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Title
Change Order/Amendment No. 7 in the net amount of $80,329.45 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 #7 in the total net amount of $80,329.45 provides for the following:
During construction, additional paving needed to be removed at the driveway replacements due to gutter line issues, existing pavement joints, and poor condition of existing pavement at tie-in location. The cost associated with this additional work is $18,905.90.
During construction, a called out existing 8” line was discovered to be a 12” water line. The cost associated with this additional work is $3,150.
Field quantities differed from the quantities estimated for bidding purposes. An additional 11 vertical feet of 5’ manhole depth, relocation of blow-off valve, and 3 additional manhole removals. The cost associated with this additional work is $12,102.30.
Due to conflicts that were found in the field with existing utilities, temporary overhead signal wiring will need to be installed at Forum and Great Southwest Parkway. Additionally 4 ground boxes with aprons and 2 communication boxes with aprons will need to be installed that were initially designed to remain. The cost associated with this additional work is a net of $46,171.25
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 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.
Change Order/Amendment No.5 approved by City Council (18-8367) on November 6, 2018 in the amount of $80,193.05. The change order was for installing a new 12” line crossing under Great Southwest Parkway that was too shallow, installing steel casing for signal pole bases to prevent water from infiltrating the pole bases and unforeseen damage to repair irrigation and electrical lines for Quality Inn.
Change Order/Amendment No.6 approved by City Council (18-8495) on December 11, 2018 in the amount of $44,668.95 The change order was for installing a new 12” line crossing under Great Southwest Parkway that was too shallow, installing steel casing for signal pole bases to prevent water from infiltrating the pole bases and unforeseen damage to repair irrigation and electrical lines for Quality Inn.
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. If approved, the total percentage of change orders from the original contract will be 5.12%.
Funding for Change Order/Amendment No. 7 in the net amount of $80,329.45 with Tiseo Paving Company for Great Southwest Parkway Improvements, is available as follows:
1. $11,472.30 is available in Water Capital Projects Fund (500592) WO #01710103 (GSW Pkwy Sara Jane - WTER) Contract 271430 Contingency Line 4
2. $8,190.00 is available in Storm Drainage Capital Projects Fund (401592) WO#01806103 (GSW Pkwy Sara Jane - STRM) Contract 271430 Contingency Line 8
3. $60,667.15 is available in Street Capital Projects Fund (400192) WO#01605703 (GSW Pkwy Sara Jane -STRT) Contract 271420 Contingency Line 2