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Card 479 of 9842026-09-13 issue

Observed arrival · 2026-09-13

Marin City Sponge Project: The Bowl, the Bridge, and the Water with Nowhere to Go

marincitysponge.com Observed source
Editorial interest 89/100 Selection signal · not a rating of the site

A civic explainer, flood model, document archive, and resident-reporting toolkit for Marin City's high-tide flooding.

Landing page captured for the 2026-09-13 issue.

Field notes

The project maps a drainage system in which roughly 344 acres run toward low ground near Drake Avenue and Donahue Street before reaching a culvert beneath the Highway 101 embankment. Its model and explanatory sequence connect rainfall, Richardson Bay tide levels, and the gate's behavior, while the document sections gather nine studies dating back to 1992 and work by four agencies. Residents are also given a measurement method using a photo with a curb, tire, or door as a known-height reference.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use
HumanPersonal, local, civic, or handmade
ƒJavaScriptBrowser-side code central

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W Has No Surviving Value

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marincitysponge.com

Landing page observed 2026-09-13. The live site may have changed.