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Correctly sized riprap used for apron energy dissipation. Rock is correctly placed according to corrugated metal pipe size and outlet velocity.

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current19:45, 18 October 2016Thumbnail for version as of 19:45, 18 October 2016893 × 670 (344 KB)PLeegar (talk | contribs)
16:34, 18 October 2016Thumbnail for version as of 16:34, 18 October 2016893 × 670 (344 KB)PLeegar (talk | contribs)