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Ordinance amending the FY 2019/2020 Capital Improvement Projects Budget; Construction contract with McMahon Contracting, LP for Cottonwood Creek Drainage Improvements at Marshall Drive and Robinson Road to include Paving Improvements for Alternate No. 1 bid in the total amount of $3,341,969.01; material testing with Alliance Geotechnical Group in the amount of $91,812.60; in-house engineering in the amount of $167,098.45; and 5% construction contract contingency in the amount of $167,098.45 for a total project cost of $3,767,978.51
Presenter
Gabe Johnson, Director of Public Works; Walter Shumac, Director of Transportation and Romin Khavari, City Engineer
Recommended Action
Approve
Analysis
On Tuesday, February 18, 2020, the City of Grand Prairie opened bids for Cottonwood Creek Drainage Improvements at Marshall Drive and Robinson Road (W.O. #615.60) to include Paving Improvements (W.O.#618.77). The low bidder is McMahon Contracting, LP in the Alternate Bid No. 1 for total bid amount of $3,341,969.01.
The Cottonwood Creek Drainage Improvements at Marshall Drive and Robinson Road (W.O. #615.60) project provides for 100-year flood capacity bridge improvements at the Marshall Drive crossing of South Fork Cottonwood Creek and provides for 50-year flood capacity bridge improvements at the Robinson Road crossing of South Fork Cottonwood Creek. Providing a 100-year capacity bridge at Robinson Road would be too disruptive to the existing adjoining properties. Providing a 100-year capacity crossing at Marshall Drive will allow a detour route for Carrier Parkway northbound traffic when Carrier is closed during flood events. The Paving Improvements (W.O.#618.77) will include re-building the Marshall and Robinson Intersection to extend and include the proposed bridges to then match existing grades.
This project provides for removal of the existing inadequate box culverts at South Fork Cottonwood creek at Marshall and Robinson Road and the construction of two 120-foot long bridges to reduce flood backwater upstream of these two South Fork Cottonwood Creek crossings. The proposed improvements features include two 120-foot bridges spanning South Fork Cottonwood Creek, 23,900 cubic yards of channel and roadway excavation, installing permanent grouted rock riprap and reinforced concrete channel erosion control slope protection, cast in place retaining walls, relocation of a 12 inch diameter water line, 3,210 square yards of asphalt overlaid concrete street paving replacement and other miscellaneous items necessary to complete the construction in accordance with the conformed bid plans and specifications.
City Staff and Halff Associates (Project Consultant) recommend the award of the Additive Alternate Bid No. 1 for this project as it provides for a TXDOT recommended high performance concrete for the bridge roadway slabs at no extra cost as compared to the Base Bid. High performance concrete bridge slabs are more durable for structures subject to icing in cold weather.
Due to the work being performed primarily along cottonwood creek and to expedite the construction of this project, based on the Engineer's recommendation and feedback from the contractors during the bidding phase, the Closure of Marshall Drive and Robinson Road to traffic will be required for this project, but not at the same time to allow for localized traffic flow. During the construction, Marshall Drive will be closed up to 252 calendar days (36 weeks) and Robinson Road will be closed up to 196 calendar days (28 weeks.) Allowing for the closure of Marshall Drive and Robinson Road during the bridge construction will save significant cost, significant private property impacts and provide for a shorter construction time period.
Company Base Bid Alternate Bid No. 1
McMahon Contracting, L.P. $3,341,969.01 $3,341,969.01
SEMA Construction, Inc. $3,382,239.80 $3,382,239.80
Rebcon, Inc. $3,993,794.00 $3,993,794.00
IBCTX, LLC $4,276,478.00 $4,280,318.40
Ed Bell Construction Company $4,278,900.75 $4,278,900.75
Urban Infraconstruction $4,354,178.65 $4,362,944.55
HQS Construction, LLC $5,553,413.00 $5,727,968.45
The Engineer's opinion of probable cost was $3,168,000.
City Staff and Halff Associates (Project consultant) recommend award of this project to McMahon Contracting for Alternate Bid No. 1 in the total amount of $3,341,969.01.
Construction of this project is scheduled to begin around the end of March 2020 with projected completion around June 2021.
Financial Consideration
Funding in the total amount of $3,767,979 is available as follows:
1. $1,635,481 is available in Storm Drainage Capital Projects Fund (401592) WO #01506003 (Marshall & Robinson @ Cottonwood Creek)
2. $1,974,750 is available in Street Capital Projects Fund (400192) WO #01807703 (Marshall and Robinson Paving Improvements)
2. $157,748 is available by appropriating and transferring from the unobligated fund balance of Storm Drainage Capital Projects Fund (401592) to WO #01506003 (Marshall & Robinson @ Cottonwood Creek)
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AN ORDINANCE OF THE CITY OF GRAND PRAIRIE, TEXAS, AMENDING THE FY 2019/2020 CAPITAL IMPROVEMENT PROJECTS BUDGET BY TRANSFERRING AND APPROPRIATING $157,748 FROM THE UNOBLIGATED FUND BALANCE IN THE STORM DRAINAGE CAPITAL PROJECTS FUND (401592) TO WO #01506003 (MARSHALL & ROBINSON @ COTTONWOOD CREEK)
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF GRAND PRAIRIE, TEXAS:
SECTION 1. THAT THE FY 2019/2020 Capital Improvement Projects Budget be amended by transferring and appropriating $157,748 from the unobligated fund balance in the Storm Drainage Capital Projects Fund (40192) to WO #01506003 (Marshall & Robinson @ Cottonwood Creek)
PASSED AND APPROVED BY THE CITY COUNCIL OF THE CITY OF GRAND PRAIRIE, TEXAS, MARCH 3RD, 2020.