Mahon River (Delaware)
Historical Light List Characteristics
| 1849 | F W. | USLHE Light List (US): 148 |
| 1858 | F W. W10. | LHB Light List (US): 200 |
| 1860 | LHB Light List (US): 183 | |
| 1865 | LHB Light List (All Coasts): 187 | |
| 1868 | LHB Light List (All Coasts): 189 | |
| 1870 | F W. W9. | LHB Light List (All Coasts): 200 |
| 1878 | F W. W13. | LHB Light List (All Coasts): 247 |
| 1879 | LHB Light List (All Coasts): 249 | |
| 1886 | F W. W123/4. | LHB Light List (All Coasts): 277 |
| 1888 | LHB Light List (All Coasts): 286 | |
| 1893 | F WR. W13, R13. Red sector between W. 1/4 N. and W. by S. | LHB Light List (Atlantic): 377 |
| 1898 | F WR. W123/4, R123/4. Red sector between S. 26° 15' W. (SSW. 3/8 W.) and S. 31° 25' W. (SSW. 3/4 W.), and another between W. 7/8 S. and W. 3/8 N. | LHB Light List (Atlantic): 463 |
| 1899 | LHB Light List (Atlantic): 475 | |
| 1905 | F WR. W111/4, R111/4. Red sector between SSW. 7/16 W. and SSW. 7/16 W.; another between W. 1/2 S. and W. 3/4 N.; and a third between N. 1/2 W. and N. 5/8 E. | LHB Light List (Atlantic): 516 |
| 1908 | LHB Light List (Atlantic): 549 | |
| 1915 | F WR. W11, R11. W000°-201°(201°), R201°-207°(6°), W207°-258°(51°), R258°-293°(35°), W293°-348°(55°), R348°-000°(12°). | USLHS Light List (Atlantic): 695 |
| 1917 | USLHS Light List (Atlantic): 711 | |
| 1920 | USLHS Light List (Atlantic): 736 | |
| 1927 | USLHS Light List (Atlantic): 784 | |
| 1931 | USLHS Light List (Atlantic): 963 | |
| 1935 | USLHS Light List (Atlantic): 1137 | |
| 1940 | Iso WR 6s. W11, R11. W000°-201°(201°), R201°-207°(6°), W207°-258°(51°), R258°-293°(35°), W293°-348°(55°), R348°-000°(12°). | USCG Light List (Atlantic): 1249 |
| 1943 | USCG Light List (Atlantic): 1633 | |
| 1945 | ||
| 1946-1947 | Fl WR 10s. W11, R11. fl 1. W000°-208°(208°), R208°-2371/2°(291/2°), W2371/2°-348°(1101/2°), R348°-000°(12°). | |
| 1950-1952 | ||
| 1953-1954 | USCG Light List - Vol. I-VI: 1708 | |
| 1955 | Fl WR 10s. W11, R11. fl 1. W000°-2071/2°(2071/2°), R2071/2°-2371/2°(30°), W2371/2°-3471/2°(110°), R3471/2°-000°(121/2°). | USCG Light List - Vol. I-VI: 1708 |
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 1834 | |
| 1961 | USCG Light List - Vol. I: 1834 | |
| 1963-1965 | ||
| 1966 | USCG Light List - Vol. I: 2171 | |
| 1969-1972 | ||
| 1973 | Fl WR 10s. W11, R8. fl 1. W000°-2071/2°(2071/2°), R2071/2°-2371/2°(30°), W2371/2°-3471/2°(110°), R3471/2°-000°(121/2°). | |
| 1974-1979 | Iso W 6s. W9. | |
| 1982 | Fl W 4s. W7. | |
| 1987 | USCG Light List - Vol. I: 38765 | |
| 1990-1992 | USCG Light List - Vol. II: 2170 | |
| 1993-1996 | USCG Light List - Vol. II: 2415 | |
| 2004 | Fl W 4s. W7. fl 0.2. |
Historical Light List Optics and Structures
| 1849 | 10 Lamps / 14" Refl. | 24 | N/A | Light on keeper's dwelling. | USLHE Light List (US): 148 |
| 1858 | 5th | 26 | 30 | LHB Light List (US): 200 | |
| 1860 | LHB Light List (US): 183 | ||||
| 1865 | LHB Light List (All Coasts): 187 | ||||
| 1868 | LHB Light List (All Coasts): 189 | ||||
| 1870 | LHB Light List (All Coasts): 200 | ||||
| 1878 | 31 | 57 | Light on frame tower, with a two-story dwelling attached, both painted buff; lantern painted red. | LHB Light List (All Coasts): 247 | |
| 1879 | LHB Light List (All Coasts): 249 | ||||
| 1886 | Buff-tower, and dwelling attached; lantern, red. | LHB Light List (All Coasts): 277 | |||
| 1888 | Buff tower, and dwelling attached; lantern, red. | LHB Light List (All Coasts): 286 | |||
| 1893 | 4th | White tower; white dwelling, with lead-colored trimmings and green shutters; lantern, black. | LHB Light List (Atlantic): 377 | ||
| 1898 | 54 | LHB Light List (Atlantic): 463 | |||
| 1899 | LHB Light List (Atlantic): 475 | ||||
| 1905 | N/A | 38 | White, square, two-story, wooden building, on iron columns, with lead-colored trimmings, and green shutters on the second story windows; lantern, black. White, square, wooden barn, with lead-colored trimmings, on iron columns, about 120 feet to northward of light-house, and connected with it by an elevated walk. | LHB Light List (Atlantic): 516 | |
| 1908 | White, square, two-story, wooden building, on iron columns, with lead-colored trimmings, and green shutters on the second-story windows; black lantern; white, square, wooden barn, with lead-colored trimmings, on iron columns, about 120 feet to N'd of light-house, and connected with it by an elevated walk. | LHB Light List (Atlantic): 549 | |||
| 1915 | N/A | White; square, 2-story house on iron columns. | USLHS Light List (Atlantic): 695 | ||
| 1917 | 36 | USLHS Light List (Atlantic): 711 | |||
| 1920 | USLHS Light List (Atlantic): 736 | ||||
| 1927 | USLHS Light List (Atlantic): 784 | ||||
| 1931 | 4 iov | White, square, 2-story house on iron columns. | USLHS Light List (Atlantic): 963 | ||
| 1935 | USLHS Light List (Atlantic): 1137 | ||||
| 1940 | 4 e | N/A | White, square house on iron columns. | USCG Light List (Atlantic): 1249 | |
| 1943 | USCG Light List (Atlantic): 1633 | ||||
| 1945-1947 | |||||
| 1950-1952 | |||||
| 1953-1954 | N/A | White square house on iron columns. | USCG Light List - Vol. I-VI: 1708 | ||
| 1955 | N/A | N/A | 37 | White skeleton tower, white house. | USCG Light List - Vol. I-VI: 1708 |
| 1957 | White skeleton tower, small white house. | ||||
| 1959-1960 | USCG Light List - Vol. I-V: 1834 | ||||
| 1961 | USCG Light List - Vol. I: 1834 | ||||
| 1963-1965 | |||||
| 1966 | USCG Light List - Vol. I: 2171 | ||||
| 1969-1973 | |||||
| 1974-1979 | NB on skeleton tower, small white house. | ||||
| 1982 | |||||
| 1987 | USCG Light List - Vol. I: 38765 | ||||
| 1990-1992 | USCG Light List - Vol. II: 2170 | ||||
| 1993-1996 | USCG Light List - Vol. II: 2415 | ||||
| 2004 |
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1831 - 1954 (Approximate 1908 location: locations of all lights prior to modern light are assumed to be close.) |
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1955 - Present |