Along a quarter mile of California beach where 12 wooden wharves once carried drilling rigs over the surf, only eight of the abandoned oil wells left behind have been sealed and the rest still bleed tar into the sand

At low tide on a February morning, an excavator crawled to the far west end of Summerland Beach and started digging a pit in wet sand.

The hole refilled as fast as the bucket emptied it.

About six feet down the steel appeared, the corroded top of a hole punched through pier planking before anyone now alive was born.

Everything here was drilled with cable tool rigs, meaning a heavy iron bit dropped over and over through an opening in the pier deck until it broke into oil sand.

A dark ribbon rose with the seawater and spread across the pit.

That hole had been filled and forgotten for the better part of a century.

So why was it still bleeding?

Why a hole that was already filled starts leaking again

Everything here was drilled with cable tool rigs, meaning a heavy iron bit dropped over and over through an opening in the pier deck until it broke into oil sand.

In the shallowest producing sand along this coast, oil sits at an average depth of roughly 140 feet.

When a hole that shallow stopped paying, the crew pulled back whatever steel was worth money and packed the rest with sand, timber, or nothing.

What is down there now is not a plug.

It is a column of loose fill inside a rusted pipe, with an oil bearing formation underneath and seawater pressing in from the side.

Crude is lighter than salt water, so it climbs.

Storms scour the beach to hardpan, the fill settles, and the oil finds the gap.

Every storm helps it.

A wharf 1,230 feet long and the stumps that outlived it

The pilings in the surf are the last visible piece of the strangest industrial landscape this coast ever produced.

A local operator ran a pier 300 feet out from the sand, set a derrick on the end of it, and drilled straight down through the deck.

It paid.

Within three years twelve wharves stood in the water off Summerland, with twenty two companies working wells from them.

The biggest was built by a mining engineer who wanted the heavy local crude as locomotive fuel.

It reached 1,230 feet out, ran 75 feet wide, and carried nineteen wells along its length.

More than 412 wells went into the ground here in eleven years.

The mechanics never got more complicated: a platform over the surf, a cable tool rig on the planks, a hole driven into the seabed.

When the field died the piers rotted or burned.

The holes stayed.

The count nobody has finished yet

The first of these wells came in during 1897, from a pier built the year before, which is why this quarter mile gets called the birthplace of offshore oil.

Production stopped for good in 1939.

Nobody can say precisely how many wellheads were left behind.

A Santa Barbara ocean nonprofit and a research partner have surveyed the seafloor here since 2023, with a final report due in December 2026.

Their boats carry multibeam sonar, methane detectors, and crude sensors sharp enough to register concentrations near one part per billion.

Early passes turned up faults and fractures older maps missed, plus connections between wells nobody had drawn.

State managers count about 200 high priority legacy wells along the California coast, the ones judged capable of putting oil into the water, and Summerland holds the densest cluster.

Eight have been sealed since 2018.

Two million dollars a year against a century of open holes

Money is the constraint, and it is not close.

A state law passed in 2017 set aside roughly $2 million a year for this work.

The two wells storms uncovered last February cost about $1.15 million to seal, and the work took four days inside a window running from February 23 to March 1.

An earlier pair sitting 300 feet offshore in 20 feet of water needed a marine construction barge and ran closer to $2 million.

State records put the running total at eight.

The agency’s external affairs chief calls them vestiges with no owners and no records of former operators, which is the polite way of saying the bill is public.

Local reporting quotes her without padding: they would do as many as possible, and funding stops them.

What this beach still owes

Summerland is not an outlier. It is the oldest example.

A federal estimate from 2023 counted roughly 3.7 million abandoned and orphaned wells across the United States, out of 4 to 5 million drilled since 1859.

Most sit inland where nobody walks over them barefoot, and many are forgotten wells venting methane from places no agency has mapped.

The abandoned oil wells under this sand are simply the ones you can smell.

The same industry now runs deep water programs aimed tens of thousands of feet beneath the Gulf seafloor.

On this beach the tools are an excavator, a tide table, and a steel pipe 30 inches across hammered into blue clay and filled with cement.

Eight sealed, roughly two hundred on the list, and a map that will not be complete until the end of this year.

The tide comes back either way, and it brings the tar with it.