Ramsey Resident - 2022 - January/February

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Ramsey’s Roads: A Plan for Pavement Management and Maintenance ? e City of Ramsey maintains more than 185 miles of public streets by employing a Pavement Management Program (PMP), which is reviewed and adjusted annually based on updated pavement condition ratings and traﬃ c volumes, public input, and other select criteria. ? e primary goal of the PMP is to proactively maintain all pavement sections by performing the proper treatment at the op- timal time to maximize the life of the pavement as cost-eﬀ ectively as practical. If pavement sections are constructed or reconstruct- ed to current design standards and are proactively maintained therea? er, pavement sections will generally last for 60 years before reconstruction is required. However, if pavement sections are not proactively maintained, they will generally require reconstruction a? er 30 years. Below is a summary of PMP treatments currently performed on City streets with bituminous pavement sections, which comprise over 97-percent of Ramsey’s public streets. • Pavement Rejuvenation – Several miles of public streets annually receive a maltene-based emulsion application, which is absorbed into the pavement surface to keep it ? exible, preventing cracking. ? is treatment is currently being applied to new pavement surfaces within the ? rst three years. However, this schedule may change over time depending on how well it performs. ? is treatment was ? rst applied to City streets in 2020 following the termination of the sealcoat program in 2019. • Crack Seal – Dozens of miles of public streets receive crack seal improvements annually to prevent stormwater runoﬀ from seeping under the pavement. ? is minimizes damage caused by wet subgrade soils, especially during freeze-thaw cycles. Crack seal improvements are typically completed every third, seventh and fourteenth year a? er initial construction, overlays and reconstruction. • Overlay/Mill and Overlay – Several miles of public streets annually receive overlay improvements, which typi- cally involves placing two inches of new pavement on top of existing pavement sections, which may or may not be milled before overlaying the pavement. Overlay improvements are typically completed 20 years following initial construction, a previous overlay and reconstruction. • Reconstruction/Reclamation – Several miles of public streets are annually reconstructed/reclaimed, which gen- erally occurs 30 to 60 years a? er the street is constructed or reconstructed, depending on the existing pavement section and the level to which the pavement was maintained over the years. o Reclamation – ? is process involves reclaiming (recycling) the existing bituminous pavement plus a portion of the underlying aggregate base, then placing and compacting reclaimed material on top of the remaining aggregate base before adding a new pavement section. In general, reclaiming pavement sections is preferred to reconstructing pavement sections since it is signi? cantly less expensive and results in the same life expec- tancy as a reconstructed street. o Reconstruction – ? is process involves removing the entire existing pavement section, curb and gutter if it exists and replacing it using all new materials. A ? gure showing all PMP projects scheduled for the next 10-years per the currently adopted Capital Improvement Program (CIP) can be viewed at http://www.cityoframsey.com/666/Pavement-Management-Program. As noted earlier, these projects are subject to change based on annual reviews and adjustments to the PMP. For more information, please contact City Engineer Bruce Westby at 763-433-9825 or email bwestby@cityofram- sey.com. 10Ramsey Resident • January/February 2022