b"RUNWAYS CWA55During the first phase of work, a temporary fence was installedso the airport has used the same strategy on other pavement to separate the project from the airport operations area, both as asections, including when Runway 8-26 was reconstructed in security measure and to mitigate potential runway incursions. An2004. The special subbase was part of the plan for Runway 17-east-west fence separated construction personnel on the south35. However, FAA did not have a standard materials specification end of the runway from the airport operations area.for the crushed rock, so CWA officials and Becher-Hoppe worked During intersection work, that 6,500-foot temporary fencewith agency on a modification of standards for the subbase. was relocated to remove the entire intersection from the aircraftBecause it wasnt a standard material, it took a little bit of operating area because crews would be working within 10 feet ofwork getting there, but we finally were able to get approval to use the displaced threshold safety area. That was really effective inthat crushed rock and to include recycled existing concrete from streamlining and making the project easier from both a securitythe site, says Kemper. A crusher was set up on-site to process and a traffic control standpoint, Cihlar notes. the reclaimed concrete. Reusing it reduced the amount of material that needed to be hauled in for the project. The runway and taxiway were outfittedAirport Improvement Ad (July '22).ai 1 7/11/2022 2:19:58 PMwith new LED lights, funded by an Airport Improvement Program grant. At the same time, the airport updated all of its navigational aids for 17-35, adjusted the elevation of Runway 17s precision approach pathway indicator and installed a new precision approach pathway indicator on Runway 35.Solutions for Unique Soil Experience ExceptionalWith Runway 17-35 requiring a full-depth reconstruction, project engineers had their hands full. Karl Kemper, president and project engineer with Becher-Hoppe, describes the soils at CWA as very challenging and highlyKARL KEMPER Werevariable. Frost susceptibility, variable ground water levels and shallow bedrock posed compounding challenges for the project, hePassionateadds. Airport officials have been aware of their frost-susceptible soils almost as long as CWAAbouthas been open. In the early 1980s, pavement was failing much earlier than expected, and the airport developed a subbase pavementAviation section that would address the issue. Wisconsin Department of Transportation, FAA and U.S. Army Corps of Engineers were key partners in that effort. The design they developed is a layered subbase of crushed rock topped with a layer of concrete. The subbase contains 3 feet of large 12-inch-minus stone, followed by a layer of 3-inch-minus stone, and a 1-inch-minus stone layer on top of that. The idea is to have an open and free-draining subbase to get allDiscoverof the water out, thats also sturdy to help bridge over any low-strength underlying soils,What DrivesKemper explains.That PassionA portion of Taxiway B constructed with that subbase in 1985 is still holding up very well, AirportImprovement.comSeptember 2022"