C7AL - Approve Star Island Force Main Change

Resolutions - C7 AL

C7 AL A RESOLUTION OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, APPROVING AND AUTHORIZING THE CITY MANAGER TO EXECUTE CHANGE ORDER NO. 1 TO CONSULTANT SERVICE ORDER NO. 33 WITH HAZEN AND SAWYER, P.C., ISSUED UNDER REQUEST FOR QUALIFICATIONS (RFQ) NO. 2022-122-ND FOR ENGINEERING SERVICES FOR WATER AND WASTEWATER SYSTEM PROJECTS, IN CONNECTION WITH THE STAR ISLAND FORCE MAIN REPLACEMENT PROJECT; SAID CHANGE ORDER NO. 1 PROVIDING FOR ADDITIONAL DESIGN SERVICES, INCLUDING RISK ANALYSIS, CONSTRUCTABILITY REVIEW, AND ALTERNATIVES ANALYSIS, AND INCREASING THE ORIGINAL SERVICE ORDER AMOUNT BY $89,541.00, FROM A TOTAL NOT-TO-EXCEED AMOUNT OF $639,864.00 TO A REVISED TOTAL NOT-TO-EXCEED AMOUNT OF $729,405.00​.​ Applicable Area:

COMMISSION MEMORANDUM

RECOMMENDATION

The Administration recommends approving the Resolution.

BACKGROUND/HISTORY

On March 18, 2020, the Mayor and City Commission (City Commission) adopted the City’s Five- Year Water and Sewer Critical Needs Capital Plan, which identified the Star Island Force Main as a high-priority infrastructure replacement project due to its age, lack of redundancy, and critical role in conveying wastewater from Star, Palm, Hibiscus, and Terminal Islands to the City’s wastewater collection system.

On January 18, 2023, the City entered into an agreement with Hazen and Sawyer, P.C. (Hazen), pursuant to RFQ No. 2022-122-ND, for engineering services for water and wastewater system projects. This agreement was competitively procured and structured to support the City’s ongoing capital improvement needs on an as-needed basis.

On October 18, 2023, the City Commission approved Resolution No. 2023-32-814 to proceed with Service Order No. 33 with Hazen, in the amount of $639,864.00, to prepare a Design Criteria Package (DCP) and provide related engineering services for the replacement of the aging subaqueous force main. The existing 10-inch force main, originally installed over 65 years ago, is located beneath Biscayne Bay and has exceeded its useful life. The project’s goal is to replace the existing pipeline with a new 16-inch force main to improve system reliability, reduce the risk of failure, and increase capacity to accommodate additional demand from Terminal Isle.

The Star Island Force Main is a vital, non-redundant component of the City’s wastewater collection system, serving multiple residential islands and conveying flow beneath Biscayne Bay. Given its age, strategic location, and lack of backup infrastructure, the replacement of this force main is essential to maintaining system reliability, protecting public health, and avoiding costly emergency repairs or environmental impacts.

ANALYSIS

The original design concept proposed the use of a Horizontal Directional Drilling (HDD) method to replace the existing Force Main through a narrow 5-foot easement located between the properties with addresses 33 and 34 Star Island. However, during the early stages of the development of conceptual design plans, Hazen identified significant constructability concerns and risks associated with this approach, triggered, in part, by the construction of a new house on 34 Star Island.

Hazen conducted a comprehensive risk analysis and constructability review, including the development of a formal Risk Register, updated cost estimates, and a revision for the Design Criteria Package (DCP) for alternative installation methods. These included a hybrid HDD/Microtunnel (MT) approach and a Novel Conductor Casing (NCC) installation method using retractable micro-tunneling or guided auger boring. These alternatives were evaluated for feasibility, cost, and risk mitigation, and were found to offer a safe and more constructible solution.

The services included in change order No. 1 are critical to ensure the City can proceed with a safe, constructible, reliable, and cost-effective solution for replacing this aging and non-redundant wastewater force main.

The work to be performed under change order No. 1 aims to field locate the existing force main to avoid damages during construction, assess the alternative construction methodologies, and will directly inform the procurement of a qualified design-build firm of the findings, reducing the risk of costly delays or redesign during construction.

The revised scope of services (Attachment A) increases the total not-to-exceed amount by $89,541.00, for a Service Order total of $729,405.00. Public Works staff has reviewed the scope of work and finds it fair and reasonable. This investment is essential to protect public infrastructure, reduce the risk of service disruption, and maintain regulatory compliance.

The approval of change order No. 1 will help safeguard the City’s infrastructure investment, reduce long-term operational risks, and maintain momentum on a project that is central to the City’s Five-Year Water and Sewer Critical Needs Capital Improvement Plan. Therefore, the Administration strongly recommends approval of change order No. 1 to maintain the project momentum and safeguard the City’s wastewater system.

FISCAL IMPACT STATEMENT

$68,533.03 418-0815-061357-29-418-561-00-00-00-28520 Design-Capital Contracts $21,007.97 417-0815-061357-29-418-000-00-00-00-28520 Design-Capital Contracts

Does this Ordinance require a Business Impact Estimate? (FOR ORDINANCES ONLY)

If applicable, the Business Impact Estimate (BIE) was published on: See BIE at: https://www.miamibeachfl.gov/city-hall/city-clerk/meeting-notices/

FINANCIAL INFORMATION

Change Order No.1 increases the Service Order cost by $89,541.00, for a total not-to-exceed Service Order cost of $729,405.00. This project is funded through the City’s Five-Year Water and Sewer Critical Needs Capital Improvement Plan.

CONCLUSION

The Administration recommends approving the Resolution.

Applicable Area

South Beach

Was this Agenda Item initially requested by a lobbyist which, as defined in Code Sec. 2-481, includes a principal engaged in lobbying? No

If so, specify the name of lobbyist(s) and principal(s):

Department

Public Works

Sponsor(s)

Co-sponsor(s)

Condensed Title

Approve Change Order 1 - Hazen & Sawyer, Star Island Force Main Replacement Project. PW