09-04-2003 Council Work Session - Laserfiche WebLink

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There are several problems associated with paveinerit ow-rlays. The first concern is that while these projects increase the pavement strength, the paventj^ni .' tiength is still substandard and the heavy construction traffic damages these streets. Another concern is the number of existing cracks that appear in the new overlay. These reflective cracks then allow for water infiltration into the pavement resulting in freeze thaw damage. The expected life of these pavement overlays is variable depending on the condition of the existing street and the amount of construction traffic. The expected life of these overlays can range from 10 to 20 years. On some busy roads in areas with a lot of construction traffic, such as Casco Point Road, these pavement overlays may last less than 10 years. Casco Point Road is one of our more problematic roads because of the large amount of lakeshore redevelopment construction traffic. This is also a high traffic road. Complete reconstruction may be inevitable for this road. There are several lakeshore roads, such as Rest Point Road, in the Saga Hill area with steep grades and erosion problems that may warrant reconstruction with curb and gutter and storm sewer. These streets are also not eligible for State Aid funding and cannot ever be put on the State Aid system because they are dead end roads. Many of the other strcet.s in the Navarre and Saga Hill areas have lower traffic volumes, are dead end streets and have less redevelopment traffic. Complete reconstruction of these streets may not be necessary and less expensive rehabilitation 'options may be appropriate. In the lower density area of northern Orono, most of the main roads are on the State Aid system, so there is funding available for these roads. However state aid funds may not be appropriate for Fox Street because of the number of wetlands and trees that would be impacted to widen this road to state aid standards. Orono Orchard Road is one of the main roads in the City that is not eligible for state aid funding because it does not connect to a County Road or State Aid Road on the northern end. Long Lake has less than 5,000 people, so it is not eligible to receive for state aid funds. This road is in poor shape and needs to be repaired and a simple pavement overlay is not appropriate for this road. This road should probably not be repaired until after the new Highway 12 project is completed. During the new highway project construction, the normal traffic flow will be disnipted and additional road work in the area not a good idea. Options for Street Rehabilitation There are several options available for the rehabilitation of streets ranging from a pavement overlay to complete reconstruction. For cost estimating purposes a 20 ’ street width will be used. Orono City streets range from approximately 12 to 28 feet in width for vost esti..;aimg purposes assume a 20' street width. Below is a tabulation of cost per mile of street for various options with advantages (+) and disadvantages (—) Pavement Overlay $7S,000/mile +Increased pavement strength -Raises road elevation possible drainage concerns. Existing cracks appear in omlay