Welcome!

One Tam is planning for the future of the Bothin Marsh Open Space Preserve in order to maintain public access to Marin’s shoreline throughout future challenges associated with climate change and sea level rise. The Evolving Shorelines Project is focused on maintaining safe and equitable active transportation and public access through the Preserve in a way that supports the highly-valued marsh habitats along the shoreline. Please take 10 minutes to look at three different concepts and share your thoughts.  

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The map below shows the Bothin Marsh and the Mill Valley-Sausalito Multi-Use Pathway segment of the Bay Trail, which are the focus of the Evolving Shorelines Project.

<em>The map below shows the Bothin Marsh and the Mill Valley-Sausalito Multi-Use Pathway segment of the Bay Trail, which are the focus of the Evolving Shorelines Project.</em>
First, tell us about how you visit the Bothin Marsh Open Space Preserve today.

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* 1. How do you visit Bothin Marsh and it's multi-use pathways? (Check all that apply)

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* 2. How often do you visit Bothin Marsh?

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* 3. Have you ever experienced flooding along the pathways at Bothin Marsh? (Check all that apply)

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* 4. Does sea level rise impact your daily routine?

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* 5. Did you know that sea level rise adaptation projects were being planned at Bothin Marsh?

Please review the following concept graphics and descriptions before answering questions 6 through 9.

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Concept 1 elevates the pathway in place by building up the existing embankment. It also would lengthen bridges to allow for restoration of tidal action to South Bothin Marsh. Some drawbacks of this approach are the large footprint of the elevated trail embankment over large areas of existing marsh habitat, its limited capacity for ecological connectivity between the North and South Bothin Marsh, and its limited sea level rise adaptation capacity due to likely subsidence of a heavy trail embankment.

Concept 1 elevates the pathway in place by building up the existing embankment. It also would lengthen bridges to allow for restoration of tidal action to South Bothin Marsh. Some drawbacks of this approach are the large footprint of the elevated trail embankment over large areas of existing marsh habitat, its limited capacity for ecological connectivity between the North and South Bothin Marsh, and its limited sea level rise adaptation capacity due to likely subsidence of a heavy trail embankment.

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Concept 2 elevates the pathway with a causeway in the existing alignment allowing for restoration of tidal action and ecological connectivity to North and South Bothin Marsh. It also allows for connection of Coyote Creek and fluvial sediment delivery to the marsh. Some drawbacks to this approach are the impacts to existing marsh habitat to redirect the creek and the high cost of an elevated causeway.

Concept 2 elevates the pathway with a&nbsp;causeway in the existing alignment allowing for restoration of tidal action and ecological connectivity to North and South Bothin Marsh. It also allows for connection of Coyote Creek and fluvial sediment delivery to the marsh. Some drawbacks to this approach are the impacts to existing marsh habitat to redirect the creek and the high cost of an elevated causeway.

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Concept 3 re-aligns large segments of the pathways out of the marsh to existing high-ground and allows for full hydraulic and ecological connections between the creek, marsh, and bay. This trail alignment provides more connectivity to Tam Junction but also increases the length of the pathway and offers a different experience of the marsh. Some drawbacks of this approach are the potential impacts to the existing upland and transition zone habitats of South Bothin Marsh.

Concept 3 re-aligns large segments of the&nbsp;pathways&nbsp;out of the marsh to&nbsp;existing high-ground and allows for full hydraulic and ecological connections between the creek, marsh, and bay. This trail alignment provides more connectivity to Tam Junction but also increases the length of the pathway and offers a different experience of the marsh. Some drawbacks of this approach are the potential impacts to the existing upland and transition zone habitats of South Bothin Marsh.

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The chart below provides a preliminary evaluation of the three concepts.

The chart below provides a preliminary evaluation of the three concepts.

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* 6. As the Bay Trail is elevated out of the flood zone, it could end up having a much different trail experience. What are the most important considerations for the future pathway? (Check all that apply)

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* 7. What is your willingness to extend the length of the Bay Trail?

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* 8. What about the concepts for the pathway excites you most? What is concerning?

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* 9. Tell us more about your vision for the adaptation of the Bothin Marsh Open Space Preserve. What would you like to see? What did we miss? Are there ways you would like to be involved?

Your answers to the remaining questions are optional and will be confidential. Your answers will help us understand how well the entire community's voice is represented in the survey results.

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* 10. What is the nearest street intersection to your home?

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* 11. How old are you? 

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* 12. What is your racial or ethnic identity? 

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* 13. What is your gender identity? 

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* 14. Do you have school-aged children? 

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* 15. Are you a person living with a disability or mobility issue? 

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* 16. Which category best describes your school or employment status? 

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* 17. Which of these categories best describes your income last year? 

Thank you for participating! We'd like to hear from everyone in your household individually (kids, adults, and seniors). Please let all of your family, friends, and neighbors know about this survey.

If you'd like to stay in touch with the project, please subscribe to our mailing list.

Check out the project website to get better acquainted with the project: onetam.org/bothin

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