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− | + | Correctly sized riprap used for apron energy dissipation. Rock is correctly placed according to pipe size and outlet velocity and is placed within 24 hours after pipe outlet connects to a surface water. |
Correctly sized riprap used for apron energy dissipation. Rock is correctly placed according to pipe size and outlet velocity and is placed within 24 hours after pipe outlet connects to a surface water.
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current | 16:14, 3 November 2016 | 640 × 480 (200 KB) | Mtrojan (talk | contribs) |
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