30 Tex. Admin. Code § 297.13
A temporary permit, as its name implies, is short-lived in nature and designed for purposes of a temporary nature. A temporary permit may not be granted for a period of time exceeding three years. This permit does not vest in the holder any permanent right to the use of state water and expires in accordance with its terms. (It is primarily designed for those persons who require state water for highway construction, oil or gas well drilling projects, evaluation of Phase I of an aquifer storage and retrieval project and other types of short duration projects.) Temporary permits may be issued for beneficial purposes to the extent that they do not interfere with or adversely affect prior appropriations or vested rights on a stream. The period of time to use water authorized by a temporary permit which was initially granted for a period of less than three years may be extended, but in no event shall the entire period exceed three years nor shall an extension of time seek a change of diversion rate, diversion point, or additional water.
Source Note:The provisions of this §297.13 adopted to be effective May 30, 1986, 11 TexReg 2330; amended to be effective June 28, 1996, 21 TexReg 5442.