The higher capacity dry lagoon, measuring approximately
100.0m x 10.0m x 2.0m, then allows managed return of
captured surface water to nearby water courses. Because
of the impermeability of the Bentomat liner, virtually no
retained water is lost through percolation.
Maccaferri Bentomat is a geosynthetic clay liner
specifically designed for landfill and lagoon lining. It
consists of a layer of natural Wyoming Granular Sodium
Bentonite sandwiched between a woven and non-woven
geotextile. It is self-sealing if punctured, has excellent
slope stability and high chemical and climate resistance.
The Bentomat was supplied to on 5.0m wide rolls and
installed by Maccaferri Construction, the Company’s
specialist subsidiary. The liner was overlain with a
300mm layer of sharp sand followed by a 200mm layer
of compacted site won fill. These layers give added
protection to the liner and eliminate any risk of it ‘floating’
due to back pressure of ground-water.
The lagoon walls were constructed using Maccaferri
twisted Gabions which were hand filled with l