Arc Surveying & Mapping, Inc

Arc Surveying & Mapping, IncEnvironmental Dredging SurveysEast Chicago, Illinoiswww.arcsurveyors.com

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Indiana Harbor

Jobsite East Chicago Indiana

Indiana Harbor Sediment Removal

Harbor History

Dredging will be undertaken throughout the Indiana Harbor and Canal to establish the navigation depths and widths authorized by H. Doc. 1113, 60th Cong., 2d Sess., taken from the River and Harbor Acts of 1910. Dredging will also be completed in the adjacent berthing areas outside of the authorized channel limits at non-Federal expense to provide depths commensurate with those in the Federal channel.

The Indiana Harbor and Canal have not been dredged since 1972 due to a lack of suitable storage area for the contaminated sediments. The accumulated sediment backlog in the IHC will be dredged over an 8 to 10 year period and will produce an estimated 1.6 million cubic yards of dredged materials. These sediments currently cause pollution of Lake Michigan and affect the efficiency of deep draft commercial navigation. After backlog dredging is complete, maintenance dredging will take place, as necessary, over a period of approximately 20 years, to remove accumulated sediments and maintain navigable depths in the harbor and canal.

Dredging will be performed using a closed bucket mechanical dredge. The dredged material will be loaded onto barges or scows that will be then moved to the disposal area. Next, dredged material will be mixed with water (slurried) that is obtained from the CDF, to make a mud-mixture. This slurry is then pumped into the CDF and allowed to settle. As the sediment settles to the bottom, clean water remains at the surface, which can then be recycled for additional sediment placement.

Excavating Contaminated Sediments

Transfer Sediment to Disposal

Services Provided By ArcEstablish Horizontal & Vertical ControlGeo-reference survey data to appropriate State Plane Coordinate System and National Vertical DatumPerform Multibeam Swath Hydrographic SurveyCollect depths of 100 % of the seafloorPerform Side Scan Sonar Locate objects lying on or protruding above the seafloor Perform Sub-Bottom Sonar Survey Locate sub-bottom and some buried objects Perform Magnetometer SurveyLocate ferrous metalsPerform Optical Laser scan Shore Side Survey Survey shoreline from survey vesselCompute Remediation Excavation QuantitiesProvide Plans, Cross-sections and excavation quantities

Launch & Equipment Installation

Establish Horizontal & Vertical Control

Topographic Laser Scan Data

Topography Laser Scanned From Survey VesselRiegl BV5000 Terrestrial Laser scanner

Interactive Topographic & Hydrographic Survey Model

Combined Bathymetry & Topography

Multibeam Swath Bathymetry collected utilizing Reson 7125 SeaBat

100% Underwater Coverage

512 beams 165 degree swath - 400/200 kHz Seamless data Collection

Sheeting & Seafloor Interface

Arc Survey Cover Drawing

Bathymetry & Topography Collected Simultaneously

Laser Scan DataHydrographic Data

Magnetometer Survey

Locate & Map Ferrous Metals

Side Scan & Sub-Bottom Survey

Locate Objects on the seafloorLocate Centerline Profile And Sub-BottomTargets 1, 2 and 3

Side Scan Seafloor Targets

Cross Sections Required & Overdepth Excavation

Indiana Harbor Sediment Remediationwww.arcsuveryors.com