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Concrete towers reinforced with steel began to replace brick masonry towers at the beginning of the 20th century; the first was constructed in 1908 at Point Arena, California. Steel in concrete structures provided the tensile properties that concrete alone lacks. Most major reinforced concrete towers are found on the West Coast where they are best adapted to the dangers of earthquake damage. A series of art-moderne reinforced concrete lighthouses were built along the Alaska coast in the 1920s and 1930s, replacing earlier deteriorated wooden structures. Surviving examples of reinforced concrete lighthouse towers include: POINT ARENA LIGHT, CA (1908) ALCATRAZ ISLAND LIGHT, CA (1909) MOLOKAI (KALAUPAPA) LIGHT, HI (1909) PUNTA GORDA LIGHT, CA (1912) MARROWSTONE POINT LIGHT, WA (1912) KILAUEA POINT LIGHT, HI (1913) POINT WILSON LIGHT, WA (1914) CAPE ST. ELIAS LIGHT, AK (1916) NAVASSA ISLAND LIGHT, CS (1917) DIAMOND HEAD LIGHT, HI (1918) MARCUS HOOK REAR RANGE LIGHT, DE (1918) LIME KILN LIGHT, WA (1919) POINT JIGUERO (HIGUERO) LIGHT, PR (1922) POINT RETREAT LIGHT, AK (1923) GUARD ISLANDS LIGHT, AK (1924) CAPE SPENCER LIGHT, AK (1925) POINT VICENTE LIGHT, CA (1926) CAPE DECISION LIGHT, AK (1932) BROWNS POINT LIGHT, WA (1933) BARBERS POINT LIGHT, HI (1933) NAWILIWILI HARBOR LIGHT, HI (1933) CAPE ARAGO (CAPE GREGORY) LIGHT, OR (1934) CAPE HINCHINBROOK LIGHT, AK (1934) SENTINEL ISLAND LIGHT, AK (1935) TREE POINT LIGHT, AK (1935) TURN POINT LIGHT, WA (1936) MARY ISLAND LIGHT, AK (1937) POINT HUENEME LIGHT, CA (1941) CAPE SARICHEF LIGHT, AK (1950) | |
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