TRANSMITTAL LETTER FOR BOARD MEETING OF MARCH 20, 2025
COMMITTEE ON PROCUREMENT
Mr. Brian A. Perkovich, Executive Director
Title
Authority to increase Contract 73-161-EH McCook Reservoir Excavation Agreement, to Vulcan Construction Materials, LLC, in an amount of $2,487,293.00, from an amount of $115,370,234.25, to an amount not to exceed $117,857,527.25, Account 401-50000-645620, Purchase Order 5000176
Body
Dear Sir:
On October 1, 2003, the District executed an Agreement with Vulcan Construction Materials, LLC. to mine a portion of the Lawndale Avenue Solids Management Area for the McCook Reservoir, Contract 73-161-EH. On July 9, 2015, the Board of Commissioners authorized the execution of an amended McCook Reservoir Excavation Agreement that incorporated eight previous amendments, clarified and updated the original estimate, and expanded the mining area of Stage 2 so that the final reservoir capacity would be increased from 7 billion gallons to 10 billion gallons. The contract was estimated to be completed in 2028 at a cost of $93,710,394.23.
As of March 7, 2025, the attached list of change orders has been approved.
Original Contract Amount $93,710,394.23
Date of Board Approval 07/09/2015
Cumulative Change Orders (3/7/25) $21,659,840.02
% Change of Original Contract Value 23.11%
Current Contract Value $115,370,234.25
Requested Increase $2,487,293.00
New Contract Value $117,857,527.25
% Change of Current Contract Value 2.16%
Total % Change of Original Contract Value 25.77%
Item 1: As mining is progressing, it is necessary to relocate the Level 4 groundwater sump, groundwater pumping system, and piping to effectively complete mining of the reservoir. To allow mining to occur on the north wall of the reservoir for Levels 2, 3, and 4 in 2025, 2026, and 2027, the groundwater pumping system must be relocated from the north wall of the reservoir to the south wall and the discharge piping must be relocated to the upper rock bench of the south wall to discharge into Stage 1 of the McCook Reservoir. Also, a new 8-inch pipe will be purchased to function temporarily until the new Level 4 sump is operational. The contractor submitted a cost proposal for an extra to Item 8.3-9: Other- Groundwater Pumping System in the amount of $954,793.00 and a credit in the amount of $0.00, for a net extra in the amount of $954,793.00. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence to the contractor that the Engineering Department would recommend its approval.
Item 2: As mining is progressing, the McCook Reservoir highwalls require multiple scaling passes in order to safely mine along the highwall boundary. In order to maintain the latest mining plan, additional scaling efforts are required in 2025. The work includes labor and equipment to scale 1,812 horizontal feet of highwall along the pre-split line, 1,652 horizontal feet of 140 vertical feet of the Level 3 highwall, 2,280 horizontal feet of 210 vertical feet of the Level 4 highwall, and 2,080 linear feet for the Rock Conveyance Tunnel scaling. The contractor submitted a cost proposal for an extra to Item 8.13-13: Other - Highwall Inspection and Scaling, in an amount of $1,532,500.00 and a credit of $0.00, for a net extra of $1,532,500.00. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence to the contractor that the Engineering Department would recommend its approval.
These change orders are in compliance with the Illinois Criminal Code since the changes are germane to the contract.
It is hereby recommended that the Board of Commissioners authorize the Director of Procurement and Materials Management to execute these change orders to increase Contract 73-161-EH in an amount of $2,487,293.00 (2.16 percent of the current contract value), from an amount of $115,370,234.25, to an amount not to exceed $117,857,527.25.
Funds are available in Account 401-50000-645620.
Requested, Catherine A. O’Connor, Director of Engineering, KMF
Recommended, Darlene A. LoCascio, Director of Procurement and Materials Management
Respectfully Submitted, Precious Brady-Davis, Chairperson Committee on Procurement
Disposition of this agenda item will be documented in the official Regular Board Meeting Minutes of the Board of Commissioners for March 20, 2025
Attachment