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ARDEN HILLS CITY COUNCIL—April 26, 2010 9 7.B. Adopt Resolution 2010-023: Awarding Bid for the 2010 Pavement Management Program (continued) Councilmember Grant asked if the contract was bid so that segments of the project could be removed without affecting the price of the bid or if the projects could be awarded separately. Ms. Diane Hankee, WSB & Associates, clarified the contract was bid so that segments could be removed without affecting the per unit price for the other segments. The project was not bid with a set price per segment but rather with set prices per product unit. The overall price of the project would need to be recalculated if a segment was removed from the scope. Mayor Pro-Tem Holmes asked Ms. Hankee if the ratings provided for Janet Court, Katie Lane and Valentine Crest Road were accurate ratings. Ms. Hankee clarified the pavement ratings had been supplied by the City and were accurate according to the City. Councilmember Holden asked what the difference was between the boring readings for A4 on Valentine Crest Road and A5 on Janet Court. Ms. Hankee stated the big difference was the amount of sub-grade found at the site. At the A4 boring site on Valentine Crest Road the sub-grade was 5" and at the A5 boring the sub-grade was 10" Councilmember Holden asked if a mill and overlay could be done on Valentine Crest Road. Ms. Hankee stated this could be done but in terms of the life of the road it would not increase the life. The last mill and overlay was done in 1991 on Valentine Crest Road. On City streets it is not typical to have multiple mill and overlays, especially without curb and gutters. Councilmember Holden asked if another mill and overlay would last another 20 years on this road since there was not much traffic on this road. Ms. Hankee stated the first mill and overlay is typically done in the first 20 years of the life of a road. With a mill and overlay you hope to get an additional 20 years of life from the road. This is based on the soils that are below the road or the sub-grade and the drainage. There are drainage problems on Valentine Crest Road currently and this leads to cracking. This makes it difficult to determine the life expectancy of the road. She also stated that adding another lift or layer with a mill and overlay may cause drainage problems in other areas. Councilmember Holden asked when Valentine Crest Road was constructed originally and how many homes were located on this road. Ms. Hankee clarified this road was constructed 47 years ago. Civil Engineer Giga stated there are twelve homes on this road.