Appellants, City and County of Dallas Levae Improvement District and Dallas County Flood Control District, filed suit in trespass to try title against appellee Roy Carroll for possession of a tract of land lying within the old bed of the Trinity River near the corner of Industrial Boulevard and Corinth Street in the City of Dallas. They also sought a mandatory injunction to require appellee to remove encroachments and obstructions alleged to have been placed on the property by appel-lee. This appeal is from a judgment in favor of appellee that appellants take nothing by their suit.
Appellee has filed a motion that the appeal be dismissed because the appellant Flood Control District has not filed an appeal bond. The Flood Control District was created by the Acts of 1945, 49th Legislature, page 619, Chapter 355, Vernon’s Ann.Civ.St. following § 8197f, Section 1 of the Act provides that it shall be a governmental agency and body politic with the powers of government. Section 2 describes the powers, rights, privileges, and functions of the District. It is obviously a water control and improvement district and does not have to give bond on appeal. Art. 2276a, V.A.C.S. The motion to dismiss is overruled.
The Trinity River formerly flowed in a southerly direction in a channel which lay immediately west of the downtown section of the City of Dallas, hard by the county courthouse itself. Not ordinarily a large stream as rivers go, the Trinity had.a bad habit of bursting its bounds following heavy rains and flooding an area about a, mile wide lying between the business section of Dallas and the part of the city known as Oak Cliff.
It was to reclaim part of this bottom land by the construction of levees and other improvements that the Levee District was created in 1926. A plan of reclamation was prepared, adopted, approved, and filed, as required by statute. Then the course of the Trinity River was changed so that the river was made to flow between levees in a new straight channel one-half mile west of the old channel. To properly drain the reclaimed land, sluice gates and conduits were constructed and pumps were placed at suitable places so that surface drainage water could be pushed through the levees into the new floodway between the levees. And to aid further in the drainage of the reclaimed land the old river channel was set aside as a storage basin to hold excess drainage water, if and when water should accumulate outside the levees faster than it *309could ¡be pumped through into the new floodway. The main project was completed in 1931 but the maintenance of the levees and drainage facilities is a continuing responsibility.
About seven years prior to the date of the trial, appellee began renting privately owned property adjacent to the old river channel. After renting for about a year and a half, appellee moved over onto the adjoining land to the east, which land lies entirely within the old river channel, and therefore belongs to the State of Texas. It is the property in controversy here. Ap-pellee built a garage on the tract and has since occupied and used the premises for his automobile repair business. He does not claim title to the property, nor has he ever paid any rent for its use. He concedes that all of the property which he is occupying lies in the old channel .of the Trinity River. In 1950 he tried to buy it from the State of Texas, but was hot successful.
The trial court made the following findings of fact: Both appellants are municipal corporations created for the purpose of constructing and maintaining levees 'and other improvements to reclaim land subject to flood conditions of the Trinity River; the Levee District was organized under and by virtue of Chapter 26, Title 128, R.C.S. 1925, Vernon’s Ann.Civ.St. art. 7972; the Flood District under and by virtue of the Acts of the 49th Legislature, 1945, Chapter 355, page 619, its purpose being to control, store, preserve, and distribute flood waters within the boundaries of the Levee District. Appellants prepared, filed, and had approved by the State Board of Water Commissioners a reclamation plan which provides that the old river bed should be used for storage of surplus surface water; the property here involved is within the metes and bounds 'of the old river bed as described in the plan; it was not used for water storage for many years prior to defendant’s occupancy because it is naturally higher,, or has been filled in above high water mark; appellants do not claim title to the property other than the right to use it for storage purposes as provided in the reclamation plan; appellee entered upon the land about seven years ago, built improvements on it and used it without objections- from appellants until suit was filed.
Based on the above findings, the Court reached these conclusions of law: Appellants are not authorized to maintain trespass to try title since the only claim they assert is the right of possession as distinguished from the right of title; appellants’ right of possession had been abandoned by lack of use prior to defendant’s entry thereon; fee title to the property is not in appellants or either of them; under the principles of stale demand, estoppel in pais, or laches appellants are not entitled to recover the property.
We quote from Rule 783, R.C.P., pertaining to trespass to try title: “The petition shall state: * * * (c) The interest which the plaintiff claims in the premises, whether it be a fee simple or other estate * * * (d) That the plaintiff was in possession of the premises or entitled to such possession.” Under this Rule and the repealed statute on which it was based, Art. 7366, appellants were entitled to maintain •an action of trespass to try title though they claimed only a right of possession as distinguished from ownership of the fee title. Culpepper v. West, Tex.Civ.App., 110 S.W.2d 231, 135 Tex. 156, 140 S.W.2d 166. Appellants’ fourth point of appeal is sustained.
We think the trial court’s finding of abandonment is without support in the evidence, and is contrary to statutory law. We quote from'Art. 7467b, § 3, R.C.S.: “ * * * Wherever an approved plan of reclamation provides that a bed or channel of a river or stream shall be used for the transmission or storage of storm waters, such fact shall be conclusive evidence that such bed or channel has not been aban-doneel.” (Emphasis supplied.) The court found and the undisputed evidence shows that the approved plan of reclamation here involved provides that the old river bed shall be used for the storage of storm waters. We therefore hold that as a matter of law it has not been abandoned. Appellants’ fifth and sixth, points are sustained.
*310There is ample evidence in the record that parts of the old river channel have been filled in by persons unknown and have been used as a dump ground at times, but we find no evidence whatever to support the court’s finding that the' property herein sued for was not used for water storage because it “is naturally higher ground.” Appellants’ sevefith point is sustained.
We have read appellee’s pleadings several times, but we do not find in them a plea of estoppel. Neither do we find any evidence in the record to support estoppel had it been pled. Anyway, we think that as a matter of law under the undisputed facts presented in this case, the doctrines of es-toppel, stale demand, and laches are not available to appellee.
Both of the appellants are municipal corporations. In the maintenance and protection of the channel storage area they are acting in their governmental capacities, not in their private, or proprietary capacities. Art. 16, § 59a, Vernon’s Ann.St. Const, of Texas; Chicago R. I. & G. R. Co. v. Tarrant County Water Control, etc., 123 Tex. 432, 73 S.W.2d 55. That being true, the exercise of such governmental powers may not be -lost to them through estoppel unless they are shown to have benefitted by the transaction. City of San Angelo v. Deutsch, 126 Tex. 532, 91 S.W.2d 308; 30 Tex.Jur. 113, 114; 17 Tex.Jur. 128. In 19 Am.Jur. 820, it is said: “ * * * an estop-pel is not asserted if such will embarrass a municipality in its capacity as a governing body or operate to prevent it from exercising its police power. Neither a wrongful nor an unauthorized act of a municipal officer or agent estops the municipality. Moreover, error, mistake, or laches on the part of a municipal officer cannot be made the basis of an estoppel against the city if an estoppel will result in impeding the conduct of public affairs by the municipality.” See also Jackson v. Nacogdoches County, Tex.Civ.App., 188 S.W.2d 237.
The City and County of Dallas Levee Improvement District has been a party to several lawsuits in which its legal status has been the subject of judicial consideration. In the interest of time and space we shall not discuss the holdings, but shall merely cite the cases: Cox v. City and County of Dallas Levee Imp. Dist., Tex.Civ.App., 258 S.W.2d 851 (writ ref. n. r. e.); Ray v. State, Tex.Civ.App., 153 S.W.2d 660 (ref. w. m.) ; Sheppard v. City and County of Dallas Levee Dist, Tex.Civ.App., 112 S.W.2d 253.
In our opinion under the undisputed facts in this case appellants are entitled to judgment in their favor for possession of the land in question and for a mandatory injunction requiring appellee to remove whatever obstructions he may have placed on the premises. We therefore sustain appellants’ first, second, and third points.
The record discloses that a great part if not all of the dirt fill in the old river bed now occupied by appellee was placed there by other persons than appellee. Appellee constructed the garage building, and from time to time has moved automobiles, automobile parts, and a few other things onto the premises. The mandatory injunction should require him to remove only the buildings arid other property which belong to him or which he may have placed on the property himself, or which may have been placed there under his purported authority.
Judgment of the trial court is reversed, and judgment is rendered in favor of appellants for possession of the land involved herein, and for a mandatory injunction as. above indicated.