Portreath Flood Resilience

The Environment Agency is looking at options to improve flood resilience for the people of Portreath.

Why is The Environment Agency concerned about Portreath?

The Environment Agency's 'Flood Risk Management Plan for England' helps us focus our efforts on the highest risk communities. Across England, 175 communities are designated as having a nationally significant level of flood risk to people, the economy or the environment. Portreath is one these communities, it is one of only three communities in Cornwall designated at highest risk from flooding.

Portreath Now

Flooded channel in Portreath following heavy rain

Currently the Portreath Stream flows through the 1km Portreath Tunnel and into the sea north of the village. During floods, lack of capacity in the tunnel causes excess flood water to flow into Portreath and flood properties. There are two issues with the tunnel:

  • It has limited capacity during a flood
  • It is difficult to access safely for maintenance and emergency works

To minimise flood risk to the community, the Environment Agency inspect the tunnel and debris screen, as well as monitoring water levels and issuing flood warnings. In 2024, we also invested in improvements to the debris screen as part of a national programme.


Portreath in the Future

Flooding is forecast to increase in both severity and frequency due to changes in rainfall patterns related to climate change. Flooding can have a devastating impact and climate change means that we’re already seeing more extreme weather. The most recent climate change predictions confirm we will experience wetter winters and drier summers, with an increased likelihood of more intense rainfall leading to flooding.  

The Portreath Flood Resilience Proposal is now exploring how we can improve the existing flood defences at Portreath, to allow for future flooding and long-term maintenance and repair of the existing tunnel, which is approaching its 100th year. On the right hand side of this page you can read about the options and our preferred approach of reinstating the existing channel from the Debris Screen to Portreath Beach.


What has The Environment Agency done so far?

We have taken a series of actions to improve the way that flood risk is managed in the area:

  • Reviewed and improved river and rainfall monitoring
  • Provided a new targeted flood warning service, specifically for Portreath
  • Worked with landowners and commercial growers in the catchment, to encourage best practice cropping and soil management
  • Upgraded the debris screen to the tunnel, to improve its effectiveness and reduce health and safety risks

We are also now working with Cornwall Council, to review and update the Critical Drainage Area – a designated zone that sets standards for surface water drainage from new developments, in the growth area of Camborne, Pool and Redruth. You can read more about this on Cornwall Councils website SuDS for Cornwall.


We want you to get involved!

  • Register with EngagementHQ to interact with the tools on this page.
  • Subscribe to this project to be added to our mailing list.
  • We've provided a collection of information on this page based on the enquiries we've received, and the questions we had at the drop-in event.
  • We will advertise future public events on this page, in addition to communicating them via other means.
  • We've included the survey results from our previous public engagement event and we'll do the same for future events and surveys.
  • There is a planned timeline of next steps to keep up to date with overall progress
  • We will be adding to this page as the project progresses, let us know if there's information that would be useful to see here.
  • You are welcome to contact us using the email provided for any enquiries relating to the Portreath Flood Resillience project - please add 'Portreath' to the subject line.
  • We have a news section below where we will provide monthly updates. Do come back and have a look.



The Environment Agency is looking at options to improve flood resilience for the people of Portreath.

Why is The Environment Agency concerned about Portreath?

The Environment Agency's 'Flood Risk Management Plan for England' helps us focus our efforts on the highest risk communities. Across England, 175 communities are designated as having a nationally significant level of flood risk to people, the economy or the environment. Portreath is one these communities, it is one of only three communities in Cornwall designated at highest risk from flooding.

Portreath Now

Flooded channel in Portreath following heavy rain

Currently the Portreath Stream flows through the 1km Portreath Tunnel and into the sea north of the village. During floods, lack of capacity in the tunnel causes excess flood water to flow into Portreath and flood properties. There are two issues with the tunnel:

  • It has limited capacity during a flood
  • It is difficult to access safely for maintenance and emergency works

To minimise flood risk to the community, the Environment Agency inspect the tunnel and debris screen, as well as monitoring water levels and issuing flood warnings. In 2024, we also invested in improvements to the debris screen as part of a national programme.


Portreath in the Future

Flooding is forecast to increase in both severity and frequency due to changes in rainfall patterns related to climate change. Flooding can have a devastating impact and climate change means that we’re already seeing more extreme weather. The most recent climate change predictions confirm we will experience wetter winters and drier summers, with an increased likelihood of more intense rainfall leading to flooding.  

The Portreath Flood Resilience Proposal is now exploring how we can improve the existing flood defences at Portreath, to allow for future flooding and long-term maintenance and repair of the existing tunnel, which is approaching its 100th year. On the right hand side of this page you can read about the options and our preferred approach of reinstating the existing channel from the Debris Screen to Portreath Beach.


What has The Environment Agency done so far?

We have taken a series of actions to improve the way that flood risk is managed in the area:

  • Reviewed and improved river and rainfall monitoring
  • Provided a new targeted flood warning service, specifically for Portreath
  • Worked with landowners and commercial growers in the catchment, to encourage best practice cropping and soil management
  • Upgraded the debris screen to the tunnel, to improve its effectiveness and reduce health and safety risks

We are also now working with Cornwall Council, to review and update the Critical Drainage Area – a designated zone that sets standards for surface water drainage from new developments, in the growth area of Camborne, Pool and Redruth. You can read more about this on Cornwall Councils website SuDS for Cornwall.


We want you to get involved!

  • Register with EngagementHQ to interact with the tools on this page.
  • Subscribe to this project to be added to our mailing list.
  • We've provided a collection of information on this page based on the enquiries we've received, and the questions we had at the drop-in event.
  • We will advertise future public events on this page, in addition to communicating them via other means.
  • We've included the survey results from our previous public engagement event and we'll do the same for future events and surveys.
  • There is a planned timeline of next steps to keep up to date with overall progress
  • We will be adding to this page as the project progresses, let us know if there's information that would be useful to see here.
  • You are welcome to contact us using the email provided for any enquiries relating to the Portreath Flood Resillience project - please add 'Portreath' to the subject line.
  • We have a news section below where we will provide monthly updates. Do come back and have a look.



  • January 2026 Update

    On 22nd December the Environment Agency were invited to attend a site walk over with MP Perran Moon and representatives from the Parish Council, Love Portreath and PFRAG. The objective of the visit was to walk the channel to discuss the proposal and further understand any community concerns.

    Thank you to everyone who met with us and shared feedback. Please be assured that the below focus areas raised by the community during the visit are being developed through the current design phase.

    • Surface Water run off
    • Residual Risk Assessment
    • Flood risk model report


    Ongoing Activities:

    • Following the December site visit we are continuing work to address the concerns raised by the community.
    • In December we met with Cornwall Highways to discuss surface water run-off and understand their perspective. The project team are continuing to develop an approach to address surface water run-off within the current design.
    • Preparations are underway for further ground investigations to start from 19th January. Works will be undertaken using handheld tools to obtain core and trial pit samples. We anticipate minimal disruption, and any access requirements are being communicated in advance.
    • Through January we will seek pre-application support from Cornwall Council to ensure all considerations are addressed.
    • On Tuesday 13th January Environment Agency representatives will be available at the community hub, please feel free to drop in and speak with the team. If this date isn't suitable, we will be back at the community hub on the 3rd of February.



  • Resident meetings and monthly drop-in

    Resident meetings
    Throughout November and December, Environment Agency representatives visited Portreath residents whose properties back onto the stream to discuss the Flood Resilience Proposal.

    Thank you to everyone who met with us and shared feedback—your local knowledge has been invaluable. A follow-up letter will confirm the details discussed and explain how further information will be provided as the proposal progresses.

    To keep the community informed, we’ve launched this page on EngagementHQ. It includes information from the public event held on 9th September 2025 including a summary of comments received via the feedback forms, and responses to frequently asked questions.

    Ongoing activities :

    • Following the September public event, we are in the process of updating the design to reflect residents’ feedback.
    • We met with the World Heritage Officer to ensure the proposal respects the historic landscape.
    • We are meeting Cornwall Highways to discuss surface water run-off, understand their perspective, and understand how it will be accounted for in the scheme.
    • An Environmental Impact Assessment (EIA) Screening Opinion Request was submitted to Cornwall Council in October Ref: PA25/08179. Cornwall Council have concluded that the proposed works do not require an Environmental Impact Assessment.
    • Preparations are underway for further ground investigations in early 2026, works will be undertaken using handheld tools to obtain core and trial pit samples. We anticipate minimal disruption, and any access requirements will be communicated in advance.
    Community Hub drop-in days
    Starting on Tuesday, 13 January, and on the first Tuesday of each month, Environment Agency representatives will be available at the community hub. Please feel free to drop in and speak with the team.
  • Portreath Public Drop-in Event

    supporting image

    On the 8th of September we held an event at the Millennium Hall in Portreath. The event was focused on providing an overview of the proposals to date and how we have considered the public feedback received.

    Nine members of the project team were available at the event to provide further details and responses to resident’s specific questions. Between 10am and 7pm over 170 people came to speak to us, and 94 residents completed our feedback survey.

    The information from the survey has been really useful, the survey showed us that the most common concern was "Will raw sewage flow down the channel and onto the beach? " You can see information about sewage and other 'Frequently Asked Questions' on the right hand side of this page. We will add to these as we work though the feedback and other enquiries we've received by email.

Page last updated: 09 Jan 2026, 11:22 AM