Miwa Dam

Client Khowa Engineering Company Ltd / MLIT (final client)
Location Nagano District, Japan
Scope Of Work Due to two major weakness zones, the sediment load into Miwa is one of the highest in Japan, causing rapid loss off storage volume. MLIT requested a demonstration of technology capable of removing reservoir sediments from the many reservoirs in Japan having sediment problems.
Schedule 2010

Project Detail


Miwa dam is the main test facility for sediment handling in Japan. The past years various sediment discharging methods have been tested, among them SediCon Sluicer (2008) and SediCon Dredge (2010).

Implementation: SediCon AS and its partner in Japan, Khowa Engineering Co Ltd, have developed and manufactured a SediCon Dredge with a jetting system capable of disintegrating and dredging sediments up to 280 mm.

Results: The demonstration proved successful removal of reservoir sediments ranging from silt to piece of wood and stones up to 280 mm. The calculated capacity of the dredge was verified as well as ability to produce a continuous high production.

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