~ At this site, the lack of a flood plain for stream relief during storm events exacerbates overtopping on this bridge.
~ For sites similar to this, a permanent solution would require a multispan curved girder bridge.
~~ Cost for such a large bridge cannot be justified for the current 210 ADT, which is projected to be 500 in 25 years.
~~ Also, in the mountains, approvals for long detours are difficult to obtain.
~ FEMA studies do not provide conveyance credit for openings in the rail. As such, there is not much hydraulic design benefit in using the Nebraska barrier rail.
~ For similar sites, additional measures to mitigate debris accumulation should be considered.
~~ Shallower bent caps with closer pile spacing, and
~~ End treatments for guardrail attachment to bridge rail.
