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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 - PowerPoint PPT Presentation
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DREDGING YOUR DOCKS 2013Supported by:USACE Galveston District
U. S. Coast Guard
Sabine Neches Navigation District
DREDGING YOUR DOCKS 2013Organized By:CRA Hydrographic Surveyors
Orion Marine Group
DREDGING YOUR DOCKS 2013 Dredging
Private Terminal
PermitsHydrographic & Pre-Dredge SurveyDredge Material Placement Areas Sediment SamplingDredging Method SelectionCost & SchedulingDredge Project ManagementPost Dredge Closeout
PERMITS
Maintaining a current USACE permit, includes:Current date, owner & informationExecute a time extensions - 10 years, if requiredAmendment to add any potential DMPAConfirm dredge methods Submit any amendments for any new constructionApproval process and or public noticeConfirm USACE final approval
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.
PERMITSNation 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.
PERMITSTCEQ 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.
PERMITSNavigation Districts & Private DMPA
Usually requires site specific criteria:
SurveysSediment samplingPaymentsContract terms.Should be documented on the USACE
HYDROGRAPHIC & PRE-DREDGE SURVEYHydrographic Surveys
HYDROGRAPHIC & PRE-DREDGE SURVEYHydrographic Surveys
Survey Recommendations annuallyCalculates siltation rates & dredge cyclesHelp evaluates annual dredge budgetsDocuments pre- post storm elevationsProvides pilots & customers with depth data
HYDROGRAPHIC & PRE-DREDGE SURVEYPre-Dredge Survey
Pre-Dredge Survey within two WeeksCompare Contractors with 3rd PartyVerify, Quantities, Tide Gauge, & intervalsVerify survey datum and station #sInclude over-dredge and side slopes
Pre-Dredge Survey
Pre-Dredge Survey
DREDGE MATERIAL PLACEMENT AREA DMPA selectionLocationPermit CostAvailability
DREDGE MATERIAL PLACEMENT AREA
Submittal & Approval ProcessApplication FeeSubmittal of surveyDredge quantitiesSediment samplesApproval of application & sediment samplesContract Signing & Deposit (if required)
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.
SEDIMENT SAMPLING
Analytical TestingMetalsOrganicsHydrocarbonsPesticides
Sample result are usually acceptable for 6 months to one year period
SEDIMENT SAMPLING
Field work
Lab analysis
Final report
Submittal process
Approval
***It takes approximately two week to obtain a final report***
DREDGING METHOD SELECTIONHydraulicMechanicalMechanical/hydraulic offloadingHopper dredging
Traditional diesel powered dredgeDredges available in different sizesMaterial is pipelined to spoil areaCan move larger volumes of materialRequires a larger spoil area
HYDRAULIC DREDGING
MECHANICAL DREDGING
Can be used for relief dredging Several types of mechanical systemsRequires multiple handling of materialMaterial can be transported by bargeSpoil does not contain much water
MECHANICAL HYDRAULIC OFF-LOADING
Hydraulic or electric powered
Deployed by a crane barge
Normally used for short distance pumps
COST & SCHEDULING
COSTS INCREASESFuel CostsSteel CostsDisposal CostsBonds & InsuranceOperating & Labor
FUEL COSTS
STRUCTURAL STEEL COSTS (per ton.)
DISPOSAL COSTS (per cu/yd.)
DISPOSAL COSTS Availability of suitable DMPAs. Increase in operating cost. Land acquisitions.
OTHER COST INCREASESConstruction Costs Government regulationsDistance to disposal areasEmission restrictions
SCHEDULINGPermit amendments 1 to 6 months DMPA application 2 to 5 weeksSediment sampling 2 weeksDMPA contracts 1 to 4 weeksTCEQ Water Quality Certification 1 to 2 weeksPre-dredge survey 1 weekDredge mobilization & pipeline 2 to 4 weeks***Coordinate with dredge availability***
SCHEDULING
Notification to customersCoordination with vessel trafficActual dredge time at dockChannel closures
DREDGE PROJECT MANAGEMENT
Select contractorNotice to marinersPre-construction meetingVessel & dredge schedulingDredge pipeline installation
DREDGE PROJECT MANAGEMENT
DredgingManage & test effluent discharge Coordinate vessel traffic Debris & trashSchedule docksDaily time ticketsInterim surveysPost dredge survey
POST DREDGE CLOSEOUT
Review dredge daily logs, and time ticketsReview contractors & 3rd party post dredge surveyEvaluate the results Mutually agree on a quantitiesSubmit to DMPA OwnerPay disposal fees Pay contractor
PROJECT PLANNING
Periodic hydrographic surveyReview sedimentation ratesEstablish dredge cyclesBe aware USACE projectsCoordinating with neighboring facilities
PROJECT PLANNING Cont.
Keep permits up to date
Have a dredging relief planDMPA applications & contractsEstablish alternate DMPAConsider on-site disposal options
THANK YOU FOR ATTENDING DREDGING YOUR DOCKS 2013