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31 Bridge Internet Management System Contracts System NBMD NBMD NBMD Collection Dataset Public Fleet Module Dataset Management NBMD Maintenance XML Host NBMD Crew Cards documents Web Site User Materials Management Existing New Figure 5. Path for maintenance data. NBMD Tables reporting period. Reporting periods can be a calendar year, a fiscal year, an inspection biennium, or other convenient There are 13 data tables in NBMD datasets. These are listed reporting period. NBMD anticipates that one bridge will have in Table 25. one maintenance event of a given work-type within one report- NBMD datasets are temporal. Each dataset contains com- ing period. One bridge may have more than one event, entail- plete data for bridges and maintenance work for a defined ing different work-types, within one reporting period. Table 25. NBMD data tables. NBMD Table Description Activity_Definition_Table Mapping of DOT actions to NBMD descriptors. Contact information for agency providing bridge maintenance, Contact_Table condition and inventory data. Element_Definition_Table Mapping of DOT bridge elements to NBMD descriptors. Element_Inspection_Table Element-level condition data adapted from Pontis' eleminsp table. Unit costs of maintenance actions generated by NBMD viewer Element_Unit_Cost_Table utility. List of NBI and element-level inspections before and after Inspection_Cross_Reference_Table maintenance events. NBI condition and appraisal ratings collected from Pontis' inspevnt Inspection_Event_Table table or from NBI files. Line counts for NBMD data tables. Generated by NBMD_Size NBMD_Size utility. Maintenance work activities, production (accomplishment), and Production_Table costs. Mapping of DOT equipment, labor, and material IDs to NBMD Resource_Definition_Table descriptors. Equipment, labor and material types, quantities, and costs for Resource_Table maintenance events. Route inventory data, mostly NBI fields, collected from Pontis' Roadway_Table roadway table or from NBI files. Bridge inventory data, mostly NBI fields, collected from Pontis' Structure_Table bridge table or from NBI files.