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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 Engineering <br />Division for field testing to verify condition findings. <br />Surface operations staff maintain. more than 13001ane miles of city streets. Fully improved <br />asphalt streets receive the highest level of maintenance. Preventative maintenance designed to <br />extend the life of the transportation asset is of highest priority. Street maintenance for streets <br />identified on the PPP list will be similar to those streets with higher OCI ratings. These <br />streets will be swept on a regular schedule, receive skin patching when necessary, have <br />alligatored areas dug out and replaced, receive scheduled crack sealir~, and have base failures <br />repaired. These maintenance activities are performed to mitigate lraz~u~a~s conditions and to <br />extend the useful life of the street. The goal of preventative mai~nte ance is to prevent a <br />street's OCI from .slipping into a reconstruction category in ~~h i c h c' . ctive treatments can. <br />run 4 to 5 times the cost of overlay projects. <br />z ~ <br />PPP -Overview of Engineering's Role ~' <br />e <br />Engineering Division receives the grouped proj cts r preservation three years Wit. <br />Construction design and historical data are collected alia revi~;~~ed; and field inspections are <br />performed. Final determination of needed treatment result from core tests and <br />recommendations by pavement consultunts~~ Once a street is determined to be a true <br />reconstruct it is deferred until funding is identii°~ed and available, lemons for reconstruct <br />treatment include base failure, design standarci~ whichdid not ant' pate current capacity, and <br />poor initial design standards. ~ - <br />w <br />FUNDING COMP..a1~ISON ~~~'T~-I CURRE ~ GAS TAX <br />Utilizing th ~ S s~uli~~are, alysis f<~r a 1 year period beginning at the end of 2006 has <br />been com ted 6asc;d c ° the c t funding with a portion of the gas tax sun-setting in 2008. <br />The P 1S software eva the... ~tePioration of each segment based on the historic individual <br />OC atin~s. The softwar n projc~ct~ when to apply the necessary treatment at the proper <br />time. When ssible, the s m applies a less expensive treatment earlier in the degradation <br />curve. The c; 'shed ann funding level is applied to the treatment needs, and then the <br />.annual distribut ~ cif treat t types is developed. If the established budget does not allow <br />for all of the treatnlt ne to be met, a remainder value (in dollars) is reported. This value <br />is commonly called tl~e ``additional needs" budget. A graph. of the "additional needs" for the <br />current funding level has been provided as well as an optimum funding scenario at $16.5 <br />million. Additionally, a graph identifying a funding level necessary to prevent projects falling <br />into reconstruct and rehabilitating all projects currently in a reconstruct condition is included. <br />This scenario requires approximately $27 million. An inflation factor of 2% annually has <br />been applied to this forecast. The 2% value is based on historic cost values as tracked by a <br />published market study (ENR). <br />14 <br />