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Underwater dredging construction precautions

1. With navigation requirements, should meet the relevant navigation requirements. Water pipelines across the river, need to lay the drowning pipe, and marked with a clear logo, to ensure navigation safety.

2. Measures shall be taken to ensure the safety of the building in the vicinity of existing buildings (such as bridges, gates, etc.).
3. When an underwater obstruction is found, the supervisory authority should be immediately reported and marked with buoys and light signs to ensure safety and to remove the underwater obstruction as soon as possible.
4. In the construction process should take measures to strictly control the siltation.
5. When the river dredges, the project department should strictly control the groove width and depth. The horizontal width and vertical depth of the overtaking should meet the relevant requirements.
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