(a) 23 September 1935
(b) 3 July 1937
After Shoreward Breach
After Shoreward Breach
(c) 1941
(d) 1955
After Shoreward Breach
After East Jetty Repair and
Shoreward extension
Figure 4-26b. Mattituck Inlet east bank spit morphology, 1935-1955, with jetty
configuration of 1914 and 1946 included for reference
Condition survey maps indicate that the present configuration of the Federal
navigation channel was introduced, and maintenance dredging took place, during
the period October-November 1950 (Tables 2-5 and 2-6). The post- dredging
survey of September-November 1946 and the pre-dredging survey of
4-6 October 1950 indicate that much of the east bank spit was left intact.
Removal of the portion of the flood shoal that was located within the location of
the new navigation channel apparently involved the dredging of an estimated
10,000-12,000 cu yd of sediment. This value accounts for approximately 40 to
50 percent of the 22,913 cu yd of sediment dredged in OctoberSeptember 1950.
Figure 4-27 illustrates the configuration of the Federal navigation channel prior
to and after 1950.
139
Chapter 4 Morphology Change, and Channel Shoaling and Migration