TRANSMITTAL LETTER FOR BOARD MEETING OF AUGUST 6, 2020
COMMITTEE ON PROCUREMENT
Mr. Brian A. Perkovich, Executive Director
Title
Authority to increase Contract 13-106-4F McCook Reservoir, Des Plaines Inflow Tunnel, SSA, to Walsh Construction Company II, LLC in an amount of $125,444.75, from an amount of $107,873,223.24, to an amount not to exceed $107,998,667.99, Account 401-50000-645630, Purchase Order 4000037
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Dear Sir:
On June 16, 2016, the Board of Commissioners authorized the Director of Procurement and Materials Management to award Contract 13-106-4F, McCook Reservoir, Des Plaines Inflow Tunnel, SSA, to Walsh Construction Company II, LLC, in an amount not to exceed $107,770,362.00. The scheduled contract completion date is November 17, 2021.
As of July 17, 2020, the attached list of change orders has been approved. The effect of these change orders resulted in an increase in an amount of $102,861.24 from the original amount awarded of $107,770,362.00. The current contract value is $107,873,223.24. The prior approved change order reflects a 0.10% increase to the original contract value.
The contractor, per the plans and specifications, was required to excavate a construction shaft that would act as an access point for the equipment and personnel for the proposed Des Plaines Inflow Tunnel. The contract documents showed the top of rock to be 11.80 feet below ground elevation at the shaft, however, the field conditions during excavation revealed top of rock at 24.93 feet below grade. While the overall depth of excavation was the same, the difference in top of rock elevation resulted in approximately 13 feet of additional overburden to be removed and corresponding 13 feet less of rock removal. The contractor submitted a cost proposal (CCO-013) for an extra in the amount of $303,664.91, and a credit in the amount of $178,220.16, for a net extra in the amount of $125,444.75. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence 1137, that the Engineering Department would recommend its approval.
This change order is in compliance with the Illinois Criminal Code since the change is due to circumstances not reasonably foreseeable at the time the contract was signed, and are in the best interest of the District.
It is hereby recommended that the Board of Commissioners authorize the Director of Procurement and Materials Management to execute a change order to increase Contract 13-106-4F in an amount of $125,444.75 (0.12% of the current contract value), from an amount of $107,873,223.24, to an amount not to exceed $107,998,667.99.
Funds are available in Account 401-50000-645630.
Requested, Catherine A. O’Connor, Director of Engineering, WSS:KMF
Recommended, Darlene A. LoCascio, Director of Procurement and Materials Management
Respectfully Submitted, Barbara J. McGowan, Chairman Committee on Procurement
Disposition of this agenda item will be documented in the official Regular Board Meeting Minutes of the Board of Commissioners for August 6, 2020
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