Agenda - Public Works Committee - 01/20/2009

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CASE# ~ OY~:H.VIEW OF 2009 STREET MAINTENANCE PROGRAM By: Steven ~Jnnl<owsld, City Engineer Background: The Street Maintenance Program is an anmml program vvhich has been implemented beginning in 1981to address the prcvent~ltive maintcmmce needs of the City I 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 tirst sealcoat 5 years following the construction of a bituminous pavement. Developer escrows are collected to cover this cost. . Apply ~l second seal coat in Year 12 of the pavemcnt.{Sevcn years after the tLrst seal coat). " . Apply a one and one half inch bituminous overlay in Year 19. (Seven years following the second sea1cout). The pavement gcnemlly requires additiomll strength by this time and sea1coating is n\) longer effective in keeping water ti'om penetrating the pavement due to extensive cracking. . Apply a se~ll onto the over1~lyil1 Yeal' 24. (Five years follo'vving the bituminous overl,\)', Cracks will have reflected ti'OI11 the underlying ptlVCmcnt 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 reviewcc! and rated on a scalc" from 1 to lOusing a I 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. [t 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 ovedays, some of the sealcouting projects were deJayed. This year the City will be focusing 011 the seulcoating of streets which have recently been overlaid between 1997 ~ll1d 2004. The 2009 program consists of se~ll projects on approximutely 16.09 miles of City streets which m-e primarily located in the southern and eastern portions of the City. A breukdown of these seals is as follows: 1 st seals 2,86 miles; MSA seals 1.31 miles; and seals on overl~iid streets 11.92 miles. An exhibit illustrating the proposed program will be available at the meding. The streets proposed for seal coating will be preceded by having cnlcks wider than om:~qLLarter inch sealed with un ebstic sealing material. In addition, the Public Works department will repair any failed areas prior to work being performed by the contractor. 7