Minimizing the transport of excavated sand lowers construction costs.
Tidmarsh, February 2016: the earthen berm in which these concrete spillways were embedded had to be dug out and hauled away before the concrete could be demolished. The sand from the berm was used to fill a portion of the old stream channel in an adjacent bog cell to the north.
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In addition to re-using sand near where it is excavated, projects should incorporate locations for sand islands on project areas that have higher elevations, allowing more sand to be removed from the lowland areas.