"The DOT issues the Superpave specifications for the project, but the paving contractor (ICON, who also produces the mix) must submit the mix design to be used and then perform the testing of the pavement during placement," Rush notes. "On Stage 1, all requirements were met and there were no ride smoothness penalties assessed by WSDOT."
As Rush points out, quality delivery issues like density and ride smoothness are always a concern, especially when new pavements, particular mixes with stiff binders, in the Northwest at night late in the construction season.
"As the season winds down, it's a day-by-day situation, with frequent rain and cooler temperatures limiting the time you can actually get out to pave," Rush says. "Working under an accelerated schedule, in dark conditions, and alongside moving traffic is definitely challenging, but we continue to work toward a completion objective that meets our customer's (WSDOT) expectations."