Not surprisingly, the Legislature and Governor have concluded that the taxpayers' plight is intolerable. After all, "for at least 125 years, we have assumed and sometimes held that double taxation is forbidden."3 Last year, the Legislature enacted, and the Governor signed into law, a statute authorizing property owners subject to the multiple taxation to petition this Court directly to determine which county is owed the taxes.4 In this proceeding under that statute, we hold that we have original jurisdiction and that taxes on relators' property are owed to San Patricio County.
I
A
Relators (collectively, "Oxy"5 ) own two massive commercial piers extending from the mainland of San Patricio County into the waters of Corpus Christi Bay that lie in Nueces County. Alpha Pier, some 1,100 feet long and 80 feet wide, extends into the Corpus Christi Channel of the Bay. It was constructed by the Army Corps of Engineers and operated by the United States Navy until 2010. Oxy acquired Alpha Pier and its docks in 2012. Beta Pier is approximately 500 feet long and extends into the La Quinta Channel of the Bay. At its end, a perpendicular walkway extends 550 feet in each direction. Oxy constructed Beta Pier around 1990 and continues to own and operate it. Both Piers, anchored by concrete piles deeply embedded in the floor of the Bay, are permanent, immovable structures. The Piers and the equipment on them are used to load crude oil and industrial chemicals onto large, international tankers. Aerial photographs of the Piers are included in the Appendix to this opinion.
*151San Patricio County and Nueces County have each assessed taxes on Oxy's Piers, and Oxy has paid taxes to both, though it has done so under protest in order to preserve its contention that it has been double-taxed and obtain a refund. In 2009, San Patricio County sued Nueces County in the district court in Refugio County to determine which of them has authority to tax property affixed to the land but extending out into the water.6 That suit remains pending. Oxy petitions this Court to resolve in this original proceeding the counties' dispute in their pending litigation. Oxy does not take sides in that dispute, urging only that it be freed from double taxation. Nueces County contends that the Court lacks jurisdiction over this proceeding.
This is but the latest chapter in these counties' 46-year history of boundary litigation. To provide the context for the arguments before us, we briefly survey that history.
B
Counties are creatures of the Legislature.7 In the early days of Texas' statehood, the Legislature frequently redefined county boundaries and created new boundaries as Texas grew and changed. The 1846 boundary between San Patricio County and Nueces County was described as "following the meanders" of Corpus Christi Bay.8 Boundary disputes can arise between counties, especially over boundaries defined in reference to a body of water, which can be dynamic and difficult to ascertain. In 1897, the Legislature authorized counties to sue each other "for the purpose of establishing the boundary line between them."9 That statute, now codified as Section 72.009 of the Local Government Code, provides that suit must be brought in the district court of the closest, adjoining county "whose boundaries are not affected by the suit".10 "The district court has jurisdiction to determine where the boundary line is located and may order the line to be re-marked and resurveyed."11 "The line established by the district court shall be treated as the true boundary between the counties unless the court determines that the line in question was established under prior law."12
In 1972, San Patricio County sued Nueces County in the district court of neighboring Refugio County "to determine the boundary between the two counties running along the Nueces River, and the Nueces, Corpus Christi, and Redfish Bays, and to recover taxes which it claimed that Nueces County wrongfully assessed on the San Patricio County side of the boundary."13 The counties disputed whether *152statutes then delineating their boundaries set the dividing line in the center of those waterways, as San Patricio County argued, or at the shoreline, as Nueces County argued.14 The case remained pending for 17 years. Finally, in 1989, the trial court granted summary judgment for Nueces County.15 The court of appeals reversed because the judgment failed to dispose of San Patricio County's claim that the shoreline had moved or been modified by natural processes, such as erosion, or by human intervention, such as dredging.16 The court remanded the case "for trial of the issue of which county includes the modifications in question within its boundaries."17 The "modifications in question" did not include piers, docks, and other facilities, as the counties had never specifically contested the authority to tax them.
Fourteen years later, in 2003, the trial court rendered a final judgment. The court "decreed that the common boundary line between San Patricio and Nueces Counties" runs "along the northerly shoreline[ ] of ... Corpus Christi Bay" and that "San Patricio County shall lie northerly of that line" and "Nueces County shall lie southerly of that line". The judgment defines "shoreline" as "the point at which the waters of the bays meet the mainland at mean lower low tide." On the remanded issue, the judgment declares: "Past and future natural and artificial modifications to the shoreline of San Patricio County shall form a part of San Patricio County." Post-judgment litigation continued until 2008 but did not result in any change to the judgment.18
In 2009, San Patricio County filed a new Section 72.009 suit in Refugio County district court to enjoin Nueces County from taxing certain properties, including Oxy's Beta Pier, that were built in San Patricio County but extend into the water in Nueces County. San Patricio County claimed the properties were on its side of the boundary under the 2003 judgment.19 On Nueces County's motion, venue was transferred to Nueces County,20 where the case sat inactive for years while San Patricio County pursued mandamus relief, ultimately unsuccessfully.21 In 2014, the district court granted summary judgment for Nueces County, dismissing all of San Patricio County's claims.22 The court of appeals reversed, concluding that under Section 72.009, the case should be heard in Refugio County after all.23 This Court denied review.24 The court of appeals' mandate issued in October 2017.
The case again lay dormant for about eight months. In June 2018, the counties'
*153counsel wrote jointly to the Refugio County district court requesting a status conference to discuss pending summary judgment motions. Their letter states: "The parties have agreed, subject to your approval, that the pivotal/dispositive issue to be decided is a legal question." The parties represent in their briefs to this Court that a summary judgment hearing is set for later this month.
C
Since at least 2008, both San Patricio County and Nueces County, and taxing units within the counties, have been assessing ad valorem taxes25 on the Piers.26 To protect its right to an eventual refund, Oxy has paid tax bills under protest and pursued administrative and legal remedies.27 Pending suits against each county await a determination by a court with jurisdiction over both counties whether the Piers are located in one or the other. Other taxpayers are in the same predicament.28
In 2017, the Legislature intervened, enacting Section 72.010, a bracket bill affecting only the dispute between San Patricio and Nueces Counties.29 The statute provides:
(c) If, as a result of disputed, overlapping, or erroneously applied geographic boundaries between like taxing units, multiple like taxing units have imposed ad valorem taxes on the same property, the property owner may file suit in the supreme court to:
(1) establish the correct geographic boundary between the taxing units; and
(2) determine the amount of taxes owed on the property and the taxing unit or units to which the taxes are owed.
(d) The supreme court has original jurisdiction to hear and determine a suit filed under Subsection (c) and may issue injunctive or declaratory relief in connection with the suit.30
*154The statute directs the Court to "enter a final order ... not later than the 90th day after the date the suit is filed."31 At the same time, the Legislature amended the Tax Code to require the chief appraiser of an appraisal district affected by the Court's order to correct its rolls and records "as necessary to reflect the ... order" within 45 days of its issuance.32
Invoking Section 72.010, Oxy filed an original petition for a writ of mandamus in this Court on July 19, 2018, naming Nueces County and San Patricio County as real parties in interest. The petition names as respondents each county's chief tax appraisers and assessors and the state Commissioner of the General Land Office ("the GLO"). Oxy prays that the Court determine which county is authorized to tax the Piers and to order the other and its taxing authorities to remove the Piers from their tax rolls and refund improperly collected taxes. Oxy takes no position on which county should prevail. Oxy argues that the amount of taxes to be refunded must be determined in the pending taxpayer suits after this Court renders judgment.
We expedited briefing and oral argument.
II
San Patricio County and the GLO agree that the Court has jurisdiction over Oxy's petition under Section 72.010. Nueces County challenges the Court's jurisdiction and the constitutionality of Section 72.010.33
A
This Court's original jurisdiction is derived solely from Article V, Section 3(a) of the Texas Constitution, which provides that "[t]he Legislature may confer original jurisdiction on the Supreme Court to issue writs of quo warranto and mandamus in such cases as may be specified, except as against the Governor of the State."34 The provision expressly imposes two limits on the Legislature's authority: a grant of original jurisdiction must be to issue writs of quo warranto and mandamus, and those writs cannot issue against the Governor. Inherent in the constitutional provision are three other "limitations on the power of the Legislature to specify classes of cases which may be brought within the court's original jurisdiction", as we explained in our 1930 decision in Love v. Wilcox :
One is that the right to the duty required to be performed by mandamus shall not be 'dependent upon the determination of any doubtful question of fact.' Another limitation is that the writ of quo warranto or mandamus be a proper or necessary process for enforcement of the right asserted. A third is there must be some strong and special reason for the exercise of this extraordinary original jurisdiction by a court designed primarily as the court for the *155correction by appellate review of errors of inferior courts in determining questions of law.35
The "strong and special reason" test is satisfied, we said, "where the proceeding 'involves questions which are of general public interest and call for a speedy determination.' "36 "[T]he remedy of mandamus must be pursued in the lower courts unless it is made plain that urgent necessity calls for the exercise of the original jurisdiction of the Supreme Court."37 We concluded in Love that the Legislature had not exceeded its authority in conferring original jurisdiction on this Court to issue mandamus compelling officials of political parties to perform their duties under the law.38
We revisited Love in 2011, in In re Allcat Claims Service, L.P.39 That case involved expansions of the state's franchise tax the Legislature had enacted to fund public education ("the Act").40 "For the first time limited partnerships and certain other unincorporated associations were required to pay the tax."41 The Texas Constitution provides that any law "impos[ing] a tax on the net incomes of natural persons, including a person's share of partnership and unincorporated association income," cannot take effect until approved by voters in a statewide referendum.42 Anticipating that this provision might be used to challenge the Act as imposing an income tax without voter approval on individuals owning limited partnerships and unincorporated associations newly subject to the franchise tax, the Legislature included a grant of original jurisdiction to this Court and a 120-deadline to rule:
(a) The supreme court has exclusive and original jurisdiction over a challenge to the constitutionality of this Act or any part of this Act and may issue injunctive or declaratory relief in connection with the challenge.
(b) The supreme court shall rule on a challenge filed under this section on or before the 120th day after the date the challenge is filed.43
Allcat Claims Service, a limited partnership, filed an original petition for mandamus in this Court, naming the state Comptroller of Public Accounts as the respondent. Allcat argued that the amendments were unconstitutional both facially and as applied by the Comptroller in interpreting and enforcing the law.44 It sought a declaration that the Act is unconstitutional, an order directing the Comptroller to refund franchise taxes that Allcat had paid under protest and that were traceable to its natural-person partners' shares of Allcat's income, and an injunction against the Comptroller from continuing to enforce the law against Allcat.45
Though the Comptroller did not contest our jurisdiction,46 we addressed the issue *156at the outset. The authority to issue mandamus, though not mentioned in the legislative grant, was implied, we said, because "[t]he Act clearly expresses legislative intent that the Court consider the constitutionality of its provisions", and "mandamus is a 'proper or necessary process for enforcement of the right asserted' because Allcat seeks an order directing the Comptroller to refund part of the taxes it paid."47 And while in Lane v. Ross we had held that "this court has no original jurisdiction to issue a writ of injunction", citing Article V, Section 3(a), we had also held that "[i]n cases in which this court's jurisdiction to issue a writ of mandamus has attached the court necessarily has the correlative authority to issue a writ of injunction to make the writ of mandamus effective."48 "The same," we added in Allcat , "may be said of declaratory relief."49 Thus, we concluded, the Act conferred on the Court original jurisdiction to issue the writ of mandamus together with "the correlative authority to provide declaratory and injunctive relief as appropriate."50 And "[i]f the grant of jurisdiction or the relief authorized by the statute exceeds the limits of Article V, Section 3(a), then we simply exercise as much jurisdiction over the case as the Constitution allows, as we did in Love ."51 Thus, we concluded, the Act's grant of original jurisdiction to this Court "does not violate Article V, Section 3(a) ; and it gives this Court original, exclusive jurisdiction to consider the facial challenge to the Act's constitutionality to determine whether mandamus should issue directing the Comptroller to refund taxes that Allcat paid under protest."52 But, we added, we lacked jurisdiction over Allcat's as-applied challenge because the Act did "not authorize th[e] Court to exercise original jurisdiction over challenges to how the Comptroller assesses, enforces, or collects the franchise tax."53
B
Oxy argues that this case, like Allcat , involves a challenge to the legality of taxation, a statutory grant of original jurisdiction that expressly authorizes injunctive and declaratory relief without mentioning mandamus, and an assertion that a government official abused his discretion by collecting a tax illegally. San Patricio County and the GLO agree. Nueces County alone challenges our jurisdiction over the case. It argues that Section 72.010 violates each of the three jurisdictional limitations we announced in Love .
1
Nueces County first argues that the Court lacks jurisdiction because Section 72.010 requires the Court to make fact findings, which, we said in Love , we cannot do.54 Importantly, Nueces County does not argue that fact issues must be resolved before its boundary dispute with San Patricio *157County can be resolved. As we have already noted, both counties have represented to the district court in Refugio County that "the pivotal/dispositive issue to be decided is a legal question." Rather, Nueces County argues that even though this Court, like the district court, can resolve the dispute as a matter of law, Section 72.010 still requires the Court to make fact findings in the process.
Subsection (c) authorizes a property owner to file suit in this Court to establish boundaries and determine taxes owed. It plainly does not require the Court to do either one if fact issues are involved. In an oral argument exhibit, Nueces County has listed seven other fact issues that the Court must decide before granting Oxy any relief.55 But as it has told the district court, none is involved in resolving the dispositive legal question in the counties' dispute. Oxy acknowledges that there may be fact issues regarding how much tax is owed, which await adjudication in the tax protest cases. It does not ask this Court to resolve those issues, and they do not preclude us from deciding to which county taxes are owed. Even if there were other such fact issues that could be resolved, then as we said in Allcat , "we simply exercise as much jurisdiction over the case as the Constitution allows".56
Determining the counties' legal authority to tax Oxy's Piers is not, in Love 's words, "dependent upon the determination of any doubtful question of fact."
2
Love 's second limitation on a legislative grant of original jurisdiction is that mandamus must be "a proper or necessary process for enforcement of the right asserted".57 Allcat held that mandamus is a proper or necessary process for determining the constitutionality of the franchise tax and prohibiting its collection. Nueces County argues that Allcat is distinguishable because this case does not involve a constitutional challenge, but the distinction is one without a difference. In both cases, the authority to tax, and the right to be free of the tax, depend on the validity of the assessment. At bottom, Oxy's petition is based on the constitutional requirement that property be taxed only in the county in which it is located.58 In this case as in Allcat , the right to mandamus relief is predicated on the resolution of a legal question. Nueces County also argues that mandamus is precluded because Section 72.010 does not expressly authorize it, but in Allcat we rejected that very argument made against the grant of original jurisdiction there.59
The dissent concedes that one of the counties is "incorrect[ly]" taxing Oxy but is "not convinced that the counties' refusal to refund the taxes pending a resolution of *158the dispute is either an abuse of discretion or a violation of a ministerial legal duty."60 In other words, in the dissent's view, counties have the discretion to double tax taxpayers.61 We disagree. Either Nueces County or San Patricio County has persisted, for 10 years, in taxing property without the power to do so, knowing that the same property was also being taxed by the other county, leaving taxpayers no remedy but to pay under protest and wait. We view that conduct by the government as an abuse of discretion.
Nueces County argues that the tax protest suits Oxy has filed are an adequate remedy, but none of them can determine to which county Oxy owes its taxes. Oxy's remedy is to wait 46 years, or even 10 years, for counties to obtain a judgment that one of them must refund taxes, a result neither has shown a pressing interest in achieving. That is not an adequate remedy, in any sense of the word, for double taxation.
We must note that the district court's jurisdiction in a Section 72.009 action to determine which county is authorized to tax Oxy's property is not entirely clear. Section 72.009 authorizes one county to sue another "to establish the common boundary line"62 and provides that "[t]he district court has jurisdiction to determine where the boundary line is located".63 Nueces County and San Patricio County agree that their 2003 judgment establishes their boundary as the shoreline. There is no question that Oxy's Piers are affixed to the land in San Patricio County and extend beyond, and above, the shoreline across the water in Nueces County. The locations of the boundary and Piers are not disputed. Determining which county can tax them depends on the effect of the boundary. We need not decide the extent of the district court's jurisdiction, having concluded that the proceeding there is not an adequate remedy for Oxy in any event, but the uncertainty regarding the relief that court can provide is further reason to consider the proceeding inadequate for Oxy.
Not only is the mandamus relief afforded by Section 72.010 proper, it is necessary in that it is the only reasonably effective relief Oxy and other taxpayers along the Nueces County-San Patricio County border have, or have ever had.
3
Love 's third limitation is that there be a "strong and special reason for the exercise of ... extraordinary original jurisdiction" to resolve "questions which are of general public interest and call for a speedy determination".64 Nueces County argues that delay cannot be a sufficient reason because recent progress-in the past three months-in the Refugio County district court obviates the need for extraordinary mandamus relief, and in any event, the issue is of interest only to two counties and a handful of taxpayers, not the general public.
Nueces County's profession of an interest in expediting proceedings in the district court comes years too late. Actions *159speak louder than words. From 1972 to 2003, the counties exhibited no urgency whatsoever in resolving their boundary dispute. Their conduct since 2008, when the double taxation began, has been little different. The dissent dismisses the delay as "unfortunate" and "mostly irrelevant to the issue of whether a 'strong and special reason' existed for the legislature to authorize an original action in this Court."65 The delay, the dissent notes, is merely the result of the counties' and courts' "follow[ing] proper trial and appellate procedure" throughout the history of the case.66 But even assuming that litigating a dispute for 46 years could be characterized as "proper trial and appellate procedure", the Legislature could well have determined that the protracted delay, at a constant and mounting burden to taxpayers, is a "strong and special reason" to confer original jurisdiction in this Court to resolve the matter.
The dissent argues that Oxy "must first pursue that relief 'in the lower courts' " and "must pursue its rights in the ordinary fashion".67 But Oxy is not a party to that action and cannot be. Section 72.009, the basis for the action, only allows counties to sue each other.68 Oxy has no relief to pursue there, in an ordinary fashion or any other way. The counties can pursue relief against each other, but that relief is theirs, not Oxy's.
In any event, we think the blatant double taxation of the property involved here is alone a "strong and special reason" for extraordinary mandamus relief. We have not found another instance of such conduct in the State's history. The counties might have avoided the burden to their taxpayers by agreeing that one would assess taxes and the two would split them until their dispute was resolved. Presumably, the taxpayers would not have protested. They might have done this at any time, and since last year, Section 31.112(c) of the Tax Code, added with Section 72.010, expressly authorizes Nueces County and San Patricio County to resolve their dispute by agreement.69 As it is, without the mandamus relief afforded by Section 72.010, Oxy and other taxpayers would have no choice but to continue paying millions of dollars in taxes on the same property to both counties.70
Unquestionably, less is at stake here than in Allcat . There, the validity of the franchise tax affected taxpayers throughout the State and the entire public fisc. The tax issue now before us involves only a few taxpayers and a small fraction of the revenue, though Oxy argues it will affect commercial activity in the Corpus Christi Bay area. Nevertheless, we think unprecedented double taxation by counties for so prolonged a time, involving significant *160sums, and with the counties' unable to resolve their dispute, raises an issue "of general public interest" that "call[s] for a speedy determination."71 The matter is for this Court to decide, but the Legislature and Governor, too, are charged with an awareness of the Love factors. Section 72.010 passed the Senate unanimously,72 passed the 150-member House with but one dissenting vote,73 and was signed by the Governor.74 Our assessment of the importance of the relief afforded is consistent with that of the people's representatives.
The dissent dismisses the seriousness of the taxpayers' situation. The legislative consensus in enacting Section 72.010 was merely "well-intentioned",75 the predicament of Oxy and other taxpayers is "sympathetic" but not compelling, and the years-long delays are simply "unfortunate",76 but Allcat 's reasoning was "more creative than convincing" and its result doubtful,77 double taxation may not even be an abuse of discretion,78 and Oxy should somehow "pursue ... relief 'in the lower courts' " that is available only to the counties,79 and "pursue its rights in the ordinary fashion" that does not exist.80 We disagree.
C
By constitutional design, this Court's primary role is to sit as the court of last resort in civil cases81 that "present[ ] ... question[s] of law that [are] important to the jurisprudence of the state."82 If we are to fulfill our constitutional duties to act as the final arbiter in the most important civil cases and to decide those cases with expediency, our original jurisdiction must remain limited.
Original jurisdiction of disputes like this one is a significant burden on the judicial system. For every case the Court hears, another case equally worthy of review must be turned down. Those costs are compounded here by the mandate in Section 72.010(e) that the Court "enter a final order determining" the complex issues raised by the parties in 90 days.83 The *161deadline has required that this case be given immediate and expedited attention. Nueces County challenges the deadline as an intrusion in the operation of the judiciary in violation of the separation of powers. We need not address that challenge because the case has been decided within the time frame contemplated by the statute. But as we noted in Allcat , the challenge is a serious one.84
In the end, a dispute between counties for nearly half a century now burdens taxpayers with double assessments and multiplying protest litigation. Not only is the end not in sight, the counties' commitment to a timely resolution is not apparent. Consistent with Love and Allcat , we conclude that this unique case presents a compelling reason for us to exercise original jurisdiction.
III
Nueces County also contends that Section 72.010 violates the Texas Constitution's prohibition against retroactive laws, which states: "No bill of attainder, ex post facto law, retroactive law, or any law impairing the obligation of contracts, shall be made."85 Nueces County argues that Section 72.010"impairs a vested right" belonging to it, namely, the right to continue litigating in the Refugio County district court. Nueces County also contends that Section 72.010 overturns prior judgments entered over the course of the litigation.
In Robinson v. Crown Cork & Seal Co. ,86 after an extensive analysis of our prior decisions and federal jurisprudence on retroactivity, we expressly rejected the vested-rights test, explaining that "[w]hat constitutes an impairment of vested rights is too much in the eye of the beholder to serve as a test for unconstitutional retroactivity."87 We reasoned that "[n]o bright-line test ... [was] possible" and announced that courts should instead assess three factors: "the nature and strength of the public interest served by the statute as evidenced by the Legislature's factual findings; the nature of the prior right impaired by the statute; and the extent of the impairment."88 Importantly, we also clarified that "[u]nder this test, changes in the law that merely affect remedies or procedure, or that otherwise have little impact on prior rights, are usually not unconstitutionally retroactive."89
Since Robinson , we have repeated that "applying procedural, remedial, or jurisdictional statutes retroactively does not violate the Constitution's prohibition on retroactive laws."90 Our analysis in University of Texas Southwestern Medical Center v. Estate of Arancibia is particularly instructive here. That case involved an amendment to the presuit notice requirement in the Tort Claims Act that was enacted after the underlying medical malpractice case was filed.91 The amendment expressly made the notice requirement jurisdictional-which affects the procedural path of a *162challenge to the plaintiff's having met the requirement-and one issue before us was whether the amendment applied in the underlying case.92 We held that it did.93
Our analysis turned on the new law's status as a jurisdictional rule. "[A]pplication of a new jurisdictional rule generally takes away no substantive right but simply impacts a tribunal's power to hear the case," we explained.94 We noted that the "Supreme Court of the United States has 'regularly applied intervening statutes conferring or ousting jurisdiction, whether or not jurisdiction lay when the underlying conduct occurred or when the suit was filed.' "95 And we declared that "[s]tatutes ... that do not deprive the parties of a substantive right and 'speak to the power of the court rather than to the rights or obligations of the parties' may be applied to cases pending at the time of enactment."96
The Robinson factors and Section 72.010's status as a jurisdictional statute defeat Nueces County's retroactivity challenge. We have identified the public interest served by the statute in concluding that there is a "strong and special reason" for us to exercise the jurisdiction conferred by the statute. Moreover, the only "right" that Nueces County identifies as having been impaired is its preference for continuing to litigate in Refugio County district court before any review by this Court takes place. Substituting review in this proceeding for later review on appeal is not unconstitutionally retroactive.
We also reject Nueces County's contention that Section 72.010 reverses any judgment previously rendered in the boundary litigation. To the contrary, as we now explain, the 2003 judgment's establishment of the counties' boundary as the shoreline, considered in light of the common law, determines which county may tax the Piers.
IV
We come at last to the issue whether Nueces County or San Patricio County is owed the taxes due on Oxy's Piers.
As we have discussed, the 2003 judgment establishes the "shoreline" as "the point at which the waters of the bays meet the mainland at mean lower low tide" and provides that "[p]ast and future natural and artificial modifications to the shoreline of San Patricio County shall form a part of San Patricio County." San Patricio County argues that Oxy's Piers are "artificial modifications to the shoreline" within the meaning of the 2003 judgment. Nueces County counters that the litigation leading up to the judgment involved whether the location of the shoreline had been altered by dredging in the waterway, not by piers or other facilities. The mere fact that piers and other facilities were not part of the evidence and argument in the trial leading to the 2003 judgment does not preclude characterizing them as modifications. But we agree with Nueces County that piers, docks, and related facilities cannot fairly be said to alter a shoreline as dredging does. We also agree with Nueces County that private persons cannot alter county boundaries merely by constructing improvements across them. We do not think it reasonable to consider Oxy's Piers as *163spine-like extensions of San Patricio County's boundary. But all agree that the 2003 judgment's establishment of the shoreline as the counties' boundary is determinative, and so do we.
Taxation is justified by the assumption that the government will render services of equivalent value in protecting one's person and property, in adding to the value of one's property, and in creating and maintaining public conveniences in which one shares, like roads, bridges, sidewalks, pavements, and schools for the education of children. Nueces County cannot practically render services such as fire and police protection to Oxy's Piers, while San Patricio County can easily access the Piers from the land. Nueces County can do little, if anything, to improve the value of Oxy's Piers, and nothing to provide public conveniences, as San Patricio County can.
Although no Texas court has ever addressed the issue of whether piers and similar facilities constructed along a shoreline that forms the boundary between two local jurisdictions should be treated a part of the land or part of the water, courts in other jurisdictions have done so.
In Udall v. Trustees of Brooklyn , the question was whether the Village of Brooklyn had jurisdiction to fine Udall for acting as a public measurer, without a license from the Village.97 Udall argued that the Village had no jurisdiction over him because his business was located on a wharf constructed out from the shore and past the low-water mark and that the Village's jurisdiction was limited to the lands above the low-water mark.98 The New York court rejected Udall's arguments, concluding that the boundary of Kings County, which was defined as the land above the low-water mark of the East River, included wharfs constructed out into the East River.99 "We are of opinion that Kings County [in which the Village was located] includes all the wharves and made land on the Long Island shore of the East River, as well as natural alluvion, to the actual line of low water."100 The New York Court of Appeals expressly approved this holding in Orr v. City of Brooklyn :
The jurisdiction of the city of Brooklyn must, from necessity, follow the shore as it advances into the river or bay, whether the accretion proceeds from alluvion or artificial deposits and erections. This is asserted in Udall v. Brooklyn (19 Johns., 175). I concur in this decision. The wharves or piers are a part of the shore, and, as they were necessarily above the surface of the water, they were above the low water mark which gave jurisdiction.101
A similar result was reached by the Maryland Court of Appeals in determining the boundary between the City of Baltimore and County of Baltimore.102 In that case, the question was whether piers that were constructed out into the Patapsco River from its northern shoreline were within the jurisdiction of the City of Baltimore, on the land side of the shoreline boundary, or Baltimore County, on the river side.103 The court concluded that the piers should be treated as an extension of the shoreline rather than as a part of the *164river.104 The court noted that riparian owners of the land along the shoreline had the right to construct docks and piers.105 It rejected the idea that a rational legislature would ever have intended for the piers to be treated for taxation purposes as if they were "cut in two at the point of high-water mark".106 The piers, the court reasoned, were useless except for their connection to the land, and were entirely dependent on the City of Baltimore for police and fire protection.
It would seem, therefore, to be perfectly clear that the Legislature never intended that such improvements as these should, for the purposes of taxation, be cut in two at the point of high-water mark on the bank of the river when they were made, and part be taxed by the city and the rest by the county. Without the right to use the land, which is in Baltimore city, the improvements would be useless, and, as they are incident to that land and dependent upon it for their existence, it would be an anomalous condition of affairs if they were to be thus divided. They are so situated as to be dependent upon the city for police and fire protection, and if the appellant's theory be correct they would practically have neither, as this water is separated from Baltimore county and it would be impossible to furnish the appellant with proper fire or police protection on these piers, unless the county made special provision for them, which would practically be impossible without the assistance of the city.107
The same logic applies in construing the 2003 judgment in this case.
This result is consistent with the common law and statutory rights of littoral and riparian owners. The right to construct docks, piers, and similar facilities is subservient to the ownership of property abutting the natural shoreline.108 "Littoral rights are appurtenant to the land which borders a lake or sea."109 "Littoral rights, at common law, consist of the right of access to the water, the right to any accretions, and the right to build wharves, docks, and piers."110 The right of a littoral owner to construct docks, piers, and similar facilities arises out of the ownership of the abutting shoreline, not the water. "These rights all pertain to the use of abutting land in connection with the water, or of the water in connection with the land. The right to use beyond the low-water mark rests upon the title to the bank, and not to the bed of the water."111 "[T]he right to construct moles or piers; i.e. to *165wharf out, belong[s] to the owner of the adjacent land."112
The common law thus firmly recognizes that the right to construct docks, piers, and similar facilities from the shore into the water springs from the ownership of the upland property bordering the shore, rather than from the submerged lands on which portions of those facilities are constructed. The common law therefore supports treating docks, piers, and similar permanent facilities that are connected to the mainland of San Patricio County as a part of that county. The taxes owed by Oxy on its Piers are due San Patricio County, not Nueces County.
V
Finally, Nueces County argues that even if its taxing authorities have assessed taxes against Oxy without authority to do so, mandamus relief is inappropriate because they have acted in reliance on valid statutes requiring the assessment of taxes. Taxing Oxy's Piers, if unauthorized, was a mistake, not an ultra vires act correctable by mandamus.
We rejected a similar argument in Allcat . There, the Comptroller contended that even if the franchise tax were unconstitutional, "mandamus relief [could] never be appropriate" because "an official does not abuse her discretion by enforcing a statute that is later determined to be unconstitutional."113 Our explanation was simple: "[I]f Allcat [were] correct and the Act [were] unconstitutional, then the Act [did] not provide legal authority for the Comptroller to retain the taxes and Allcat [would] be entitled to mandamus directing a refund."114 By the same reasoning, if tax statutes do not provide Nueces County the legal authority to assess and retain taxes on Oxy's Piers, Oxy is entitled to mandamus relief.
VI
Accordingly, we direct the Nueces County Appraisal District to withdraw and cease from issuing tax assessments to Oxy for its Piers and other facilities which we have held to be part of San Patricio County. We are confident the District will promptly comply. Our writs of mandamus and injunction will issue only if it does not.
Justice Brown filed a concurring opinion, in which Justice Boyd and Justice Blacklock joined in part.
Justice Boyd filed a dissenting opinion, in which Justice Blacklock joined.
Justice Guzman did not participate in the decision.
APPENDIX
*166Justice Brown, joined in part by Justice Boyd and Justice Blacklock, concurring.
I join the Court's opinion in full but write separately to emphasize constitutional concerns about the statutorily imposed deadline for resolving this case. The legislature has afforded us ninety days after the date a boundary-dispute suit is filed in this Court to enter a final order. TEX. LOC. GOV'T CODE § 72.010(e). Today, we have met that deadline. But our compliance should not be mistaken for acquiescence to either the constitutionality or advisability *167of a three-month window to dispose of this case or others like it.
The ninety-day deadline raises fundamental questions about our constitutional separation of powers. To what extent can the legislature instruct the judiciary-a co-equal branch of government-in how and when to conduct its business? The constitutional answer we know for certain is that the legislature has a real say in what cases this Court can hear: "The Legislature may confer original jurisdiction on the Supreme Court to issue writs of quo warranto and mandamus in such cases as may be specified, except as against the Governor of the State." TEX. CONST. art. V, § 3 (a). The constitution does not, however, explicitly vest the legislature with authority to dictate how the Court decides those cases or how long it may take to decide them. Rather, it speaks affirmatively and explicitly about the separation of powers between the branches of our state's government:
The powers of the Government of the State of Texas shall be divided into three distinct departments, each of which shall be confided to a separate body of magistracy, to wit: Those which are Legislative to one; those which are Executive to another, and those which are Judicial to another; and no person, or collection of persons, being of one of these departments, shall exercise any power properly attached to either of the others, except in the instances herein expressly permitted.
Id. art. II, § 1.
This is not the first time these concerns have arisen. Most recently, this Court considered an original-jurisdiction case with a statutory deadline in In re Allcat Claims Services, L.P. . Citing article 2, section 1, Justice Willett wrote separately in Allcat that the 120-day deadline at issue "raises a constitutional eyebrow" because it "threatens to interfere with our sworn adjudicatory duties under our Constitution." 356 S.W.3d 455, 485-86 (Tex. 2011) (Willett, J., concurring in part and dissenting in part). Simply put, as the final arbiter of complex, high-stakes legal disputes that affect all Texans to some degree, this Court needs to spend whatever time it takes to get it right. The timely resolution of any case before this Court is important, but not at the expense of correctness or fairness to the parties actually involved. In my view, separation-of-powers questions arise when a legislative mandate tips the scales toward timeliness at the expense of correctness and fairness.
The deadline in this case might well pass constitutional muster. I have neither decided nor prejudged the question. And because we were able to meet the deadline, I agree with the Court that we should reserve judgment on the constitutional question. See Brooks v. Northglen Ass'n , 141 S.W.3d 158, 169 (Tex. 2004) ("[W]e are obligated to avoid constitutional problems if possible."). Even if the deadline were unconstitutional, I would still try to "cooperate with priorities expressed by other branches of government so long as we fulfill our constitutional duties and neither impair our judicial prerogatives and functions, nor impair the rights of the parties." See Allcat , 356 S.W.3d at 474 (emphasis added). The legislature wanted a speedy disposition of a boundary-dispute case filed in this Court. So be it. We were able to comply, and I am confident our work did not suffer for it. We need not reach to litigate the constitution.
However, I believe this Court's capacity to "cooperate with the priorities expressed" by the legislature in the future is best served by flagging-repeatedly, if necessary-the constitutional tension underlying a time-constrained conferral of original jurisdiction on this Court. I expect this Court will continue in the spirit of *168cooperation. But our core constitutional duty to decide cases correctly, competently, and fairly-a duty uniquely vested in the judiciary-must remain paramount. Should we see a proliferation of similar statutory deadlines, or encounter a single deadline that is especially onerous, there is no guarantee this Court, even when cooperating in good faith, can comply. My hope, and my reason for writing separately, is that we never get to that point.
Justice Boyd, joined by Justice Blacklock, dissenting.
"By constitutional design, this Court's primary role is to sit as the court of last resort in civil cases ...." Ante at 160 (emphasis added). In this case, Oxy1 asks us to exercise original jurisdiction-to sit as a court of first resort-to determine in the first instance whether Oxy's piers, docks, and related facilities lie within (and are thus taxable by) San Patricio County or Nueces County. Yet as all the parties acknowledge, the Refugio County district court has scheduled a hearing to resolve that very issue on summary-judgment motions on October 24, 2018, just twelve days after the Court intervenes today. The record presents no "strong and special reason" for this Court to interfere with the ordinary litigation process on an artificially rushed timeline2 to resolve a dispute the trial court is-as one might say-fixing to resolve. The lack of any "strong and special reason" does not just make the Court's decision to exercise original jurisdiction inadvisable, it makes the legislature's otherwise well-intentioned attempt to grant us original jurisdiction unconstitutional. Because the Court exercises jurisdiction the Constitution does not permit, I must respectfully dissent.
I.
Section 72.010
Oxy asserts that section 72.010 of the Texas Local Government Code -a "bracket bill" the legislature passed last year specifically to permit Oxy to file this case-grants this Court original jurisdiction. Section 72.010 authorizes a property owner to file suit in this Court to "establish the correct boundary between the taxing units" and "determine the amount of taxes owed on the property and the taxing unit or units to which the taxes are owed." TEX. LOC. GOV'T CODE § 72.010(c). Subsection (d) provides that this Court "has original jurisdiction to hear and determine [such] a suit ... and may issue injunctive or declaratory relief in connection with the suit." Id. § 72.010(d). So as Oxy asserts and the Court concludes, the legislature has undoubtedly made the policy choice to grant this Court original jurisdiction to address Oxy's complaints.
But the question is not simply whether the legislature granted us original jurisdiction in section 72.010. Instead, we must consider whether the Texas Constitution authorized the legislature to grant us original jurisdiction as it did in section 72.010. However well-intentioned, the legislature simply "cannot confer a jurisdiction not permitted by the Constitution." Love v. Wilcox , 119 Tex. 256, 28 S.W.2d 515, 522 (1930) (orig. proceeding) (citing *169Marbury v. Madison , 5 U.S. 137, 138, 1 Cranch 137, 2 L.Ed. 60 (1803) ; Ex parte Towles , 48 Tex. 413, 422 (1877) ). The Constitution expressly authorizes the legislature to grant this Court original jurisdiction, but only "to issue writs of quo warranto and mandamus in such cases as may be specified." TEX. CONST. art. V, § 3 (a). Section 72.010 does not grant us jurisdiction "to issue writs of quo warranto or mandamus"; instead, it authorizes us to "establish the correct geographic boundary," "determine the amount of taxes owed," and "issue injunctive or declaratory relief." TEX. LOC. GOV'T CODE § 72.010(c) - (d).
Nevertheless, the Court holds that section 72.010impliedly authorizes us to grant mandamus relief, relying on our decision in In re Allcat Claims Service, L.P. , 356 S.W.3d 455, 460 (Tex. 2011) (orig. proceeding). Ante at 157. Like section 72.010, the statute at issue in Allcat granted this Court original jurisdiction without expressing that we should or could use that jurisdiction to issue writs of quo warranto or mandamus. Allcat , 356 S.W.3d at 462. Making no effort to compare or contrast the two statutes, the Court summarily concludes today that, because the Allcat statute impliedly granted the Court original mandamus jurisdiction, section 72.010 does as well. Ante at 156.
The Court's reliance on Allcat raises far more complicated issues than its brief discussion suggests. We held that the Allcat statute impliedly granted this Court jurisdiction to issue a mandamus writ because it granted us "exclusive and original jurisdiction" over "all taxpayer suits challenging the constitutionality" of the state's franchise-tax act, and because Allcat sought "an order directing the Comptroller to refund part of the taxes it paid." Allcat , 356 S.W.3d at 462, 472. I find Allcat 's reasoning more creative than convincing, primarily because mandamus relief is not necessary to successfully challenge a statute's constitutionality, see TEX. CIV. PRAC. & REM. CODE §§ 37.004(a), .006(b), or to obtain a refund of unlawfully demanded franchise taxes, see TEX. TAX CODE §§ 112.052, .060. But accepting Allcat as our binding precedent, the Court's extension of Allcat to this case is even more creative and even less convincing. Mandamus is certainly not the only means to determine a boundary or to whom taxes are owed, and-unlike in Allcat -we cannot resolve Oxy's refund claim in this case. Conditionally granting Oxy's petition for writ of mandamus, the Court orders Nueces County to "withdraw and cease from issuing tax assessments to Oxy," ante at 165, but it does not direct Nueces County to refund any taxes because, as Oxy agrees, Oxy must return to the lower courts in which it has pursued "administrative and legal remedies" to calculate and obtain any refund. Ante at 153. Nevertheless, I need not decide whether section 72.010 impliedly grants us original jurisdiction to issue a writ of mandamus because even if it does, no "strong and special reason" justifies our original jurisdiction here.
II.
Article V, Section 3 (a)
Assuming that section 72.010 impliedly grants us original jurisdiction to issue a writ of mandamus, we must still determine whether that grant is constitutional. Because mandamus is an extraordinary remedy, and this Court's assertion of original jurisdiction over a request for such relief is even more extraordinary, we have consistently construed the Constitution to impose "certain limitations on the power of the Legislature to specify classes of cases which may be brought within the court's original jurisdiction." Love , 28 S.W.2d at 519. Specifically, we have long held that article V, section 3(a) authorizes the legislature *170to grant us original jurisdiction only for cases in which
(1) "the right to the duty required to be performed by mandamus [is not] 'dependent upon the determination of any doubtful question of fact,' "
(2) "the writ of quo warranto or mandamus [is] a proper or necessary process for enforcement of the right asserted," and
(3) "some strong and special reason" exists "for the exercise of this extraordinary original jurisdiction."
Id. (quoting Teat v. McGaughey , 85 Tex. 478, 22 S.W. 302, 303 (1893) (orig. proceeding), and citing Pickle v. McCall , 86 Tex. 212, 24 S.W. 265, 266 (1893) (orig. proceeding), and Betts v. Johnson , 96 Tex. 360, 73 S.W. 4, 5 (1903) (orig. proceeding) ).
I agree with the Court that section 72.010 does not require us to resolve any "doubtful question of fact" in this case. Id. ; see ante at 156-57.3 Whether mandamus relief is "proper or necessary" is a much closer call,4 but I need not decide that issue because no "strong and special reason"
*171justifies our "extraordinary original jurisdiction" in this case.
A "strong and special reason" for this Court to exercise original jurisdiction exists when a case "involves questions which are of general public interest and call for a speedy determination." Betts , 73 S.W. at 5. Even when the extraordinary remedy of mandamus relief is proper and necessary (that is, when the second constitutional requirement is satisfied), the relator must first pursue that relief "in the lower courts unless it is made plain that urgent necessity calls for the exercise of the original jurisdiction of the Supreme Court." Love , 28 S.W.2d at 521 (emphasis added). Absent such "urgent necessity," the relator must pursue its rights in the ordinary fashion: "a mandamus proceeding by suit in the district court, appealed to the Court of Civil Appeals, and brought to the Supreme Court" by petition for review. Id. "Where these ordinary remedies are complete and adequate, the extraordinary original jurisdiction of the Supreme Court ... cannot be successfully invoked." Id. (citations omitted).
In response to these quotes from Love , the Court notes that "Oxy is not a party to that action"-meaning the section 72.009 suit between the counties in Refugio County-"and cannot be," and "Oxy has no relief to pursue there [in the pending Refugio County suit] in an ordinary fashion or any other way." Ante at 159. This response strikingly reveals the Court's confusion and the reason for its error. The point we made clear in Love is this: Even if mandamus is a proper or necessary means to resolve Oxy's complaints, Oxy can and must file a petition seeking a writ of mandamus in an appropriate district court unless an "urgent necessity" creates a "strong a special reason" for it to seek that relief in this Court first . Love , 28 S.W.2d at 521. Even though Oxy is not a party to the counties' pending Refugio County suit, that suit affects whether Oxy can seek mandamus relief in this Court *172first because, as discussed below, the status of that suit-in particular, the imminent summary-judgment hearing to resolve the counties' dispute-negates any claim of the urgent necessity the Constitution requires for us to exercise original mandamus jurisdiction.
The Court asserts that the fact that Oxy is being "double-taxed" is "alone" a " 'strong and special reason' for extraordinary mandamus relief," ante at 159, but it does not divorce that assessment from its concerns about how long the counties' boundary litigation has been pending. The Constitution, at least as construed in Love to require an "urgent necessity," does not authorize the legislature to permit anyone who alleges they are being "double-taxed" to file an original mandamus action in this Court. Nor does the history or status of the Refugio County litigation create the "urgent necessity" the Constitution requires.
The Court is obviously bothered by how long the counties' boundary litigation has been pending. See ante at 151-52. But the Court's repeated references to the "counties' 46-year history of boundary litigation," ante at 151, which once remained "pending for 17 years," ante at 152, is a red herring. Contrary to the Court's assertion, Oxy has not "wait[ed] 46 years" for a remedy. Ante at 158. Although the counties have been engaged in litigation over their shared boundary since 1972, Oxy had no dispute until both counties began taxing the piers and related facilities in 2008. San Patricio County then promptly filed suit in Refugio County, seeking a determination of which county was properly taxing the piers. Ante at 151-52; see TEX. LOC. GOV'T CODE § 72.009 (authorizing counties to sue "an adjacent county to establish the common boundary line"). And to protect its rights, Oxy filed tax-protest suits against both counties under chapter 41 of the Tax Code, seeking a refund from whichever county loses the boundary dispute. Ante at 158; see TEX. TAX CODE § 41.41.
The delays in resolving the Refugio County suit have resulted primarily from an unsuccessful mandamus proceeding followed by a successful appeal from what turned out to be an improper venue transfer. See San Patricio Cty. , 492 S.W.3d at 478-82 (explaining litigation's history). The court of appeals resolved the venue issue in 2016, and we finally denied review of that decision on October 20, 2017. The Nueces County district court just entered an order transferring the case back to the Refugio County district court on April 11 of this year. On June 19, the counties jointly submitted a letter to the Refugio County district court proposing an expedited disposition on cross-motions for summary judgment, and the district court's hearing on those motions is now just twelve days away. Although the venue dispute may have created an unfortunate delay, no one contends that either county has acted in bad faith or pursued tactics intended primarily for delay. Instead, as Nueces County explains in its brief, both counties and the courts below have simply "followed proper trial and appellate procedure" to resolve their legitimate dispute.
More importantly, the questions of whether and why the counties' dispute regarding the piers and related facilities has lingered are mostly irrelevant to the issue of whether a "strong and special reason" existed for the legislature to authorize an original action in this Court. By the time the legislature enacted section 72.010 just last year, the court of appeals had remanded the counties' boundary litigation to Refugio County, and that decision was pending review in this Court. After we denied review, the case returned to the Refugio County district court that issued the 2003 judgment. As Nueces County asserts, no *173court is better suited to interpret and apply that judgment to resolve the present dispute than the court that drafted and entered it. With that hearing just days away, no "urgent necessity" provides a "strong and special reason" for "the exercise of the original jurisdiction of the Supreme Court." Love , 28 S.W.2d at 521.
The resolution of Oxy's dilemma necessarily depends on the counties' willingness to resolve their dispute. But nothing in this record suggests that either county has improperly delayed the Refugio County litigation or intends to delay it further, much less justifies the Court's suggestion that neither county "has shown a pressing interest in achieving a resolution."Ante at 158. To the contrary, within weeks after the courts (including this Court5 ) finally resolved the venue issue and returned the case to Refugio County, the counties jointly requested an expedited resolution on summary judgment. The imminent summary-judgment hearing should compel us to conclude that, if this Court is to ultimately resolve the dispositive issue, we will soon have that opportunity through the preferred and proper process-on a full record and after a "complete vetting of the parties' potential arguments in the lower courts." Pidgeon v. Turner , 538 S.W.3d 73, 87 (Tex. 2017) (quoting Hegar v. Tex. Small Tobacco Coal. , 496 S.W.3d 778, 792 (Tex. 2016) ).
I do not discount Oxy's (and similar property owners') likely frustration over litigation delays.6 But in assessing whether an urgent necessity establishes a strong and special reason to authorize original mandamus jurisdiction, the Court discounts the status of the Refugio County litigation when the legislature enacted section 72.010 and wholly ignores the summary-judgment hearing that is imminent as we issue our decision.
Finally, the Court concludes that the history of the counties' Refugio County litigation and its impact on Oxy "raises an issue 'of general public interest' that 'call[s] for a speedy determination.' " Ante at 158 (quoting Love , 28 S.W.2d at 519 ). But the "general public interest" that required a "speedy determination" in Love derived from the relator's right to have his name placed on the ballot as the Democratic Party's candidate for Governor in an imminent election, which we concluded affected "the general rights and the important interests of the state and of the people," and which would be lost completely and forever if we did not exercise original jurisdiction. Love , 28 S.W.2d at 521. Although we have since recognized such general public interests in issues involving taxation, we did so only in cases involving state taxes that affected all limited partnerships and certain other unincorporated associations in the state, Allcat , 356 S.W.3d at 458-59, or "not only millions of taxpayers but the public at large" and the "state fisc" itself, In re Nestle USA, Inc. , 387 S.W.3d 610, 617 (Tex. 2012) (orig. proceeding). By contrast, the issue in this case involves the fiscal interests of just one taxpayer7 and two of Texas's 254 counties.
*174However much we may desire to defer to the legislature's policy choice in enacting section 72.010, and however sympathetic we may be to Oxy's desire for a quicker resolution than the ordinary litigation process has provided, neither we nor the legislature can create jurisdiction the Constitution does not permit. Article V, section 3(a) permits the legislature to grant this Court original jurisdiction to issue writs of mandamus, but our precedent confirms that any such writ must be not only proper and necessary, but urgently necessary. "I would not sacrifice that principle on the altar of expediency," Nat'l Mut. Ins. Co. of D.C. v. Tidewater Transfer Co. , 337 U.S. 582, 645, 69 S.Ct. 1173, 93 L.Ed. 1556 (1949) (Vinson, C.J., dissenting), especially when, as here, the issue is already teed up in the district court and that court is scheduled to address it within days.