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DREDGING YOUR DOCKS 2013

DREDGING YOUR DOCKS 2013. Supported by:. USACE Galveston District U. S. Coast Guard Sabine Neches Navigation District. DREDGING YOUR DOCKS 2013. Organized By:. CRA Hydrographic Surveyors Orion Marine Group. DREDGING YOUR DOCKS 2013. Dredging Private Terminal. Permits

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DREDGING YOUR DOCKS 2013

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  1. DREDGING YOUR DOCKS 2013 Supported by: USACE Galveston District U. S. Coast Guard Sabine Neches Navigation District

  2. DREDGING YOUR DOCKS 2013 Organized By: CRA Hydrographic Surveyors Orion Marine Group

  3. DREDGING YOUR DOCKS 2013 Dredging Private Terminal

  4. Permits • Hydrographic & Pre-Dredge Survey • Dredge Material Placement Areas • Sediment Sampling • Dredging Method Selection • Cost & Scheduling • Dredge Project Management • Post Dredge Closeout

  5. PERMITS • Maintaining a current USACE permit, includes: • Current date, owner& information • Execute a time extensions - 10 years, if required • Amendment to add any potential DMPA • Confirm dredge methods • Submit any amendments for any new construction • Approval process and or public notice • Confirm USACE final approval

  6. USACE Consent to Easement • Obtained thru the real-estate department • Required prior to dredging in any USACE DMPA. • Documents the disposal fees due to the USACE.

  7. PERMITS • Nation Wide #35 • The NWP #35 can be utilized for certain maintenance project. • Dredging can be performed to previous authorized depths. • Material must be deposited in upland site with proper siltation controls.

  8. PERMITS • TCEQ • Water Quality Certification • Require owners to obtain a Water Quality Certification from the TCEQ • TCEQ requirements 300 mg/l (TSS) or less suspended solids. • It takes about s 1 to 2 weeks to obtain the certification.

  9. PERMITS • Navigation Districts & Private DMPA • Usually requires site specific criteria: • Surveys • Sediment sampling • Payments • Contract terms. • Should be documented on the USACE

  10. HYDROGRAPHIC & PRE-DREDGE SURVEY Hydrographic Surveys

  11. HYDROGRAPHIC & PRE-DREDGE SURVEY Hydrographic Surveys • Survey Recommendations –annually • Calculates siltation rates & dredge cycles • Help evaluates annual dredge budgets • Documents pre- post storm elevations • Provides pilots & customers with depth data

  12. HYDROGRAPHIC & PRE-DREDGE SURVEY Pre-Dredge Survey • Pre-Dredge Survey within two Weeks • Compare Contractors with 3rd Party • Verify, Quantities, Tide Gauge, & intervals • Verify survey datum and station #’s • Include over-dredge and side slopes

  13. Pre-Dredge Survey

  14. Pre-Dredge Survey

  15. DREDGE MATERIAL PLACEMENT AREA • DMPA selection • Location • Permit • Cost • Availability

  16. DREDGE MATERIAL PLACEMENT AREA • Submittal & Approval Process • Application Fee • Submittal of survey • Dredge quantities • Sediment samples • Approval of application & sediment samples • Contract Signing & Deposit (if required)

  17. SEDIMENT SAMPLING • Sediment sampling criteria. • Sampling technique. • Number of sediment samples required. • Understand submittal & approval process. • Acceptable, discretionary, & disapproved. • Schedule enough time submittal & review process.

  18. SEDIMENT SAMPLING • Analytical Testing • Metals • Organics • Hydrocarbons • Pesticides • Sample result are usually acceptable for 6 months to one year period

  19. SEDIMENT SAMPLING • Field work • Lab analysis • Final report • Submittal process • Approval • ***It takes approximately two week to obtain a final report***

  20. DREDGING METHOD SELECTION • Hydraulic • Mechanical • Mechanical/hydraulic offloading • Hopper dredging

  21. HYDRAULIC DREDGING • Traditional diesel powered dredge • Dredges available in different sizes • Material is pipelined to spoil area • Can move larger volumes of material • Requires a larger spoil area

  22. MECHANICAL DREDGING • Can be used for relief dredging • Several types of mechanical systems • Requires multiple handling of material • Material can be transported by barge • Spoil does not contain much water

  23. MECHANICAL HYDRAULIC OFF-LOADING • Hydraulic or electric powered • Deployed by a crane barge • Normally used for short distance pumps

  24. COST & SCHEDULING

  25. COSTS INCREASES • Fuel Costs • Steel Costs • Disposal Costs • Bonds & Insurance • Operating & Labor

  26. FUEL COSTS

  27. STRUCTURAL STEEL COSTS (per ton.)

  28. DISPOSAL COSTS (per cu/yd.)

  29. DISPOSAL COSTS • Availability of suitable DMPA’s. • Increase in operating cost. • Land acquisitions.

  30. OTHER COST INCREASES • Construction Costs • Government regulations • Distance to disposal areas • Emission restrictions

  31. SCHEDULING Permit amendments – 1 to 6 months DMPA application 2 to 5 weeks Sediment sampling – 2 weeks DMPA contracts – 1 to 4 weeks TCEQ Water Quality Certification – 1 to 2 weeks Pre-dredge survey – 1 week Dredge mobilization & pipeline – 2 to 4 weeks ***Coordinate with dredge availability***

  32. SCHEDULING • Notification to customers • Coordination with vessel traffic • Actual dredge time at dock • Channel closures

  33. DREDGE PROJECT MANAGEMENT • Select contractor • Notice to mariners • Pre-construction meeting • Vessel & dredge scheduling • Dredge pipeline installation

  34. DREDGE PROJECT MANAGEMENT • Dredging • Manage & test effluent discharge • Coordinate vessel traffic • Debris & trash • Schedule docks • Daily time tickets • Interim surveys • Post dredge survey

  35. POST DREDGE CLOSEOUT • Review dredge daily logs, and time tickets • Review contractors & 3rd party post dredge survey • Evaluate the results • Mutually agree on a quantities • Submit to DMPA Owner • Pay disposal fees • Pay contractor

  36. PROJECT PLANNING Periodic hydrographic survey Review sedimentation rates Establish dredge cycles Be aware USACE projects Coordinating with neighboring facilities

  37. PROJECT PLANNING – Cont. Keep permits up to date Have a dredging relief plan DMPA applications & contracts Establish alternate DMPA Consider on-site disposal options

  38. THANK YOU FOR ATTENDING DREDGING YOUR DOCKS 2013

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