OPINION
Relator, Burlington Northern and Santa Fe Railway Company (“Burlington”), seeks a writ of mandamus directing the Fort Bend County Court at Law No. 3 to vacate its injunction order in the underlying condemnation proceeding. Burlington contends the order is void for failure to *894 comply with Texas Rule of Civil Procedure 688 and for lack of subject matter jurisdiction. Because we disagree with .Burlington on both points, we deny mandamus relief.
I. BACKGROUND
Burlington was the owner of a railway easement in Fort Bend County, Texas. The real party in interest, Fort Bend County (“the County”), initiated condemnation proceedings in the county court to acquire the easement for construction of a railroad crossing into an adjacent housing development. Burlington filed a motion to dismiss claiming the County had no authority to condemn the property under the prior public use doctrine. 1 The county court denied Burlington’s motion and appointed special commissioners, who subsequently awarded Burlington $3,099.00 for the value of its easement. After the County deposited the funds into the registry of the court, and after the court accepted the special commissioners’ award, Burlington objected to the award on grounds that the compensation was “grossly inadequate” and that the County lacked authority to condemn the property.
While the condemnation proceeding was pending, the County filed an application for injunction to require Burlington “to improve the roadbed within twenty feet of its tracks to an acceptable level” so that the County could complete construction of the railroad crossing. In response, Burlington filed a plea to the jurisdiction requesting a transfer of the injunction proceeding to the district court based on its claim that the amount in controversy exceeded the jurisdictional limits of the county court. At the injunction hearing, the county court denied Burlington’s plea to the jurisdiction and granted the County’s request for in-junctive relief. That same day, the court signed an injunction order commanding Burlington to improve the roadbed.
Burlington subsequently filed this petition for writ of mandamus. 2 Burlington also filed a motion for temporary relief requesting that we enter orders staying the injunction order and restraining the Fort Bend County Clerk from issuing the writ. On the same day that we requested a response to the petition, the county clerk served Burlington with the writ of injunction. We subsequently granted Burlington’s amended motion for temporary relief and stayed the injunction order pending consideration of its petition.
II. LEGAL DISCUSSION
Generally, mandamus relief is available if the trial court violates a duty imposed by law or clearly abuses its discretion, either in resolving factual issues or in determining legal issues, when there is no adequate remedy at law.
See Walker v. Packer,
Burlington complains that the injunction order is void in two respects: (1) it did not comply with Texas Rule of Civil Procedure 683; and (2) the court lacked subject matter jurisdiction. As we explain below, the injunction order is not void. First, failure to comply with Rule 688 makes it merely voidable. Second, the court had subject matter jurisdiction over the eminent domain proceedings and issued ancillary in-junctive relief to enforce that jurisdiction.
A. Rule 683 Complaint
An injunction order that does not comply with Rule 683
“is subject to being declared void and dissolved.” InterFirst Bank San Felipe N.A. v. Paz Construction Co.,
B. Jurisdictional Complaint
Burlington also complains that the county court had no authority to grant the injunction because it lacked jurisdiction over the subject matter. As we noted, an order is void when a court has no power or jurisdiction to render it.
See Urbish v. 127th Judicial District Court,
We agree with the County that the court did have jurisdiction. We explain below, first discussing why the court had jurisdiction, and then addressing Burlington’s claims that the court could not issue the writ in spite of its eminent domain jurisdiction.
1. Jurisdiction of the County Court.
First, as noted, the court had jurisdiction to hear this type of case. Section *896 21.001 of the Texas Property Code provides that “district courts and county courts at law have concurrent jurisdiction in eminent domain cases.” TEX. PROP. CODE ANN. § 21.001(Vernon 1984). Section 25.0812 of the Government Code provides that a county court at law in Fort Bend County “is primarily responsible for and shall give preference to eminent domain proceedings and cases.” TEX. GOVT. CODE ANN. § 25.0812(b)(2) (Vernon Supp.2000).
Second, under the State Constitution and by statute, the court had authority to issue the injunction. Article 5, section 16 of the Texas Constitution states that “... county court judges shall have the power to issue writs necessary to enforce their jurisdiction.” TEX. CONST. Art. 5, § 16. Section 25.0004 of the Texas Government Code states that “a statutory county court or its judge may issue writs of injunction ... and all writs necessary for the enforcement of the jurisdiction of the court.” TEX. GOV’T CODE ANN. § 25.0004 (Vernon 1988). 4 Section 65.021 of the Texas Civil Practice and Remedies Code also states that a county court “shall hear and determine applications for writs of injunction.” TEX. CIV. PRAC. & REM. CODE ANN. § 65.021(a) (Vernon 1997).
Much has been written on article 5, section 16 with respect to the jurisdiction of county courts to issue injunctions.- There are two lines of case — both cited by the parties — which, at first reading, appear to conflict with each other. However, as we explain below with the aid to two old cases, they are not in conflict.
The first line of cases, which begins in the nineteenth century, uses rather broad language in holding that “the power of the county court to issue writs of [injunction] under [article 5, section 16] of the constitution ... [is] limited to cases exceeding $200 and not exceeding $1,000.”
See Ex Parte Bryant,
Each of these cases, however, involved a procedural posture absent from the underlying case: an original petition for injunction that: (1) did not contain a monetary allegation, and/or (2) involve a
*897
controversy that was not within a county court’s subject matter jurisdiction. In short, the injunctions were not being requested as auxiliary, or ancillary relief, but as the main, initial relief. Specifically, in
Dean,
the petition prayed that the county court “issue an extraordinary writ to try title to an elective office.”
In contrast, in the second line of cases, the courts have generally held that “once [a county court’s] jurisdiction is invoked ..., [it] has jurisdiction to the exclusion of all other courts of the subject matter of the litigation and can enforce such jurisdiction, if necessary, by ancillary injunctive process.”
See Repka v. American Nat. Ins. Co.,
In addition to these eases, we have found two other old cases clearly pointing out that the county court’s jurisdiction to issue writs of injunction depends upon its jurisdiction over the controversy, whether that jurisdiction is by subject matter or
*898
amount in controversy.
See County of Anderson v. Kennedy,
[We] are unable to find any authority warranting the court in granting this injunction because of any of the matters and charges contained in the foregoing petition, this being an original proceeding for injunction not ancillary to any suit pending in said court, with no ascertainable amount in controversy, and not relating to any subject-matter over which jurisdiction is by law conferred upon the county court ....
See Young,
In summary, the conclusion to be reached from these cases is that when a county court already has jurisdiction over a controversy, either by the subject matter or amount in controversy, it has exclusive power to dispose of the controversy; this power includes the issuance of injunctions that are related to the controversy.
See id; see also City of Garland v. Mayhew,
Here, it is undisputed that Burlington properly invoked the jurisdiction of the county court when it filed its objections to the special commissioners’ award. Once the county court’s jurisdiction was invoked, it had exclusive authority to grant auxiliary or ancillary injunctive relief in aid of its jurisdiction.
See City of Beaumont,
2. Burlington’s Claims that the Court Could Not Issue the Injunction.
Burlington raises several reasons why it believes the county court is without power to issue the injunction. First, because the injunction requires Burlington to improve the roadbed, Burlington argues the injunction is unrelated to taking of the property and thus, “is not essential to the preservation of [the county court’s] jurisdiction.” We disagree. The County asserted its right to actual possession for the purpose of constructing the
*899
railroad crossing.
See
TEX. PROP. CODE ANN. § 21.021(a) (Vernon 1984);
see also Hooks v. Fourth Court of Appeals,
Second, Burlington argues that the injunction order is void because the County failed to plead an amount in controversy within the county court’s jurisdictional limits. We have already responded to this argument, noting that this rule applies to an original petition for injunction in a controversy over which the court does not have specific subject matter jurisdiction. The only additional comment we make here is to point out that the reason a litigant must allege an amount in controversy is to initially confer jurisdiction on the county court — a county court’s jurisdiction over general matters of civil law is limited to matters involving an amount in controversy between $500 and $100,000. See TEX. GOV’T CODE ANN. § 25.0003(c) (Vernon Supp.2000).
8
However, this case does not involve a general civil matter as contemplated by the Government Code. See
id.
Instead, this case involves a very specific type of case — an eminent domain case. The Legislature has expressly conferred jurisdiction on the Fort Bend County Court at Law to hear eminent domain cases.
See
TEX. PROP. CODE ANN. § 21.001;
see also
TEX. GOV’T CODE ANN. § 25.0812(b)(2). Because the county court already had jurisdiction over the subject matter, the County was not required to allege an amount in controversy in order to obtain injunctive relief.
See Higginbotham,
Third, pointing to evidence at the injunction hearing that the cost to improve the roadbed exceeds the jurisdictional limits of the county court, Burlington argues that the County is impermissibly attempting to enlarge the county court’s jurisdiction under section 21.001 of the Property Code by seeking injunctive relief. This argument disregards the county court’s jurisdiction over eminent domain matters and the rule that once the court has jurisdiction in a condemnation proceeding, it has full power to dispose of the issues in the case.
See City Beaumont,
Lastly, Burlington argues the county court violated a duty to transfer the injunction proceeding to the district court under section 21.002 of the Property Code based on the County’s failure to plead an amount in controversy within the county court’s jurisdictional limits. As we discussed, there was no need for the County to plead an amount in controversy because the county court issued an injunction to enforce its existing jurisdiction in the condemnation action. Furthermore, section 21.002 is a discretionary, not a mandatory, statute that requires the county court at law to transfer “an issue of title or any other matter” to the district court, if the county court determines that it cannot “fully adjudicate” the matter. TEX. PROP. CODE ANN. § 21.002. Because the county court properly exercised its jurisdiction over the condemnation proceeding, the district court had no authority to interfere with that proceeding and the county court therefore did not violate section 21.002.
See City of Garland,
Having concluded that the injunction order is appealable pursuant to a Rule 683 complaint and that the order is not void for lack of subject matter jurisdiction, we deny Burlington’s petition for writ of mandamus and lift the stay previously granted by this Court.
Notes
. An authority seeking to condemn property already devoted to public use may not do so if the effect would be practically to destroy its existing use unless it shows that its intended use is of paramount public importance and that its purpose cannot be otherwise accomplished.
See Sabine & E. Tex. Ry. Co. v. Gulf & I. Ry. Co.,
. Although Burlington’s petition is styled as a "petition for writ of mandamus and or writ of prohibition,” we view it solely as a request for mandamus relief.
See Holloway v. Fifth Court of Appeals,
. If the court’s injunction is temporary, Burlington’s remedy is by an interlocutory appeal.
See
TEX. CIV. PRAC. & REM. CODE ANN. § 51.014(a)(4) (Vernon Supp.1999). If the injunction is permanent, Burlington’s remedy is by a severance and appeal.
See Brelsford v. Old Bridge Lake Community Service Corp.,
. The Fort Bend County Court at Law is a statutory county court. See TEX. GOV’T CODE ANN. § 25.0811(3) (Vernon Supp. 2000).
. The Texas Supreme Court held that the county court did not have jurisdiction to try this type of case and that only the district court had jurisdiction.
See
. County courts have always had two types of jurisdiction — monetary and subject matter.
See e.g. County of Anderson v. Kennedy,
. .Although
County of Anderson
involved the Constitution of 1875, and
Young
involved the Constitution of 1891, the language pertinent to the county courts' authority to issue injunctions has remained the same since the 1875 Constitution.
See County of Anderson,
. For example, in another case cited by Burlington, the court could not hear the matter because it was not within the court’s monetary limits.
See Nix v. Nix,
