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Unimproved Street System <br />ransportation system consists of 555 centerline miles of improved and unimproved <br />streets. The unimproved portion of this total includes 53 centerline miles (91 lane miles) of <br />asphalt and bituminous surface streets. The intent of this section is to describe the overall <br />condition of unimproved asphalt streets, highlight potential treatment needs, display associated <br />rehabilitation costs, and indicate the projected backlog repair cost for addressing the street <br />classification. It is important to note that any treatment short of being brought up to full urban <br />street standards should be considered temporary. The estimated cost to improve this <br />classification to meet the urban street standards is approximately $60 million. In addition, the <br />following backlog figure is separate from the improved street backlog figure. <br />Based on 2018 rating data of the unimproved street system,there is a backlog of temporary <br />repair projects, totaling an estimated $3.2million, up from $3.10million reported in 2017.The <br />following charts and graphs indicate that 70percent of the system falls into a no treatment <br />category, up from 68percent reported in 2017.Approximately 124unimproved streets have <br />benefited from full or partial treatment since 2008, though eleven percent of the system falls into <br />tospend $375,000annually to address a <br />portion of these streets when funding allows. <br />2018 Unimproved Asphalt Street <br /> Condition and Rehabilitation Report <br />(2018 Rating Data) <br />Rehabilitation <br />PCILane Miles% of SystemConditionUnit Cost/SQFT *Treatment ** <br />Cost <br />0-100.30.3%Poor$63,490$3.50FDR <br />11-203.53.9%Poor$610,913$2.75FDR or 2"AC <br />21-306.57.3%Poor$724,600$1.751.5"-2" AC <br />31-406.57.3%Fair$720,237$1.751.5"-2" AC <br />41-505.25.9%Fair$580,263$1.751.5"-2" AC <br />51-601.71.9%Fair$184,396$1.751.5"-2" AC <br />61-652.83.2%Fair$314,496$1.751.5"-2" AC <br />66-703.03.4%Good$0$0.00No Treatment <br />71-805.46.1%Good$0$0.00No Treatment <br />81-858.69.7%Good$0$0.00No Treatment <br />86-9011.112.5%Excellent$0$0.00No Treatment <br />91-10038.7%Excellent$0$0.00No Treatment <br />34.5 <br />Total <br />$3,198,395 <br /> <br />** Example <br />Rehabilitation <br />* Unit cost based <br />treatments. Actual <br />89.2100.00% <br />on recent project <br />treatment would <br />costs <br />need further analysis. <br />Table 4 Unimproved Asphalt Street Condition and Rehabilitation <br />21 <br />May 29, 2019, Work Session - Item B <br /> <br />