TRANSMITTAL LETTER FOR BOARD MEETING OF July 11, 2024
COMMITTEE ON PROCUREMENT
Mr. Brian A. Perkovich, Executive Director
Title
Authority to increase Contract 17-131-4FR McCook Reservoir Rock Wall Stabilization and Geotechnical Instrumentation, SSA, Re-Bid, to IHC Construction Companies, L.L.C. in an amount of $1,386,133.61, from an amount of $20,692,985.00, to an amount not to exceed $22,079,118.61, Account 401-50000-645630, Purchase Order 4000086
Body
Dear Sir:
On March 3, 2022, the Board of Commissioners authorized the Director of Procurement and Materials Management to award Contract 17-131-4FR McCook Reservoir Rock Wall Stabilization and Geotechnical Instrumentation, SSA, Re-Bid, to IHC Construction Companies, L.L.C., in an amount not to exceed $14,980,000.00. The scheduled contract completion date is September 4, 2024.
As of June 21, 2024, the attached list of change orders has been approved.
Original Contract Amount $14,980,000.00
Date of Board Approval 3/03/2022
Cumulative Change Order (6/21/2024) $5,712,985.00
% Change of Original Contract Value 38.14%
Current Contract Value $20,692,985.00
Requested Increase $1,386,133.61
New Contract Value $22,079,118.61
% Change of Current Contract Value 6.70%
Total % Change of Original Contract Value 47.39%
The purpose of Contract 17-131-4FR is to stabilize the near-vertical excavated rock perimeter highwalls of the McCook Reservoir along with installing instrumentation devices for monitoring geologic movements at the McCook Reservoir. Work has consisted of the installation of drain holes, rock bolts, rock dowels, cable bolts, chain link wire mesh, and shotcrete at locations where deemed necessary for the stability of the rock walls at the McCook Reservoir.
Item 1: As Stage 2 of the reservoir continues to be mined, field inspection of the rock wall conditions has identified additional rock stabilization required on the vertical highwalls that were not previously exposed when the contract was awarded. In addition, surface cleaning of the horizontal bench at the top of the rock wall, performed as part of the contract work, revealed additional locations where rock treatment is required. The evolving conditions related to the mining work require increased and/or decreased quantities of unit price items in order to complete the remaining recommended stabilization work.
The contractor accepted the engineer’s counter cost proposal (CO-08) for an extra in the amount of $2,925,347.96 and a credit in the amount of $1,556,387.00 for a net total in the amount of $1,368,960.96. The following list shows the quantity increased and/or decreased for each involved unit price item.
Unit Price Item 4: Stage 2 Reservoir Manual Scaling - 4,134.00 SY
Unit Price Item 5: Stage 2 Reservoir Type 1 Mechanical Scaling - (234.00 SY)
Unit Price Item 6: Stage 2 Reservoir Type 2 Mechanical Scaling - (296.00 SY)
Unit Price Item 7: Stage 2 Reservoir Type 1 #11 Grade 150 Rock Dowel - (9,914.00) LF
Unit Price Item 8: Stage 2 Reservoir Type 2 #11 Grade 150 Rock Dowel - 3,740.00 LF
Unit Price Item 9: Stage 2 Reservoir Structural Mesh - 1,512.00 SY
Unit Price Item 10: Stage 2 Reservoir Drain Holes - (640.00 LF)
Unit Price Item 11: Stage 2 Reservoir Type 1 #8 Structural Mesh Support Rock Dowel - 720.00 LF
Unit Price Item 12: Stage 2 Reservoir Rock Bench Crack Treatment, 0" to 3" Width - 3,187.00 LF
Unit Price Item 13: Stage 2 Reservoir Rock Bench Crack Treatment, 3" to 6" Width - 559.00 LF
Unit Price Item 14: Stage 2 Reservoir Rock Bench Crack Treatment, 6" or Greater Width - (673.00) LF
Item 2: The contract scope required the installation of instrumentation devices around Stage 2 of the McCook Reservoir for monitoring geologic movements of the rock wall. Upon installation, the instrumentation devices were not communicating with each other due to insufficient signal strength and possible interference attributed to the surrounding environment. As a result, an additional cellular modem was required to improve signal strength for the instruments to effectively communicate with each other.
The contractor submitted a counter cost proposal (CO-07) for an extra in the amount of $17,172.65 and a credit in the amount of $0.00 for a net total in the amount of $17,172.65. The engineer reviewed the proposal, found it to be reasonable, and stated via correspondence CO07 that the Engineering Department would recommend its approval.
The above two 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 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 two change orders to increase Contract 17-131-4FR, in an amount of $1,386,133.61 (6.70% of the current contract value), from an amount of $20,692,985.00, to an amount not to exceed $22,079,118.61.
Funds are available in Account 401-50000-645630.
Requested, Catherine A. O’Connor, Director of Engineering, KMF:LS
Recommended, Darlene A. LoCascio, Director of Procurement and Materials Management
Respectfully Submitted, Marcelino Garcia, 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 July 11, 2024
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