16.16.070   Floodplains—New delineations required when.
   A.   Any person or agency responsible for the construction of any improvement, public or private, which changes the configuration of the delineated floodplain, flow conditions, or base flood elevations, shall provide to the district, and all governing jurisdictions affected by the project, new delineations of floodplain conditions within one hundred twenty calendar days after completion of construction.
   B.   Where FEMA has adopted floodplain delineations, base flood elevations, floodways and other regulatory data as contained in the NFIP flood insurance study, the property owner or agency responsible for the construction of improvements that may modify the floodplain information or flow conditions shall provide to the district for review and approval:
      1.   A conditional letter of map revision (CLOMR) prior to construction unless waived by the chief engineer. The proposed floodplain delineations, or modifications to existing delineations, shall be in accordance with the criteria adopted by FEMA, the Director of ADWR and this title. The CLOMR shall contain all reports and documentation as required by the NFIP including:
         a.   A hydraulic analysis and proposed delineation of all regulatory floodplains and water surface elevations for the proposed improvement.
         b.   Improvement plans and specifications as necessary for construction.
         c.   For subdivisions, the CLOMR must be approved by the district and submitted to FEMA prior to recording of the final plat, or in the case of development plans, prior to approval.
      2.   A letter of map revision (LOMR) including all required documents and associated new technical data within one hundred twenty calendar days after construction is complete. The LOMR information shall contain all reports and documentation as required by the NFIP including:
         a.   A new delineation of all regulatory floodplains affected by the improvements.
         b.   As-built plans.
         c.   All documents, plans, and reports shall be prepared in conformance with the requirements of FEMA, the Director of ADWR, and this title.
         d.   For privately constructed improvements for subdivisions or development plans, the property owner shall provide to the district the LOMR documents, with as-built plans of the drainage improvements, and the LOMR must be approved by the district and submitted to FEMA prior to the release of assurances for subdivisions or the release of the certificate of occupancy for development plans.
      3.   All technical data, floodplain delineations, reports, maps, and documents shall be prepared in accordance with criteria establish by the Director of ADWR and in conformance with the requirements of the NFIP.
(Ord. 2010-FC5 § 1 (part), 2010; Ord. 2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part), 1999; Ord. 1988 FC-2 Art. 6 (A) (5), 1988)