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VIDEO. From the OneShoreline (San Mateo County Flood and Sea Level Rise Resiliency District) meeting on Monday, September 28th, 2026. Agenda. Staff report for Item #4A: “That the San Mateo County Flood and Sea Level Rise Resiliency District (“OneShoreline”) Board of Directors (“Board”) authorize the CEO to: 1) execute a Feasibility Cost Sharing Agreement with the U.S. Army Corps of Engineers (“USACE”) for the federal Sewer Authority Mid-Coastside (“SAM”) Water Treatment Plant Flood Risk Management Project, for which OneShoreline will serve as a Non-Federal Sponsor, and 2) work with OneShoreline staff to submit any related documents required for the Agreement.” Board members.

Half Moon Bay Mayor, Debbi Ruddock, SAM Director and OneShoreline Board Member, reports out regarding the OneShoreline meeting earlier in the day.
OneShoreline Approves Contractor to Secure Army Corp Funding for Sewer Authority Mid-Coastside Flood Resiliency after 2022 Flooding of the Electrical Room; January 30, 2025
Sewer Authority Models 2022 New Years Storm as Part of the “SAM Facility Vulnerability Study” Hydrodynamic Flood Modeling; March 30, 2023
Sewer Authority Approves Funding for Integral Consulting to do a Facility Flood Hazard Model for Neighboring Pilarcitos Creek and the Kehoe Channel; September 1, 2022
More on OneShoreline on Coastside Buzz
More on Granada Community Services District on Coastside Buzz
More on Montara Water and Sanitary District on Coastside Buzz
Sewer Authority Mid-Coastside (SAM) Meetings ~ 2nd & 4th Mondays @ 7:00pm
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Contact Us
Our regular office hours are 7:00 a.m. through 4:00 p.m., Monday through Friday, excluding holidays. The Authority can be reached 24-hours a day at: (650) 726-0124.
Our Address is:
Sewer Authority Mid-Coastside
1000 Cabrillo Hwy N.
Half Moon Bay, CA 94019

SAM Board from left. Paul Nagengast (HMB), Nancy Marsh (GCSD), Scott Boyd (MWSD), Debbie Ruddock (HMB), Barbara Dye (GCSD), Kathryn Slater-Carter (MWSD).
The Sewer Authority Mid-Coastside (SAM) provides wastewater treatment services and contract collection maintenance services for a population of approximately 24,000 in the following areas:
- City of Half Moon Bay
- El Granada
- Miramar
- Montara
- Moss Beach
- Princeton by the Sea
SAM Directors
SAM is a joint powers authority (JPA) created by its three member agencies: City of Half Moon Bay (City), Granada Community Services District (GCSD), and the Montara Water and Sanitary District (MWSD).
The JPA is a separate, independent, public agency created by the member agencies to perform functions and share powers common to the member agencies. Those powers are outlined in a joint exercise of powers agreement (Agreement). The Agreement creating SAM can be found on the Documents page.
Each Agreement identifies how the independent agency will be governed. In the case of SAM, each member agency appoints two members from its governing board to represent it on the SAM Board of Directors, for a total of six directors.
The Agreement also establishes the weight of each director’s vote. The vote by each representatives from the City is given the weight of two votes. The vote by each representative from GCSD and MWSD is given the weight of one vote. The total number of possible votes is eight. A quorum is a minimum of five votes and resolutions require at least six votes to pass.
2026 SAM Directors
Kathryn Slater-Carter ~ Chair, Representing the Montara Water & Sanitary District
Nancy Marsh ~ Vice Chair, Representing the Granada Community Services District
Paul Nagengast ~ Secretary/Treasurer, Representing the City of Half Moon Bay
Deborah Ruddock ~ Director, Representing the City of Half Moon Bay
Barbara Dye ~ Director, Representing the Granada Community Services District
Scott Boyd ~ Director, Representing the Montara Water & Sanitary District



