30 Tex. Admin. Code § 299.11
All dams will be classified or reclassified as necessary to assure appropriate safety considerations. The three size classifications (small, intermediate, and large), based on height of dam or impoundment capacity, and the three hazard classifications (low, significant, and high), are combined to indicate a dam's downstream hazard potential. Thus, the classification assignment reflects the hazard potential associated with assumed failure of the dam. For example, dams located such that resulting failure could be catastrophic are classified so as to require a higher degree of design consideration than would be required for similar dams located in remote areas. Classification does not indicate the physical condition of a dam.
Source Note:The provisions of this §299.11 adopted to be effective May 13, 1986, 11 TexReg 1978.