Agenda - Council - 02/10/2009 - Laserfiche WebLink

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CASE# ~ OVERVIEW OF 2009 STREET MAINTENANCE PROGRAM By: Steven Jankowski, City Engineer Background: The Street Maintenance Program is an annual program which has been irriplemented beginning in 1981 to address the preventative maintenance needs of the City's streets. Attached is a table and graph illustrating the scope of the recent years of the program. An idealized maintenance schedule that the City has pursued is as follows: . Apply a first sealcoat 5 years following the construction of a bituminous pavement. Developer escrows are collected to cover this cost. . Apply a second seal coat in Year 12 of the pavement. (Seven years after the first seal coat). . Apply a one and one half inch bituminous overlay in Year 19. (Seven years following the second sealcoat). The pavement generally requires additional strength by this time and sealcoating is no longer effective in keeping water from penetrating the pavement due to extensive cracking. ~ · Apply a seal onto the overlay in Year 24. (Five years following the bituminous overlay. Cracks will have reflected from the underlying pavement by this time and the seal will restore the imperviousness of the overlay in addition to improving the skid resistance of the pavement. Each year the street pavements are reviewed and rated on a scale from 1 to 1 0 using a Phaser rating system developed by the University of Wisconsin. The streets programmed for maintenance are selected based on a combination of the idealized schedule above and the rated conditions. It is also necessary to modify the program based upon the budget available. For these reasons the actual program will vary from the idealized schedule described above. In recent years the City completed overlaying a number of streets which were initially constructed between 1979 and 1983 when Ramsey experienced a "paving boom". Because funds were needed to address streets which badly needed overlays, some of the sealcoating projects were delayed. This year the City will be focusing on the sealcoating of streets which have recently been overlaid between 1997 and 2004. The 2009 program consists of seal projects on approximately 16.09 miles of City streets which are primarily located in the southern and eastern portions of the City. A breakdown of these seals is as follows: 1 st seals 2.86 miles; MSA seals 1.31 miles; and seals on overlaid streets 11.92 miles. An exhibit illustrating the proposed program will be available at the meeting. The streets proposed for sealcoating will be preceded by having cracks wider than one-quarter inch sealed with an elastic sealing material. In addition, the Public Works department will repair any failed areas prior to work being performed by the contractor. -175-