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R-5 <br /> <br />that indicate a breakdown of the underlying subgrade; specifically alligator <br />cracking and areas that have been heavily patched additional subgrade work will <br />be required. <br /> <br />Due to varying depths of pavement and aggregate base, the project area has been <br />divided into two sections for the purpose of evaluation: <br />• Section 1: Turnham Road to Kintyre Lane/High Lane <br />• Section 2: Kintyre Lane/High Lane to (500-feet east of Willow Drive) <br />The proposed improvements for both sections include a full depth pavement <br />reclamation with spot replacement of underlying subgrade. A pavement section is <br />proposed for the both sections that includes compaction of the in-place reclaimed <br />material in lieu of aggregate base, and a bituminous asphalt section above that. <br />Based on the underlying soil strengths and the depths of the existing pavement to <br />be reclaimed, the AET geotechnical evaluation proposed Section 1 to be <br />rehabilitated with a 3-inch bituminous section, and Section 2 is proposed to be <br />rehabilitated with a 3.5-inch bituminous section. However, based on past <br />experience, it is recommended that a minimum of 4-inches of bituminous <br />pavement be used. Figure 2 depicts the proposed pavement sections. <br /> <br />In the areas where the significant distresses have been observed an additional <br />excavation and replacement of 1-foot of material below the depth of the reclaim is <br />proposed. To remain compliant with state aid rules, a project may replace a <br />maximum of 20-percent of the underlying subgrade to retain designation as a <br />maintenance activity. In the areas where additional excavation is to occur, the <br />pavement section will also incorporate geotextile fabric, to protect the <br />replacement material from migrating into underlying poor soils. <br /> <br />Figure No 3 shows the storm sewer and culvert crossings that are proposed to be <br />replaced. <br /> <br />It is our understanding that the City of Long Lake is also considering <br />improvements to the Watertown Road within its City limits. There is a portion of <br />Watertown Road that is shared between the cities of Long Lake and Orono. <br />Therefore, it is anticipated that Orono will need to participate in the cost of <br />improving that section of roadway. Based on discussions, with officials from <br />Long Lake, it is our understanding that they are considering assessments to the <br />benefiting properties in Long Lake to help finance the project. With that in mind,