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IMS Infrastructure Management Services Arden Hills Report P a g e | 17 <br /> <br />Very Good (PCI = 70 to 85) – Surface Treatments and Localized Rehabilitation <br /> <br />Ridgewood Road from City Limit to Glenhill Road (GISID 1466, PCI = 82) – Rated as Very Good, this <br />road displays minor amounts of transverse cracking. The surface is non-weathered, and the base is still <br />strong. This street is an example of a candidate for preventative maintenance and light weight surface <br />treatments to extend the life of a roadway. <br />Asphalt streets rated as Very Good generally need lightweight surface -based treatments such as surface <br />seals, slurries, chip seals or microsurfacing. Routine maintenance such as crack sealing and localized <br />repairs often precede surface treatments. The conc ept is to keep the cracks as waterproof as possible <br />through crack sealing and the application of a surface treatment. By keeping water out of the base layers, <br />the pavement life is extended without the need for thicker rehabilitations such as overlays or re construction. <br />Surface treatments can increase surface friction and visual appearance of the pavement surface but do not <br />add structure or increase smoothness. <br />Surface treatments may include: <br />• Double or single application of slurry seals (slurries are a sand and asphalt cement mix). <br />• Microsurfacing – asphalt cement and up to 3/8 sand aggregate. <br />• Chip seals and cape seals (Chip seal followed by a slurry). <br />Additional cost benefits of early intervention include: <br />• Less use of non-renewable resources through thinner rehabilitation strategies. <br />• Less intrusive rehabilitation and easier to maintain access during construction. <br />• Easier to maintain existing drainage patterns.