ACPA Concrete Pavement Progress - Winter 2022-23

CONCRETE PAVEMENT PROGRESS 14 WWW.ACPA.ORG MUNICIPAL STREETS & INTERSECTIONS (<30K SY) Fairoyal Drive Reconstruction Des Peres, Missouri CONTRACTOR: E. Meier Contracting OWNER: City of Des Peres ENGINEER: City of Des Peres SILVER 10th Ave. Watertown Reconstruction Project Watertown, South Dakota CONTRACTOR: Timmons Construction Inc.* OWNER: City of Watertown ENGINEER: Civil Design Inc. In the summer of 2021, the City of Des Peres, Missouri, undertook its largest street replacement project in decades. While a 9,000-square-yard street replacement project may not be large for DOTs or big cities, it was significant for the city of 9,200 residents. Fairoyal Drive is a mile-long neighborhood collector for over 300 homes. Due to the potential impact on residents, the previous public works administration replaced only small segments at a time. Ultimately, this delayed the needed replacements, disturbed the neighborhood repeatedly, and increased prices. The City successfully completed a larger project on Fairoyal Drive with no increased impact in the neighborhood, then budgeted to replace the remaining 9,000 square yards in 2020. Rather than just replacing the existing concrete, the project solved two longstanding resident complaints—groundwater problems that created wet yards and basements, and notoriety as the worst residential street for speeding. A new storm sewer and the option for residents to tie into it mitigated the water issues, and the incorporation of neckdowns at three locations into the design addressed the speeding issue. The City required a unique, 16-phase plan for the project. Each phase typically included four homes, and sequential phases were intentionally not adjacent to one another. This plan provided on-street parking for residents whose driveways were unusable. The contract allowed 150 calendar days for completion, with work starting immediately after Memorial Day. While the installation of the drainpipe to accommodate groundwater seepage was completed in three weeks, a labor shortage delayed the contractor’s pavement work for over one month. The use of a modified concrete mix to gain early strength and accelerate the project schedule put the contractor back on track. A project nearly a decade in the making, the City of Watertown had to work with residents who opposed the project that would widen the street to three lanes to include a center turn lane and remove much of the mature tree canopy lining the corridor to allay their concerns. During the delay, the existing asphalt street continued to deteriorate rapidly. 10th Avenue NW is a collector street that runs mainly through a residential area but ultimately is the main street to the hospital from U.S. Highway 81 and carries 5,000 vehicles per day. The project consisted of nine blocks of city residential street reconstruction. The project began at the hospital and ended at the intersection of U.S. Highway 81. The project was bid as an alternate design/alternate bid project with the asphalt section being 6 inches of asphalt on 10 inches of base course vs. 8 inches of doweled concrete on 8 inches of base course. The concrete option came in at a higher initial cost, but the City of Watertown engineering staff and city council both found it to be ultimately the best option to select the concrete pavement option. The project was divided into two separate phases. The work on each phase included existing asphalt street removal, numerous mature tree removals, storm sewer updates for one phase, new water and sanitary sewer for both phases, a new three-lane 8-inch portland cement concrete street with monolithic curb, a new sidewalk the entire length on one side, new ADA compliant ramps, and new trees to replace the removed ones. GOLD