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Placentia City Council
AGENDA REPORT
CITY COUNCIL
CITY ADMINISTRATOR
DEPUTY CITY ADMINISTRATOR / PUBLIC SERVICES & INFRASTRUCTURE FEBRUARY 7, 2023
SUBJECT: AMENDMENT NO. 2 TO PROFESSIONAL SERVICES AGREEMENT WITH
DUDEK CORPORATION FOR ENGINEERING DESIGN SUPPORT SERVICES
FOR THE TOD CROWTHER SEWER PIPELINE REPLACEMENT PROJECT FISCAL
IMPACT: EXPENSE: $ 42,600.00 ENGINEERING DESIGN SERVICES
AVAILABLE
BUDGET: $ 343,358.00 FY 2022-23 CIP PROJECT BUDGET (713101-6750) SUMMARY:
The development of the City's Transit -Oriented Development ("TOD") Packinghouse District requires upgrading the existing sewer line in Crowther Avenue to provide adequate capacity for all the new planned developments along Crowther Avenue. Dudek Corporation (Dudek) completed the design of the TOD Crowther Sewer Pipeline Project ("Project") and on November 16, 2021, City Council approved a construction contract with the low -bidder, Kana Pipeline Inc., and a contract with Dudek for providing engineering support services during the construction of the Project. Since the start of construction in January of 2022, Dudek has been reviewing submittals, answering Requests for Information, reviewing schedules and change orders, in addition to resolving many design and unforeseen construction issues.
On July 5, 2022, the City Council approved Amendment No. 1 in the amount of $32,255 to increase Dudek's contract amount for performing engineering services on many ongoing design changes. Due to the nature of the project with the sewer line crossing many existing utilities, some of which were found to be abandoned without any past records, the Contractor had to change the sewer alignment many times. This required Dudek to check and review various options for re- routing the sewer line. In addition, Dudek had to perform additional engineering calculations to ensure that the overall design of the pipeline and capacity remains the same as the original design. In addition, the sequence of the construction was changed due to conflicts with the contractors working on street improvement work within the City of Fullerton. As a result, Kana Pipeline had to change the sequence of construction and it became essential for Dudek to check and evaluate the plans to ensure that the revisions are acceptable, and the design would be compatible with the new alignments. The proposed Amendment No. 2 in the not -to -exceed amount of $42,600 is necessary for Dudek to continue with supporting the project and to handle the ongoing and future construction issues throughout the remainder of the project duration.
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Feb 07, 2023
City Council Agenda
February 7, 2023
RECOMMENDATION:
It is recommended that the City Council take the following actions:
1. Approve Amendment No. 2 to Professional Services Agreement with Dudek Corporation for an additional $42,600 to complete additional design work for a cumulative contract not - to -exceed amount of $114,855; and
2. Authorize the City Administrator and/or his designee to execute all the necessary documents, in a form approved by the City Attorney.
STRATEGIC PLAN STATEMENT
There is no specific 5 -Year Strategic Plan Goal or Objective associated with the recommended actions.
DISCUSSION:
The existing sewer line serving the Transit -Oriented Development (TOD) District requires upgrading to provide adequate sewer capacity for the new developments along Crowther Avenue.
Along with a construction contract to Kana Pipeline, on November 16, 2021, the City Council also approved a contract with Dudek for providing engineering support services during the construction of the TOD Crowther Sewer Project. Dudek was the original designer for the TOD Crowther Sewer Pipeline Project. Dudek has actively been resolving the design changes on many unforeseen conditions that were encountered since the beginning of the construction.
Some of the conditions that required Dudek to perform additional engineering design include multiple realignment of the sewer line and changing the sequence of construction due to conflicts with multiple existing utilities. After the initial potholing for identifying existing utilities, the contractor found that the invert elevations for the new sewer conflicted with the Orange County Sanitation Districts' (OCSD) trunkline. The Contractor conducted 12 potholes in the intersection to support investigating the realignment. Dudek had to analyze the original design to ensure that the design of the new gravity sewer line would work with the new elevations at the OCSD connection point. In addition, the Contractor could not start work at State College, due to conflict with ongoing work by contractors working on street improvements for the City of Fullerton within the same vicinity. As such, the contractor had to start work upstream of the connection point to OCSD. Dudek had to perform design evaluations to ensure that the new phasing plan for contractor to start work upstream of the connection point would work with the new elevations that were obtained using the potholing information. As a result, Kana Pipeline had to change the sequence of construction and it became essential for Dudek to check and evaluate the plans to ensure that the revisions are acceptable, and the design would work with the new alignments.
Other design work to address utility conflicts in the field included coordination with active waterlines. Dudek had to obtain confirmation from Golden State Water and Department of Drinking Water (DDW) to update the DDW variance and to get approval on the sewer alignments near waterlines. In early August 2022, the Contractor discovered a 6" high pressure gas pipeline,
City Council Agenda
February 7, 2023
which was too close to the new sewer pipeline alignment. Work had to stop to address this issue and Dudek had to assist with developing a detailed design and preparation of variance letters to SoCaI Gas to allow the new sewer pipeline to be constructed under the existing gas pipeline.
SoCal Gas accepted the detail and allowed completion of the work. Again in late August, 2022, while potholing for existing utilities, along Crowther Avenue at the Melrose intersection, an existing 4" gas pipeline and a 10" waterline were found to be in conflict with the new sewer pipeline alignment. A series of potholes were completed in early September 2022 to allow the redesign of the sewer through the Melrose intersection.
On July 5, 2022, the City Council approved Amendment No. 1 in the amount of $32,255 to increase the Dudek's contract amount for performing engineering services on many ongoing design changes. Due to many changes that had to be re-evaluated by Dudek, additional funding is needed to carry the project to completion. This proposed Amendment No. 2 will provide additional funding for Dudek to continue with engineering support services and to assist with performing necessary engineering design evaluations and resolving any unforeseen construction issues for the balance of the project. Construction of this project is currently scheduled to be completed in April.
FISCAL IMPACT:
The recommended actions will approve Amendment No. 2 to the Professional Services Agreement with Dudek increasing the contract amount by $42,600, for a cumulative not -to -exceed the contract amount of $114,855. A total amount of 343,358 is available and budgeted within the Fiscal Year (FY) 2022-23 CIP Budget for the TOD/Crowther Sewer Line Replacement Project. As such, sufficient funds exist for the recommended actions.
Prepared by: Review- • and . . proved:
Masoud ' epahi
City En• n-er
Reviewed and approved:
Jerinffer Lampman
Director of Finance
Luis Estevez
Deputy City Administrator
Reviewed and approved:
Darfrien--W-; rrula
City Administrator
Attachments:
1. Dudek Proposal for Construction Support Services dated September 21, 2022
2. Amendment No. 2 to Professional Services Agreement with Dudek Corporation