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Title
Change Order/Amendment No. 5 in the net amount of $80,193.05 with Tiseo Paving Company for Great Southwest Parkway Improvements
Presenter
Romin Khavari, City Engineer; Walter Shumac, Director of Transportation, and Gabriel Johnson, Director of Public Works.
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 #5 in the total net amount of $80,193.05 provides for the following:
During construction, a 12” water line connection that crosses Great Southwest Parkway was discovered to be too shallow. A new line has been proposed by Kimley-Horn at an acceptable depth. The cost associated with this work is a net of $52,332.00
While drilling for the bases of the signal lights at Forum and Great Southwest Parkway, ground water was discovered beyond the depth that was bored. In order to provide appropriate depth for the pole base, a casing was needed to keep water from infiltrating into the base. The cost associated with this work is a net of $8,050.00
Per an agreement with Quality Inn, additional paving up to the existing canopy will need to be removed and replaced in order to accommodate the existing paving tying into the proposed street elevations. During demolition, existing private electrical and irrigation lines that had not been located were prior to demolition of the sidewalk and are proposed to be replaced. The cost associated with this work is a net of $19,811.05
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.
Change Order/Amendment No. 3 approved by City Council (18-8251) on September 18, 2018 in the net amount of $115,139.15. The change order was required when a valve on the 24" waterline along Mayfield Road west of Great Southwest Parkway broke and the water main had to be turned off using a line stop to make make connection to the new 30" waterline without shutting water off at the water tower and minimally impacting customers.
Change Order/Amendment No.4 administratively approved in the net amount of $2,807.50. The change order was required for additional traffic control at the intersection of Great Southwest Parkway and Sarah Jane.
There are no additional days associated with this change order; thus the completion date is May 30, 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. 5 in the net amount of $80,193.05 with Tiseo Paving Company for Great Southwest Parkway Improvements, is available in Water Capital Projects Fund (500592) WO #01710103 (GSW Pkwy Sara Jane).