Tex. Water Code § 54.518

In addition to all other rights and remedies provided by the laws of the state, in the event the district defaults in the payment of principal, interest, or redemption price on its bonds when due, or in the event it fails to make payments into any fund or funds created in the order or resolution authorizing the issuance of the bonds, or defaults in the observation or performance of any other covenants, conditions, or obligations set forth in the resolution or order authorizing the issuance of its bonds, the owners of any of the bonds shall be entitled to a writ of mandamus issued by a court of competent jurisdiction compelling and requiring the district and its officials to observe and perform the covenants, obligations, or conditions prescribed in the order or resolution authorizing the issuance of the district's bonds.