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WSB Pavement Management Report Page 19 IV. PAVEMENT MANAGEMENT REPORT This pavement management report includes a systematic method of inspecting and rating the pavement condition of roads in a network, followed by performing a cost-effective analysis of various maintenance and rehabilitation strategies, which assists decision makers in making the best decision on the use of available resources. It is also used to supply updated information regarding the current management plan. SPECIAL MAINTENANCE ACTIONS RECOMMENDED Lino Lakes has many options available for pavement preventative maintenance, preservation, and reconstruction including reclamation, mill and overlays, and Texas underseal to extend the life of a roadway. These maintenance actions are anticipated to last several years and be cost effective. PREVENTATIVE MAINTENANCE Preventative maintenance can be defined as a treatment to an existing road that will help preserve and protect the road, while also slow future deterioration. This type of maintenance will improve the condition of the system without increasing its structural capacity. Implementing a preventative maintenance strategy is both cost effective and appropriate since maintenance costs increase with pavement age. Preventative maintenance actions can be completed at a much lower cost than preservation actions such as mill and overlays. By applying the appropriate preventative maintenance strategy at the right time, it can keep the good roads in good condition at a lower cost, which is a better strategy than waiting for the road to deteriorate before applying an improvement. With preventative maintenance techniques, you can extend the life of a pavement from 20 years to close to 50 years if the maintenance is done at the correct time. Preventative maintenance is best performed on newer pavements prior to the appearance of significant and/or severe distresses. Types of preventative maintenance include crack sealing, fog sealing, chip sealing, micro surfacing. Crack Seal Crack sealing is a type of preventative maintenance done to prevent the intrusion of water and incompressible materials into cracks. When water enters the cracks, it can soften the sub -base and base layers and lead to further cracking and the development of more severe alligator cracking and subsequently the formation of potholes. In Minnesota where freeze/thaw cycles exist, the water that enters the system through cracks can lead to frost heaving issue. Crack sealing should be completed as preventative maintenance early in the life of a new pavement or overlay, typically in 2 to 4 years, and roughly every 7 years or as determined to be necessary. This technique will not improve the structural capacity of the pavement but will slow down future structural deterioration that could be caused when water enters the system. It is recommended that crack sealing is done prior to either fog sealing or chip sealing.