full EIS is necessary. 40 C.F.R. § 1501.4(b)–(c). Finally, the action

may be categorically excluded, meaning it normally does not require either an EA

or an EIS. 40 C.F.R. § 1501.4(a)(2).

Categorical exclusions come in one of two varieties: those established by

regulations and those established by statutes. Implementing regulations define

regulatory categorical exclusions as “a category of actions which do not

individually or cumulatively have a significant effect on the human environment

and which have been found to have no such effect in procedures adopted by a

Federal agency . . . and for which, therefore, neither an environmental assessment

nor an environmental impact statement is required.” 40 C.F.R. § 1508.4.

2
The Council on Environmental Quality is responsible for implementing
NEPA’s requirements by promulgating binding regulations. See 42 U.S.C.
§§ 4342, 4344(3); 40 C.F.R. §§ 1501–08. Agencies such as the Forest Service
comply with the Council’s regulations by adopting supplemental procedures. See,
e.g., 36 C.F.R. § 220.1 et seq.

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 Although regulatory categorical exclusions generally do not require an EA

or an EIS, implementing regulations provide that where “extraordinary

circumstances” exist such that “a normally excluded action may have a significant

environmental effect,” the agency must engage in one of the more thorough forms

of review before proceeding. See 40 C.F.R. § 1508.4; 36 C.F.R. § 220.6(b).

Thus, when relying on a regulatory categorical exclusion, the Forest Service

performs minimal procedures to assess whether such extraordinary circumstances

exist. 36 C.F.R. § 220.6(b). We refer to these procedures as extraordinary

circumstances review. 3

In addition to regulatory categorical exclusions, Congress has intervened to

establish certain statutory categorical exclusions. See, e.g., 16 U.S.C. § 6591b.

Many of these, including the provision at issue in this appeal, are codified in

HFRA.

3
In conducting extraordinary circumstances review, the Forest Service
considers the existence of certain “[r]esource conditions,” in the project area,
including “[i]nventoried roadless area[s],” “potential wilderness area[s],” and
“Forest Service sensitive species.” 36 C.F.R. § 220.6(b)(1). The mere presence
of resource conditions does not preclude the agency relying on a categorical
exclusion. Instead, it is the “degree of the potential effect of a proposed action on
the[] resource conditions that determines whether extraordinary circumstances
exist,” warranting an EA or EIS. Id.

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 2. Healthy Forests Restoration Act

HFRA was originally enacted in 2003 “to reduce wildfire risk to

communities, municipal water supplies, and other at-risk Federal land through a

collaborative process of planning, prioritizing, and implementing hazardous fuel

reduction projects.” 16 U.S.C. § 6501(1). In 2014, Congress amended HFRA,

establishing the statutory categorical exclusion at issue here—the Insect and

Disease exclusion. See 16 U.S.C. § 6591b.

This categorical exclusion authorizes “priority projects” to protect forests

from insect infestations and disease. See 16 U.S.C. § 6591a–b. It contemplates a

two-step process for approving such projects. The Forest Service must first

designate certain “landscape-scale areas” part of an insect and disease treatment

program. 16 U.S.C. § 6591a. Then, the Forest Service may carry out projects

within those areas provided they meet the statutory criteria. Id. § 6591b.

To qualify, a project must (1) meet certain limitations related to the

building of new roads, location, and size, excluding projects of more than 3,000

acres; (2) “maximize[] the retention of old-growth and large trees, as appropriate

for the forest type, to the extent that the trees promote stands that are resilient to

insects and disease;” (3) “consider[] the best available scientific information to

maintain or restore the ecological integrity;” (4) be “developed and implemented

through a collaborative process;” (5) “be consistent with the land and resource

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management plan” for the area; and (6) involve “public notice and scoping.” 16

U.S.C. § 6591b. Where such requirements are met, HFRA provides that the

project “may be . . . considered an action categorically excluded from the

requirements of [NEPA].” Id. § 6591b(a)(1).

B. The Hyde Park and Pacheco Canyon Projects

The Forest Service approved the two projects at issue here—the Hyde Park

Wildland Urban Interface Project and the Pacheco Canyon Forest Resiliency

Project—pursuant to the authority granted by the Insect and Disease exclusion.

App. at 45, 55 (citing 16 U.S.C. § 6591b). The details of the projects are similar.

The Hyde Park project covers 1,840 acres approximately ten miles northeast of

Santa Fe. The Pacheco Canyon project covers 2,042 acres three miles farther

north.

The forest in each project area comprises mostly ponderosa pine with some

Douglas fir, pinon juniper, and mixed conifer stands. Due in part to years of fire

suppression, the trees in the project areas have grown unnaturally dense.

Specifically, young and smaller trees make up a high percentage of the forest.

Because of this density, many of the small trees cannot access sufficient water

and sunlight. This stunts the trees and renders them vulnerable to insect and

disease outbreaks. The combination of dense growth and disease risk has made

the forest susceptible to a particularly intense type of fire—a crown fire—which

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not only burns through the understory as a lower intensity fire might, but also

reaches the larger trees in the overstory.

Due to these risks, the Forest Service proposed thinning the forest and

applying prescribed burns in the project areas to “combat insect and disease,

restore natural fire regimes, improve wildlife habitat, and reduce the risk of

uncharacteristic fire effects.” App. at 53. Not every acre will be thinned or

burned. Thus, after the treatments, a mix of tree densities will remain.

The thinning would target trees less than 16 inches in diameter. 4 Trees

larger than 16 inches in diameter would not be thinned except where disease or

other unusual circumstances warrant it. The felled trees would then be piled.

Subsequent prescribed burns would be utilized to reduce the thinned and piled

material and otherwise treat the understory. These burns roughly approximate the

effects of naturally occurring fires, which historically occurred every five to ten

years, “clearing out the understory while the thick-barked, fire resistant over-story

survived.” App. at 54. Although not designed to affect the larger trees in the

overstory, approximately 10 to 30 percent of the trees larger than 16 inches in

diameter may succumb to the controlled burns. According to the Forest Service,

similar procedures would need to be repeated every 10 to 15 years to continue

replicating naturally occurring wildfire patterns.
4
The 16-inch limit appears to stem from recommendations contained in
scientific literature consulted by the Forest Service.

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 For both projects, considerable acreage is located within various

inventoried roadless areas. But no new roads would be needed to complete either

project, and the Forest Service has not planned any new road construction in

association with these projects.

The projects were not conceived in isolation. Instead, both projects are part

of a larger initiative in the Santa Fe region conducted by the Greater Santa Fe

Fireshed Coalition. 5 As part of this endeavor, the Forest Service works with state,

local, tribal, and environmental organizations to address the risk of wildfire in the

lands around Sante Fe, which cover more than 100,000 acres and are referred to

as the Santa Fe Fireshed. The Coalition’s primary goal is to “identify and

implement high priority on-the-ground projects that make the Fireshed and its

communities more resilient to wildfire, while maintaining and restoring resilient

landscapes.” App. at 33. The Hyde Park and Pacheco Canyon projects represent

the Forest Service’s first efforts to contribute to the Coalition’s goal. 6

5
The Coalition’s members include the Forest Service, the City of Santa Fe,
Santa Fe County, the Tesuque Pueblo, the Nature Conservancy, the Santa Fe
Watershed Association, the Santa Fe Fat Tire Society, and the U.S.G.S. Jemez
Field Station.
6
The Hyde Park project was initially considered in 2005—prior to the
formation of the Coalition—but it was set aside for further analysis. It was then
reconsidered as part of the Forest Service’s contribution towards the Coalition’s
goal.

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 On February 14, 2017, the Forest Service issued a single scoping letter

covering both projects. The letter asked for public comment on the projects and

noted that they are “part of a larger effort sponsored by the Greater Santa Fe

Fireshed Coalition.” App. at 37. After comments were received, the Forest

Service approved the Hyde Park and Pacheco Canyon projects through decision

memos issued on March 21, 2018 and June 1, 2018 respectively.

C. Procedural History

Wild Watershed brought suit challenging the projects, filing the operative

complaint in August 2018. 7 Bringing claims under the APA, NEPA, and HFRA,

Wild Watershed sought to set aside the Forest Service’s approval of the projects.

As relevant here, it argued an EIS was required under NEPA for the larger goal of

treating the Fireshed and the less-extensive review actually conducted by the

Forest Service failed to adequately consider the projects’ effects on inventoried

roadless areas and their cumulative impacts on the environment. Additionally,

Wild Watershed claimed the projects violate HFRA’s requirements that the

projects be consistent with the applicable land and resource management plan,

7
Although Wild Watershed initially sought to enjoin the projects, it
withdrew this request for relief. Accordingly, certain aspects of the projects have
commenced. As of November 2019, 140 acres have been thinned in the Hyde
Park project and 246.5 acres have been thinned in the Pacheco Canyon project.
Additionally, 500 acres have been burned in the Pacheco Canyon project.

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maximize the retention of old growth, and consider the best available scientific

evidence to maintain and restore wildlife habitats. See 16 U.S.C. § 6591b.

The district court disagreed, holding the Forest Service was under no

obligation to follow NEPA requirements because the Insect and Disease

exclusion, by its plain terms, provided an exemption. According to the district

court, all that could be reviewed was the Forest Service’s compliance with the

explicit requirements of the Insect and Disease exclusion, codified in 16 U.S.C.

§ 6591b. These, it held, were satisfied by the Forest Service’s review and

approval of the projects. Accordingly, the court dismissed Wild Watershed’s

challenges.

II. Standard of Review

Because neither NEPA nor HFRA provide for a private right of action, we

review the approval of the Hyde Park and Pacheco Canyon projects as a final

agency action under the APA. See Bosworth, 443 F.3d at 739; Native Ecosystem

Council v. Marten, CV 17-153, 2018 WL 6046472, at *2 (D. Mo. Nov. 19, 2018).

We consider the district court’s opinion de novo. See Am. Wildlands v. Browner,

260 F.3d 1192, 1196 (10th Cir. 2001). But we apply a “deferential” standard of

review to the agency’s decision. Hoyl v. Babbit, 129 F.3d 1377, 1382 (10th Cir.

1997). We will only overturn agency action if it is “arbitrary, capricious, an

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abuse of discretion, or otherwise not in accordance with law.” 5 U.S.C.

§ 706(2)(A).

In considering whether agency action meets this standard, “we must ensure

that the agency decision was based on a consideration of the relevant factors and

examine whether there has been a clear error of judgment.” Colo. Envtl. Coal. v.

Dombeck, 185 F.3d 1162, 1167 (10th Cir. 1999). Agency action will not pass

muster where the agency relies on factors which Congress did not intend it to

consider, fails to consider an important aspect of the problem, offers an

explanation for its decision that runs counter to the evidence before it, or is so

implausible that it could not be ascribed to a difference in view or the product of

agency expertise. Id.; Bosworth, 443 F.3d at 740.

In applying this standard, we accord agency action “a presumption of

validity.” Wyoming v. U.S. Dep’t of Agric., 661 F.3d 1209, 1227 (10th Cir.

2011). Thus, the challenger bears the burden of showing the action is arbitrary

and capricious. Id. Even though courts adopt a deferential posture in reviewing

agency action, we must “engage in a substantive review of the record” to assess

the claims. Olenhouse v. Commodity Credit Corp., 42 F.3d 1560, 1580 (10th Cir.

1994).

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 III. Analysis

Wild Watershed’s challenge proceeds along two paths. First, it asserts the

Forest Service failed to comply with NEPA and its implementing regulations.

Second, it contends the Forest Service violated the statutory requirements of

HFRA. We address each in turn.

A. Compliance with NEPA

The parties dispute whether, and to what extent, NEPA applies to the

approval of the projects. The Forest Service contends it is exempt from NEPA’s

requirements. Wild Watershed disagrees, arguing that when Congress enacted the

Insect and Disease exclusion it did not exempt those types of projects wholesale

from NEPA. It focuses on two NEPA requirements in particular as applicable to

the projects at issue: the obligation to (1) perform extraordinary circumstances

review, and (2) consider the potential cumulative impacts of the projects.

We first consider extraordinary circumstances review and then turn to

cumulative impacts.

1. Extraordinary Circumstances Review

Wild Watershed contends the extraordinary circumstances review

requirement stems from the statutory text of the Insect and Disease exclusion,

which states a project “may be . . . categorically excluded” from the requirements

of NEPA. 16 U.S.C. § 6591b(a). To Wild Watershed, use of the “categorically

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excluded” language signifies Congress’s intent to incorporate the regulatory

definition of “categorical exclusion” and “all that term entails” into the statutory

provision. Aplt. Br. at 13. Regulations define “Categorical exclusion” as,

[A] category of actions which do not individually or cumulatively have
a significant effect on the human environment and which have been
found to have no such effect in procedures adopted by a Federal agency
in implementation of these regulations (§1507.3) and for which,
therefore, neither an environmental assessment nor an environmental
impact statement is required. . . . Any procedures under this section
shall provide for extraordinary circumstances in which a normally
excluded action may have a significant environmental effect.

40 C.F.R. § 1508.4 (emphasis added).

This definition mandates extraordinary circumstances review for regulatory

categorical exclusions, and Wild Watershed would therefore have us read such a

requirement into the statutory language of the Insect and Disease exclusion

because “when Congress employs a term of art, it presumably knows and adopts

the cluster of ideas that were attached to each borrowed word in the body of

learning from which it was taken.” F.A.A. v. Cooper, 566 U.S. 284, 292 (2012).

Wild Watershed also relies on the term “may” in the statute. This, it contends,

shows HFRA merely grants administrative discretion to the Forest Service. In

exercising that discretion and deciding to categorically exclude a project, the

Forest Service must be constrained by those regulations that ordinarily govern its

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decision to categorically exclude projects, including by mandating extraordinary

circumstances review. See 40 C.F.R. § 1508.4; 36 C.F.R. § 220.6.

Moreover, Wild Watershed argues, this is exactly how the Forest Service

itself has interpreted the statute. Pointing to the Forest Service’s handbook and a

Frequently Asked Questions document, Wild Watershed contends the Forest

Service interpreted 16 U.S.C. § 6591b as requiring extraordinary circumstances

review since immediately after passage of the Insect and Disease exclusion. This

agency interpretation, it contends, is entitled to deference.

We disagree. Beginning with the text of the statute, the Insect and Disease

exclusion omits any explicit requirement to perform extraordinary circumstances

review. See 16 U.S.C. § 6591b. Where no explicit statutory requirements exist,

we generally refrain from reading any in. Dean v. United States, 556 U.S. 568,

572 (2009); see also Antonin Scalia & Bryan A. Garner, Reading Law: The

Interpretation of Legal Texts 93 (2012).

But here we are not left to rely on this canon of construction alone. A

comparison to other HFRA statutory categorical exclusions shows Congress

understands what extraordinary circumstances review entails and how to explicitly

require it where it intends to.

In a separate section of HFRA, Congress created a categorical exclusion for

applied silvicultural assessments (Applied Silvicultural Assessments exclusion)

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using similar language to that at issue here. 16 U.S.C. § 6554(d)(1) (providing

that projects “carried out under this section . . . may be categorically excluded

from documentation in an environmental impact statement and environmental

assessment under [NEPA]”). Yet, unlike in the Insect and Disease exclusion,

Congress explicitly mandated that applied silvicultural assessment projects “be

subject to the extraordinary circumstances procedures established by the [Forest

Service].” Id. § 6554(d)(2)(B).

Similarly, in another provision of HFRA, Congress created a statutory

categorical exclusion for wildfire resilience projects. See 16 U.S.C. § 6591d

(establishing the Wildfire Resilience exclusion). Just as it did in the Insect and

Disease exclusion and the Applied Silvicultural Assessments exclusion, Congress

stated that wildfire resilience projects are “categorically excluded from the

requirements of [NEPA].” 16 U.S.C. § 6591d(a)(2). But again, unlike the

provision presently at issue, Congress explicitly added that the Forest Service

“shall apply the extraordinary circumstances procedures under [36 C.F.R. § 220.6]

when using” the Wildfire Resilience exclusion. Id. § 6591d(c)(4).

The import of these provisions is clear: Congress does not use the

“categorically excluded” language as a term of art necessarily incorporating a

requirement to perform extraordinary circumstances review. Russello v. United

States, 464 U.S. 16, 23 (1983) (holding that where “Congress includes particular

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language in one section of a statute but omits it in another section of the same

Act,” courts presume that “Congress acts intentionally and purposely in the

disparate inclusion or exclusion”); see also Scalia & Garner, supra, at 170 (noting

that under the presumption of consistent usage canon, a word or phrase is

presumed to bear the same meaning throughout a statute, and should be

interpreted consistently with the way the term is used in other parts of the

statute). Where Congress intends extraordinary circumstances review to be

required before an agency may rely on a statutory categorical exclusion, it says so

explicitly. See, e.g., 16 U.S.C. § 6591d(c)(4).

Accordingly, the absence of an explicit extraordinary circumstances review

requirement in the Insect and Disease exclusion leads us to conclude that no such

requirement exists under the statute. To our knowledge, every court that has

squarely addressed this question has reached the same conclusion. 8 See, e.g.,

Marten, 2018 WL 6046472, at *5; Greater Hells Canyon Council v. Stein, No.

2:17-cv-00843, 2018 WL 3966289, at *8 (D. Or. June 11, 2018) (Sullivan,

8
We do not suggest courts have treated this question uniformly. The
Ninth Circuit, for example, recently assessed the adequacy of the Forest Service’s
extraordinary circumstances review without deciding the threshold question of
whether HFRA mandated such review. Ctr. for Biological Diversity v. Ilano, 928
F.3d 774, 781 n.3 (9th Cir. 2019) (noting that it “need not address” whether
HFRA mandated extraordinary circumstances review); Greater Hells Canyon
Council v. Stein, No. 18-35742, 2020 WL 110523, at 1 (9th Cir. Jan. 9, 2020)
(“Assuming, without deciding, that the [Insect and Disease exclusion] requires
extraordinary circumstances review.”).

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Magistrate J., proposing findings of fact and recommendations), adopted by, 2018

WL 3964801, at *1 (D. Or. Aug. 17, 2018).

Wild Watershed’s reliance on the regulatory definition of categorical

exclusion, see 40 C.F.R. § 1508.4, fails to disturb this result. That definition, by

its plain terms, applies only to regulatory categorical exclusions. 40 C.F.R.

§ 1508.4 (defining “Categorical exclusion” as those actions “which have been

found to have no such effect in procedures adopted by a federal agency in

implementation of these regulations” (emphasis added)). It does not reach

statutory categorical exclusions such as the Insect and Disease exclusion at issue

here. See Stein, 2018 WL 3966289, at *8.

Nor do the Forest Service’s guidance documents suggesting such review

might be appropriate convince us of Wild Watershed’s position. 9 Although the

FAQ document and Forest Service handbook present some evidence in favor of
9
We consider these materials only for the persuasive value they may hold.
See Skidmore v. Swift & Co., 323 U.S. 134, 140 (1944) (noting that agency
interpretations—no matter what form they take—may be considered for
persuasiveness based on “the thoroughness evident in [the agency’s]
consideration, the validity of its reasoning, its consistency with earlier and later
pronouncements, and all those factors which give it power to persuade, if lacking
power to control”). Although in its opening brief Wild Watershed sought
Chevron deference, such deference is inappropriate considering neither the FAQ
document nor the Forest Service handbook carries the force of law. See United
States v. Mead Corp., 533 U.S. 218, 234 (2001) (noting that interpretations
contained in policy statements, agency manuals, and enforcement guidelines are
“beyond the Chevron pale”). In its reply brief, Wild Watershed appears to
concede the point by noting that “the handbook, like the FAQ guidance itself, are
not enforceable – they are each persuasive for the courts only.” Reply at 5.

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Wild Watershed’s interpretation, we find this insufficient to overcome our

conclusion based on the text and structure of HFRA that no extraordinary

circumstances review was required prior to approving the projects.

The Forest Service’s FAQ document, first issued on May 1, 2014 in the

wake of the 2014 Farm Bill’s passage, weighs in Wild Watershed’s favor. App. at

21 (stating a Forest Service official must conduct extraordinary circumstances

review for projects approved under 16 U.S.C. § 6591b). But immediately after

issuing this FAQ document, the Forest Service updated its handbook. See Forest

Service Handbook, Ch. 30, § 32.3 (Amendment No. 1909.15-2014-1, effective

May 28, 2014).

The updated handbook is more equivocal. It could be read either as

supporting Wild Watershed’s interpretation or the Forest Service’s position. 10 But

we need not definitively resolve the question because we find the Forest Service’s

guidance documents and past practice insufficiently clear, consistent, or thorough

10
To Wild Watershed’s point, the handbook nowhere clearly states the
position the Forest Service now advances—that statutory categorical exclusions
are exempt from extraordinary circumstances review unless the statute explicitly
states otherwise. See generally Forest Service Handbook, Ch. 30 (Amendment
No. 1909.15-2014-1, effective May 28, 2014). The Forest Service would have us
infer this point from the fact that the handbook states extraordinary circumstances
review is required for one statutory categorical exclusion— the Applied
Silvicultural Assessments exclusion—but omits any similar requirement from the
section discussing the Insect and Disease exclusion. Id. This is one potential
reading of the handbook, but far from the only plausible one.

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to be persuasive in interpreting the applicable statutory and regulatory framework.

See Skidmore, 323 U.S. at 140.

2. Consideration of Cumulative Impacts

Because we hold 16 U.S.C. § 6591b does not mandate extraordinary

circumstances review, we need not address Wild Watershed’s arguments with

respect to the alleged insufficiencies of that review. See Wyoming, 661 F.3d at

1239 (noting the longstanding rule that as long as agencies “compl[y] with the

statutory and regulatory minima, absent ‘extremely compelling circumstances,’ a

reviewing court generally may not overturn an agency decision for failure to

provide additional procedure”). Under this logic, the district court declined to

consider Wild Watershed’s claims with respect to cumulative impacts and impacts

to inventoried roadless areas. 11

We agree with respect to inventoried roadless areas, but find more is

required before dismissing Wild Watershed’s claims with respect to cumulative

impacts. Wild Watershed argues consideration of cumulative impacts is required

not only as a subcomponent of extraordinary circumstances review, but also

independently by HFRA’s “scoping” requirement and certain Forest Service

regulations. See Aplt. Br. at 16. We have rejected the former contention, but not

11
The district court is not alone in this approach. See Marten, 2018 WL
6046472, at *5 (similarly dismissing cumulative impacts arguments based on its
conclusion that HFRA did not mandate extraordinary circumstances review).

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yet addressed the latter—whether HFRA’s “scoping” requirement and certain

Forest Service regulations independently require consideration of potential

cumulative impacts.

While the parties argue this point in the briefing, we need not definitively

resolve it. Assuming, without deciding, that the Forest Service was required

under 16 U.S.C. § 6591b to consider the potential cumulative impacts of the

projects, we nonetheless find the Forest Service’s conduct in this regard sufficient

under the APA—that is, neither arbitrary nor capricious. Regulations define

“cumulative impact” as,

[T]he impact on the environment which results from the incremental
impact of the action when added to other past, present, and reasonably
foreseeable future actions regardless of what agency (Federal or non-
Federal) or person undertakes such other actions. Cumulative impacts
can result from individually minor but collectively significant actions
taking place over a period of time.

40 C.F.R. § 1508.7.

But the Forest Service need not consider any and all past, present, and

foreseeable actions. It must only consider those actions that are “relevant and

useful” in the agency’s judgment, “because they have a significant cause-and-

effect relationship with the direct and indirect effects of the proposal for agency

action and its alternatives.” 36 C.F.R. § 220.4.

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 In approving the projects, the Forest Service considered certain potential

cumulative impacts in detail. For example, it considered the potential cumulative

effects of the expected subsequent treatments in the project areas on sensitive

species. It also considered the potential cumulative effects of thinning in multiple

areas within the Fireshed on management indicator species and threatened and

endangered species. In each instance, it found no adverse cumulative effects.

Wild Watershed slides by these portions of the record and instead asserts

that the Forest Service was required to consider a separate type of cumulative

impact, namely “the dramatic effects of extensive thinning and . . . burning” on

21,896 acres of Forest Service land within the Fireshed. Aplt. Br. at 21.

Specifically, Wild Watershed seeks an assessment of the effects of thinning and

burning on roadless areas and old growth habitat. To support its contention that

such extensive thinning and burning is, in fact, occurring or reasonably

foreseeable, Wild Watershed points to the Coalition’s meeting minutes and a map

depicting certain “ongoing or planned” projects within the Fireshed. Aplt. Br. at

20–21 (citing App. at 30).

But the Forest Service cannot have acted arbitrarily or capriciously in

failing to assess the cumulative effects of something that the record does not

show to be either occurring or reasonably foreseeable. See Wyoming, 661 F.3d at

1227 (noting agency action benefits from the presumption of validity and the

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challenger bears the burden of showing it is arbitrary or capricious). The map

Wild Watershed relies on depicts certain projects in the Fireshed and suggests that

these are planned or ongoing. These projects do cover 21,896 acres, but,

critically, the map does not convey the substance of the projects. That is, the map

does not show these are thinning and burning projects.

Nor do the meeting minutes Wild Watershed points to provide clarity.

While they discuss additional ongoing or planned projects in the Fireshed, these

projects do not align with those depicted on the map. Nor do the minutes

elaborate on what the projects described therein involve. Only one project

discussed in the meeting minutes (but not depicted on the map) is explained as

involving “thinning and piling” and “prescribed fire.” App. at 27. No specific

acreage is provided for this project. Accordingly, Wild Watershed fails to show

the alleged 21,896 acres worth of projects it cites to necessarily warranted

consideration for having “a significant cause-and-effect relationship with the

direct and indirect effects of the [Hyde Park and Pacheco Canyon projects].” 36

C.F.R. § 220.4; see also Wyoming, 661 F.3d at 1227.

Forest Service statements further undercut Wild Watershed’s argument.

The forest official responsible for approving the projects declared that, at the time

of the Hyde Park and Pacheco Canyon projects were approved, the Forest Service

lacked “a defined proposal for work across the remaining National Forest System

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lands within the Fireshed.” Supp. App. at 54 (“The number of acres to be

treated, the methods for treating those areas, and the funding to accomplish

implementation ha[d] yet to be determined.”). Thus, the potential cumulative

impacts of the Hyde Park and Pacheco Canyon projects were not considered in

conjunction with these other “speculative” components of the larger Coalition

initiative. Id. Although the map and meeting minutes raise some questions with

respect to the number of ongoing or planned projects within the Fireshed and their

stage of development, we find these documents insufficient to show the Forest

Service acted arbitrarily or capriciously. Arizona Public Serv. Co. v. E.P.A., 562

F.3d 1116, 1123 (10th Cir. 2009) (“We will not set aside agency action on

account of a less-than-ideal explanation as long as the agency’s decisionmaking

process may reasonably be discerned.”). 12

12
Wild Watershed also contends the Forest Service improperly segmented
the projects. Aplt. Br. at 19 (arguing the projects “are interdependent parts of a
larger action and depend on the larger action for their justification”). Again
assuming without deciding that NEPA’s prohibition on such segmentation applies
to projects such as these, we find the Forest Service’s conduct sufficient under
APA review. While it is true other projects were anticipated in the Santa Fe
Fireshed, the record does not show the projects were so interconnected that they
required collective evaluation under NEPA. The projects are several miles apart
and occur in separate watersheds that drain to different locations. Supp. App. at
55. Implementation of the projects will proceed independently, with significant
differences in funding and participation. Id. Moreover, as the Forest Service
official responsible for overseeing the projects declared, the projects would
proceed even if the larger Coalition initiative did not exist. Id. at 54.

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 Accordingly, Wild Watershed fails to show the projects may be set aside

due to any NEPA violation.

B. Compliance with HFRA

Wild Watershed next claims the projects violate HFRA by failing to

adequately (1) develop old growth, and (2) protect certain species of wildlife,

namely the northern goshawk and the Abert’s squirrel.

1. Old Growth

Turning first to Wild Watershed’s claims with respect to old growth, HFRA

mandates that the Forest Service “maximize[] the retention of old-growth and

large trees, as appropriate for the forest type, to the extent that the trees promote

stands that are resilient to insects and disease.” 16 U.S.C. § 6591b(b)(1)(A). The

statute further requires the projects “be consistent with the [applicable] land and

resource management plan.” Id. § 6591b(e). Here, that is the Santa Fe National

Forest Plan (Forest Plan), which provides numerous criteria governing treatments

of areas containing or being developed as old growth forest.

Under the Forest Plan, the Forest Service must, “strive to create or sustain

as much old growth compositional, structural, and functional flow as possible

over time at multiple-area scales” and “seek to develop or retain old growth

function on at least 20 percent of the forested area by forest type in any

landscape.” App. at 246. Although “[t]hinning is permitted in stands being

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managed for old growth when the result will enhance attainment of the old growth

characteristics. No treatments should occur in a stand managed for old growth

once the stand has achieved minimum structural characteristics of old growth.”

Id.

We begin with the threshold issue—whether the project areas include any

old growth forests. The Forest Service classifies the forest in the project area as

“young” based on the use of the Vegetative Structural Stage (VSS) methodology,

which uses tree diameter most frequently represented to determine the age of a

stand of trees. Where, as here, the forest contains a high prevalence of young

trees, this method results in a classification of “young” despite the existence of

older trees. Wild Watershed takes issue with this, arguing that because there are

some ponderosa pines over 180 years-old—the threshold age to be considered

“old growth” under the Forest Plan—in the area, it is nonsensical to classify the

forest as young. 13

We do not agree that such a classification is facially arbitrary or capricious.

Under Wild Watershed’s logic, the Forest Service would be precluded from

classifying a forest as young due to the presence of a single older tree. Moreover,
13
Although it critiques the methodology used to classify the forest as
young, Wild Watershed does not contest the fact that there are too few old trees in
the project area to qualify as old growth under the Forest Plan. App. at 247
(stating that for ponderosa pine stands—the most common in the project
areas—there must be at least 20 trees per acre that are 18 inches or greater in
diameter at breast height and 180 years old to qualify as old growth).

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we cannot second guess the Forest Service’s classification in this instance.

Where challenged agency decisions “involve technical or scientific matters within

the agency’s area of expertise,” our deference to the agency is “especially strong.”

Biodiversity Conservation All. v. Jiron, 762 F.3d 1036, 1060 (10th Cir. 2014).

Wild Watershed argues that the VSS methodology is “most frequently”

used to assess stands that, unlike those at issue, are “even aged stands.” Aplt. Br.

at 36. Such a methodology, it argues, has “limited applicability for fuel reduction

treatments.” Id. But such contentions are insufficient to override the requisite

deference we give to an agency’s technical choices, and they fail to show the

Forest Service’s reliance on the VSS methodology renders its decision arbitrary or

capricious.

The fact that a particular methodology has limited applicability or might be

most frequently used in another context casts some doubt on whether it is the best

approach, but falls short of showing the agency engaged in “a clear error of

judgment,” “fail[ed] to consider an important aspect of the problem,” or “offer[s]

an explanation . . . that . . . is so implausible that it could not be ascribed to a

difference in view or the product of agency expertise.” Dombeck, 185 F.3d at

1167; San Juan Citizens All. v. Stiles, 654 F.3d 1038, 1045, 1057 (10th Cir. 2011)

(“[W]hen specialists express conflicting views, an agency must have discretion to

rely on the reasonable opinion[] of its own qualified experts, even if, as an

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original matter, a court might find contrary views more persuasive.” (quoting

Marsh v. Or. Nat. Res. Council, 490 U.S. 360, 378 (1989))).

Perhaps recognizing this, Wild Watershed argues that it does not matter

whether the forest is classified as old growth, because “even in areas where there

is no existing old growth, the [Forest] Service must still manage the best available

developing old growth habitat.” Aplt. Br. at 24. It argues the Forest Service has

failed to do this because the treatments will harm old growth development. We

reject this argument because Wild Watershed cannot show that the projects at

issue are inconsistent with any of HFRA’s or the Forest Plan’s directives.

Taking HFRA first, Wild Watershed glosses over an important limitation in

the statutory language. The Forest Service is only required to “maximize the

retention of . . . large trees . . . to the extent that the trees promote stands that are

resilient to insects and disease.” 16 U.S.C. § 6591b. Here, the projects are

specifically designed “so that the risk of insect and disease outbreak[s] [will be]

reduced.” App. at 43. Without the treatments, the “high density of trees in the

project area[s] . . . and the prevalence of small diameter trees” will continue to

“contribute to conditions that elevate the risk for insect and disease outbreaks.”

App. at 142. Indeed, “[t]he risk of tree mortality from insects/diseases,

particularly bark beetles, is expected to increase in the project area[s]” unless

something is done. Id. In short, it is clear from the record that, left untreated, the

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forests in the project areas do not “promote stands that are resilient to insects and

disease.” 16 U.S.C. § 6591b. Accordingly, the Forest Service’s decision to treat

the forest in the project areas is consistent with HFRA’s directives, even to the

extent it has some impact on large trees.

Turning to the requirements of the Forest Plan, the record demonstrates the

Forest Service has adequately considered old growth and structured the projects to

retain and develop such growth consistently with the Forest Plan’s directives.

Both projects involve treatments that “favor retention of the largest, healthiest

fire tolerant species.” App. at 144. For both, “[o]ld growth forest [will] be

maintained or promoted.” Id. at 121. No trees over 16 inches in diameter will be

thinned, unless certain unusual circumstances such as poor health warrant it.

Although some of the large trees may succumb to the prescribed burns, these are

designed to be low-intensity fires, which the large ponderosa pines—the oldest

trees in the areas—are well equipped to endure. Id. at 100 (“Larger pine trees

would likely not be killed during burning due to fire-resistant bark.”).

Moreover, the treatments will be beneficial in that they will “encourage the

remaining trees to grow into larger diameters.” Id. at 145. Accordingly, the

projects are consistent with the Forest Plan’s mandate to “sustain as much old

growth compositional, structural, and functional flow as possible over time at

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multiple-area scales” and enhance the attainment of old growth characteristics. 14

Id. at 246.

The projects are similarly consistent with the Forest Plan’s directive to

“seek to develop or retain old growth function on at least 20 percent of the

forested area by forest type in any landscape.” Id. The record reveals that a

“landscape” varies in size, but generally refers to “contiguous areas of several to

1,000 stands.” App. at 260. Meanwhile a stand covers anywhere from 4 to 100

acres. Id. Accordingly, a landscape may refer to an area as large as 100,000

acres. This is consistent with the Forest Service’s use of the term to refer to the

entire Fireshed. The project areas at issue here, by contrast, are much smaller,

covering collectively only 3,882 acres. Accordingly, the Forest Service’s failure

14
Wild Watershed cites the “decadence” in these woods, suggesting it is
the natural result of the areas remaining untouched by human interference for
centuries. But these overly dense stands of unhealthy trees are not natural. Such
conditions stem from more than a century of human intervention in the form of
fire suppression. And now the unnatural conditions threaten the very older trees
that Wild Watershed seeks to protect. App. at 100 (noting that under current
conditions “large tree loss would continue over long term due to competition,
insects and disease”). Wild Watershed argues that the treatments will forever
prevent the areas from attaining old growth characteristics, but it has the logic
backward. The projects seek only to realign the forest composition and fire cycle
with the historical norm. Far from preventing ponderosa pines (the only stands
potentially close to attaining old growth characteristics in the project areas) from
developing, the treatments aim to do just that. It is only under the current
conditions—those favored by Wild Watershed—that the record shows no young
ponderosa pines will be able to propagate and grow. App. at 95 (noting that
“ponderosa pine regeneration is sparse to non-existent” because “[p]onderosa pine
is shade intolerant and unable to regenerate under a dense canopy”).

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to set aside 20 percent of each project to be managed for old growth does not run

afoul of the Forest Plan’s mandate, as it is obvious that the Forest Service can

still comply with this requirement at the landscape level.

Accordingly, Wild Watershed fails to show the Forest Service acted

arbitrarily or capriciously with respect to any old growth requirements.

2. Wildlife

Finally, Wild Watershed argues that the projects run afoul of HFRA and the

Forest Plan for failing to adequately consider the projects’ potential adverse

impact on the northern goshawk and Abert’s squirrel. Under HFRA, the Forest

Service must consider “the best available scientific information to maintain or

restore the ecological integrity, including maintaining or restoring structure,

function, composition, and connectivity” of habitats. 16 U.S.C. § 6591b(b)(1).

With respect to the northern goshawk, Wild Watershed argues the Forest Service

failed to consider that the northern goshawk requires minimum canopy coverage

of 40 percent. In certain places, the projects will thin the canopy coverage down

to as low as 35 percent. According to Wild Watershed, this renders the Forest

Service’s conduct arbitrary and capricious.

We disagree. Despite the fact that “[i]t is unlikely that goshawks occur in

the project area,” the Forest Service engaged in extensive review of the projects’

potential effects on the areas’ suitability as habitat for the species. This included

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discussion of the effect of reducing, in the short term, the canopy coverage. The

Forest Service concedes that high canopy coverage is, indeed, better for goshawk

nesting. But it states that the projects will “maintain at least 40% canopy cover

where it exists pre-project in suitable goshawk habitat.” App. at 149. The

thinning will also allow medium size trees to “become more healthy and thus

increase their crown size,” resulting in increased canopy coverage and an

improved habitat in the long term. Id.

Further, canopy coverage is not the only important aspect to consider, as

the thinning will “benefit prey species” of the goshawks, whose habitats “are

declining in the area largely due to fire suppression.” Id. Overall, the Forest

Service notes that in the short term there will be “negative impact[s]” on the

suitability of the area for goshawk habitats. Id. at 151. But over the long term,

the decrease of the “young, overstocked and dense stands of suppressed trees”

will create habitat improvements for goshawks and their prey. Id. at 103, 151.

Given this detailed analysis, we can hardly call the Forest Service’s trade-off of

some negative short-term consequences for long-term benefits arbitrary or

capricious. Instead, such reasoning appears thoughtful and well justified,

especially where, as here, it is unlikely any goshawks are currently nesting in the

project areas.

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 Wild Watershed also takes issue with the Forest Service’s lack of

consideration of the Abert’s squirrel, but its argument is no stronger here. To the

extent Wild Watershed is concerned about the decrease in canopy coverage’s

effect on the Abert’s squirrel, this was adequately considered and addressed by

the Forest Service, as discussed above. To the extent Wild Watershed is instead

concerned about a lack of consideration of the squirrel itself, the Forest Service

considered the projects’ effects on “small mammals” and many management

indicator species whose habitat needs allow them to serve as surrogates for the

Abert’s squirrel. See App. at 100, 105–10, 153–58. Accordingly, the Forest

Service did not act arbitrarily or capriciously in approving the projects due to

insufficient consideration of any squirrels.

IV. Conclusion

For the reasons stated herein, we hold the Forest Service did not violate any

applicable requirement of the National Environmental Policy Act or the Healthy

Forests Restoration Act in approving the Hyde Park and Pacheco Canyon projects.

Accordingly, the Forest Service complied with the Administrative Procedure Act,

and we AFFIRM the district court.

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