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Feasibility Report TKDA Project No. 18196.000 <br />City of Arden Hills Page 7 <br /> <br />Curb and Gutter: The condition of the curb and gutter along <br />Arden Oaks is in acceptable condition with the exception of <br />a few areas of settling, large cracks, and drainage issues. In <br />general, the curb on Arden Oaks Drive appears to be <br />functional in a drainage perspective and aesthetically in <br />good condition. A large majority of the curb that was in <br />functional condition had vegetation growing in the expansion <br />joints. The vegetation traps sediment and other debris <br />causing water to spill out of the gutter onto the roadway. <br /> <br />An existing concrete apron is located on the south end of <br />Arden Oaks Drive but it has been overlaid with bituminous <br />pavement which is blocking water from traveling from west <br />to east. The buildup of material from various maintenance <br />operations has caused localized drainage issues. <br /> <br />Utilities: Storm sewer ranges in size from 12” to 18” of reinforced concrete pipe. All utilities in the <br />neighborhood were constructed with the original roadway around 1983. From field inspection, most <br />castings in the neighborhood appear to be acceptable in both function and aesthetic. It was noted <br />that some structures looked to be covered in debris and beginning to collect sediment in the gutters <br />around them. <br /> <br />Additionally, some of the curb and gutter around the <br />catch basins has begun to crack and sag causing <br />drainage issues and sedimentation. The drainage <br />issues could potentially lead to pavement damage <br />by allowing water into the pavement section. It was <br />noted that some of the catch basin rings are <br />beginning to deteriorate and break off into the <br />structures. Some sedimentation was noted in the <br />structures. <br /> <br />Watermain within the neighborhood consists of 6” ductile iron pipe which was installed in 1983. <br />The watermain functions well and is not proposed for improvement. Maintenance does not note <br />deficiencies in the watermain systems in this neighborhood. Valve casting adjustments would be <br />needed with street improvements. <br /> <br />Sanitary sewer pipe includes 8” PVC pipe which was also installed in 1983. The pipe and <br />structures are in good condition and do not require improvement. The rings and casting <br />adjustments would be completed with street improvements. <br /> <br />Drainage and Detention Ponds: Two stormwater detention ponds have been identified in the project <br />area. The first is located northeast of 1399 Arden Oaks Drive, and the second is located west of <br />1469 Arden Oaks Drive. These two ponds have collected some sediment and have partially lost <br />their full ability to treat storm water before discharging to natural bodies of water. At this time, it <br />does not appear a full cleanout would be necessary, but the ponds may benefit from cleanup around <br />the inlets and outlets. Further investigation and survey may be required to investigate and evaluate <br />the benefits and cost of the maintenance; these costs were not factored into the cost estimates in <br />this report. <br />Figure 3. Deteriorated Curb Arden <br />Oaks Drive <br />Figure 4. Failing Rings in Catch Basin Arden <br />Oaks Drive.