Accession Number : ADA314656

Title :   Dredging Operations Technical Support Program. Effectiveness of a Sea Turtle-Deflecting Hopper Dredge Draghead in Port Canaveral Entrance Channel, Florida.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s) : Nelson, David A. ; Shafer, Deborah J.

PDF Url : ADA314656

Report Date : AUG 1996

Pagination or Media Count : 47

Abstract : Periodic maintenance dredging of coastal navigation channels is required to maintain the depth necessary for the passage of large commercial and military ship traffic. Sea turtles and other threatened and endangered species may become entrained in the hopper dredge intake pipes, causing the turtles to be crushed or drowned. To prevent this entrainment, a new draghead design was developed to deflect sea turtles from the path of the draghead. Preliminary tests indicated that this design was effective in reducing entrainment of inanimate objects in the path of the draghead without compromising production (Banks and Alexander 1994). The following study was conducted to test the effectiveness of the rigid deflector draghead under field conditions in an area of probable moderate-to-high sea turtle abundance.

Descriptors :   *ENDANGERED SPECIES, *DREDGING, *TURTLES, MAINTENANCE, SHIPS, COASTAL REGIONS, COMMERCE, PRODUCTION, TRAFFIC, MILITARY VEHICLES, NAVIGATION, WATER TRAFFIC, RIGIDITY, CHANNELS, FIELD CONDITIONS, PERIODIC FUNCTIONS, DEFLECTORS.

Subject Categories : Biology
      Ecology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE