OPINION
¶ 1 Appellants De Alfy Properties and Richard Kay appeal from the trial court’s grant of summary judgment to Pima County in this inverse condemnation action. Because the parties agree the material facts are undisputed, we review the grant of summary judgment de novo to determine whether the trial court applied the law correctly. See
Gonzalez v. Satrustegui,
¶ 2 In 1981, when Kay was the sole owner of the property in question, the Pima County Board of Supervisors authorized construction of a right of way for the west branch (drainage channel) of the Santa Cruz River and the realignment of Valley Road. At the time, Valley Road provided access to Kay’s property from both the north and the south. Access from the south was cut off, however, when construction of the drainage channel was completed in February 1982. Until at least 1988, the county nonetheless planned to reestablish southern access by realigning Valley Road.
¶3 Kay sold the property in May 1982. Within months, the new owner had sold undivided one-half interests in the property to T.J. Corporation and De Alfy. Kay bought T.J. Corporation’s interest in March 1988. Shortly thereafter, Pima County began constructing a park near Valley Road and constructed part of the park on the right of way for the realignment. It completed the park in December 1988. Appellants filed this action in December 1992, seeking compensation for the loss of southern access to the property. The trial court granted summary judgment against appellants, finding that they lacked standing to bring the action and that it was barred by the statute of limitations provided in A.R.S. § 12-526.
¶ 4 We first address whether the action is time barred. Section 12-526 provides a ten-year limitations period for inverse condemnation actions.
Busby v. State ex rel. Herman,
¶ 5 Appellants contend, however, that the limitations period did not commence until December 1988, when the county constructed a portion of the park on Valley Road and effectively abandoned its realignment plan. Thus, they argue, construction of the drainage channel in 1982 constituted only a temporary taking, which did not become permanent until the county abandoned the Valley Road realignment in 1988. In support of their argument, appellants rely on
County of Mohave v. Chamberlin,
¶ 6 In Chamberlin, the plaintiff claimed the county’s sewage effluent had overflowed onto her property and damaged her well. The jury awarded the plaintiff damages and the county appealed, contending the trial court had improperly instructed the jury that the measure of damages was the diminished value of the property. The supreme court agreed the instruction was improper because
there was no permanent “taking” of plaintiffs property. There was no showing that plaintiffs well was permanently contaminated, nor was there a showing ... that the overflow of sewage effluent onto plaintiffs land was an event of ... recurring character. The single occurrence on which plaintiff relies falls far short of meeting such a test. Since there was no permanent injury shown[,] the evidence as to diminished value of the property was inapplicable and the giving of an instruction applying such a yardstick constituted reversible error.
Id,.,
[The plaintiff should] be given an opportunity to amend her complaint on the theory of a “damaging” of her property as distinct from its “taking”.... [F]or a “damaging”, or as some of the courts term it, a “temporary taking”, an entirely different yardstick to the one used in the instant case applies.
Id.
at 430,
¶7 Similarly, this court’s discussion of permanent and temporary takings in
Transamerica Title
related only to the property owner’s measure of damages. There, we said a permanent taking entitles the owner “to be compensated for the value of the property taken plus severance damages, if any, to the remainder” and, for a temporary taking, “[t]he measure of damages ... is the reasonable expense of restoration, and, in a proper case, the loss of use or income for a reasonable time pending restoration.”
1
¶ 8 We thus conclude, based on
Busby
and
Thelberg,
that appellants’ inverse condemnation action accrued when southern access to their property was cut off by construction of the drainage channel in 1982. We reach this conclusion even though the county planned to reestablish southern access by realigning Valley Road. The planned realignment did not toll the running of the ten-year limitations period, but could mitigate appellants’ damages, as
Thelberg
makes clear. “The damages for [impaired access] may be merely nominal or they may be severe. Other means of access ... may be taken into consideration in determining the amount which would be just under the circumstances ... but do[ ] not constitute a defense to the action however.”
¶ 9 Appellants argue, based on
Olson
and case law from other jurisdictions,
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that the county’s abandonment of the Valley Road realignment in 1988 gave rise to a new cause of action and, thus, that their action was timely filed in 1992. We disagree. Although a governmental change of plans gives rise to a new cause of action,
Olson
makes clear that the new cause of action is predicated on a prior condemnation action in which the plans had been considered in mitigation of damages. “[R]eeovery may be had in a subsequent action where the construction plans admitted into evidence in the condemnation suit provided mitigating features as against an item of compensable damage.”
When the plan was implemented and then altered, appellants became entitled to just compensation for any further, resultant economic interference with their property.
We hold that in order to recover damages, each of the appellants must demonstrate that he ... had a portion of his property taken for the original construction project, that he ... relied on [access] in settling or receiving an award for their condemnation claims, and that his remaining property has decreased in value as a result of the highway modifications.
¶ 10 Appellants nonetheless argue that, because the county relied on the realignment to mitigate the landowners’ damages in
Pima County v. Palos Companies Unlimited,
¶ 11 Appellants further argue that the county was equitably estopped to “deny that its removal of Valley Road in 1981-82 was temporary only.” Equitable estoppel, however, requires justifiable reliance before it applies. See
Carlson v. Arizona Dep’t of Econ. Sec.,
¶ 12 Finally, appellants make two public policy arguments in support of their appeal, *42 both of which rely on the distinction appellants draw between a temporary and permanent taking. Because we have already determined that the distinction has no application ■here, we reject appellants’ policy arguments.
¶ 13 We affirm the trial court’s grant of summary judgment against appellants on the ground that the ten-year statute of limitations in § 12-526 bars their inverse condemnation action. Accordingly, we need not address whether they had standing to bring the action. In our discretion, we deny the county’s request for attorney’s fees on appeal.
Notes
. Here, however, the measure of damages is not whether access has been temporarily or permanently impaired, nor the value of the right of access. Rather, the measure of damages is "the difference in the value of the remaining property before and after the access thereto has been destroyed or impaired.”
Thelberg,
