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Construction of the Seawall
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.....Two recommendations were made. First build a seawall, 17 feet high and three miles long. Then raise the entire elevation of the Island from eight to fifteen feet.
.....The first contract was with J. M. O'Rourke and Company of Denver to build the seawall. Construction began in February, 1903. Along the construction line, the ground was excavated to three feet deep and sixteen feet wide. Pine pilings were driven into the ground from forty to fifty feet. Additional one foot planking was driven down twenty four feet to prevent undermining of the structure. The wall was built in sixty foot sections by pouring concrete into molds with steel rods every three feet. Such a massive concrete pour required seven days to set. So the pours were made in alternate sections and then crews went back and filled in the gaps linking the wall together with tongue-in-groove joints. .....The side facing the sea was designed concave to redirect the force of the waves upward. To prevent wash-out at the bottom of the structure, twenty-seven feet of granite boulders were placed to protect the base. The pink granite boulders were hauled in from the "Granite Mountain" in Marble Falls, Texas. The first section of the seawall was completed in 1910. Five years later, a storm in August of 1915 gave the seawall it's first real test. The seawall was deemed a success, with a loss of only 275 lives, far short of the thousands lost in 1900.
.....Originally, the seawall extended to 6th street and wrapped around back to Water (Harborside). Since the initial construction in 1902, the seawall has been added on to repeatedly until today when it spans a distance of 10 miles. |
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Last update for this page on April 3, 2005