United States · North America · US STH
St Helens
River (Natural) · Very Small harbour · North Pacific Ocean
Port information
- Channel depth
- 6.4 m
- Anchorage depth
- —
- Berth depth
- 7.9 m
- Tide range
- 0.6 m
- Max vessel draught
- —
- Water
- fresh
- Likely soil (estimate)
- Sand, Silt / mud, Gravel
- Position
- 45.867, -122.800
Dredgers that can do the job here
- TSHDTrailing suction hopper · Small–medium (1,000–5,000 m³)
Loose sand or silt in open water. Can work while ships keep moving and carry spoil long distances.
- WIDWater injection · Water injection
Cheap upkeep for fine silt in channels with a current.
- CSDCutter suction · Medium (400–550 mm)
Deepening work where spoil is pumped through a pipeline to land.