CCP 01-31-1994 - Laserfiche WebLink

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I ~ The bituminous surface on Amble Drive is currently in very poor condition. The street is severely distressed with evidence of extensive patching and alligator cracking. Surface frost distortion is also present as outlined in the American Engineering Testing, Inc. (AEI) report which is enclosed as Appendix A. According to the City's Pavement Management Program, Amble Drive is rated 40 of a possible lOO points in the City's Pavement Management System I which qualifies it as one of the three streets most in need of rehabilitation in Arden Hills. The evidence of deteriorated pavement in the form of alligator cracking and potholes results I from a combination of repeated traffic loading, unstable base, poor subgrade drainage and less than optimal bituminous mix. The surface frost distortion is generally present as heaving or buckling of the pavement section during repeated freeze-thaw cycles. Evidence of I each of these types of distress is present throughout the length of Amble Drive, indicating major structural distress within the pavement section. I Storm water runoff currently drains toward intersections along the street. Catch basins and storm sewer piping are currently located at intersections along Amble Drive. It appears that the street grades are adequate to remove drainage from the roadway and the properties which I drain onto the street. City maintenance personnel have attempted to maintain the roadway in the past; however, continued patching will not counter the effects of the extensive deterioration at this point in the streets design life. I AET advanced four soil borings along the length of Amble Drive to evaluate both the II pavement cross section and subgrade conditions and suitability. The location of these borings are presented on Exhibit 2. The existing pavement section consists of a variable bituminous pavement thickness ranging from 2IA-inches to 7-inches; however, evidence of a base layer I was not present. The borings did indicate an oiled sand layer beneath the thin bituminous layer. The subgrade soils vary from sandy lean clay to mixed fill soils. The poorest conditions appear at the north end of Amble Drive and improve toward the south where the I subgrade soils are somewhat more stable. Subgrade drainage would aid in the removal of moisture found in some of the samples collected during the soil boring program. I BII"~rd Court Bussard Court extends approximately 660 feet from Old Snelling Avenue west to a cuI de sac. I The roadway is 32-feet in width and has existing surmountable concrete curb and gutter. The typical residential urban street section would be the appropriate method of reconstructing this street. Sewer and water utilities extend along the length of the street and utility repairs and I maintenance are not required according to public works staff; however, scheduled sewer televising may produce information that will indicate otherwise. The street is in a residential neighborhood, zoned R-I, single family residential. I The existing bituminous surface indicates distress similar to that evident along Amble Drive. The distress again consists of alligator cracking, potholes and frost distortion. The distress is I 5 {' I