Sunday, June 16, 2024

Tales from the Logbook--Diving Beneath the Arroyo Hondo Bridges

The most “haunting” dive I remember took place at Arroyo Hondo under the old US 101 Highway bridge and railroad trestle.  I find recalling the details nearly four decades later still makes me a bit uneasy.

The late-Sunday morning of January 6, 1985, was foggy, damp, and cold.  Mark Bursek and I geared up on the edge of the old highway bridge that spans Arroyo Hondo. 

We were adventurous, neophyte divers eager to discover the numerous pullouts along U.S. 101 west of El Capitan State Beach that led to some pretty awesome dive sites.  We could see sections of thick kelp from the highway; beds so thick that kelp harvesting vessels regularly worked the area.  Without a boat, we could only access these sites by pulling off the highway, finding a trail and “mountain goating” down the coastal bluffs to ocean’s edge.  Most of these pullouts were not marked save for an occasional car or truck pulled off and parked the side of the highway.  That was not the case for Arroyo Hondo marked by not one but two bridges.


We looked over the edge of the embankment from the highway bridge and saw the path that would take us under the adjacent railroad trestle to the rocks at water’s edge.  Mark had heard about this place and wanted to check it out.  It was my 15
th dive and only my third shore dive.  We planned on following the exposed pipelines to see where they led.  These pipelines connected offshore components of the Shell Molino natural gas field to its onshore processing equipment on the opposite side of the highway. 

I preferred to make the trek from parking spot to entry point fully geared up.  Mark did the same.  I wore my lug-soled sneakers for traction on the path carrying my mask, fins, and snorkel and booties in a mesh goody bag.  Mark led the way down the path.  We soon made it to the bottom.  No one else was around.  Even though we could hear cars on the highway above, we were alone.  Not even a troll could be found.

I exchanged my shoes for the neoprene booties, placing the shoes among rocks above the tide line.  We scanned the area and determined the best entry point would be near where the pipelines transitioned from the beach to arroyo. The intertidal area had a lot of large rocks and other geological features tthat could trip us up.  We did our buddy checks, entered the water and swam out through the breaker zone.  I set the bezel on my Seiko dive watch to record our descent time, 12:10 p.m., as we dropped beneath the water.

We started following the exposed pipeline into deeper water.  Navigation was easy, just follow the pipeline.  Little light penetrated the fog and haze.  The deeper we swam the darker it seemed to get.  Many swell sharks lazed in the gap between the pipes and the seafloor.  They seem unfazed by our passing by.  We continued on into the thick kelp bed, which sometimes concealed the pipeline.  Visibility was good, enough for me to see Mark in the lead, and a little beyond him.  We stated to hear a “bang-bang-bang” at regular intervals.  It sounded like someone hitting a 55-gallon drum with a mallet. 



In about 20 feet of water, we came across the remains of a gull, nothing but bones and a few feathers. A sense of uneasiness overcame me.  We continued on, and the banging got louder.  At a depth of about 25 feet, my air pressure gage indicated I had consumed half a tank of air.  We turned around and with me leading made our way back toward the exit point following the pipeline.  Once again, we passed over the gull’s remains.   I couldn’t figure out whether it represented the final resting place of the gull or whether it was the remains of some other critter’s lunch.  I did not stop to do a post-mortem.

None of the swell sharks seemed to have moved. 

We surfaced near our descent point.  My watch indicated the dive lasted forty minutes bottom time.

Back beneath the trestle, sitting on the rocks, we both remarked how “spooky” the dive felt.  We figured the reaction resulted from the combined effects of darkness, finding the carcass, and the banging noise we heard throughout the dive.

Over the next 10 years, I would check out many of the turnoffs, but I never returned to the spot beneath the twin bridges. Of the hundreds of dives I made over the years, this experience stands out in my mind. 

I wonder if anyond dives this site today from the shore  The Molino Field infrastructure was decommissioned in the late 1990s.  The plan evaluated by the State Lands Commission called for the pipelines to be removed from landfall shoreward to approximately a 15 foot depth.  Beyond that point (about 600 feet from shore) the lines were to be cleaned, capped, and abandoned in place.  Lines in Arroyo Hondo would also have been removed. The beach is accessible from the old highway bridge.  The path down the hill and the entry sounds like it hasn't changed much since Mark and I did it on that January day.  

On a clear day, the kind of days that foster website images of Arroyo Hondo, the vistas are stunning.  On that foggy, cold January day it was spooky.



Divining The Signs

This spot was unknown to me so it was approached with curiosity and caution.  I was a new diver, who didn’t know what I didn’t know.  I usually experience a little bit of anxiousness before diving a new location similar to the “butterflies.”  Good dive planning, checking equipment, being with a good buddy minimizes this feeling.  Most of the time, any residual butterflies take flight as soon as I hit the water. 

Then there is the effect of finding the remains of the damn bird.   As a recent Thayer Birding blog[1] related:

“Seeing dead birds may symbolize something tragic or coming to an end, but does not always foretell death. Also, not every receiver obtains the same message when seeing a dead bird. At the end of the day, it is mainly the witness’s personal background that determines what might come about tragically or be brought to an end. However, that doesn’t mean dead bird omen is negative all the time. There are still a few circumstances where dead birds are a sign of the beginning of something exciting….the meaning of dead birds is varied and mostly turns out to be negative and upsetting. It can be a severe health risk, loss of freedom, dreams interruption, threat signals and worst of all, death. Still, hopefulness and encouragement do exist even in the darkest time. It can be a useful reminder for you of being careful of danger around or motivate a new adventure of your life.”

The effect of seeing the gull’s remains was not unlike the feeling I experienced while diving with my brother Andy and Brandon Cole from another roadside entry point near the Butterfly House in Carmel, California on September 16, 1990.  We were swimming through very thick kelp when we came across a very dead shark on the bottom.  At about three or four feet, it was a good sized animal with very prominent bite marks across its body.  I immediately thought food chain with a bigger shark biting a smaller shark.  Needless to say, we kicked a little faster to get back to our exit point.

When it comes to the sedentary swell sharks, as the Aquarium of the Pacific website Species in Detail notes:

“Swell sharks…prefer a boulder and rocky reef type substrate with liberal growths of algae, especially kelp. Although this species has been reported to a water depth of 457 m (1499 ft), it is most commonly found in water 5 to 37 m (16.4 to 121.4 ft) deep. Well-camouflaged, they frequent caves, shallow rock crevices, and crevices around kelp forests….Poor swimmers, these fish tend to lead a rather sedentary life style. Their daytime hours are spent resting, while hiding in crevices, caves, holes, and under overhangs where they sometimes stack on top of each other like cordwood.  Their solitary feeding activities take place during night hours and are rather passive in nature as these animals prefer to let food come to them, rather than chasing after it.”[2]

Lastly, the mysterious drum-like banging.  We both seemed put off by it.  We could not figure out where it originated.  We saw no vessels in the area.  In later years, I formed a hypothesis after investigating the effects of noise from seismic surveys on divers.  The effects are mostly physiological.  The sound can cause a stress response that can lead to a feeling of uneasiness in divers, particularly inexperienced divers.  Years later I was told that there were no active seismic surveys in the area, but I am not sure that every type of survey would have been permitted under the offshore oil and gas regulations written at the time.  The sound also could have been from a pile driving.  There was a great deal of marine construction and other activities going on in the area related to offshore oil and gas during that period.  Whatever the source, the sound contributed to an unsettling effect on us.



[1] What Does a Dead Bird Mean? Ominous or Not?  October 2, 2022.  Thayer Birding.  https://www.thayerbirding.com/what-does-a-dead-bird-mean/ Accessed November 25, 2022.

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