| What
you observe... |
What
may be the reason... |
How
to fix it... |
| Scouring/erosion
at the inlet. |
•Ditch
too steeply graded.
•Poor
location/alignment.
•Cogged
pipe.
|
•Line
the inlet with stone.
•Properly
align the culvert.
•CIean/flush
the culvert.
|
| Scouring/erosion
at the outlet |
•Pipe
sloped too much.
•Pipe
is too small.
|
•Build
a stone splash pad.
•Check
size and replace with large pipe if necessary.
|
| Ponded/puddled
water |
•Invert
is too high.
•Ditch
grade is too flat.
|
•Reset
the pipe to match the invert to the channel bottom.
•Regrade
ditch to maintain correct flow.
|
| Dented/crushed
ends. |
•Traffic/snow
plows are hitting the ends.
|
•Fix
pipe ends. Mark and protect.
|
| Heavy
corrosion. |
•Water
flowing through the culvert is acidic. |
•Install
a sleeve of PVC in the existing pipe or replace the steel pipe
with a non-corrosive material (PVC, aluminum, concrete). |
| Piping
around the outlet. |
•Pipe
is incorrectly installed, resulting in water flowing outside the
pipe.
|
•Reinstall
pipe with proper bedding and compaction.
•Install
a headwall.
|