City Council Agenda
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Memo to: |
Manteca City Council |
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From: |
Michael Selling, Assistant Director of Engineering/City Engineer |
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Prepared by: |
Beshoy Demyan, Senior Engineer; Somporn Boonsalat, Deputy Director of Engineering |
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Date: |
March 3, 2026 |
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Subject: |
Approve Professional Services Agreement for the Project Approval and Environmental Document phase for the SR120/Airport Way and SR120/Main Street Diverging Diamond Interchange Projects and Approve a Budget Appropriation from the Public Facilities Implementation Plan (Fund 590) for CIPs 23031 and 23032 |
Recommendation:
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Adopt a resolution approving an Professional Services Agreement with Mark Thomas and Company, Inc. for the Project Approval and Environmental Document phase for the State Route 120 & Airport Way Diverging Diamond Interchange Project (CIP 23031) and the State Route 120 & Main Street Diverging Diamond Interchange Project (CIP 23032) for an amount not to exceed $3,600,000; Approve a Budget Appropriation of Public Facilities Implementation Plan Transportation funds (Fund 590) totaling $600,000 ($300,000 each) to CIPs 23031 and 23032; and authorizing the City Manager or designee to take all appropriate actions necessary to carry out the purpose and intent of the resolution.
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Background:
The City of Manteca (“City”), in cooperation with the California Department of Transportation (Caltrans), and the San Joaquin Council of Governments (SJCOG), proposes to develop two new Diverging Diamond Interchanges (“DDI”) at SR120/Airport Way and SR120/Main Street (“Projects”). The proposed Projects will widen the current two-lane overcrossings to six lanes with a raised median using a DDI design. A grade-separated Ribbon Path is also proposed to enhance bicycle and pedestrian access.
On March 2, 2023, the City approved Cooperative Agreements C-23-051 and C-23-052 with SJCOG allowing for disbursement of $500,000 in Measure K grant funding earmarked for regional congestion relief projects. Additionally, on March 14, 2023, the City approved agreement C2023-21 with Mark Thomas and Company, Inc., to develop the Project Study Reports (“PSR”) for a total not-to-exceed amount of $499,792.00.
On September 22, 2023, the City approved Cooperative Agreement 10-0570 and 10-0571 with Caltrans for project oversight for an amount not-to-exceed $60,000.
On April 14, 2025, Caltrans approved the PSR for the State Route 120/Airport Way DDI Project. On April 22, 2025, Caltrans approved the PSR for the State Route 120/Main Street DDI Project.
On June 3, 2025, the City approved Cooperative Agreements C-25-072 and C-25-073 with SJCOG allowing for disbursement of $3,000,000 in Measure K grant funding earmarked for regional congestion relief projects.
The City issued a Request for Proposals (“RFP”) on October 6, 2025, for Professional Services - Project Approval and Environmental Document (“PA&ED”) for both DDI Projects. Only one firm, Mark Thomas and Company, Inc. (“Mark Thomas”) submitted a proposal.
Staff completed negotiations with Mark Thomas to establish a Scope of Services to complete the PA&ED phase for the Projects for an amount not to exceed $3,600,000.
On October 21, 2025, the City approved Cooperative Agreement 10-0591 and 10-0592 with Caltrans for project oversight.
Fiscal Impact:
The previously appropriated $3,000,000 in Measure K grant funds, both DDI Projects CIPs 23031 and 23032 are included in the City’s Public Facilities Implementation Plan (PFIP).
Staff recommend Council approve the following:
1. Approve a Budget appropriation of $600,000 ($300,000 each) for the Route 120 & Airport Way Diverging Diamond Interchange Project (CIP 23031) and the State Route 120 & Main Street Diverging Diamond Interchange Project (CIP 23032) from PFIP Transportation funds (Fund 590).
2. Approve an Professional Services Agreement with Mark Thomas and Company, Inc. for the Project Approval and Environmental Document phase for the State Route 120 & Airport Way Diverging Diamond Interchange Project (CIP 23031) and the State Route 120 & Main Street Diverging Diamond Interchange Project (CIP 23032) for an amount not to exceed $3,600,000
The respective project funding breakdown for this PA&ED phase is as follows:
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Description |
Amount |
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Agreement C-25-072 SR120/Airport Way DDI PA&ED Phase (CIP 23031) |
$1,500,000 |
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Agreement C-25-073 SR120/Main Street DDI PA&ED Phase (CIP 23032) |
$1,500,000 |
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PFIP Transportation Fund 590 (CIP 23031) |
$300,000 |
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PFIP Transportation Fund 590 (CIP 23032) |
$300,000 |
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Total |
$3,600,000.00 |
Documents Attached:
1. Attachment 1 - Resolution
2. Attachment 2 - Project Location Map
3. Attachment 3 - Professional Services Agreement