|
CASE
STUDY
–
FMC
(Pocatello, Idaho)

Phosphorus Tailings Lagoons Require
Closure Super Strong Fabric Floated into Place and Backfilled by Conveyor
Belt
BY: William A. Smallwood II, VP-Engineering (Flint
Industries, Incorporated)
FMC needed to remove the water from phosphorus tailings
lagoons due to incidents of wildlife death. Earlier attempts at
floating millions of bright plastic balls had failed to warn all
the birds that attempted to land. Due to the explosive nature of
phosphorus when it comes in contact with the air, this problem
was no easy task to solve.
An extremely strong polypropylene fabric of over 113 newton-meters
in both directions and known as GC 1000 was selected. They
contracted Flint Industries, Inc. to develop a panel plan for
each pond and to panelize at their facility in Georgia, panels
that could later be assembled on-site by applying the final
seams.

Flint Industries was then selected to
assemble the panels on-site using a heavy duty double needle
sewing machine. Once sewn, the panels were then moved into place
by the general contractor and winched across while maintaining
tension on the sides. The entire process took a little over two
weeks to cover 83613 square meters of lagoons.
|