| | | | | | | | Agenda Item - 3.j.
City of Garden Grove
INTER-DEPARTMENT MEMORANDUM
| To: | Lisa L. Kim
| From: | William E. Murray
| | Dept.: | City Manager
| Dept.: | Public Works
| | Subject: | Approval of Amendment No.1 to an Agreement with Ardurra Group Inc., to provide professional engineering services for the Phase II Repair and Rehabilitation Water Storage Reservoirs Project. (Cost: $155,355) (Action Item) | Date: | 9/26/2023 |
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| | | | | | | | OBJECTIVE
To request City Council approval of Amendment No.1 to an agreement with Ardurra Group Inc., to provide professional engineering services for repair and rehabilitation of four (4) partially buried reservoirs. |
| | | | | | | | BACKGROUND
The City’s Water Services Division contracted with Ardurra Group Inc., for the design of repair and rehabilitation of four (4) partially buried reservoirs. Original design scope was based on the 2013 Reservoirs Condition Assessment that was completed by Simon Wong Engineering. The Reservoirs Condition Assessment included structural and seismic assessment, corrosion assessment, and mechanical and security assessment and it provided lists of recommended repairs and rehabilitation for each reservoir with prioritization. |
| | | | | | | | DISCUSSION
During the preliminary design process, Ardurra Group Inc., performed visual inspections and seismic analysis of the four (4) partially buried reservoirs and identified additional repairs and rehabilitation works that are not included in the original scope. To comply with the current building code and improve reservoir site security, these additional findings need to be added to the final design. The additional design services include but not limited to reservoir seismic improvements, installation of new cathodic protection systems, and installation of intrusion alarms on the existing reservoir hatches. An amendment to the existing agreement is required to include fees for the additional design services, from $399,738 to $555,093, an increase of $155,355. The amendment will ensure Ardurra Group Inc., can provide the additional design services required for the Repair and Rehabilitation of Water Storage Reservoirs-Phase II project. |
| | | | | | | | FINANCIAL IMPACT
There is no impact to the General Fund. The project is included in the Water Utility fund's current capital improvement project budget, and the Water Utility fund will be paying the additional cost in the amount of $155,355. |
| | | | | | | | RECOMMENDATION
It is recommended that the City Council:
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Approve Amendment No.1 to the existing agreement with Ardurra Group Inc., for professional engineering services in the amount of $155,355; and
- Authorize the City Manager to execute Amendment No.1 to the agreement on behalf of the City, and make minor modifications as appropriate thereto.
By: Liyan Jin, Associate Engineer
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