03/13/2017 City Council Agenda - Laserfiche WebLink

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Pavement Preservation Program (PPP) - This is the current capital project program to preserve Eugene s improved street system. A pnonty for this program is to preserve streets that have not "Vauiuti weuu rr. V3N .idr. .,. ,.„ yet degraded to a point where reconstruction is°` required. Preserving a street through overlay or similar treatment is four to five times more cost _ effective than waiting to repair a street until after 4Irk- it � gsw�IAYR .i puk¢°rt ��'A uvtlbx4nVh'P requires reconstruction. This program was initiated in 2003 and, until passage of the 2008 flow and 2012 street repair bonds, was predominately funded with local fuel tax revenue and the Pavement Life Cycle — City of Eugene Transportation Service Profile Presentation reimbursement fee component of transportation system development charges. Reclaimed Asphalt Pavement (RAP) - Reclaimed asphalt pavement is the grindings from the existing pavement during the inlay process described above. While reclaimed asphalt materials can be used as base rock and shoulder materials, the most common and effective use of this material is to supplement virgin materials used to make new asphalt pavement and reduce the use of costly asphalt binder. In Oregon, it is common to specify up to 30 percent of asphalt pavement can be made up of reclaimed asphalt pavement. Other reclaimed asphalt materials, such as shingles, can also be used to replace virgin asphalt binder in pavements. Paving on Spring Blvd Reconstruction — Once the street has deteriorated to the point that it can no longer be repaired with an inlay or overlay, it is repaired by reconstructing the pavement and underlying base. Traditional reconstruction involves digging up the existing pavement, any existing base rock, and subsurface soils to the depth that will accommodate a new pavement structure. As discussed above, in-place recycling may sometimes be used as an alternative to traditional reconstruction. Reconstruction is the most expensive of the repair options, which is why the City prioritizes preserving streets before they reach the point of needing reconstruction. Reconstruction may be four to five times more expensive than an inlay treatment. Warm Mix Asphalt - Warm mix asphalt pavement is identical to conventional hot mix asphalt pavement, except that through a special mixing process it is produced at a temperature approximately 50 to 100 degrees cooler than conventional hot mix asphalt. In Eugene, all asphalt concrete producers have retrofitted their plants to produce warm mix asphalt using a water - foaming process. The foaming process allows temperature reductions of approximately 50 degrees. This reduction in temperature has several advantages: