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Pavement Preservation Program (PPP) - This is the current capital project program to preserve <br />Eugene’s improved street system. A priority for <br />this program is to preserve streets that have not <br />yet degraded to a point where reconstruction is <br />required. Preserving a street through overlay or <br />similar treatment is four to five times more cost <br />effective than waiting to repair a street until after <br />it requires reconstruction. This program was <br />initiated in 2003 and, until passage of the 2008 <br />and 2012 street repair bonds, was predominately <br />Pavement Life Cycle – City of Eugene <br />funded with local fuel tax revenue and the <br />Transportation Service Profile Presentation <br />reimbursement fee component of transportation <br />system development charges. <br />Reclaimed Asphalt Pavement (RAP) - Reclaimed asphalt pavement is the grindings from the <br />existing pavement during the inlay process described above. The most common and effective <br />use of this material is to supplement virgin materials used to make new asphalt pavement and <br />reduce the use of costly asphalt binder. In Oregon, it is common to specify up to 30 percent of <br />asphalt pavement can be made up of reclaimed asphalt pavement. Other reclaimed asphalt <br />materials, such as shingles, can also be used to replace virgin asphalt binder in pavements. <br />Reclaimed asphalt materials can be used as base rock. In 2017 the method of reusing RAP on- <br />site as road base was used on several low volume residential streets. See below for more details. <br />Reconstruction – Once the street has <br />deteriorated to the point that it can no longer <br />be repaired with an inlay or overlay, it is <br />repaired by reconstructing the pavement <br />and underlying base. Traditional <br />reconstruction involves digging up the <br />existing pavement, any existing base rock, <br />and subsurface soils to the depth that will <br />accommodate a new pavement structure. <br />As discussed above, in-place recycling may <br />Placing Concrete Pavement – Jefferson St <br />sometimes be used as an alternative to <br />traditional reconstruction. Reconstruction is the most expensive of the repair options, which is <br />why the City prioritizes preserving streets before they reach the point of needing reconstruction. <br />Reconstruction may be four to five times more expensive than an inlay treatment. <br />Warm Mix Asphalt - Warm mix asphalt pavement is identical to conventional hot mix asphalt <br />pavement, except that through a special mixing process it is produced at a temperature <br />approximately 50 to 100 degrees cooler than conventional hot mix asphalt. In Eugene, all asphalt <br />concrete producers have retrofitted their plants to produce warm mix asphalt using a water- <br />foaming process. The foaming process allows temperature reductions of approximately 50 <br />degrees. This reduction in temperature has several advantages: <br />1.It reduces energy consumption to produce asphalt concrete, lowering costs and <br />greenhouse gas emissions. <br />2017 Report to the SRRP Page 2 <br /> <br />