good points rconner.
these are corrugated metal pipes - 40-50 years in age - best guess.
we video inspected the pipes. there is rust observed in the bottoms. no evidence of being fully eroded YET..but other pipes along roadway has show this type of wear.
main reason to replace these steep...
thanks for the responses everyone. we have the money to "fill" them with something.
given the steepness and confined/difficult/steep working terrain - that's an issue.
also, the steepness of the pipes - many, many years ago when this was a forest service road...they just threw the pipes in...
hello everyone. i'm new to this forum.
wanted to see if anyone had a tip on my question:
i have 3 culverts that are being replaced under a highway. diameters are 18", 24" and 36". The location is a mountainous, river canyon - roadway is approximately 100' above the river - 2:1 slope down to...