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O & M – Overview of Maintenance Roles <br />Maintenance Division staff from both the surface technical and operations teams are involved <br />in a variety of roles associated with the Pavement Preservation Program (PPP). Pavement <br />rating, budget and street life analysis, grouping projects, and preventative maintenance are all <br />components of a pavement management system that take place in the Maintenance Division. <br />Surface technical staff performs annual pavement rating of the City’s transportation system in <br />order to track current pavement conditions. Streets are placed on the PPP list when the <br />Overall Condition Index (OCI) indicates an overlay treatment is needed. With this <br />information, detailed analysis is performed to help identify current treatment needs and <br />forecast anticipated needs. Based on available funding, projects from the PPP list are grouped <br />for efficiency. Once approved by the Maintenance Director, this list is sent to the <br />Engineering Division for field testing to verify condition findings. <br />Surface operations staff maintain more than 1,343 lane miles of city streets this includes <br />concrete streets which are not included in the Pavement Preservation Program. Fully <br />improved asphalt streets receive the highest level of maintenance. Preventative maintenance <br />designed to extend the life of the transportation asset is of highest priority. Street <br />maintenance for streets identified on the PPP list will be similar to those streets with higher <br />OCI ratings. These streets will be swept on a regular schedule, receive skin patching when <br />necessary, have alligatored areas dug out and replaced, receive scheduled crack sealing, and <br />have base failures repaired. These maintenance activities are performed to mitigate hazardous <br />conditions and to extend the useful life of the street. The goal of preventative maintenance is <br />to prevent a street’s OCI from slipping into a reconstruction category in which corrective <br />treatments can run 4 to 5 times the cost of overlay projects. <br />PPP – Overview of Engineering’s Role <br />Engineering Division receives the grouped projects for preservation three years out. <br />Construction design and historical data are collected and reviewed, and field inspections are <br />performed. Final determination of needed treatment results from core tests and <br />recommendations by pavement consultants. Once a street is determined to be a true <br />reconstruct it is deferred until funding is identified and available. Reasons for reconstruct <br />treatment include base failure, design standards which did not anticipate current capacity, and <br />poor initial design standards. <br />16 <br />