In a scenic coastal enclave of California, affluent homeowners are embroiled in a dispute with local authorities, demanding action to preserve the sole access road to their luxurious estates. These residents are urging the county to fund the upkeep of this roadway, warning of potential financial repercussions amounting to billions of dollars if their high-value properties are compromised.

The road in question, Calle del Arroyo, stretches for half a mile off Highway 1 in the picturesque Stinson Beach area. It has become increasingly vulnerable due to the impacts of climate change, experiencing frequent flooding during king tides. This issue threatens some 500 properties within the Seadrift community, as reported by the SF Chronicle.

Marin County’s recent sea level study forecasts that by 2050, this two-lane road will be prone to flooding during major storms, and by 2060 to 2075, high tides could render it impassable on a regular basis.

Should the county neglect to address this issue, the homes in this area, which boast a median sale price of $5.3 million, face a significant devaluation risk.

The debate over jurisdiction has led Seadrift community representatives to take a proactive stance, cautioning the county’s Board of Supervisors through a formal letter. They warned that abandoning the road could expose the county to ‘billions in liability.’

Plans to protect Calle del Arroyo, aptly named as it translates from Spanish to “creek street” or “street of stream,” involve a projected $22.8 million investment to elevate the road. This ambitious project is anticipated to span over two decades.

Robin Bartlett, principal civil engineer with Marin County’s Department of Public Works, told the San Francisco Chronicle that the project would not be easy, as it is connected to utilities that would need to be raised.

In addition to Calle del Arroyo, $53million would need to be invested in other roads in Stinson to protect them from rising sea levels, which could cost each property more than $100,000, according to the county’s report.

Calle del Arroyo is a half-mile road off Highway 1 in Stinson Beach, California that is threatened by rising sea levels

The two lane road is the only point of access to the roughly 500 homes within the enclave

Marin County is one of the wealthiest counties in the entire nation.

From 2019 to 2023, the median household income was $142,800. The median income in the state was $96,300, while the national median was $75,800, according to USA Facts.

According to Data USA, the median household income in Stinson Beach, home to just over 360 people, was $117,000 in 2023.

Marin County’s report said sea levels in the area are expected to rise by 10 inches by 2040 or 2050 from 2000.

The report states that natural disasters in the area will become prominent by 2050.

By 2085, sea levels are expected to rise by a staggering 3.3 feet from 2000. At this point, a severe, 100-year storm could cause up to $1.3billion in property damage, the report claims.

According to the San Francisco Bay Conservation and Development Commission, a two-foot sea level rise is expected by the end of the century, and Marin County would need at least $17billion to protect itself from it, which is about $65,000 per resident.

 Calle del Arroyo already regularly floods during king tides, a trend predicted to worsen 

Residents of the Seadrift community have threatened the Marin County that if the road was abandon that they could be held responsible for the billions of dollars lost in real estate 

Despite looming signs of doom, residents continue to make their way to the community.

‘I don’t think anyone thinks sea level rise isn’t going to happen,’ Ashley Bird, an agent at Seadrift Realty, told the San Francisco Chronicle.

‘They know they’re taking a huge financial risk. They’re just willing to take the risk because they love Stinson so much.’

Local realtors told the SF Chronicle that Stinson Beach residents are unfazed by the doomsday warning because they can afford to put their most expensive assets on the line.

They also have the funds to take preventive measures and make repairs to mitigate the damage to their properties.