Sediment Pollution / Dredging & Sediment Remediation
Skip to content
Also, the effects of the shoreline devastation will be litigious (and may still cause damages) for unsuspecting victims of the flooding and sediment transport which would change the course of existing water channels.
Sediment remains the number 1 pollutant of our nation's waterways
Sediment traps, basins, buffers, and barriers will retain sediment on site. Such collection devices need regular maintenance and removal of the accumulated sediment. Sediment capture devices should not be the primary protection against off-site damage. Erosion prevention at the outset remains the best alternative.Bank erosion is the process of the banks of a stream or river wearing away. This differs from the erosion of the watercourse bed, called scour.
Stream bank erosion occurs when the banks of a stream or river are worn away. Human activities such as urbanization and agriculture can significantly accelerate this natural process.
A dam fine idea to check first.
I am a resident of Bend, Oregon and with great interest am watching the questions and solutions to the sediment problems of Mirror Pond.
If the dam is removed, the ensuing sediment flow will bury downstream
habitats of both fish spawning grounds and wetlands habitats.
Also, the effects of the shoreline devastation will be litigious (and may still cause damages) for unsuspecting victims of the flooding and sediment transport which would change the course of existing water channels.
Designing a Dredging Sediment Sampling and Analysis Plan
Mirror Pond should work on a mitigated negative declaration, a report
that would identify problem areas, and ways to lessen the impact of constriction. Much
of the environmental concern will be from trucks spewing diesel
emissions but that will be during construction.
A Mitigated Negative Declaration (MND) is a short document that describes a proposed project, presents findings related to environmental conditions, and includes mitigation measures, if any, included in the project to avoid potentially significant effects. This type of Negative Declaration allows the Lead Agency to revise the project before circulating the environmental document for public review. A negative mitigated declaration states that revisions in the project made or agreed to by the applicant would avoid the potentially significant adverse impacts and that there is no substantial evidence that the revised project will significantly affect the environment.
By following this guidance and TOGS 5.1.9 In-Water and Riparian Management of Sediment and Dredged Material,
as appropriate, applicants proposing to dredge should be able to create an approvable sediment sampling plan. A
flow chart has been provided to allow the applicant to easily follow the sediment sampling plan process.
The applicant is also encouraged to contact NYSDEC Region 2 at any point during the sediment sampling plan
design phase and application process with questions: E-mail: r2dredge@dec.ny.gov or Phone: 718-482-4997.
Staff can address problems and concerns relating to the application, the design of the sediment sampling plan,
and the analysis of sediment samples.
Sediment Profiler Imager is an underwater technique for photographing the interface between the sea bed and the overlying water. The method measures or estimates biological, chemical, and physical processes occurring in the first few centimeters of sediment, pore water, and the important benthic boundary [The benthic boundary layer (BBL) represents a few tens of meters of the water column directly above the sea floor and constitutes an important zone of biological activity in the ocean between ] layers of water. Time-lapse imaging (tSPI) captures the dynamics of what is being observed.
Sediment Profiler Imager is an underwater technique for photographing the interface between the sea bed and the overlying water. The method measures or estimates biological, chemical, and physical processes occurring in the first few centimeters of sediment, pore water, and the important benthic boundary [The benthic boundary layer (BBL) represents a few tens of meters of the water column directly above the sea floor and constitutes an important zone of biological activity in the ocean between ] layers of water. Time-lapse imaging (tSPI) captures the dynamics of what is being observed.
This is common as exacerbated by the contaminated Grass River Sediment, stored at Alcoa West. The EPA's plan requires the removal of approximately 109,000 cubic yards of contaminated sediment from the river. The near-shore areas will be covered with clean backfill after they are dredged on the Alcoa West property.
There may be some potential pitfalls;
Comments