Please review the text and drawing and let me know if the proposed installation is acceptable.
Here is additional information with a section view.
We have concerns that changing the offset of the posts relative to the headwall from the tested system may increase vehicle extent over the culvert and potential wheel snag on the culvert. In the detail shown, the culvert wingwalls appear to be perpendicular to the headwall, which would further increase the snag concerns.
Thus, we would not recommend the offset shown.
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