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Updated: January 22nd, 2009 12:44 PM GMT-05:00

Oregon Mainline Paving, LLC achieves ride smoothness bonus on new U.S. 97 realignment project in Redmond, OR

Asphalt Paving

Oregon Mainline Paving
Oregon Mainline Paving, LLC achieves ride smoothness bonus on new U.S. 97 realignment project in Redmond, OR
The bypass, which runs between the Central Oregon Irrigation District's Pilot Butte Canal and the BNSF Railroad on the east side of Redmond, handles a daily traffic count of 35,000 vehicles, 12 to 15 percent being trucks.
The Bulletin, Bend, OR
With a new 10-inch aggregate base and 10-foot concrete median barrier in place, the contractor's paving crew took over in placing approximately 110,000 tons of ODOT Level 3 12.5mm dense-graded Superpave hot mix asphalt to construct an 11-inch-thick perpetual pavement structure.
For Oregon Mainline Paving, meeting the smoothness and mix quality requirements of the project represented approximately $250,000 in additional bonus pay.

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To feed the echelon paving process, the contractor used belly-dump trailer trucks to deposit windrows of HMA in front of pick-up machines that transferred the mix into the paver hoppers.

"We were using a portable CMI counterflow plant with a 100-ton storage silo to supply our paving crew," Seehawer says. "That plant can crank out as much as 450 to 500 tons per hour; and on days where we were placing our mainline (travel lanes) lifts, we were laying 4,500 to 4,800 tons in a 10- to 10.5-hour shift."

The resulting smooth ride
Paving in echelon not only allowed Oregon Mainline Paving to maximize production, but to do so in a way that also produced the smoothness requirements the project outlined.

Using a profilometer, ODOT established a smoothness price adjustments based on a Profile Index of acceptable smoothness deviations in specified sections (mm/km or inch/mile). The contract allowed a price adjustment based on the results of the Profile Index (PI) for each 200 m (1/10th mile) segment.

The price adjustment applied only to wearing course material placed in the travel lanes of the project.

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