Laserfiche WebLink
3 for Waco Street. <br /> Ground Penetrating Radar(GPR)was performed on the street segments. Bituminous pavement thickness was found <br /> to have an average thickness of 4.20 inches on Sunwood Drive and 3.9 inches on Waco Street. GPR was not able to <br /> reliably identify the aggregate base thickness,however,the soil borings performed as part of the geotechnical report <br /> found an average of 6.4 inches. <br /> Proposed Improvements <br /> Sunwood Drive and Waco Street are Municipal State Aid(MSA) streets, and must comply with State Aid design <br /> requirements. MSA design requires these to be a 10-ton design. Based on the traffic counts performed in 2021 <br /> (1,800 ADT Sunwood, 580 ADT Waco), the required pavement section is 5-inches aggregate base and 4-inches <br /> bituminous pavement. <br /> Staff review found existing pedestrian ramps within the project area did not meet current ADA requirements, and <br /> therefore will need to be removed and replaced. The concrete curb and gutter were found to generally be in good <br /> condition, and only spot repairs are proposed. Staff is proposing minimal impacts to the existing bituminous trail <br /> with the project beyond what is required for matching into the new pedestrian ramps. The south leg of trail at the <br /> intersection of Sunwood Drive and Trunk Highway 47 is proposed to be straightened,the current 90-degree corner <br /> is a hazard for plowing. <br /> Review of the sanitary sewer and watermain did not find issues requiring repair. The City will be placing inflow <br /> and infiltration(I &I)barriers on the sanitary sewer manholes with this project. The City received I &I grant <br /> funding from the Metropolitan Council of Environmental Services for this work, which will reimburse the City for <br /> the costs associated with the I &I barriers. <br /> Televising of the storm sewer system found more issues than anticipated, and will require removal and replacement <br /> of six storm sewer structures and their connecting pipes. The majority of this work will be concentrated at the <br /> intersection of Sunwood Drive and Zuni Street. <br /> The current pavement marking layout meets State Aid standard, and the road is proposed to be marked back to the <br /> existing layout. <br /> Generally, impacts to boulevards will be minor,just as necessary for removal and replacement of concrete curb and <br /> gutter,pedestrian ramp improvements, and excavation required for the storm sewer repairs. <br /> Anticipated Construction Process <br /> •Install traffic control measures <br /> o These are maintained throughout the project <br /> o Layout of traffic control may be adjusted to accommodate construction periodically <br /> •Install I&I barriers on sanitary manholes <br /> •Install erosion control measures <br /> •Full-depth reclamation of existing bituminous pavement and aggregate base <br /> • Storm sewer repairs <br /> •Project removals (spot curb and gutter,pedestrian ramps, driveways as needed) <br /> •Place new concrete curb and gutter and pedestrian ramps (5 to 7-day cure time) <br /> •Remove excess reclaim material, shape and compact 5 inches of remaining material <br /> o Excess reclaim is stockpiled and will be used on future City projects <br /> •Place first lift of new bituminous pavement <br /> •Finish any trail and driveway repairs <br /> •Restore the boulevard in any impacted areas <br /> o 4 inches topsoil, seed and hydro-mulch <br /> •Place the final lift of new bituminous pavement <br /> o Remove traffic control measures as allowed <br /> •Place all pavement marking,must wait 72 hours after paving <br />