Conditions for construction projects may differ from the original contract documents due to changes in physical site conditions, contractor work requirements or alterations to the design. The LG is responsible for including the appropriate differing site condition language in the bid document and coordinating closely with the TxDOT district regarding changed conditions encountered during construction. The federal and state statutes specifying the requirements related to differing site conditions are described in of this Manual. The provides a brief description in Chapter 9 of the process used to comply with these requirements, with a more detailed description of the required practices in the Chapter 7.