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Title
Change Order/Amendment No. 3 in the net amount of $115,139.15 with Tiseo Paving Company for Great Southwest Parkway Improvements
Presenter
Walter Shumac, Director of Transportation, Gabriel Johnson, Director of Public Works, and Romin Khavari, City Engineer
Recommended Action
Approve
Analysis
On December 12, 2017 the City of Grand Prairie approved a Construction Contract with Tiseo Paving Company in the total negotiated amount of $12,688,471.60 for Great Southwest Parkway from Sara Jane Parkway to Mayfield Road; materials testing with Alliance Geotechnical Group in the amount of $159,504; 5% contingency in the amount of $634,424; In-house engineering in the amount of $317,212; street lighting allowance of $52,000; signal/fiber allowance of $200,000; additional traffic control allowance by Grand Prairie Police Department $104,000; for a total project cost of $14,155,612
This project provides for the construction of approximately 4,900 L.F of 6 concrete lanes divided roadway (89- foot wide) with utilities from IH 20 to Mayfield Road.
The current proposed Change Order/Amendment #3 in the total net amount of $115,139.15 provides for the following:
During construction, a butterfly valve on our 24” waterline along Mayfield west of Great Southwest Parkway was broken in the open position by the City while attempting to close. This valve controls water along Mayfield Road and south along Great Southwest Parkway. This valve needs to be turned off in order for the contractor to make connections to the new 30” water line without shutting water off at the water tower. If the water is shut off at the water tower, water pressure will be lost to all the residents and businesses west of Great Southwest Parkway.
In order to avoid shutting down the entire line, the contractor will put in a line stop isolating the existing 24” water line going towards Great Southwest Parkway allowing the contractor to make the necessary connections while minimally impacting businesses along Mayfield.
Change order/ Amendment No. 1 approved by City Council (18-7833) on May 1, 2018 in the net amount of $19,835 provided for additional 4,100 linear feet of silt fence, 2 additional construction entrances, upsizing 4 wastewater manholes to 5’ manholes and field survey of AT&T lines to determine conflicts.
Change Order/Amendment No.2 approved by City Council (18-8053) on July 17, 2018 in the net amount of $306,783.64. The change order was required when the contractor found a multi-duct underground AT&T duct system that caused a conflict to construct the TRA 36” main as well as conflicts with the propped bridge piers and storm drain.
There are 20 additional days associated with this work thus the completion date is now May 10, 2020.
Financial Consideration
State statute requires City Council approval when the cumulative costs of a change order exceeds $50,000.
Funding for Change Order/Amendment No. 3 in the net amount of $115,139.15 with Tiseo Paving Company for Great Southwest Parkway Improvements, is available in Water Capital Projects Fund (500592) WO #01710103 (GSW Pkwy Sara Jane).