Slide 2 DREDGING YOUR DOCKS 2013 Supported by: USACE Galveston
District U. S. Coast Guard Sabine Neches Navigation District Slide
3 DREDGING YOUR DOCKS 2013 Organized By: CRA Hydrographic Surveyors
Orion Marine Group Slide 4 DREDGING YOUR DOCKS 2013 Dredging
Private Terminal Slide 5 Permits Hydrographic & Pre-Dredge
Survey Dredge Material Placement Areas Sediment Sampling Dredging
Method Selection Cost & Scheduling Dredge Project Management
Post Dredge Closeout Slide 6 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 Slide 7 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. Slide 8
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. Slide 9 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. Slide 10 PERMITS Navigation Districts & Private
DMPA Usually requires site specific criteria: Surveys Sediment
sampling Payments Contract terms. Should be documented on the USACE
Slide 11 HYDROGRAPHIC & PRE-DREDGE SURVEY Hydrographic Surveys
Slide 12 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 Slide 13 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
Slide 14 Pre-Dredge Survey Slide 15 Slide 16 DREDGE MATERIAL
PLACEMENT AREA DMPA selection Location Permit Cost Availability
Slide 17 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) Slide 18 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. Slide 19 SEDIMENT
SAMPLING Analytical Testing Metals Organics Hydrocarbons Pesticides
Sample result are usually acceptable for 6 months to one year
period Slide 20 SEDIMENT SAMPLING Field work Lab analysis Final
report Submittal process Approval ***It takes approximately two
week to obtain a final report*** Slide 21 DREDGING METHOD SELECTION
Hydraulic Mechanical Mechanical/hydraulic offloading Hopper
dredging Slide 22 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
HYDRAULIC DREDGING Slide 23 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 Slide 24 MECHANICAL HYDRAULIC
OFF-LOADING Hydraulic or electric powered Deployed by a crane barge
Normally used for short distance pumps Slide 25 COST &
SCHEDULING Slide 26 COSTS INCREASES Fuel Costs Steel Costs Disposal
Costs Bonds & Insurance Operating & Labor Slide 27 FUEL
COSTS Slide 28 STRUCTURAL STEEL COSTS (per ton.) Slide 29 DISPOSAL
COSTS (per cu/yd.) Slide 30 DISPOSAL COSTS Availability of suitable
DMPAs. Increase in operating cost. Land acquisitions. Slide 31
OTHER COST INCREASES Construction Costs Government regulations
Distance to disposal areas Emission restrictions Slide 32
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*** Slide 33 SCHEDULING Notification to
customers Coordination with vessel traffic Actual dredge time at
dock Channel closures Slide 34 DREDGE PROJECT MANAGEMENT Select
contractor Notice to mariners Pre-construction meeting Vessel &
dredge scheduling Dredge pipeline installation Slide 35 DREDGE
PROJECT MANAGEMENT Dredging Manage & test effluent discharge
Coordinate vessel traffic Debris & trash Schedule docks Daily
time tickets Interim surveys Post dredge survey Slide 36 POST
DREDGE CLOSEOUT Review dredge daily logs, and time tickets Review
contractors & 3 rd party post dredge survey Evaluate the
results Mutually agree on a quantities Submit to DMPA Owner Pay
disposal fees Pay contractor Slide 37 PROJECT PLANNING Periodic
hydrographic survey Review sedimentation rates Establish dredge
cycles Be aware USACE projects Coordinating with neighboring
facilities Slide 38 PROJECT PLANNING Cont. Keep permits up to date
Have a dredging relief plan DMPA applications & contracts
Establish alternate DMPA Consider on-site disposal options Slide 39
THANK YOU FOR ATTENDING DREDGING YOUR DOCKS 2013
