REPORT DOCUMENTATION PAGE 



Form approved 

 OMB No. 0704-0188 



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 any other aspect of this collection of information Including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information 

 Observations and Records. 1215 Jetterson Davis Highway, Suite 1204, Arlington VA 22202-4302 and to the Office of r/lanagement and Support, Paperwork Reduction 

 Project (0704-0188), Washington, DC. 20503 



1. AGENCY USE ONLY (LEAVE BLANK) 



2 REPORT DATE 



October 1995 



. REPORT TYPE AND DATES COVERED 



Final report 



TITLE AND SUBTITLE 



Monitoring Cruise at the Massachusetts Bay Disposal Site March 31-April 4, 1992 



5. FUNDING NUMBERS 



6. AUTHOR(S) 



Mary Baker Wiley and 

 Ju(Jith B. Charles 



7. PERFORtt^ING ORGANIZATION NAtME(S) AND ADDRESS(ES) 



Science Applications International Corporation 

 221 Thrid Street 

 Newport, Rl 02840 



B. PERFORfVIING ORGANIZATION REPORT 

 NUMBER 



SAIC-C103 



9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 



US Army Corps of Engineers-New England Division 

 424 Trapelo Road 

 Waltham. MA 02254-9149 



10. SPONSORING/ MONITORING AGENCY 

 REPORT NUMBER 



DAMOS Contribution 

 Number 100 



11. SUPPLEMENTARY NOTES 



Available from DAMOS Program Manager, Regulatory Division 

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



12a. DISTRIBUTION/AVAILABILITY STATEMENT 



Approved for public release; distribution unlimited 



12b. DISTRIBUTION CODE 



13. ABSTRACT (MAXIMUM 200 WORDS) 



A monitoring survey was conducted at the Massachusetts Bay Disposal Site (MBDS) from March 30 to April 4, 

 1992 as part of the Disposal Area Monitoring System (DAMOS). The previous bathymetric/REMOTS monitoring surveys at 

 MBDS occurred in August 1990. Since that time, MBDS has been subject to two major stomns, Hurricane Bob and the 

 Halloween Storm. In addition, initiation of a major construction project in the Boston area , the Central Artery/Thrid Harbor 

 Tunnel (CA\THT) project, resulted in increased disposal activity at the site. The objectives of the 1 992 field work were to 

 map the distribution and thickness of dredged materials that MBDS received following the 1990 survey, and to assess the 

 status of the benthic communities around the reference site. 



Surveying and monitoring were conducted with precision bathymetry and REMOTS sediment profile photography. 

 It was predicted that 



1) the dredged materials disposed since 1990 would have increased the size of the mound detected by 

 bathymetry in 1990; 



2) the benthic communities at the reference areas would be similar to those found in the 1 990 survey; 



3) benthic infauna (Stage III taxa) would be absent around the disposal buoy due to the presence of fresh 

 Boston Blue Clay. 



The precision bathymetric survey detecrted the maximum thickness of the disposal mound approximately 100 m 

 west of the buoy. Dredged material detected by the 1992 REMOTS survey extended 600 m east, 400 m south, 800 m 

 west, and 400 m north of the buoy location. The results of the survey showed there to be no substantial resuspension or 

 transport of dredged material occurred as a result of Hurricane Bob and the Halloween Storm. 



The benthic communities at the reference areas and at the stations away from the center of the disposal mound 

 contained Stage III taxa, indicative of a well-colonized, healthy benthic community. Evidence benthic recolonization at the 

 mound and the abundance of Stage III infauna at the disposal site and reference area stations indicate no severe 

 disturtance from disposal activities or from the two storms in 1991. 



14. SUBJECT TERMS 



MBDS DAMOS bathymetric benthic REMOTS sediment dredging 



15. NUMBER OF PAGES 

 _23 



16. PRICE CODE 



17. SECURTTY CLASSIFICATION OF REPORT 



Unclassified 



18. SECURPTY CLASSIFICATION OF THIS 

 PACE 



19. SECURITY CLASSIFICATION OF 

 ABSTRACT 



20. UMITATION OF ABSTRACT 



