| 词条 | Racine Reef Light |
| 释义 |
| name = Racine Reef Light | image_name = Racinereef.JPG | caption = Racine Reef Light (USCG) | location = Lake Michigan east of Racine | coordinates = {{coord|42|43|39.18|N|87|44|10.02|W|region:US_type:landmark}}[1] | yearbuilt = 1906[2] | yearlit = | automated = 1954[2] | yeardeactivated = 1961[2] | foundation = Brick/concrete pier | construction = Brick and concrete | shape = octagonal house with central tower | marking = | height = | focalheight = {{convert|72|ft|m|abbr=on}}[3] | elevation = | lens = fourth order Fresnel lens }} The Racine Reef Light was a lighthouse located in Lake Michigan some two miles east of Racine, Wisconsin, marking the edge of its eponymous shallows. It was torn down in 1961 and replaced with a skeleton tower on the same foundation. HistoryThe Racine Reef is a major hazard to navigation not only for shipping in and out of Racine harbor, but also for traffic between Milwaukee and Chicago. It has been marked with a succession of aids, starting with a can buoy placed in 1869 after a study of erecting a lighthouse on the reef itself found the expense to be too great.[4] Various shore lights were also added including ranges based on the Racine breakwaters and a red beacon mounted on the Wind Point Light. These measures were found to be ineffective, and in 1898 construction began on a beacon set in the center of the reef. This acetylene-powered lamp was placed on a masonry platform resting on a wood crib; the light was first lit on August 31, 1899.[2][4] This arrangement proved quickly to be quite problematic; the light was difficult to service and ever-increasing piles of rip-rap were laid about the platform in attempts to curb erosion and storm damage. In 1901 the beacon's iron tower was also made taller, but the problems continued.[4] In 1901 the lighthouse board decided that a manned light was required, and in 1903 obtained a $75,000 appropriation.[4] Construction was protracted: the crib and concrete pier foundation were not completed until 1905. Atop this was erected a three-story octagonal brick house with a tower in the center to hold a fourth order Fresnel lens.[2][4] The original steam whistle fog signal was replaced with diaphone foghorns in the mid-1920s.[4] The new tower was placed at the eastern edge of the reef, and upon its activation the old beacon was abandoned.[4] The light was automated in 1954, but in 1961 the house was demolished due to the difficulties of maintenance.[2] By that point large amounts of rip-rap had been dumped around the pier in order to reduce vibration from waves and to limit winter icing of the structure.[4] A steel tower replaced the house and remains in service. The Fresnel lens was preserved and is displayed at the Racine Heritage Museum. References1. ^{{cite uscgll|7|2013|191}} {{Lighthouses of Wisconsin}}2. ^1 2 3 4 5 {{cite uscghist|WI}} 3. ^{{cite web|url=http://terrypepper.com/lights/lists/focalheight.htm|title=Focal Heights|first=Terry|last=Pepper|accessdate=2014-07-09}} 4. ^1 2 3 4 5 6 7 {{cite web|url=http://terrypepper.com/lights/michigan/racine-reef/racine-reef.htm|first=Terry|last=Pepper|title=Racine Reef Lighthouse|accessdate=2014-07-09}} 6 : Lighthouses completed in 1906|Lighthouses in Wisconsin|1906 establishments in Wisconsin|Buildings and structures in Racine, Wisconsin|1961 disestablishments in Wisconsin|Buildings and structures demolished in 1961 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。