TRANSMITTAL LETTER FOR BOARD MEETING OF FEBRUARY 2, 2023
COMMITTEE ON ENGINEERING
Mr. Brian A. Perkovich, Executive Director
Title
Authorization to increase payment for an intergovernmental agreement with the Illinois Department of Transportation for Conflict Manhole on Calumet 18B for IDOT Project 60Y72 (21-IGA-19) in an amount of $338,332.00, from an amount of $277,150.00, to an amount not to exceed $615,532.00, Account 201-50000-612400 (As Revised)
Body
Dear Sir:
On May 6, 2021, the Board of Commissioners granted authority to enter into an agreement and make payment to the Illinois Department of Transportation for Conflict Manhole on Calumet 18B for IDOT Project 60Y72 (21-IGA-19) in an amount not to exceed $277,150.00. The Illinois Department of Transportation (IDOT) as part of Contract 60Y72 will be reconstructing Wood Street, from North of the Little Calumet River to South of U.S. Route 6. The District has facilities in the vicinity of the project which includes Calumet Intercepting Sewer 18B which is in conflict with a proposed IDOT storm sewer. IDOT is proposing to construct a conflict manhole on Calumet Intercepting Sewer 18B to mitigate the conflict.
The reasons for the cost increase are:
• Overall increases in construction costs since May, 2021.
• The original cost estimate was based on preliminary design of the conflict manhole. During detailed design, it was determined a temporary soil retention system is needed to construct the conflict manhole due to its depth.
• During detailed design, it was also discovered that removal of unsuitable soil as special waste and special waste analysis is needed as part of the conflict manhole construction.
Upon award of the IDOT contract, the District will pay, via direct voucher, $492,425.00 or 80% of the cost estimate of $615,532.00. Upon completion and inspection of the work, the District will pay the remainder of the actual cost of the work not to exceed a total of $615,532.00. Should the actual cost of the work exceed that amount, an additional request to the Board of Commissioners will be made after review by the Engineering Department.
It is hereby recommended that the Board of Commissions authorize an increase payment for IDOT Project 60Y72 (21-IGA-19) in an amount of $338,332.00, from an amount of $277,150.00, to an amount not to exceed $615,532.00.
Funds are available in account 201-50000-612400.
Requested, Catherine A. O’Connor, Director of Engineering, KMF
Recommended, Brian A. Perkovich, Executive Director
Disposition of this agenda item will be documented in the official Regular Board Meeting Minutes of the Board of Commissioners for February 2, 2023