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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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current16:14, 3 November 2016Thumbnail for version as of 16:14, 3 November 20161,600 × 1,200 (2.28 MB)Mtrojan (talk | contribs)


This page was last edited on 19 December 2022, at 16:43.