PROJECT:
GRASSE RIVER

LOCATION:
Up State New York

PROBLEM:
Agency concerns over whether a turbidity curtain system could be relied on to contain suspended contaminated sediments during a dredging operation.

SOLUTION:
Elastec/American Marine was called to design, deploy and maintain two curtains of 700 ft. and 1,100 ft. while maintaining water standards outside the dredge line. The project lasted over 3 months. AMI personnel were on site to ensure curtain integrity.

World Dredging - read the published article

PROJECT:
WALTER F. GEORGE LOCK AND DAM

LOCATION:
Walter F. George Reservoir in Southwest Georgia

PROBLEM:
To contain turbidity within the footprint of a template barge that was discharging silt into 100' of water. The barge was moved frequently so the curtain had to adjust from 100' deep to 30' deep.

SOLUTION:
Elastec/American Marine designed and manufactured a first time ever 100' deep curtain system that floated around and was attached to the barge. It was equipped with a reefing system to adjust skirt depth as needed. The curtain worked perfectly maintaining turbidity levels outside the curtain at below required levels throughout the duration of the project.

PROJECT:
BLUE RIDGE PROJECT

LOCATION:
Taccoa Reservoir Georgia

PROBLEM:
Control turbidity during the construction of a concrete intake structure in 70' of water. The work was to be performed from a modular barge out in the reservoir. Because the depth of the water over the duration of the project was variable; the curtain skirt needed to be adjustable.

SOLUTION:
Elastec/American Marine designed a system that where possible would be attached to the barge elimating the need for curtain flotation. Specially made steel fittings were fabricated to attach the curtain to the barges. Special devices were included to keep the curtain from fouling on the equipment being used to do the work. The curtain was also equipped with reefing system to allow for adjustments in curtain depth over the duration of the project. The system worked perfectly maintaining turbidity levels below that required. The customer has since purchased more curtain for the expanded second phase of the operation.

PROJECT:
SAINT LAWRENCE SEAWAY

LOCATION:
Up State New York

PROBLEM:
Contaminated sediments needed to be removed along a large area on the north bank of the river. A sediment containment system had to be designed to ensure the contamination was contained in the dredge area. The river was fast moving with ship traffic and debris creating a challenge for engineers.

SOLUTION:
Working with consulting engineers Elastec/American Marine designed a system to ensure the contaminants remain contained while the work was in progress. The system included a modified turbidity curtain installed in cells protected by an outer cofferdam perimeter. This large scale remediation effort took several months to complete. Our company representative was on hand to ensure the system was installed properly. The project was a great success with a front page article appearing in the International Dredging Review, issue volume 21, number 3, dated April/May 2002.

Read the Published Article

PROJECT:
KENSICO RESERVOIR

LOCATION:
White Plain New York

PROBLEM:
Seasonal high turbidity levels were occurring in the areas where water was flowing into the reservoir. This increased turbidity in the water, and finding its way into the several water intakes that service the drinking water needs to New York City and surrounding area.

SOLUTION:
In the early 1990's a plan was developed which included the use of our custom made turbidity curtains which would be installed in the reservoir and deflect the turbid water away from the intakes and allow the silt to settle out. The curtains are are made such that they contour the bottom, and in some locations extend out 1,000' from shore. All in all over 7,000' of deflection barrier is in place so far. the curtains are performing as expected and have solved the turbidity problem where they are installed. The work is expected to continue through 2004.

PROJECT:
NORTHEASTERN ATOMIC POWER PLANT

LOCATION:
Maine

PROBLEM:
A sensitive dredging project in the waterway would require a staged approach and last two years. Close monitoring of escaping contaminants required that the job be done in contained cells. The curtain system had to contain sediments in a large area and be able to be segmented into smaller cells during the dredging operation. The curtain had to be in place during winter months and hold up to snow and icy conditions.

SOLUTION:
Elastec/American Marine designed a unique curtain system using a large outer curtain with attachment points every five feet. Specially designed curtain panels could be attached at these points creating a flexible cell system. This approach allowed the dredging operation to selectively remove sediments in the desired areas while not allowing cross contamination.

PROJECT:
RIVER RAISIN

LOCATION:
Monroe, Michigan

PROBLEM:
To deflect the flow of the river while isolating an area where hazardous materials were being removed from the river bottom.

SOLUTION:
Elastec/American Marine designed and manufactured a 1,800 ft. and a 1,500 ft. curtain that performed as predicted, ensuring the EPA water standards were maintained outside the effected area. Commercial barge traffic continued during dredging.

PROJECT:
TOLT RESERVOIR

LOCATION:
Washington State

PROBLEM:
Seal and protect an area of 60 ft. around an intake tower. Construction work on the tower was to last 6 months. The curtain had to operate with as much as 40 ft. fluctuations in the reservoir's water level.

SOLUTION:
Elastec/American Marine took on this challenging project and manufactured a unique curtain protecting the reservoir while construction on the tower took place.

Elastec/American Marine: 1309 West Main, Carmi, IL 62821 USA
Call us at (618) 382-2525 Fax (618) 382-3610 E-mail elastec@elastec.com
Updated May 2004. © Elastec/AmericanMarine. All rights reserved.