11-08-2021 Council Packet - Laserfiche WebLink

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4 | P a g e Table II. Breakdown of pavement conditions in the City of Lino Lakes. PCI Category PCI Range Mileage Percent of Roadway Network by Area Adequate 70.01 – 100.00 68.3 68.1 Marginal 40.01 – 70.00 23.7 21.6 Problem 0 – 40.00 12.2 10.3 Appendix A includes map of all the pavement in the City with their PCI classification. The specific PCI rating for each pavement segment is included in Appendix B. For sections of pavement that fall into the Adequate category, corrective and preventative maintenance is recommended. Corrective maintenance includes crack sealing and patching. These types of maintenance should be conducted as soon as cracks or distresses surface to reduce the infiltration of water and incompressible materials through the cracks. These fixes are recommended on roads in the upper range of the Adequate category because those roads shouldn’t need any major repairs. Preventive maintenance includes surface treatment such as crack sealing, fog sealing, and rejuvenating. These maintenance activities should be performed while the pavement is still in good condition. As roads deteriorate, these cost-effective maintenance strategies become ineffective and more expensive fixes are required. With proper preventative maintenance techniques, the life of an average paved road increases from 20 years to 60 years. Each type of preventive maintenance serves its own function, and project selection depends on the type and severity of distresses observed in the road. Streets that fall into the lower range of the adequate category with PCI values in the low 70s usually need a more robust maintenance activity such as a mill and overlay to get the desired increase in life. A more detailed evaluation of each road is required to accurately determine the proper maintenance strategy. More extreme rehabilitation projects are needed to restore projects in the Marginal category. For pavements in the upper range of the category, mill and overlays are recommended. Roadways that fall into the lower range of the Marginal category usually require a more thorough rehabilitation. Pavement reclamation is usually needed to adequately repair road at this point. Prior to any mill and overlay or bituminous removal and replacement, pavement coring is strongly recommended to determine if the pavement base structure is in good enough condition to support the intended project. If there are issues in the base and subgrade layers, many pavement preservation methods are not feasible. Reconstruction is recommended to be performed on streets that fall into the problem category. Usually, roads in this condition have deteriorated beyond the point where any other maintenance activity is suitable. Again, pavement coring is recommended prior to any design work to determine the appropriate maintenance project. Reconstruction can also help to address subsurface issues such as drainage or increase in traffic capacity.