![]() ![]() This study examines whether suction dredging for cockles on tidal flats of the Dutch Wadden Sea had affected densities ofħ7 FR 25717 - Proposed Issuance of a General NPDES Permit for Small Suction Dredging ![]() Suction dredging for cockles removes large cockles from tidal flats and may also cause mortality of non-target fauna and make the habitat less suitable for some species. significant economic impact on a substantial number of small entities.'' EPA has concluded that NPDES general.Įffects of suction-dredging for cockles on non-target fauna in the Wadden Sea Small Suction Dredges in Idaho AGENCY: Environmental Protection Agency, Region 10. System (NPDES) General Permit (IDG-37-0000) to placer mining operations in Idaho for small suction. The natural.ħ8 FR 20316 - Final Issuance of General NPDES Permits (GP) for Small Suction Dredges in Idaho 150m and ambient levels were reached within. Concentrations > 100 mg/l were restricted to a downstream distance of. ![]() The concentration of suspended material in the immediate vicinity of an operating sand suction dredge in the Oresund was 3-5000mg/l. Dispersion of suspended material from an operating sand suction dredge in the Øresund (Denmark) ![]()
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