Tex. Transp. Code § 441.177
A holder of a district bond is entitled, in addition to any other right or remedy provided by state law, to a writ of mandamus requiring the district and its officials to perform any obligation that:
(2) the district fails to perform, including:
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.