In honor of the 75th anniversary
Cool Story I came across a couple years back about Hoppers Hands:
i wonder if Ft. Point had waves before ###### was there? anyone know?
Had the exact same thought this morn. Seems like they didn't change the actual land mass too much, but perhaps in shaping it & putting in the bulk heads they refined the point? Would the bridge pilings have an impact? Perhaps channeling the wave energy?
Since the bridge is 75 yrs old and people weren't surfing here that long ago, I'm guessing we'd only know if someone got a good picture of the point on a day it happened to be breaking. Would be a really cool pic if it existed.
That Hopper's Hands story is pretty intense.
Good to know that despite all the terrible things that seem to happy regularly nowadays there are still good people in this world.
Hats off to him and his colleagues.
Can you please give some statement from the last picture? Is that person a bridge builder? What is his duty and what is he doing in that posture?
An Audacious Plan
To build the bridge, workers would have to erect a pier more than 1100 feet out inn thee midddle of the Gate -- the first bridge support ever constructed in the open ocean. Chief engineer Joseph Strauss' bold plan called for workers to first build a giant fender to protect the pier from stray, fog-bound ships. The fender would enclose a football-field-sized area from which water would be pumped out. The concrete tower foundation would be laid inside. Once this was completed, water was to be pumped back into the 40-foot-thick concrete walls of the fender, in order to strengthen the fender against the current.
90 Feet Down
Divers were crucial to the plan. They guided beams, panels, blasting tubes and 40-ton steel forms into position and secured them, striving all the while to avoid being swept away in the current. Workers shot timed black powder bombs deep into bedrock through the blasting tubes, often with such power that dozens of fish would be thrown out of the water and onto the south shore. Divers sometimes ventured as deep as 90 feet below the surface to remove detonation debris. They smoothed the floor's surface using underwater hoses that exerted 500 pounds of hydraulic pressure. To add to the difficulty, divers worked blindly, forced to feel their way due to murky water, fast-changing currents and bulky diving suits.
Work inside the fender was the riskiest. At any moment, its walls could collapse from contact with a stray ship lost in the fog, or from the intense pressure exerted by the currents. "We were down damn near 50 feet, and every time you go down 29 feet you double your atmospheric pressure," recalled diver Bob Patching. "Well, that's strong enough it can hold you smack against a wall, and you can't move."