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CC_Minutes_2015_0413
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Roseville City Council
Document Type
Council Minutes
Meeting Date
4/13/2015
Meeting Type
Regular
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Regular City Council Meeting <br /> Monday, April 13, 2015 <br /> Page 20 <br /> from current assumptions as index levels reduce from 70 to 60 within the 2014 to <br /> 2034 timeframe. <br /> Mr. Culver advised that staff's recommendation, supported by the Public Works, <br /> Environment and Transportation Commission (PWETC) at their March 24, 2015 <br /> meeting, would be to suspend the current seal coat program, and shift the current <br /> allotted seal coat funds of$220,000 to the annual mill and overlay program to ac- <br /> celerate this corrective action, and starting in 2015. Mr. Culver noted that staff <br /> and the PWETC further recommended an annual review of that proposed suspen- <br /> sion to re-enact it if and when the issue seemed to be resolved. Mr. Culver admit- <br /> ted that staff remained unsure when the City would stop seeing the delamination <br /> distress; and clarified that typically staff remained a strong proponent of the ad- <br /> vantages of performing regular seal coat applications. Mr. Culver advised that it <br /> should be known within one to two years if the delamination was going to stop, <br /> but probably not before then. Mr. Culver noted that typically, the City got a long- <br /> er life from seal coating than for this current delamination issue. <br /> Councilmember McGehee asked if there were adequate records of the chemical <br /> composition of underlying pavement and sealcoat for each area of delamination <br /> on Roseville roads. <br /> Mr. Culver responded that those records were available through as builts for the <br /> roads regarding the mix used and type of seal coat oil used for Roseville as well <br /> as other communities experiencing the same problem. Mr. Culver advised that <br /> MnDOT had reviewed that data; however, he repeated the problem in attempting <br /> to duplicate the conditions in a lab setting to define what is causing the problem. <br /> Councilmember McGehee suggested staff and the PWETC examine the specific <br /> relationships on streets in Roseville to determine locally which mix was causing <br /> the issue in an effort to predict where the delamination may next occur versus <br /> guessing where best to do mill and overlays, basically the City's own research <br /> project. <br /> Mr. Culver advised that the problem was being observed on all City streets during <br /> the particular timeframe; and advised that mix designs since then have changed <br /> dramatically, allowing ongoing research and analysis on mix design and any de- <br /> lamination patterns affects. <br /> Before resuming sealcoating, Councilmember Willmus asked what information <br /> staff would look for that would satisfy them that the issue had been resolved. <br /> Mr. Culver advised that if pavements paved in a certain year were already found <br /> not to be demonstrating stress beyond years 16 and 17, and if the same experienc- <br /> es were found by consensus in other communities as comparisons were made with <br />
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