Dredges Built in the U.S. Since WWII

Most recent update: May 9, 2020.
Until 1960, most of the dredging of U.S. ports and waterways was done by the Corps of Engineers, using their own equipment.  In the early 1960s, however, the Merchant Marine Act was modified to allow private-sector contractors to take up the load: in addition, the Jones Act was modified to include dredge spoil.  As a result, all the new private-sector dredges had to be US-built as well as US-operated.  These changes resulted in all but one of the Corps' dredges being retired and there was a boom in private-sector dredge construction in the 1970s and 80s.  The table below lists all the large dredges built since WWII by year built.  If anyone sees any errors or omissions, please send your info to me at timcolton@aol.com
Shipbuilder Location Hull # O.N. Original Name Original Owner Type of Dredge Capacity (CY) GT LOA Price ($mm) Del'd. Disposition
Corps of Engineers Dredges (13)
Ingalls SB Pascagoula MS 500 na Comber Corps of Engineers TSHD 2,300 6,000 352   1947 Scrapped
Ingalls SB Pascagoula MS 501 na Gerig Corps of Engineers TSHD 2,300 6,000 352   1947 Scrapped 1991
Ingalls SB Pascagoula MS 502 na Langfitt Corps of Engineers TSHD 2,300 6,000 352   1947 Scrapped
Ingalls SB Pascagoula MS 503 na Biddle Corps of Engineers TSHD 2,300 6,000 352   1947 Scrapped
Sun Ship Chester PA 565 na Essayons Corps of Engineers TSHD 6,100 12,000 525   1950 Scrapped
Avondale Avondale LA 904 na Markham Corps of Engineers TSHD 2,070 5,400 339   1960 Reefed 1994
Bethlehem Steel Sparrows Point MD 4608  na McFarland Corps of Engineers TSHD 3,140 6,000 300 15 1967 Active
Norshipco Norfolk VA 168 na Yaquina Corps of Engineers TSHD 1,020 1,960 193 14 1981 Active
Avondale Avondale LA 2322 na Wheeler Corps of Engineers TSHD 8,256 12,000 381 67 1982 Active
Bath Iron Works Bath ME 402 na Essayons Corps of Engineers TSHD 6,000 12,000 350 65 1982 Active
Halter Marine Moss Point MS 1247 na Hurley Corps of Engineers DP     350   1983 Active
LeTourneau Ind. Vickburg MS 229 na Goetz Corps of Engineers CSD   200 2005 Active
Conrad SY Morgan City LA 896 na Murden Corps of Engineers TSHD     150   2012 Active
Commercial Dredges (40)
Tampa Marine Tampa FL   Export Roosevelt Mining Equipment Co.     3,800     1947 Scrapped
Tampa Marine Tampa FL   Export Stuyvesant Mining Equipment Co.     3,800     1947 Scrapped
Gulfport SB Port Arthur TX 341 Export Ciudad de Barranquilla Govt. of Colombia     3,715     1949 Scrapped 1984
Todd Houston Houston TX 245 283416 Alaska Great Lakes Dredge & Dock CSD   1,433 220   1960 Active
American Marine New Orleans LA   290028 Pontchartrain Great Lakes Dredge & Dock CSD   656 170   1962 Active
Avondale Avondale LA 1019 292779 California Great Lakes Dredge & Dock CSD   1,109 190   1962 Active
NASSCO San Diego CA 332 506446 Sensibar Bros. Sensibar Brothers CSD   1,109 190   1962 Now Florida
Avondale Avondale LA 1033 292613 Fritz Jahncke Jahncke Services CSD   1,300 186   1963 Now G. D. Morgan
Todd Houston Houston TX 567 532555 Ezra Sensibar Sensibar Brothers TSHD 16,000 10,300 500   1971 Later Long Island, scrapped
Bean, C. F. Belle Chasse LA 30 552707 Jim Bean Great Lakes Dredge & Dock CSD   2,349 263   1973 Now Carolina
Avondale Avondale LA 2269 560225 G. L. 54 Great Lakes Dredge & Dock CSD   1,100 185   1973 No longer active
Avondale Avondale LA 2302 580274 Illinois Great Lakes Dredge & Dock CSD   1,400 220   1977 Active
Southern Sbldg. Slidell LA 117 583706 Manhattan Island Ballast Nedam Dredging TSHD 3,600 2,400 281 14 1977 Active (Marshall I.)
Zidell Marine Portland OR 607 592239 Westport Manson Construction Co. TSHD 1,800 851 180   1978 Active
Southern Sbldg. Slidell LA 119 606519 Sugar Island Ballast Nedam Dredging TSHD 3,600 2,400 281 14 1979 Active (Marshall I.)
Bergeron Braithwaite LA 1123 627368 Texas Great Lakes Dredge & Dock CSD   3,479 305   1979 Active
Twin-City Dock Saint Paul MN 552 630008 Atchafalaya Gulf Coast Dredging TSHD 1,300 850 195   1980 Active
Southern Sbldg. Slidell LA 120 625328 Dodge Island Ballast Nedam Dredging TSHD 3,600 2,400 281 16 1980 Active
Twin-City Dock Saint Paul MN 668 643740 Mermentau Gulf Coast Dredging TSHD 1,300 850 195   1981 Active (Colombia)
Avondale Avondale LA 2320 630823 Eagle 1 Bean Dredging TSHD 6,600 5,700 316 38 1981 Now Terrapin Island
Southern Sbldg. Slidell LA 123 639291 Padre Island Ballast Nedam Dredging TSHD 3,600 2,400 281 18 1981 Active
Avondale Avondale LA 2332 648540 Stuyvesant Stuyvesant Dredging TSHD 11,200 7,110 368 30 1982 Active
Barnett Marine New Orleans LA 98 654551 Meridian Bean-Horizon, Inc. CSD   1,693 113   1982 Now E. W. Ellefsen
Moss Point Marine Escatawpa MS 25 644880 Beachbuilder Great Lakes Dredge & Dock CSD   3,005 275   1982 Now Ohio
Nichols Bros. Freeland WA 67 658434 Newport Manson Construction CSD   2,500 262   1983 Active
Southern Sbldg. Slidell LA 126 664129 Northerly Island Ballast Nedam Dredging TSHD 2,160 2,400 281 25 1983 Active (Marshall I.)
Twin-City Dock Saint Paul MN 885 685093 Ouachita Gulf Coast Dredging TSHD 4,150 3,400 295 25 1985 Now B. E. Lindholm
McDermott SB Amelia LA 276 908078 Atlantic American Atlantic American Dredging TSHD 4,000 2,700 292 14 1987 Now R. N. Weeks
Gunderson Portland OR 44 1048828 Bayport Manson Construction Co. TSHD 5,000 2,151 300   1996 Active
Gunderson Portland OR 47 1073113 Mr. Manson II Manson Construction Co. CSD   1,694 215   1997 Now H. R. Morris
Great Lakes Dredge Chicago IL 17 1142982 Arizona Great Lakes Dredge & Dock CSD   646 220   1997 Active
Bay Shipbuilding Sturgeon Bay WI 744 1077537 New York Great Lakes Dredge BD   1,485 200   1999 Active
Bay Shipbuilding Sturgeon Bay WI 746 1117966 Liberty Island Great Lakes Dredge TSHD 6,540 5,300 315 52 2002 Active
Bay Shipbuilding Sturgeon Bay WI 747 1102692 James B Lake Michigan Contractors CSD   1,679 247   2002 Now Charleston
Alabama Mobile AL 100 1180182 Glenn Edwards Manson Construction TSHD 9,180 9,500 711   2006 Active
Eastern Shipbuilding Panama City FL  253 1256673 Ellis Island Great Lakes Dredge TSHD   9,976 374   2017 Active
Eastern Shipbuilding Panama City FL  256 1266740 Magdalen Weeks Marine TSHD   7,581 326   2017 Active
Corn Island SY Lamar IN 323 1266767 Weeks 321 Weeks Marine TSHD   4,366 340   2018 Active
C & C Marine Houma LA 307 1278460 J. S. Chatry Weeks Marine TSHD   4,811 310   2019 Active
Eastern Shipbuilding Panama City FL  258   R. B. Weeks Weeks Marine TSHD   7,581 326   2023 Building