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Feasibility Report TKDA Project No. 18196.000 City of Arden Hills Page 9 Due to the fact that some areas of the project are not recommended for a mill and overlay and some areas of the street may require bituminous removal and replacement after milling and prior to overlaying, it is recommended the entire project area be reclaimed and full depth pavement replacement be performed. This will provide the neighborhood with a uniform street section and longer lasting results. To make room for the new bituminous section, the reclaimed material will be graded and compacted to a depth of 5” below finish grade after reclamation and excess material removed. A leveling layer of 1” of class 5 will be added under a 4” bituminous pavement section placed over the new roadway base in two lifts across the width to provide a smooth new surface. A proposed typical section for Arden Oaks Drive and Arden Oaks Court is shown in Exhibit 3. Curb and Gutter: Existing curb and gutter will remain in place except for curb that is damaged, settled, or not draining properly. The existing curb will be inspected and marked for removal prior to construction. It is typical to see between 20% to 30% curb replacement for residential roadways of this age due to settlement or cracking. From examination of the curb in the field, it was found that approximately 30% +/- 5% of the curb would need to be replaced due to large cracks or settling causing drainage issues. For the purposes of this report and estimates, 30% was used for calculation of project costs and scope. One portion of curb, approximately 300 feet in length around the Arden Oaks Drive cul-de-sac extending down the south curb line approximately 100 feet, was noted during field inspection as being in poor condition. It is recommended the curb in that stretch be replaced in its entirety. In addition to the curb being replaced, it is recommended that drain tile be installed around the radius of the cul- de-sac to the catch basin located on the south side curb of the Snelling Avenue Arden Oaks intersection. A valley gutter is also recommended at the Arden Oaks Drive County Road E intersection to better facilitate drainage through the intersection. In addition to curb and gutter replacement, driveways impacted by replaced curb and gutter will be patched to the same, or better than, previous conditions. Turf disturbed as a part of the curb replacement process will be restored with 6” topsoil and residential grade seed. Utilities: It is recommended that all the manhole and catch basin rings be replaced as a part of the pavement rehabilitation project. It is typical to reset all manhole and catch basin grades to match the new grades of the roadway to improve drivability and drainage. In addition to the adjustment rings, outdated and damaged manhole and catch basin casting assemblies will be replaced with their modern castings. Storm sewer manholes and catch basins and sanitary manholes will be recast with new concrete rings. Sanitary sewer manholes will be recast with concrete rings and infiltration prevention products to limit inflow and infiltration into the sanitary system. Figure 6. 2020 Street Reclamation Project from White Bear Township Street Project Figure 7. Curb and Gutter from 2020 Mendota Heights Street Project DRAFT REPORT 7-8-2021