TxDOT project engineers and contract managers should understand that compliance with the NFIP and coordination with the FPA does not relieve TxDOT of the requirements of civil law. The Texas Water Code section 11.086 prohibits diversion or impoundment which will harm another property. Roadway and bridge designers must pay attention to surrounding conditions of building placements, property access, and runoff patterns to assure that the project will not cause adverse impacts to adjacent properties. Every designer for TxDOT has an obligation not to put TxDOT in a position of liability due to their design. The need for documentation that supports and protects TxDOT from lawsuits or liability claims is the reason for the inclusion of the required hydrologic and hydraulic study details in the plan set as engineering documents on sealed sheets.