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that the methodology developed for this pavement condition index software used <br /> nation-wide data, with adjustments to the Roseville deterioration curves made <br /> over time based on our data sets. Mr. Schwartz advised that this program had <br /> been used by the City since the 1980's, and the local data suggest that the city's <br /> pavement life averages better than nationwide data. <br /> Specific to the surface deterioration dilemma, Chair Vanderwall questioned how <br /> confident staff was that the current projects were not experiencing the same issues <br /> and problems with materials and premature deterioration of pavement conditions. <br /> Mr. Schwartz advised that the information was not available, but staff was <br /> considering designating some control areas to determine how they perform, up to <br /> the time they would typically be scheduled for mill and overlay. <br /> Member DeBenedet spoke in support of those control areas, opining that he had <br /> often wondered if the time and expense of sealcoating had a significant enough <br /> payback to continue. Member DeBenedet noted that many cities had ceased that <br /> practice; and questioned if there was a broader issue, whether only materials or <br /> mix design issues with MnDOT. <br /> Mr. Schwartz advised that some studies are currently underway to determine if <br /> there were actually construction issues, problems with mix materials, or their <br /> application. <br /> Chair Vanderwall spoke in support of investigating the process applied and area <br /> covered by independent parties that weren't trying to defend their particular <br /> positions. <br /> At the request of Member DeBenedet, Mr. Schwartz reviewed how and when staff <br /> was available to provide on-site inspections for mill and overlay projects; <br /> typically with the inspector on-site when the mixture is applied, especially as <br /> required for all MSA streets, with additional core and temperature testing <br /> performed as indicated. <br /> Chair Vanderwall alerted Mr. Schwartz to an apparent core hole at County Road <br /> C and Western that needed filling. <br /> Member Stenlund observed that for those roadways at a PCI rating of 77 or <br /> higher, and that the trend of the displayed graph indicated that the City was close <br /> to the intercept slope, with the backlog larger than desired. <br /> Mr. Schwartz noted that staff was observing more common distresses in <br /> pavement, some due to age, for the majority of those streets constructed in the late <br /> 1980's and 1990's; creating the concerns in materials applied and/or construction <br /> processes used. <br /> Page 6 of 12 <br />