| 11. | The front range light had already been lost due to erosion.
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| 12. | That year a pair of lighthouses were erected in a range light configuration.
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| 13. | In 1953, a rear range light was put up on Mt.
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| 14. | Doyle later supervised the erection of the shorter Bloody Point Rear Range Light.
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| 15. | The rear range light is almost always taller than the front.
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| 16. | The Tinicum Island Range Lights were activated on New Year s Eve 1880.
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| 17. | In 1912, the Lighthouse Service erected temporary range lights on one of the piers.
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| 18. | The Finns Point Range Light upstream of the Salem River was deactivated in 1950.
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| 19. | This light is paired with a large rear range light.
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| 20. | In 1909 Bellevue range lights were activated to mark the route up the Delaware.
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