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, ,,, HALL COUNTY PUBLIC WORKS DEPARTMENT <br /> 2900 WEST 2"' ST, GRAND ISLAND, NE 68803-5263 <br /> `� <br /> .`, { r�,n � i www.hallcountyne.gov <br /> t r 2 PHONE: (308) 385-5126 FAX: (308) 381-6486 <br /> Steven P.Riehle,P.E. <br /> County Engineer/Highway Superintendent <br /> yt F. ^ c steverhallcountyne.gov <br /> RA <br /> November 9, 2018 <br /> Summary of County Board Agenda Item <br /> Update on Fall 2018 Resurfacing <br /> Wood River Road west of NE Hwv 11 is Rough <br /> We've been: <br /> • monitoring the work, <br /> • talking with JIL's supervisors & management, <br /> • talking to the electronics company trouble shooting the electronics on the asphalt paver, <br /> and <br /> • talking to the manufacturer of the paver— NMC - Caterpillar. <br /> We are providing some suggestions or input, and asking questions of everyone involved in <br /> the trouble shooting to help determine the cause for a rough road. <br /> • The specifications include some method of construction specs, but are largely end result <br /> specifications. <br /> • We pay for a smooth road, and it's the contractor's responsibility to figure out how to <br /> provide it. <br /> Smooth Resurfacing at First <br /> We check the smoothness of new asphalt with a "bump buggy" that we borrow from the <br /> NDOT. The specs call for a smoothness of better than 1/8" over a 10' straightedge. Our <br /> smoothness specs also can partially implement the NDOT's full smoothness specification. <br /> • Bottom Lift - The bottom lift (drag course) was pretty smooth. JIL did grind some bumps <br /> on the drag course so they didn't reflect through the top lift (surface course). <br /> • Top Lift - The top lift (surface course) of asphalt on the approximately 1 ''A mile long <br /> section of the eastbound lanes that was paved on October 18th and 19Th (south side of road) <br /> was smooth. <br /> Then the Roughness Starts <br /> When JIL started the top lift of asphalt on the westbound lanes on Saturday, October <br /> 20`h,something was messed up with the paver, screed, electronics, or something (north side <br /> of road west of NE Hwy 11). They've numerous things like <br /> • replacing hydraulic actuators, <br /> • adjusting sensitivity settings, <br /> • installing new electronic sensors for slope, <br /> • trying different sensors for depth, <br /> • making adjustments to sensors for horizontal augers, <br /> • checking the paver counter-weight that helps keep the hydraulics from settling when the <br /> machine stops, <br /> • and more. <br />