NORTHERN STATES POWER
SUPERFUND SITE

J.F. Brennan Company, Inc & Envirocon, Inc

PRODUCTS USED TO PROTECT OUR ENVIRONMENT

spill response
dewatering bags
dewatering bags for silt
turbidity curtain

The Problem

When J.F. Brennan and Envirocon needed to design a custom turbidity curtain layout for the Ashland/Northern States Power Superfund project in Ashland Wisconsin, IWT Cargo-Guard and Spilldam Environmental were called upon to come up with a curtain system that would work and satisfy both the oversight engineers and regulatory authorities. The dredge material, NAPL (non-aqueous phase liquids), can be particularly difficult to work with as it coats and clogs almost everything it comes in contact with.

The Solution

By working closely with the engineering company and the onsite contractors, J.F. Brennan and Envirocon, a multi-tiered approach was designed to provide a fail safe containment system. The system consisted of bedload baffles, carbon curtain, and  turbidity barriers / silt curtains designed specifically for this project site.

In addition, IWT Cargo-Guard supplied the contractor oil containment and absorbent booms along with sweeps, and oil snares to grab the material within the work zone.

The most successful curtain designs involve a compilation of information provided by the engineers, site contractors, local marine contractors as well as turbidity barrier manufacturers and their representatives.

“IWT Cargo-Guard / Spilldam Environmental assisted the Ashland MGP project by designing and constructing a one of a kind turbidity curtain system which allowed JF Brennan to carry out the marine operations. Without the innovative solutions created for the project, a massive sheet pile wall would have been required to conduct the remedial activities. With the curtains, Brennan was able to carry out the project without the installation of the wall which saved the client a substantial amount of money.”

 -Tyler Lee , Senior Project Manager J.F. Brennan Company, Inc.

In order for a turbidity barrier / silt curtain to work properly, it must be site specific in design. It is also important to select the appropriate anchor systems and accessories. Many environmental dredging projects north of the Mason-Dixon line take place in late Spring through Fall. This can add significant time frames to both site supply and production.

We have carefully selected the best manufacturers to supply our clients. If one is booked, we have three others to move in and service your needs. We are confident in our multi-tiered approach to supply your project in a timely fashion with a quality product. Contact our office at 609-971-8810 so we can discuss your next project.

The material to be dredged NAPL (non-aqueous phase liquids) can be particularly difficult to work with as it coats and clogs almost everything it comes in contact with. By working closely with the engineering company and the onsite contractors,J F Brennan and Envirocon, a multi-tiered approach was designed to provide a fail safe containment system. The system consisted of bedload baffles, carbon curtain, and  turbidity barriers / silt curtains designed specifically for this project site.

After excavation and ISS, a site cover, consisting of clean imported backfill and US-2NN, a double-sided natural net straw erosion control blanket was installed across the site and adjacent properties. Clean fill was also placed in the channel to restore back to previous channel elevations. Along the shoreline, Koirmat 700 and straw wattles provided the erosion control necessary to help in the establishment of the native species of aquatic and riparian plants.
spill response
dewatering bags
dewatering bags for silt
turbidity curtain

The Problem

When JF Brennan and Envirocon needed to design a custom turbidity curtain layout for the Ashland/Northern States Power Superfund project in Ashland Wisconsin, IWT Cargo-Guard and Spilldam Environmental were called upon to come up with a curtain system that would work and satisfy the oversight engineers and the regulatory authorities.

The Solution

The material to be dredged NAPL (non-aqueous phase liquids) can be particularly difficult to work with as it coats and clogs almost everything it comes in contact with. By working closely with the engineering company and the onsite contractors,J F Brennan and Envirocon, a multi-tiered approach was designed to provide a fail safe containment system. The system consisted of bedload baffles, carbon curtain, and  turbidity barriers / silt curtains designed specifically for this project site.

After excavation and ISS, a site cover, consisting of clean imported backfill and US-2NN, a double-sided natural net straw erosion control blanket was installed across the site and adjacent properties. Clean fill was also placed in the channel to restore back to previous channel elevations. Along the shoreline, Koirmat 700 and straw wattles provided the erosion control necessary to help in the establishment of the native species of aquatic and riparian plants.

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