REPORT DOCUMENTATION PAGE 



OMB Ma 07TU-O1U 



i. REPORT OATE 

 August 1993 



J. REPORT TYPE AND OATES COWSHED 

 Final Report 



4. mu AMO SUBTITLE 



Monitoring Cruise at the Cape Cod Canal Disposal Site and 

 Springhill Beach Site, March 1990 - April 1990 



S. FUNDING NUMBERS 



fc. AUTHORtS) 



7. PERFORMING ORGANIZATION NAME(S) AMO AOORES5US) 



Science Applications International Corporation 

 221 Third Street 

 Newport, RI 02840 



9. SPONSORING. MONITORING AGENCY NAMEiSI ANO AOORESSUSi 



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

 424 Trapelo Road 

 Waltham, MA 02254-9149 



8. PERFORMING ORGANIZATION 

 REPORT NUMBER 



SAIC-90/7577 & C85 



10. SPONSORING / MONITORING 

 AGENCY REPORT NUMBER 



DAMOS Contribution No. 84 



11. SUPPLEMENTARY NOTES 



Available from DAMOS Program Manager, Regulatory Division 

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



U*. DISTRIBUTION / AVAILABILITY STATEMENT 



Approved for public release; distribution unlimited. 



UB. DISTRIBUTION CODE 



IBS TRACT tM*Mtmum tOQ mora) 



The Cape Cod Canal serves as a major thoroughfare for recreational and commercial vessels transiting Massachusetts 

 waters. For this reason, maintenance dredging of the east end of the Cape Cod Canal and improvement dredging of the East Mooring 

 Basin were conducted by the U.S. Army Corps of Engineers during the spring of 1990. The fine grained sediments from these 

 projects were released at the Cape Cod Canal Disposal Site (CCDS) and the sandier material was sent to Springhill Beach. The CCDS 

 has been used periodically for similar dredging operations. The objective of disposal at Springhill Beach was to create a small feeder 

 berm. 



The fine grained material released at CCDS formed a mound 1.0 m in height within a 300 m radius of the "CCD" disposal 

 buoy. A comparison of pre- and postdisposal bathymetry generated a volume difference of 21 ,823 m' (95 % confidence limits of 

 10,739 0^ and 32,908 m*). This agreed closely with the barge log volume estimates of 15, 296 m 5 . The REMOTS* survey, 

 consisting of a 15 station east-west transect over a historic disposal mound at CCDS, showed recolonization by Stage II infauna near 

 the mound center. No distinct dredged material layers were present anywhere along the transect. However, the continued effect of 

 dredged material disposal was apparent at the center and eastern end of the survey while ambient conditions existed at the western end. 

 Scouring and winnowing were evident at some stations near the mound center. 



The depth difference analysis at the Springhill site revealed four distinct disposal mounds, ranging from 2.1 to 2.3 m in 

 height. General shoaling and redistribution of sediments around the area of the individual disposal mounds were apparent. Barge 

 disposal logs estimated 87,628 m' of material were deposited at the Springhill site. Volume calculations showed an estimated 83,972 

 m' (95% confidence limits of 67,736 and 98,208 m*) of dredged material had accumulated, indicating barge log records for both the 

 CCDS and Springhill sites were in good agreement with the survey calculations. Additional bathymetric surveys after a period of time 

 (e.g., six months) could provide evidence as to whether or not the Springhill site is seryijuiasjJeedexbejmjDrJhe_beach_area^ 



14. SUBJECT TERMS 

 Cape Cod Canal 

 dredged material 

 sediments 



REMOTS 



sediment profile photography 



bathymetry 



IS. NUMBER OF PAGES 



50 



Ik. PRICE CODE 



17. SECURITY CLASSIFICATION 

 OP REPORT 



IB. SECURITY CLASSIFICATION 

 OP THIS PAGE 



19. 



SECURITY CLASSIFICATION 

 OP ABSTRACT 



10. LIMITATION OF ABSTRACT 



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