Author: TechBB

On the surface airfields are so flat, that what lies underneath can provide special surprises. In order to construct Denver International Airport’s De-Ice Pad ‘WA’, a spectacular drainage system was placed. A 950 foot long triple-barrel concrete box culvert, 30’ wide and 16’ high, had to be built in an existing creek bed to provide for major drainage under the new WA taxiway and de-icing pad. Earth fill was placed in depths up to 60 feet, with 120-days allowed for settlement prior to placement of stabilized subgrade and pavement layers, minimizing the potential for pavement settlement in this high fill area. Ensuring project difficulty, the main fiber-optic cable providing communications

For people traveling from the northeast quadrant of Arkansas to Oklahoma, US-64 through Vilonia is a popular cut-off to avoid going through Little Rock. However, one high school, a middle school and 2 elementary schools are all located right on US-64, a serious safety concern with the traffic volume. The average daily traffic volume of 7,000, including 16% trucks, easily exceeds the local population of just over 3,900. The Vilonia Bypass was designed to alleviate this issue and accelerate travel time. The project provided 10 miles of Portland Cement paved four lane highway with asphalt tie-ins at both ends. The major scope of work included 306,500 SY of 9” and

This MDOT Design-Build project reconstructed 9.43 miles of I-94 in Jackson County from the Washtenaw County Line to east of Sargent Road. The Eastbound lanes and 3.6 miles of Westbound I-94 were reconstructed with non-reinforced PCCP. MDOT specified the remaining westbound roadway to be cold milled and asphalt resurfaced. Design also included reconstruction of the bridges carrying I-94 over Race Road and the Whipple Road flyover, widening the bridges to FHWA standards. Both Grass Lake weigh stations were improved with new scales, lighting, expanded ramps and parking areas. Ramp reconstruction at four interchanges, Portland Cement-Treated Permeable Base, major drainage improvements, signing, traditional and cable guardrail, fencing, plantings and erosion control

This project was part of the Colorado Department of Transportation’s ongoing reconstruction of I-225 from I-25 and I-70. The 2 mile reconstruction widened the existing highway to 3-lanes in each direction with an additional auxiliary lane. The project scope included removal of the existing pavement, earthwork, placement of median barrier, sound walls, MSE walls, soil nail walls, storm sewer and drainage improvements, electrical and signage upgrades, sub-grade improvements, and repaving with over 135,000 SY of 13” thick PCCP. The Project design consisted of 13 inches of concrete pavement over a lime treated sub grade, providing for a long life, economical, cost effective pavement solution. This sustainable design choice provided for