S7 29C ■ "ace , 



REPORT DOCUMENTATION PAGE 



Form Aoore m ma 

 QMt NO. OTOtJilU 



iii«ninir»ii lOf r***!"* ifw enrin lo wwiiio w >w»»«w«ntn •< ar-ntwi. Oi» 

 '» iiiOi^iOi*'*'^"^'^**"*^ * """" '" "" *'**''*°'' »ic«»»ow »" 



p«vi««Hfio imtnicTJOfn. Maroim^ tvnuAa uu wuftvt. 



IMH14 imt oiiffi«w «ttima» or amr omor noan of rni^ 



. lor ififomutMR Oosnuom «w Maora. i]il jti m i u ii 



WOWCT 10704^ IMI. W«IIMIM I O«. OC 20M1. 



1. AGtNCr USE ONLY ((.•«»• ottnK) 



1. REPORT DATE 

 ^^AuEUStl995_ 



J. REPORT TYPE ANO DATES COVERED 



Final Renort 



4. TTTLE ANO SUSTrUE 



Monitoring Cruise at the Central Long Island Sound Disposal Site 

 July 1990 



t. AUTHOR(S) 



J. D. Germano, J. Parker, and M. B. Wiley 



7. PERFORMING ORGANIZATION NAME<S) ANO AOORESS(ES) 



Science Applications International Corporation 

 221 Third Street 

 Newport, RI 02840 



9. sponsoring; MONITORING AGENCY NAM£(S) ANO AOORESS(ES) 



U.S. Army Corps of Engineers - New England Division 

 424 Trapelo Road 

 Wahham, MA 02254-9149 



S. FUNDING NUMIERS 



8. PERFORMING ORGANUAHON 

 REPORT NUMBER 



SAIC-90/7594&C89 



10. SPONSORING/ MONITORING 

 AGENCY REPORT NUM«ER 



DAMOS Contribution No. 94 



11. SUPPUMENTARV NOTES 



Available from DAMOS Program Manager, Regulatory Division 

 USACOE-NED, 424 Trapelo Road, Waltham, MA 02254-9149 



12a. OISTRISUTION/AVAILABIUTY STATEMENT 



Approved for public release; distribution unlimited. 



12b. OlSTRiaUTION CODE 



13. ABSTRACT (M4<imumi 00 worosi 



A monitoring survey was conducted at the Central Long Island Sound Disposal Site (CLIS) from July 18 to 23, 1990 as part of the 

 Disposal Area Monitoring System (DAMOS) Program. The objectives of the July 1990 field operations were to delineate the extent and 

 topography of the recently deposited dredged material, to rheasure near-bottom and near-surface dissolved oxygen concentrations and vertical 

 profiles of temperature and salinity at selected disposal site and reference stations, and to collect additional baseline sediment grain size and 

 chemistry samples from the reference areas. The data included precision bathymetry. Remote Ecological Monitoring of the Seafloor 

 (REMOTS®) sediment-profile photography, conductivity, temperature, and depth (CTD) measurements and dissolved oxygen information, and 

 sediment grab samples. 



The precision bathymetric survey detected disposal mounds CLIS-88, CLIS-89, and CS-9O7I formed since the 1988 survey. The 

 dredged material did form the distinct mounds predicted at the CLIS-88 and CLIS-89 buoy locations. However, the diameter of CLIS-89 was 

 smaller than expected, 200 versus 250 m, and the diameter of CLIS-88 was larger than expected without forming a distinct separate mound due 

 to the proximity of CLIS-87. 



At CS-90-1, material unsuitable for unconfined open water disposal was capped with clean material. Based on the dredged material 

 footprint detected by an earlier REMOTS® survey, cap material was released at eight locations on the CS-90-1 deposit The amount of cap 

 material over portions of the mound flank was less than 20 cm. Additional cap material and alternate disposal patterns are recommended. 



Benthic recolonization was determined from the analysis of REMOTS® photographs obtained at CLIS and at three outlying reference 

 areas. The recolonization predictions were accurate at CLIS-89, with Stage I taxa predominating. At CS-90-1, Stage I taxa occurred 200 m 

 southwest of the buoy locatiorL Most of the remairoing site stations and the reference stations had Stage III assemblages. Dissolved oxygen 

 values ranged from 3.4 to 6.34 mgxl'', indicating the absence of hypoxia. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 



14. SUOiECT TERMS 



dredged material 

 monitoring 



cappmg 

 ocean disposal 



contaminated sediment 

 sediment chemistry 



IS. NUMBER OF PACES 



38 



1«. PRICE CODE 



17. SECURITY CLASSIFICATION 

 OF REPORT 



18. SECURITY CLASSIFICATION 

 OP THIS PAGE 



SECURITY CLASSIFICATION 

 OP ABSTRACT 



20. UMITATION OF ABSTRACT 



NSN ;S4O-01-2S0-350O 



Standara i=orm 298 (Rev i-i'i) 

 » iiuiu— D» ^MM ua. u%'* 



