TRANSMITTAL LETTER FOR BOARD MEETING OF NOVEMBER 17, 2022
COMMITTEE ON PROCUREMENT
Mr. Brian A. Perkovich, Executive Director
Title
Authority to increase Contract 15-830-3D Replacement of Tailrace Stop Logs, Headrace Gates, and Equipment at Lockport Powerhouse, Stickney Service Area, to IHC Construction Companies, L.L.C., in an amount of $530,533.05, from an amount of $13,228,978.77, to an amount not to exceed $13,759,511.82, Account 401-50000-645720, Purchase Order 4000070 (As Revised)
Body
Dear Sir:
On June 6, 2019, the Board of Commissioners authorized the Director of Procurement and Materials Management to award Contract 15-830-3D Replacement of Tailrace Stop Logs, Headrace Gates, and Equipment at Lockport Powerhouse, Stickney Service Area, to IHC Construction Companies, L.L.C., in an amount not to exceed $12,075,000.00, plus a five (5) percent allowance for change orders in an amount of $603,750.00, for a total amount not to exceed $12,678,750.00. The scheduled contract completion date was December 10, 2021.
As of November 4, 2022, the attached list of change orders has been approved.
Original Contract Amount $12,075,000.00
Date of Board Approval 6/6/2019
Cumulative Change Order (11/4/2022) $1,153,978.77
% Change of Original Contract Value 9.56%
Current Contract Value $13,228,978.77
Requested Increase $530,533.05
New Contract Value $13,759,511.82
% Change of Current Contract Value 4.01%
Total % Change of Original Contract Value 13.95%
Item 1: An extra in the amount of $1,100.12 is necessary to repair the damage of two (2) #250 MCM bare copper grounding wires outside of the Lockport Powerhouse. During construction, existing direct buried grounding wires were damaged and severed during excavation of the pavement outside of the Lockport Powerhouse. Since these wires were not shown on the original contract drawings, an inquiry was made for directions on how to proceed with the repairs. Subsequently, a request for proposal (RFP) was issued and the contractor’s electrical subcontractor was unresponsive. Therefore, the engineer issued a revised RFP for materials only, which will be turned over and installed by District trades. The contractor accepted the engineer’s counterproposal, and the engineer stated, via correspondence CO15, that the Engineering Department would recommend its approval.
Item 2: A credit in the amount of $159,698.37. This contract includes two temporary cofferdams to permit phased construction of an elevated tailrace platform for Bays 1 and 2. Upon dewatering of the Phase 1 cofferdam in October 2020, it was discovered that substantial water was entering the coffered area through voids under the existing Powerhouse and fissures in the rock substrate. The contractor submitted a cost proposal (COR-04) for an extra in an amount not to exceed $920,932.03 for a seal slab, pressure grouting and pumping to control leakage into the Phase 1 cofferdam. The COR was approved on February 18, 2021, by the Board of Commissioners, and the extra work was tracked via Time and Material Daily Record (TMDR) for payment on a time and material basis. The extra work was completed at an actual cost of $761,233.66, and it is requested that the remaining $159,698.37 balance be credited to close out this change order.
Item 3: An extra in an amount not to exceed $689,131.30 to manage water infiltration in the Phase 2 cofferdam. It is anticipated that a seal slab, pressure grouting, and additional pumping may also be necessary to control water infiltration in the Phase 2 cofferdam, which is currently under construction. The contractor submitted a cost proposal (COR-16) for an extra in an amount not to exceed $689,131.30 for performing the Phase 2 extra work. The proposal includes $255,433.88 for installation of a seal slab, $178,124.15 for up to 15 days of pressure grouting, and $255,573.27 for up to 56 days of pumping. The need for a seal slab and quantities of extra pressure grouting and pumping are currently unknown; therefore, all extra work will be tracked via TMDRs for payment on a time and materials basis. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence CO16, that the Engineering Department would recommend its approval.
The above three change orders are in compliance with the Illinois Criminal Code since the changes are 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 three change orders to increase Contract 15-830-3D in an amount of $530,533.05 (4.01% of the current contract value), from an amount of $13,228,978.77, to an amount not to exceed $13,759,511.82.
Funds are available in Account 401-50000-645720.
Requested, Catherine A. O’Connor, Director of Engineering, GMR:GRR
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 17, 2022
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