Lindsey Street (from 24th Ave. SW to East of Berry Rd.), Norman, OK
Contractor: Sherwood Construction Company
Owner: City of Norman
Engineers: Poe & Associates, Inc. and Atkins
This important stretch of roadway is lined with restaurants, businesses and homes, and is also a vital like to the University of Oklahoma. With about 25,000 vehicles (including delivery trucks) using this roadway every day, it’s easy to see why there was a lot of attention on this project.
This project was the second portion of a major upgrade to this important corridor. After citizens of Norman approved a major bond issue, crews went to work on utility relocation and other work, including the upgrade of a water line through this area.
Sherwood Construction coordinated closely with hundreds of businesses located along the corridor to maintain access throughout the whole project. The project was phased almost as if it were two separate projects.
The contractor first established a detour by removing the existing curb, then connecting all the driveways with a 6 in. fiber reinforced concrete pavement on untreated base.
To construct the base, Sherwood used a modified cement-treated base/econocrete base, which they developed to allow the use of ready mixed concrete. Placing the econocrete base with a slipform paver had its challenges because of it was only 4 in. thick. To meet the challenge, Sherwood developed a sliding rail forming system to place the material by hand. Pins where set on grade and a steel channel was set on the pins. The channel would slide from pin-to-pin and served as a strike off for base material.
The contractor moved traffic out to install a new storm sewer system which, at some locations, was an 8 ft. x 7 ft. box that was almost 20 ft deep to the flowline. The replacement storm sewer extended to two side streets to alleviate flooding in the residential areas north of the corridor.
Sherwood then detoured traffic to one side of the grade to construct half the new driveways and the 8 in. jointed plain concrete pavement. The traffic was then moved to the new pavement to allow construction of the other half of the roadway. Next, the median and islands were constructed to complete the middle of the roadway.
Slipform paving proved to be challenging. String line was set to get the most productive run of each paving section, typically from intersection to intersection. The contractor would then block out alternating driveways to maintain access to the businesses. The block-outs would be poured by hand later using a high early strength concrete mixture that would allow for re-opening the driveways 24 to 48 hours later.
This high-profile project required excellent communications. The City of Norman had several public meetings before the project started to inform businesses and residents along the project of the upcoming work.
During construction Sherwood and the engineers would meet with city officials on a bi-weekly basis to go over project schedule. Businesses or residents that were would also be notified in advance of work, and in time for city officials to issue press releases and media advisories about upcoming closures or traffic switches.
The contractor earned a $400,00 incentive for early completion of the project and now, local residents and roadway users have a long-lasting, high quality concrete that will serve this busy corridor for many years to come.