Constructing A Natural Swimming Pond


The client proposed the construction of a leisure pond on his greenfield site. It was conceived as an amenity for the property, but he specified that it should also be a natural pond that would enhance the immediate environment and provide additional ecology and habitat within the area. AGA Group Consultants were appointed to carry out feasibility studies, budget costing and concept design.

Plan of new cemetery

The pond was excavated to a maximum depth of approximately 2m with terraced levels to create shallower shelves around the perimeter; these were to provide sites for flora and fauna to establish. The client opted for a natural hydra soil substrate to establish over a geosynthetic clay liner (A.G.A. Claymat). Once the Claymat was laid and over-lap joints sealed with Bentonite, 300mm of the excavated earth was spread evenly over the liner and compacted as ‘overburden’. When the Claymat is under pressure it becomes self-repairing and should any subsequent damage occur to the liner, it becomes self-sealing.

Trees in new cemetery area

The Work

n edge detail of vegetated coir rolls was placed and secured around the ponds perimeter prior to flooding, this was followed by spot planting of aquatic species, including lilies, selected to establish in the pond. An auto water feed control system was situated within a pond-side manhole. This unit will maintain the ponds mean water level when a natural water loss occurs.

Following our design for the staging, AGA craftsmen built the platform structure on-site with oak plank flooring and oak balustrades. Treated softwood was used for the underwater supports giving sufficient
platform height to allow natural water movement thus keeping a viable habitat beneath.

An Eco-Island, that will form a natural habitat, was anchored around an Oase aerator system, thus the pond is able to support a sporting population of rainbow trout. An Ultrasonic algae control unit will maintain the biological integrity of the pond keeping it in peak condition for the leisure and amenity activities required by the client.

AGA Claymat high technology lining system was selected by David Garner so as to achieve a truly natural pond environment that will be permanently protected. AGA GCL liners provide securely sealed water containment systems with self-sealing properties that come into play in the event of subsequent damage.

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