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November 9, 2018 County Board Memo Update on Fall 2018 resurfacing NDOT Smoothness Specification 1 On state highways, the NDOT uses a full blown smoothness specification with incentives, disincentives, and a grinding requirement. The equipment is sophisticated and expensive. The NDOT Pays for everything and the average price the NDOT pays is between $4,500 to $10,372 per project. They also pay significant smoothness incentives in the tens of thousands of dollars. County Smoothness Specification We didn't think we needed a more complicated smoothness specification till this year. We don't like the potential budgetary impact of smoothness incentives with potential for incentive payouts in the tens of thousands of dollars. There are no counties in Nebraska that use a smoothness specification that includes incentives. Lancaster County asked us for a copy of Hall County's smoothness incentive last week so they could consider implementing a smoothness specification of some sorts, Drag Course The mix type in the specifications for a drag course is determined by the contractor with the mix design approved by the engineer. JIL proposed mix type "B" and the mix design was acceptable and approved. The type "B" mix did not provide as good of a surface as we've had on past projects (Gary Smith Construction and Vontz Paving), so we will not allow type "B" as a drag course in the specifications on any future projects. JIL has been told that they will have to propose a different mix for the drag course that is to be placed on One R Road east of NE Hwy 11. JIL's last Project for Hall County JIL Asphalt's last project with Hall County was paving of Webb Road south of One R School in 2014. Our smoothness specification was strengthened and can invoke portions of the NDOT's full blown smoothness specification including measuring with a profiler for IRI (International Roughness Index), guidelines for grinding, guidelines for removal and replacement, and penalties, but no incentives. Our smoothness specification added some emphasis on smoothness and attention to factors that impact smoothness. Our specifications also targeted some weaknesses in JIL's equipment. They replaced their asphalt laydown machine (paver), bought different electronics to control slope, depth and ride. They also bought a different compactor to better achieve the asphalt densities required in the specifications. The new equipment worked up till Saturday, October 20`". Update I am planning another update for the November 27"' board meeting.(Lik464 hfC Steven P. Riehle Hall County Engineer/Highway Superintendent Page 3