The Hydrapave™ system allows water to infiltrate through 4mm deep vertical channels at each end of the 80mm thick concrete Hydrapave™ pavers and into a prepared 50mm bedding course, where pollutants are filter treated naturally. The water is then dispersed into the sub base through a series of graded gravel layers, penetrating to the trees’ root systems through the pavement and via the specially prepared ‘structural soils’ beneath, to a final layer comprising a 50/50 mix of topsoil and 50mm diameter multi-faceted basaltic rock – used as a growing medium for new trees. Any excess water is drained away through an agricultural drain into the stormwater system by means of an agricultural drainage system.
Used at the Yerrabi 2 Estate at Yerrabi Ponds, Gungahlin ACT, this unique paving system demonstrates its remarkable ability to control stormwater runoff and pollution. According to landscape architect, Alan Peggie from Red Box Design Group, using Boral Hydrapave on the driveways connecting the residences in this large residential development provided the unifying element that linked the many different aspects of the project. Specifying 3000m² of Boral Hydrapave permeable pavement system in Natural and Charcoal provided Alan Peggie with simple paving (“nothing too outrageous”) in a “continuous ribbon effect”.
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