Floating Turbidity Control During Boat Launch Repair
Question: I work for the City Of Fort Saint John in British Columbia (Canada), and we need to purchase silt curtains. I am doing some work to fix up a boat launch on the windward edge of a lake at one of our sites and require turbidity control and silt containment. I am looking at approximately 100 feet in length s 5 foot depth.
Answer: I would be happy to assist you with this. GEI Works carries all three types of Silt Curtain. Choosing the right barrier for your location depends on your water conditions and the amount of sediment you are trying contain.
Choosing Your Silt Curtain
The first thing to decide is which type of silt curtain will work best for your application.
This decision is based on site conditions, water velocity, waves (height, frequency, etc), wind speed and direction, tides, soil type (is it contaminated?), project duration, and site specific requirements and project specifications.
As a general overview, floating silt curtains increase in strength and capabilities as the types increase. The Type 1 silt barrier is used in calm water conditions where there is no flow, while the Type 3 silt barrier works well in the roughest areas, such as locations with a fast current or high waves.
Your boat launch in located at the windward edge of a lake, so initially we would recommend a Type 2 Silt Curtain. It is specifically designed for in-water floating turbidity control around dredging activities, pile driving, rip rap installation, and demolition work. The rugged yet economical floating silt curtain designs make them a contractor's project favorite for moving water at < 1.5 knots and 36” wave swells.
Standard silt curtain sizes are 100 foot and 50 foot long sections. Depths range from 3 feet all the way to 100 feet. Custom design and sizing is available and often required for different turbidity control projects.
Still not sure which floating silt curtain is right for your project? Browse our entire Turbidity Curtain Selection.