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Title
Change Order/Amendment No. 14 in the net amount of $19,330.55 with Austin Bridge and Road, L.P. for MacArthur Paving and Drainage Improvements
Presenter
Romin Khavari, City Engineer
Recommended Action
Approve
Analysis
On April 21, 2015 the City of Grand Prairie (15-4571) awarded a construction contract to Austin Bridge and Road, L.P in the bid amount of $14,707,420.34 and a total project cost of $16,205,025 for MacArthur Blvd Paving and Drainage improvements between IH 30 and West fork of the Trinity River.
This project provided for the construction of 4,743 linear feet of 4-lane divided thoroughfare in MacArthur Blvd from IH-30 to north of the West fork of Trinity River to connect to the existing concrete roadway. The project also included the construction of Two-700 linear feet bridges over the Trinity River; 555 linear feet of 37’- wide new concrete roadway to the Land fill Road; construction of approximately 1400 linear feet of bypass channel across the existing Trinity River ox-bow to the west of MacArthur Blvd. to improve channel hydraulics and mitigate for the approximate 4 feet embankment fill required for the roadway.
This proposed Change order/ Amendment No. 14 in the net amount of $19,330.55 provides for the installation of additional Gabions at the banks of the west fork of the Trinity River, grass sod, Traffic Signal camera and cable and a steel frame gate.
Change order/ Amendment No.1 approved by Council April 5, 2016 (16-5523) in the net negative amount of -$27,431.93 provided for revisions of bridge lighting conduit plans and the addition of an electrical service for bridge lighting on the north side of the Trinity river inside Irving City limits;
Irving will take over Bridge maintenance following completion of construction; change order No.1 also provided for additional storm drain pipe to convey storm water from a low spot area inlet on Forterra plant site and other miscellaneous adjustments.
Change order/ Amendment No.2 in the amount of $49,869.19 provided for the under cutting and removal of unsuitable bedding material encountered during storm drain construction and replacing it with clean density controlled compacted fill; it also provided for installation of concrete safety barriers.
Change order/ Amendment No.3 approved by Council August 16, 2016 (16-5917) in the amount of $54,640.51 provided for the decorative painting of proposed concrete bridge rails, additional temporary HMAC pavement for a driveway approach access from the landfill road to an adjacent property to the north and the installation of a 2” HDPE water service; it also provides for reductions and adjustments of miscellaneous contract quantity items.
Change order/ Amendment No.4 in the amount of $4,314.94 provided for Landfill gate relocation and Tree removal.
Change order/ Amendment No.5 in the amount of $5,036.50 provided for off -duty officers furnished by contractor to direct traffic during MacArthur closures through detours at IH-30 and Hunter Ferrell Road.
Change order/ Amendment No.6 approved by City Council on 12/31/16 (16-6170) in the amount of $425,989.33 provided for additional quantities of the concrete retaining walls and bridge bents and other miscellaneous items work;
Change order/ Amendment No.7 in the amount of $38,745 provided for quantity overruns of Extra depth 48” drilled shafts at the bridge; it also provided for quantity underruns of 36” and 18” drilled shafts.
Change order/ Amendment No.8 approved by City Council on 4/4/17 (17-6613) in the net amount of $63,865.39 provided for additional rubble removal found during channel excavation and for quantity overruns of driveway pavement repairs including flex base and Asphalt transition; it also provides for quantity underruns of Sidewalk, hand rail and retaining wall at Forterra’s entrance.
Change order/ Amendment No. 9 approved by City Council on 5/2/17 (17-6721) in the amount of $150,000 provided for the hauling of the material to the stockpile location adjacent to the Tarrant Road project site, installation of erosion control measures around the stockpile to keep the stockpile contained within its designated area, updating of the Storm Water Pollution Prevention Plan to include this stockpile site, and other miscellaneous items related to this work. The City received a price of $8 per cubic yard of material from Austin Bridge & Road to haul this material to the Tarrant Road site, which is substantially less than the $15 to $20 per cubic yard the City has received from contractor bids on previous projects for borrow material brought in from off-site, so the City anticipates a significant savings for the approximately 11,000 cubic yards of material to be hauled from the MacArthur site to the Tarrant Road site.
Change Order/Amendment No. 10 in the amount of net negative ($9,845.00) reduced the pricing for silt fence and maintaining the Tarrant stockpile from Change Order/Amendment No. 9.
Change Order/Amendment No. 11 in the amount of $11,514.80 allows for conductors for bridge illumination and barrier free ramps.
Change order/ Amendment No. 12 approved by City Council on 8/1/17 (17-6986) in the amount of $153,528.66 provided for the construction of approximately 3800 linear feet of 4-foot- sidewalk, 260 feet of 5-foot sidewalk in the TxDot ROW at IH
30 and forty feet of transition section of 10’ sidewalk to tie into the Irving sidewalk north of the bridge; it also to also provided pedestrian access for the area as well as pedestrian signal at Landfill Road
Change order/ Amendment No. 13 in the net amount of $24, 012.94 provided for traffic railing modifications, additional median and concrete pavement, additional street striping, traffic signal camera and cable modifications and other miscellaneous items of work.
The completion date for this project remains April 1, 2018.
Financial Consideration
Cumulative amounts over $50,000 require City Council approval prior to execution.
Funding of the $19,330.55 is available in the Grant in the Grant Fund (300596) 36509015 (MacArthur Blvd)