OPINION
¶ 1 Coconino County appeals from the trial court’s dismissal of its complaint against Anteo, Inc. and its owners, Richard and Chris Twidwell (collectively, “Anteo”). The dismissal was premised on the doctrine of primary jurisdiction. Anteo cross-appeals, requesting that we vacate the trial court’s dismissal of its counterclaim for declaratory relief. For the reasons set forth below, we reverse both dismissals.
FACTS AND PROCEDURAL HISTORY
¶ 2 The Twidwells are the sole shareholders, directors, and officers of Anteo Inc., an Arizona corporation. They also own twenty acres of land in Coconino County, Arizona, five acres of which they lease to Eden Organics, a dba of Anteo, for the composting of domestic septage and grease. Between January 1998 and September 2001, Eden Organics ran a commercial fertilizer operation for the production and sale of composted materi *85 als to the public. Its operation involved the open air composting of domestic septage and restaurant grease, and was conducted pursuant to a conditional use permit issued by the Coconino County Planning and Zoning Commission (the “Commission”). The Arizona Department of Environmental Quality (“ADEQ”) inspected the site several times, partly in response to complaints filed by Coconino County, but did not find any violations. In September 2001, however, the Commission determined that Anteo was not in compliance with the conditional use permit and ordered it to apply for a modified use permit. 1
¶3 With its composting business under scrutiny by Coconino County, Anteo attempted to qualify for newly-amended statutory protections available to agricultural composting operations. See A.R.S. §§ 11-830(A)(3) (2001) (restricting, under certain conditions, local regulation of “use or occupation of land or improvements for agricultural composting”), 3-112(B) (2002) (presumption that lawful agricultural operations do not adversely affect public health and safety). Accordingly, Anteo notified the Coconino County Board of Supervisors and the Summit Fire Department that, as of September 1, 2001, it had changed its operations from commercial composting to agricultural composting.
¶ 4 On April 5, 2002, Coconino County filed a complaint and motion for temporary restraining order against Anteo, alleging that Anteo’s “open dumping and use of septage and restaurant grease” violated various ADEQ regulations and therefore constituted a “per se public health nuisance” and a “public health, safety and welfare hazard.” On August 27, 2002, Anteo filed an answer and a counterclaim for declaratory judgment, seeking a judicial declaration that, inter alia, its activities qualified as “agricultural composting,” and that A.R.S. § 11-830(A)(3) precluded Coconino County from “regulating the use or occupation of land” for that purpose.
¶5 The parties subsequently filed cross-motions for summary judgment. Antco’s motion for partial summary judgment requested among other things that, pursuant to the doctrine of primary jurisdiction, the trial court “abstain from taking any action ... and dismiss the complaint until [Coconino] County has gone through [ADEQ’s] administrative process.” Relying on the doctrine of primary jurisdiction, the trial court granted Antco’s motion for partial summary judgment by dismissing Coconino County’s complaint without prejudice in deference to ADEQ “for an initial decision” on the matter. The trial court, however, did not establish a timeframe for ADEQ action or identify the precise issues that it expected ADEQ to resolve. In light of its order dismissing the complaint, the trial court declined to rule on any other issue, including Anteo’s counterclaim and dismissed the entire case without prejudice. Coconino County filed a timely appeal, and Anteo filed a timely cross-appeal. See ARCAP 9(a). We have jurisdiction pursuant to A.R.S. § 12-210KB) (2003).
STANDARD OF REVIEW
¶ 6 We will not overturn a trial court’s order dismissing a complaint absent an abuse of discretion.
Keenen v. Biles,
DISCUSSION
¶ 7 Our analysis will include the three legal doctrines that, given the cases cited by the *86 parties, might have influenced the trial court’s decision: exhaustion of remedies, primary jurisdiction, and preemption. Because these doctrines are frequently confused and sometimes overlap in their application, we discuss each of them separately.
Exhaustion of Remedies 2
¶ 8 When a statute grants an administrative agency original jurisdiction over a dispute, the exhaustion of remedies doctrine compels the parties to avail themselves of all available administrative processes before seeking the aid of a court.
See Campbell,
¶ 9 The purpose of the exhaustion of remedies doctrine is “to allow an administrative agency to perform functions within its special competence — to make a factual record, to apply its expertise, and to correct its own errors so as to moot judicial controversies.”
Id.
at 511, ¶ 9,
¶ 10 In
Southwest Soil Remediation, Inc. v. City of Tucson,
for example, we concluded that the exhaustion of remedies doctrine precluded a soil recycling company from filing suit to overturn the decision of a city zoning administrator because it had not first appealed to the city’s board of adjustment as required by statute.
¶ 11 In the instant case, the exhaustion of remedies doctrine is clearly inapplicable. No administrative action was pending with respect to Anteo at the time the trial court dismissed Coconino County’s complaint. Indeed, the record reflects that Coconino County filed its complaint at least in part because ADEQ had failed to act as Coconino County had requested. Although the trial court’s dismissal of its complaint did not prevent Coconino County from filing further complaints with ADEQ, see A.R.S. § 41-1010 (2004), such complaints could not compel action by ADEQ and would likely have been futile in light of the results of ADEQ’s previous investigations, which found no existing violations of its environmental regulations. See A.R.S. §§ 49-141(A) (2005) (ADEQ director has discretion to act where there is “reasonable cause to believe from information furnished to the director or from the director’s own investigation that a person is maintaining an environmental nuisance”),-287.01(A) (2005) (director may conduct preliminary investigation),-781(A) (2005) (if director determines that a person is creating *87 an imminent and substantial endangerment to the public health or the environment, he may issue an order requiring immediate compliance).
¶ 12 Moreover, in the 2001 delegation agreement between ADEQ and Coconino County, ADEQ specifically acknowledged Coconino County’s statutory right to initiate related enforcement actions independently. 3 Consequently, the exhaustion of remedies doctrine could not have prevented Coconino County from pursuing its complaint against Anteo.
Primary Jurisdiction
¶ 18 Anteo did not directly argue below that Coconino County was without statutory power to act or that the exhaustion of remedies doctrine prevented Coconino County from pursuing its action with the court. Rather, Anteo argued that Coconino County’s authority to act had been preempted by the state in light of various state statutes concerning composting. The trial court did not rule upon the preemption argument. Anteo also argued, and the trial court agreed, that the doctrine of primary jurisdiction required that the court defer the matter to ADEQ. We, however, disagree with that conclusion.
¶ 14 In contrast to the exhaustion of remedies doctrine, the doctrine of primary jurisdiction is a deferential doctrine that applies when a court and an administrative agency have concurrent jurisdiction over an issue.
See, e.g., Campbell,
¶ 15 When appropriately applied, the doctrine of primary jurisdiction ensures the “[ujniformity and consistency in the regulation of business entrusted to a particular agency” by the legislature, provides for the rational exercise of “the limited functions of review by the judiciary,” and promotes the “orderly and sensible coordination of the work of agencies and of courts.”
Id.
at 430,
¶ 16 Because the doctrine of primary jurisdiction derives from the constitutional mandate of the separation of powers, it applies when an initial decision by the judiciary could interfere with the effective operation of an agency established by a co-equal branch of government, such as when an administrative review of the matter has already begun.
See, e.g., Original Apartment Movers, Inc.,
¶ 17
Original Apartment Movers, Inc.,
for example, involved a taxpayer who filed a lawsuit challenging his tax liability while the Arizona Department of Revenue, the state agency entrusted by statute with determining tax liability, was conducting a related audit.
¶ 18 However, Anteo has failed to cite, and we have not found, any case in which a local government has been prevented from exercising its public health enforcement powers by the operation of the doctrine of primary jurisdiction.
See
A.R.S. § 36-183.02(A) (2003) (“Each county shall investigate all nuisances, sources of filth and causes of sickness and make regulations necessary for the public health and safety of the inhabitants.”). We decline to apply the doctrine to such effect here, especially since the key precedent upon which Anteo relies,
Far East Conference v. United States,
¶ 19 In
Far East Conference,
the U.S. Department of Justice sought to enjoin alleged violations of the Sherman Anti-Trust Act.
Id.
at 573,
¶20 The United States Supreme Court reversed, citing its previous decisions that detailed the purpose, scope, and limits of the Shipping Act.
Id.
at 573-74,
in cases raising issues of fact not within the conventional experience of judges or cases requiring the exercise of administra *89 tive discretion, agencies created by Congress for regulating the subject matter should not be passed over. This is so even though the facts after they have been appraised by specialized competence serve as a premise for legal consequences to be judicially defined.
Id.
(emphasis added). The Court further explained that the federal government, like a private party, was subject to the doctrine of primary jurisdiction under the circumstances of the case because “[t]he same Anti-Trust Laws and the same Shipping Act apply to the same dual-rate system. To the same extent they define the appropriate orbits of action as between
court
and
Maritime Board.” Id.
at 576,
¶ 21 However, the United States Supreme Court and other courts have explained that the doctrine of primary jurisdiction does not apply if the administrative agency has already acted or otherwise been given an opportunity to determine matters within its special expertise or explicit jurisdiction prior to judicial review.
See, e.g., W. Pac. R.R. Co.,
¶ 22 Here, ADEQ was given ample opportunity to initially determine the underlying facts and circumstances of this case, but apparently exercised its discretion not to act against Anteo. ADEQ inspected the site twice in 1999, but did not find a violation. In June 2001, Coconino County filed a complaint with ADEQ alleging that Anteo’s operations constituted an environmental nuisance. ADEQ again inspected the site and again found no violation. Subsequently, in a letter to Anteo dated May 20, 2004, ADEQ’s water quality division director detailed the “interface and applicability” of various ADEQ regulations governing the land application and disposal of biosolids and human excreta. The division director also explained a local county health department’s authority over such regulations and noted that “[o]f course, a local ordinance may govern the activity and local authorities should be consulted about the existence of any applicable local ordinance.”
¶ 23 Given Coconino County’s putative authority to act in its own right, Coconino County’s initial resort to ADEQ, ADEQ’s decision not to act, and ADEQ’s letter to Anteo, the reasons behind the doctrine of primary jurisdiction — the promotion of uniformity between courts and agencies and the input of an agency’s special expertise — would not be served by its application here. A trial court may not use the doctrine of primary jurisdiction to prevent a local government from taking actions that are arguably within its power, and certainly not after the appropriate administrative agency has had an opportunity to determine the matter or other *90 wise provide the court with the benefit of its expertise. 4 Rather, as discussed next, the germane issue here is preemption.
Preemption
¶24 Unlike the doctrine of primary jurisdiction, which encourages the coordination between courts and administrative agencies, the doctrine of preemption is derived from the supremacy clause, which establishes the hierarchy of different levels of government.
See
U.S. Const. art. VI, cl. 2;
Capital Cities Cable, Inc. v. Crisp,
¶25 To determine whether a local government has been preempted, a court must find “a clear manifestation of legislative intent to preclude local control” and an actual conflict between local regulation and governing state law.
Wonders,
¶26 Here, Coconino County’s complaint was based on its putative statutory powers that, it claimed, were valid notwithstanding various state statutes and regulations concerning “septage sludge use and disposal practices.”
See, e.g.,
A.R.S. §§ 49-262(B),-704 (2005) (“This chapter does not prevent any county, city or town from adopting and enforcing any ordinance, resolution or other policy relating to solid waste regulation or solid waste services if such policy is otherwise authorized by statute or charter and is not in conflict with this chapter or any rule or regulation adopted pursuant to this chapter.”), 11-830(A)(3) (restricting, under certain conditions, local regulation of “use or occupation of land or improvements for agricultural composting”), 3-112(B) (presumption that lawful agricultural operations do not adversely affect public health and safety). Such putative authority called for an examination into the scope of Coconino County’s powers and the extent, if any, to which the state may have preempted them. Yet the trial court did not undertake such an analysis here, relying only upon the doctrine of primary jurisdiction. As we have explained above, however, the doctrine of primary jurisdiction applies to further the coordination between courts and agencies, which represent equal branches of a single government, not to determine the enforcement powers of two different levels of government. Thus, the trial court erred in applying the doctrine of primary jurisdiction when the facts of this case called for an inquiry into the scope of Coconi-no County’s power to act and the possible preemption of such power by the state.
*91
Compare Far East Conference,
CONCLUSION
¶ 27 For the reasons discussed above, we reverse the trial court’s dismissals and remand this matter for further proceedings consistent with this opinion. 5
Notes
. Because the conditional use permit subsequently expired on its own terms, it is not necessary to detail the various facts related to it. It is worth noting, however, that in 2001, ADEQ and the Coconino County Health Department entered into a delegation agreement. See Ariz.Rev.Stat. ("A.R.S.”) section 49-107 (2005) (authorizing such agreements). The agreement provided that “[njothing herein shall preclude [Coconino County] from independently initiating enforcement action pursuant to its own authority under A.R.S. [§§ 36-602 (2003),-603 (2003), 49-143 (2005),-144 (2005)] or any other civil or criminal statute or local ordinance.”
.
Although Anteo never argued that the exhaustion of remedies doctrine applied under the facts at issue here, the doctrine provided the basis for the outcome in several of the cases upon which Anteo relied.
See, e.g., Campbell,
. We also note that Coconino County has alleged that irreparable environmental harm would result from Antco’s continued operations if Coconi-no County were forced to wait for ADEQ to act.
. If the exhaustion of remedies doctrine, which is based on an agency's original, exclusive jurisdiction, does not control when further resort to the administrative process would be futile,
see Moul-ton,
. In light of our resolution of this case, we need not address the issues raised in Antco's cross-appeal or the parties’ requests for interpretation of various state statutes.
