Extreme Event Limit States

Structures must remain stable for an Extreme Event II limit state that considers scour due to the check flood required by the TxDOT Hydraulic Design Manual. This limit state need not include ice loads, vehicle collision loads, and vessel collision loads simultaneously. See Section 8 of this Chapter for additional information regarding scour analysis.
See the TxDOT Bridge Design Manual-LRFD for structures requiring consideration of earthquake effects.