01-22-07 Item 2B, Five Year CIP Update

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City of Arden Hills Budget Analysis Report May 04, 2006 Page 4 Pavement Management Pavement Benefit 100 Pel Afkr MainteWl.ce x ~ 80 c c o +' 60 '6 c o o PCl before Main1enance DeceyCurve Before Meintwllllce Aru ofMain1enance 8eoefit C 40 __m______ Q) E Q) > '" (L Decay Curve After Maintewmce o o 20 _m m -- --- -- --------__ ___. __ __.. __ ___ 5 10 15 20 25 Age Since Construction 30 35 Figure 2 The shaded area is the benefit provided by the maintenance being done at some point in time. Factors that influence the benefit are: . type of pavement (determines which decay curve to use); ~ age of pavement (affects t'le PCI increase); . type of maintenance proposed (affects the PCI increase); and . cost of the proposed maintenance (affects the cost/benefit ratio). In most cases, the maximum benefit or extension of pavement life may be provided by some combination of maintenance procedures as opposed to using one type of maintenance, since combining maintenance techniques often provides larger increases in the PCI. The benefit of performing each type of maintenance is then divided by the calculated cost to determine the cost/benefit ratio of each alternative. Note that there are limiting conditions that may prohibit a procedure from being selected such as lack of funding or minimal PCI increase for the selected maintenance procedure. Prjoritized Work Plan Maintenance and repair work can be prioritized in a number of ways. Pavements in the worst condition can be fixed first. Pavements in the best condition can be fixed first. An optimal prioritization method distributes funding between the preventive maintenance of "good" to "excellent" pavements; the rehabilitation of "fair" to "poor" pavements; and, the reconstruction of "very poor" or "failed" pavements. Pavement sections within the Arden Hills pavement network were prioritized for maintenance and repair according to an optimal prioritization plan.