Table A1 (Continued) 



Event 



Date 



Detail 



Source 



East Hampton 

 groins 



1965 



2 groins built by USAED, NY, at East Hampton (east of 

 inlet). In addition, 2 smaller groins built by New York State. 



USAED, New York 

 1988 



Westhampton 

 groins 



1969-1970 



4 more groins built west of 1 1 -groin field at Westhampton 

 Beach by USAED, NY. 



USAED, New York 

 1988 



Sediment budget 



1983 



RPI study commissioned for Reformulation Plan: 367,000 

 yd 3 /year enters control volume; 247,000 yd 3 /year leaves; 

 approx 1 00,000 yd 3 /year deposited on ebb shoal. (Note; 

 RPI study considered deficient and generally unsatisfactory 

 by USAED, NY, reviewers. Computations and conclusions 

 have therefore not been used for planning or design.) 



Research Planning 

 Institute 1983 



Dredging 



1984 



Currituck removed 176,000 yd 3 emergency dredging from 

 various locations in inlet to -14 ft mlw. Disposal west of 

 inlet at -10 ft mlw. 



Project notes, 

 Construction Div., 

 USAED New York, 

 11/13/95 



Dredging 



Oct 1-23, 1990 



668,000 yd 3 dredged from deposition basin (across ebb 

 shoal). Disposal: 



1 . 1 38,000 yd 3 west of west jetty. 



2. 77,000 yd 3 to fill scour hole by west jetty 

 (channel side). 



3. 193,000 yd 3 stockpiled on east side of inlet to 

 use as fill behind revetment. 



4. 260,000 yd 3 at Ponquogue Beach. 

 Sand placed in scour hole lost within 1 year. 



Project notes, 

 Construction Div., 

 USAED New York, 

 11/13/95 



Deposition basin 



1990 to 1993 



Basin anticipated to fill with = 425,000 yd 3 in 1 8 months. 

 Unexpected result: almost no infilling over time. From 

 1 990-93, <200,000 yd 3 was found in area, but not in 

 prescribed basin. 



Ms. Lynn Bocamazo, 

 USAED, New York, 

 personal 

 communication, 

 12/10/97 



Jetty repair 



May 1992 to 

 1993 



Repair of jetties, including construction of revetment along 

 northeast shore of inlet within Shinnecock Bay to prevent 

 erosion. 



Ann. Rept. of Chief of 

 Engr. 1992 



Dredging 



Jan 29 - May 14, 

 1993 



475,000 yd 3 dredged from deposition basin (ebb shoal). 

 Disposal: 



1. 371 ,000 yd 3 west of W. Jetty. 



2. 1 04,000 yd 3 to fill scour hole. 



Project notes, 

 Construction Div., 

 USAED New York, 

 11/13/95 



Dune Road repair 



March 1993 



Stone placed parallel to road. Beach filled between road 

 and stone row. 



Mr. Bill Daley, NY 

 State Dep. 

 Environmental 

 Conservation, 

 personal communi- 

 cation 12/10/97 



SHOALS survey 



Jun 1994 



Survey of Shinnecock Inlet and ocean shore between 

 Moriches and Shinnecock Inlets using USACE SHOALS 

 helicopter LIDAR survey system. Uncertainty with tidal 

 datum corrections. 



CERC data 



(Sheet 4 of 5) 



Appendix A Chronological List of Geological Events 



A5 



