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PUBLIC WORKS- Director James Simon
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Requested Action(s)
recommendation
a) CHANGE ORDER - Request approval and authorization for the Director to issue Change Order No. 18 to the Agreement with S.T. Rhoads Inc. (Road Agreement #2024-03) for the 99W & South Main Street Project, to delete Bid Item #49-Replace AC Surfacing and Bid Item #140-Replace AC Surfacing and reconstruct the roadway using an alternative structural section to address unforeseen unsuitable subgrade conditions, in an amount equal to $480,389.60
And (in the event the terms of the current CCO #18 as written are not acceptable to the Contractor);
b) Request authorization for the Director to proceed with the unsuitable soil mitigation work described in the attached draft CCO #18 memorandum, Reason for Change, and to negotiate the terms of the contract change order
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Financial Impact:
The Construction (CON) phase of this project is funded by a combination of Federal and State funds comprised of CMAQ, DEMO, SHOPP, STIP, HIP and RSTP. This project contract is budgeted in Road Fund - Professional and Special Services #3011-53230. The Board awarded the contract for the 99W & South Main Street Project, Federal Project No. RRSTPL 5908(100), County Project No 2708181 to S.T. Rhoads Inc. as the low responsive bidder in the amount of $14,499,406.50 on March 26,2024 (Road Agreement #2024-03). A 15% contingency, in the amount of $2,213,743.50 was budgeted to the construction contract to address Contract Change Orders and is reimbursable through the project funding. At that time, the Director of Public Works was authorized $210,000 in signature authority for the issuance of Change Orders to the contract, pursuant to Public Contract Code 20405(d)(3). Approval of this Change Order would leave a remaining contingency budget of $1,145,912.40.
Background Information:
The plans call for South Main Street to be reconstructed. However, the underlying subgrade is partially composed of saturated clay soil that will not be suitable for supporting the construction loads during the resurfacing operations. In addition, some areas of the finished grade of the roadway are to be lowered by up to 5-inches to correct the existing profile and cross-slope. Upon discovery of unsuitable material in the vicinity of the roundabout, the southerly portion of roadway was potholed and soil samples taken for analysis. Based on the analysis results, unsuitable soil conditions are expected to be encountered in several locations. An alternative structural section has been developed to provide the planned pavement design life for the given traffic index. Where no saturated clay subgrade is found, and grade corrections are not required, the AC surfacing will be replaced per plan. Caltrans and the City of Red Bluff concur with this mitigation method and Caltrans agrees with its eligibility for reimbursement.
Attachment List:
Contract Change Order #18 Memorandum
Contract Change Order #18, sheet 1
Contract Change Order #18, sheets 2-5 (plan sheets)