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i L CC r.;; f: t ~, t....:. ,'I -r:r:.', f I f~ r i ~' J r , t ~\ , ~ [; , if ~'; i~ '. , storage and base flood elevation lie at the center of permit evaluations. Development acti vi ty occurring in the Review Zone will be subject to the review process but does not automatically require a CDC permit. Participants will have the option to extend the regulatory requirements beyond the Regulatory Zone into the Review Zone. NCTCOG will act as a repository for the information resulting from this process using its Regional Geographic Information System as a tracking system. The information will be use din the continuing modification and update of sophisticated computer hydrologic and hydraulic modeling being developed with engineering-scale l;,ase mapping data being developed in the Upper Trinity River Feasibility Study. cities are Implementing the CDC process by an amendment of their floodplain ordinances. A Corridor Development Certificate manual outlines the proposed permit application process and is being distributed to the development community at the local level by the participating cities. The CDC process will go into effect in the fall of 1992. As previously noted, the use of GIS technology is very important to the study partners. Increased utilization of GIS technology into fundamental study elements is being pursued. The hydrologic cover information in both vector and raster data forms to compute discharge values. Building outlines will be captured and will be used to attach coun'ty appraisal district valuations of structures in the economic evaluation process od damage determination and alternatives justification. Since the study began, we have documented specific computer methodologies that will be utilized during the Feasibility Study. This was accomplished by conducting a Prototype Methodology Study that was completed last year which explored methodology options and "debugged" technological and data integration problems. We are currently developing the actual floodplain and economic models that will be used in the study. As we proceed in this regard, we will continue to evaluate and document all methodologies being used. As this study procee,ds, we will continue to find new opportunities to utilize GIS technology that are very exciting but tremendously challenging. We ar,e presently developing a comprehensive set of GIS standards for this base mapping as well as standards for more traditional types of planning-scale base maps for use throughout the region.