in-water disposal site / dump site / disposal site / large metal posts / satellite information / bank / chemicals / dredged material disposal site / energy / mechanical device / /
NaturalFeature
Monongahela River / Mississippi River / /
Person
Rob Marshall Cutterhead / Rob Marshall / Carol Arney Webdate / Rob Marshall Hopper / Rob Marshall Hopper Dredges Hopper / Rob Marshall Airlift / /
Position
Photographer / /
Product
sediments / /
ProvinceOrState
Illinois River Rock Island District / Mississippi / /
Dredging Keeping Our Underwater Highways Open Sedimentation Material that falls to the bottom of a liquid is called sediment. If enough sediment deposits to build a shallow spot on the river or ocean bottom, it forms sho