TRANSMITTAL LETTER FOR BOARD MEETING OF NOVEMBER 1, 2012
COMMITTEE ON PROCUREMENT
Mr. David St. Pierre, Executive Director
Title
Authority to increase Contract 06-023-3P Stop Logs and Diversion Pumps at Wilmette Pump Station and Evanston Pump Station Rehabilitation, North Service Area, to F.H. Paschen/S.N. Nielsen in an amount of $49,556.15, from an amount of $17,580,682.83, to an amount not to exceed $17,630,238.98, Accounts 101-50000-612620, 401-50000-645620 and 645720, Purchase Order 5001266
Body
Dear Sir:
On July 14, 2011, the Board of Commissioners authorized the Director of Procurement and Materials Management to award Contract 06-023-3P Stop Logs and Diversion Pumps at Wilmette Pump Station and Evanston Pump Station Rehabilitation, North Service Area, to F.H. Paschen/S.N. Nielsen, in an amount not to exceed $17,440,000.00. The scheduled contract completion date is September 29, 2013.
As of October 19, 2012, the attached list of change orders has been approved. The effect of these change orders resulted in an increase in an amount of $140,682.83 from the original amount awarded of $17,440,000.00. The current contract value is $17,580,682.83. The prior approved change orders reflect a 0.81% increase to the original contract value.
During design, the consultant estimated the sediment in tunnels 2 through 4 to be twelve to eighteen inches deep. This estimate was made with the understanding that the tunnels were sealed by existing flap gates. However, after the tunnels were dewatered during construction, it was determined in the field that the existing flap gates were partially open allowing sediment from the channel to enter the tunnels during high flow events. Since the tunnels were submerged at the time of design, and since the inspection by a diver of tunnels 1 and 2 was inconclusive due to visual interference by the pump shafts and impellers, the quantities of sediment to be removed differed considerably from the estimate provided in the bid documents. In order to continue with work on the contract, it was imperative that the additional sediment found in the tunnels be removed. The contractor submitted a cost proposal (CCO-008) for an extra in the amount of $49,556.15 for removal of the excess sediment. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence 346, 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 is 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 06-023-3P in an amount of $49,556.15 (0.28% of the current contract value), from an amount of $17,580,682.83, to an amount not to exceed $17,630,238.98.
Funds are available in Accounts 101-50000-612620, 401-50000-645620 and 645720.
Requested, Catherine A. O'Connor, Director of Engineering, MVL:ECB
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 November 1, 2012
Attachment