DATE: December 18, 2024
TO: Honorable Mayor and City Councilmembers
FROM: City Manager's Office
TITLE: AMENDMENT 1 TO THE PROFESSIONAL SERVICES AGREEMENT WITH GHD INC. FOR THE PHASE 2 SAND NOURISHMENT AND RETENTION PILOT PROJECT (RE:BEACH)
RECOMMENDATION
title
Staff recommends that the City Council approve Amendment 1 to the Professional Services Agreement with GHD Inc., in the amount of $697,109, for a total revised contract price of $3,288,790, for the Phase 2 Sand Nourishment and Retention Pilot Project (RE:BEACH); and authorize the City Manager to execute the amendment upon receipt of all supporting documents.
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BACKGROUND AND ANALYSIS
In 2020, the City conducted a year-long preliminary engineering evaluation and Feasibility Study to identify deficiencies in current coastal management actions as well as to determine a suite of solutions to lessen long-term beach erosion and mitigate the effects of the Harbor Complex. The Feasibility Study (Phase 1) concluded that 1) a high-quality source of sand, coupled with a beach nourishment program, should be 2 identified to provide more efficient and consistent beach nourishment opportunities, and 2) retention structure(s) are desirable as a means of retaining placed sand, since historical surveys and anecdotal data have shown that placed sand does not persist on most of Oceanside’s beaches. At an August 2021 Public Workshop, the City Council provided staff direction to pursue the recommendations given in Phase 1. Specifically, staff was directed to move forward with the environmental analysis, design, and permitting of a Phase 2 pilot project that would provide both beach nourishment and sand retention options.
On January 25, 2023, the City Council approved a contract with GHD Inc. (GHD) related to Phase 2 of the City’s Sand Nourishment and Retention Pilot Project (Attachment 3). The main tasks outlined in the Phase 2 scope included:
• Community and Stakeholder Engagement
• Baseline Monitoring Development
• Engineering, Analysis and Design
o Final Design and Engineering
o Plans and Specifications
• Environmental Compliance and Permitting
To achieve an innovative sand retention concept that would provide the community with multiple benefits that extend beyond sustaining a sandy shoreline, the City hosted an eight-month long international public design competition, called RE:BEACH Oceanside Coastal Resilience Design Competition. Following the completion of the Design Competition, the City Council held a public workshop on January 31, 2024, approved the Jury recommended selection of the “Living Speed Bumps” concept, provided guidance and recommendations on next steps, and authorized City staff and GHD Inc., the prime consultant, to proceed with the subsequent stages of design, engineering, and environmental compliance of Phase 2 of the Oceanside Sand Nourishment and Retention Pilot Project.
On November 20, 2024, the City Council approved Segment 1 as the siting location of the pilot project, with the two headlands expected to be constructed at Tyson Street Park and at Wisconsin Avenue and an artificial reef constructed offshore between the two headlands.
The requested additional scope and funding in this Amendment represents the estimated scope and costs to continue to progress the pilot design through enhanced engineering and modeling that is necessary for optimum final design. Grant funding and philanthropic funding has been identified for some additional tasks, such as heightened baseline monitoring, that are also necessary for the pilot project implementation. Typically project soft costs (engineering, environmental/permitting) are approximately 10% of total construction costs for complex projects in the California coastal zone. As construction costs are currently estimated between $30-50 million, soft costs can be anticipated in the $3-5 million range.
Below is a brief overview of the additional efforts proposed to complete the associated tasks for engineering design and environmental compliance under the Phase 2 contract.
Task 4. Engineering, Analysis & Design
o Sand Bypass - Project Advocacy / Sand Delivery System Feasibility Study:
This Task is reorganized to focus on a Sand Delivery System Feasibility Study. This study will evaluate the feasibility of a sand transport and delivery system along the Oceanside shoreline. The goal would be to evaluate options and mechanisms for moving sand from the harbor with distribution points along all of Oceanside’s shoreline, emphasizing challenges and opportunities for getting sediment as far south as feasible.
o Landscape Architecture and Programming: Based upon feedback during the Design Competition and Siting Analysis, additional focus is needed on integrating the pilot project into the existing character and features along the Oceanside coastline. The main parameters for the headlands (i.e., general size, shape, available space) needs to be determined, followed by a review of City needs, such as lifeguard and maintenance access. After developing a thorough understanding of the required City use of the space, the project team will work with landscape architecture professionals to develop potential scenarios for programming, features, and amenities on the headlands.
o Enhanced Numerical Modeling: More robust numerical modeling is needed to better understand the interconnectivity between the design of the reef (shape, size, orientation, distance from shore, etc.) and morphological response of the shoreline. As a structure intended to buffer wave energy approaching the shore, additional hydrodynamic modeling (shoaling, wave breaking, current/rip currents, etc.) is necessary to ensure the reef is designed to minimize potential safety concerns and maximize performance as a sand retention feature. Additionally, enhanced numerical modeling will help illustrate the shoreline response to waves hitting various configurations of the reef, which will help identify the optimal reef design for lessening potential impacts to surf amenities.
o Plans, Specifications & Estimate (PS&E): Due to the complexities introduced by the reef in the winning RE:BEACH concept, a more extensive engineering effort is required to properly design the pilot project. As the details of the reef will be refined through comprehensive numerical and potentially physical modeling, the engineering design will demand more resources and effort than initially anticipated planned before the Design Competition.
FISCAL IMPACT
Funding source is 1) the American Rescue Plan Act (ARPA) Sand Replenishment Account, which has a sunset date of December 31, 2027 and requires funds to be encumbered by December 31, 2024, and 2) the Beach Restoration account.
|
Task Descriptions |
Amount |
Account |
Available Balance |
|
Sand Bypass Advocacy & Feasibility Study |
$23,631 |
Sand Replenishment Account (ARPA) 837134221271.5305 |
$523,823 |
|
Enhanced Numerical Modeling |
$344,568 |
|
|
|
Landscape Architecture and Programming |
$50,000 |
|
|
|
Plans, Specifications, & Estimate (PS&E) |
$105,624 |
|
|
|
|
$173,286 |
Beach Restoration Account 912134224501.5305 |
$227,064 |
|
Amendment 1 Total |
$697,109 |
COMMISSION OR COMMITTEE REPORT
Does not apply.
CITY ATTORNEY’S ANALYSIS
The referenced documents have been reviewed by the City Attorney and approved as to form.
end
Prepared by: Jayme Timberlake, Coastal Zone Administrator
Submitted by: Jonathan Borrego, City Manager
ATTACHMENTS:
1. Staff Report
2. Amendment 1
3. Exhibit A