Dredging 101 Dredging and Disposal Workshop

Transcription

1 Dredging 101 Dredging and Disposal Workshop Christopher Frabotta Chief, Navigation Branch U.S. Army Corps of Engineers Galveston District July 24, 2012 US Army Corps of Engineers BUILDING STRONG BUILDING STRONG

2 Navigation Mission Provide safe, reliable, efficient and environmentally sustainable waterborne transportation systems (channels, harbors, and waterways) for movement of commerce, national security needs, and recreation.

3 Galveston District Facts 50,000 sq-mile district boundary 460 miles of coastline 48 Texas Counties 18 Counties Coastal Bay Estuaries Texas Gulf System 3 LNG 346 full time employees 760 miles shallow draft 240 miles deep draft 13 shallow draft ports 15 deep draft ports Texas Ports and Waterways moved 575M 3 Strategic Ports

4 BUILDING STRONG

5 Tonnage for Top Ten U.S. Ports in 2010 (Millions of Tons) South Louisiana, LA Houston, TX New York, NY 73.7 Beaumont, TX Long Beach, CA Corpus Christi, TX New Orleans, LA Los Angeles, CA Huntington, Tristate Texas City, TX

6 Tonnage of Commerce U.S. Inland Waterways GIWW

7 Project Delivery Team

8 DREDGING METHODS TYPES OF DREDGES Mechanical Dredges Clamshell Dipper Backhoe Dragline Pipeline Dredges Cutterhead Dustpan Trailing Suction Hopper Dredge

9 Mechanical Dredges Dredges Clamshell Dredge with Scow Dipper Dredge Source: IHC Holland Backhoe Dredge

10 Clamshell Dredges Clamshell Dredge Source: Great Lakes Dredge & Dock Source: The Dutra Group

11 Clamshell Dredge Clamshell Dredge Source: Manson Construction and Engineering Co.

12 Backhoe Dredge Backhoe Dredge Source: The Dutra Group

13 Dragline Dredging Dragline Dredging Source: The Dutra Group

14 Hydraulic Pipeline Dredge (Cutterhead Dredge)

15 Cutterhead Suction Dredges Dredges

16 Cutterhead Dredge in in Operation

17 Types Types of of Cutterheads

18 Cutterhead with Rock Teeth Cutterhead with Rock Teeth Source: Great Lakes Dredge and Dock Co.

19 Cutterhead Dredge DREDGE TEXAS Idler Barge w/ Spud Carriage

20 Hydraulic Pipeline Dredge (Dustpan Dredge) Hydraulic Pipeline Dredge (Dustpan Dredge)

21 Dustpan Dustpan Dredge in in Operation

22 Trailing Suction Hopper Dredge Trailing Suction Hopper Dredge (Hopper Dredge) (Hopper Dredge) Source: IHC Holland

23 U.S. Hopper Fleet U.S. Hopper Fleet 1. Glenn Edwards 13,800 CY Stuyvesant 11,140 CY Wheeler 8,000 CY Liberty Island 6,540 CY Terrapin Island 6,400 CY Essayons 6,000 CY Bayport 5,000 CY Columbia 4,425 CY Newport 4,000 CY BE Lindholm 4,000 CY RN Weeks 4,000 CY Padre Island 3,600 CY Dodge Island 3,600 CY McFarland 3,140 CY Westport 1,500 CY Atchafalaya 1,300 CY 1980

24 Trailing Suction Hopper Dredge Trailing Suction Hopper Dredge (Hopper Dredge) (Hopper Dredge) Source: IHC Holland

25 Hopper Dredge in Operation Hopper Dredge in Operation Source: Great Lakes Dredge and Dock Co.

26 Split-Hull Hopper Dredge Split-Hull Hopper Dredge Source: Bean-Stuyvesant Dredging

27 Hopper Dredge with Hydraulic Disposal Doors

28 Turtle Turtle Exclusion Device

29 Disposal Methods Mechanical Dredges Scow to Offshore Dredged Material Disposal Site (ODMDS) Mechanically hauled Pipeline Dredges Upland Confined Placement Area (CPA) Semi-Confined (Control-of-Effluent Placement) Beach Placement Scow-to-ODMDS Trailing Suction Hopper Dredge ODMDS Near-Shore Feeder Berm Pump-out Beach Placement CPA Semi-Confined, etc.

30 Mechanical Dredging with Scow Disposal to ODMDS

31 Disposal Methods Mechanical Dredges Scow to Offshore Dredged Material Disposal Site (ODMDS) Mechanically hauled Pipeline Dredges Upland Confined Placement Area (CPA) Semi-Confined (Control-of-Effluent Placement) Beach Placement Scow-to-ODMDS Trailing Suction Hopper Dredge ODMDS Near-Shore Feeder Berm Pump-out Beach Placement CPA Semi-Confined, etc.

32 Aerial of Confined Placement Area Aerial of Confined Placement Area (Houston Ship Channel - Lost Lake Placement Area) (Houston Ship Channel - Lost Lake Placement Area)

33 Aerial of Confined Placement Area Aerial of Confined Placement Area (Houston Ship Channel - Lost Lake Placement Area) (Houston Ship Channel - Lost Lake Placement Area)

34 Aerials of Spillway Structures Aerials of Spillway Structures (Houston Ship Channel - Lost Lake Placement Area) (Houston Ship Channel - Lost Lake Placement Area)

35 Interior of Confined Placement Area Interior of Confined Placement Area (Levees & Spillway Structure) (Levees & Spillway Structure)

36 Interior of Confined Placement Area Interior of Confined Placement Area (Levees & Spillway Structure) (Levees & Spillway Structure)

37 Semi-Confined Placement Area Semi-Confined Placement Area (Bolivar Marsh Creation Beneficial Use of Dredged Material) (Bolivar Marsh Creation Beneficial Use of Dredged Material)

38 Semi-Confined Placement Area Semi-Confined Placement Area (Bolivar Marsh Creation Beneficial Use of Dredged Material) (Bolivar Marsh Creation Beneficial Use of Dredged Material)

39 Semi-Confined Placement Area Semi-Confined Placement Area (Bolivar Marsh Creation Beneficial Use of Dredged Material) (Bolivar Marsh Creation Beneficial Use of Dredged Material)

40 Semi-Confined Placement Area Semi-Confined Placement Area (Bolivar Marsh Creation Beneficial Use of Dredged Material) (Bird Island Creation Beneficial Use of Dredged Material)

41 Pipeline Dredge with Beach Placement

42 Pipeline Dredge with Beach Placement

43 Pipeline-to-Scow-to-ODMDS

44 Disposal Methods Mechanical Dredges Scow to Offshore Dredged Material Disposal Site (ODMDS) Mechanically hauled Pipeline Dredges Upland Confined Placement Area (CPA) Semi-Confined (Control-of-Effluent Placement) Beach Placement Scow-to-ODMDS Trailing Suction Hopper Dredge ODMDS Near-Shore Feeder Berm Pump-out Beach Placement CPA Semi-Confined, etc.

45 Hopper Dredge with Pump out to Beach

46 Hopper Hopper Dredge Dredge with Pump with Pump-out

47 Beach Placement Pipeline or Hopper Pump out

48 Project Delivery Team

49 Budget Cycle Timeline Budget Cycle Timeline

50 Questions

51 BUILDING STRONG