What Does OneShoreline (San Mateo County Flood and Sea Level Rise Resiliency District) Do for Half Moon Bay? Sewer Plant, Poplar Dump “Clean Closure”, Stream Gauges…

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VIDEO and DOCUMENTS. From the Half Moon Bay City Council regular meeting on Tuesday, June 17th, 2025 at 7:00pm, as a hybrid meeting.  Agenda. OneShoreline.

1959: State legislation established the San Mateo County Flood Control District to address flooding challenges in several specific flood prone areas called “flood zones.”

2015: The County’s Civil Grand Jury issued a Report, “Flooding Ahead: Planning for Sea Level Rise,” that posed the question: What actions can the County of San Mateo, and the 20 cities and two relevant local special agencies within the county, take now to plan for sea level rise?” It answered this question by recommending “that a single organization undertake sea level rise planning on a countywide basis.”

2016: The County’s Department of Public Works established a Flood Resilience Program that developed a Memorandum of Understanding (MOU) to plan three potential projects: Bayfront Canal/Atherton Channel (MOU with Menlo Park, Redwood City, and Atherton); Belmont Creek (MOU with Belmont and San Carlos); and Navigable Slough (MOU with San Bruno and South San Francisco).

March 2018: The City/County Association of Governments (C/CAG) convened the “Floods, Droughts, Rising Seas, Oh My!” water summit, bringing together regional experts and policymakers to discuss San Mateo County water management challenges and opportunities. There, Congresswoman Jackie Speier identified the need for a countywide agency to address the challenges of flooding, sea level rise, and coastal erosion. This agency would allow San Mateo County and its 20 cities to: (1) coordinate the planning and implementation of projects across jurisdictional lines, which enables uniform levels of protection and the sharing of technical information and resources, and (2) create a broad and unified vision and voice that would position the new regional agency and its projects to obtain funding and regulatory permits.

April 2018: The City/County Association of Governments of San Mateo County (C/CAG) Countywide Water Coordination Committee began to develop a proposal to form a countywide agency to address sea level rise, flooding, coastal erosion, and regional stormwater infrastructure. After analyzing various potential approaches to the agency, the Water Coordination Committee recommended that new State legislation expand the mission, geographic reach, and governing Board of the 1959 San Mateo County Flood Control District. This legislation, Assembly Bill 825 (Mullin), was signed into law in September 2019.

January 1, 2020: The San Mateo County Flood and Sea Level Rise Resiliency District (OneShoreline) was born.


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Half Moon Bay City Council Meetings ~ 1st & 3rd Tuesdays @ 7:00pm

The City Council of Half Moon Bay is the City’s governing body, and consists of five elected members. The Council sets priorities and policies, makes final decisions on all major City matters, adopts ordinances and resolutions, appoints the City Manager and City Attorney, and approves the annual budget.

The Half Moon Bay City Council typically meets on the first and third Tuesday of each month starting at 7:00pm at the Ted Adcock Community Center, 535 Kelly Avenue.

HMB City Council Agendas and Zoom Links
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Special meeting agendas are posted 24 hours in advance.
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City Council Contact
Phone: (650) 726-8250 (leave message with Clerk’s office)

Mayor Robert Brownstone, District 1; Term ends 2026
RBrownstone@hmbcity.com 

Vice Mayor Debbie Ruddock, District 4; Term ends 2026
DRuddock@hmbcity.com

Councilmember Deborah Penrose, District 5, Term ends 2026
DPenrose@hmbcity.com

Councilmember Patric Bo Jonsson, District 2, Term Ends 2028
PJonsson@hmbcity.com

Councilmember Paul Nagengast, District 3; Term Ends 2028
PNagengast@hmbcity.com

The City of Half Moon Bay holds district-based elections for its five city council seats. Each Councilmember is elected to a 4 year term. There are no term limits in Half Moon Bay. The City Council selects one of its members to serve as Mayor and one to serve as Vice Mayor, on an annual basis.

  • November 2024 Election – Districts 2 and 3 will elect a representative to a four-year term.
  • November 2026 Election – Districts 1, 4, and 5 will elect a representative to a four-year term.

Click here to figure out which district you are in. Type your address into the interactive map and it will show you which district you are in.

Map 503b Adopted 3.15.2022

From left to right: Deborah Penrose, Debbie Ruddock, Robert Brownstone, Patric Jonsson and Paul Nagengast

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