Maccaferri’s MacLine GCL Geosynthetic functions as a highly efficient clay lining for landfill and lagoon lining as exemplified by the Lincolnshire Lagoon lining project in 2013.
MacLine GCL is a Geosynthetic clay liner specifically designed for landfill and pond lining. It consists of a layer of natural Granular Sodium Bentonite sandwiched between a woven and non-woven geotextile.
It is self-sealing if punctured, has excellent stability and climatic resistance, together with a high chemical resistance. MacLine GCL is supplied in 5.0m wide rolls and is straightforward to install using readily available plant.
A MacLine GCL and Gabion combination solution were installed successfully in a Lagoon Lining Project that was constructed in Lincolnshire.
Lincolnshire’s new state of the art Energy from Water recycling plant at North Hykeham, Lincoln is built on a low-lying brown-field site with a high local water table. This high ground-water level and limited availability of space ruled out the use of a conventional SUDS-style system of large ground-level attenuation ponds.
These would typically be used to allow for the return of surface water to run-off from the buildings and surrounding hard-standing to the sub-soil mainly through:
- natural percolation
- managed discharge to watercourses. The construction of above-ground ponds to promote gravity assisted percolation was also rejected on cost grounds.
Arup Consulting Engineers devised a two-stage system of wet and dry ground level holding lagoons.
These were impermeably lined with Maccaferri’s MacLine GCL—a reinforced geosynthetic clay liner—and surrounded by 2.0m high, stone filled, Gabion retaining walls.
The connected lagoons take advantage of slight falls in levels.
The higher and smaller wet pool accept the initial storm surge before gravity discharge through pipework to the much larger and lower dry pond. The high capacity dry lagoon then allows for the controlled return of captured surface water to nearby water courses.
For further technical details, please download our Case Study.
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