The City of Seattle is responsible for keeping records drawings on file as defined by the RCW Chapter 19.122. These drawings are kept in SPU's record vault. Before issuance of a Street Right-of-Way Improvement Permit, a signed copy of the approved plan set is forwarded to the record vault. If any changes are made to the plan during construction, an as-built drawing is prepared and sent to the SPU record vault to be incorporated into the permanent plan set. The public has access to these plans for future improvements and for maintenance activities