IMG_8427

These retaining walls have weep-holes with filter material that enable water to seep out of the walls, and release pressure on it. This water percolates into a narrow drain on either side of the underpass, and flows into the lowest point.

These retaining walls have weep-holes with filter material that enable water to seep out of the walls, and release pressure on it. This water percolates into a narrow drain on either side of the underpass, and flows into the lowest point.

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