Railroad Sluice is starting to fail

About 1/2 mile below the Eastern portal of the BNSF track (after the big curve, under the BPA high voltage lines, and the next major creek going under the tracks) is a culvert carrying water under the tracks. The culvert is positioned above a sluice which carries water away from the steep embankment along the tracks.

It appears the sluice has shifted and is no longer catching all the water. The side of the bank is beginning to erode. See the attached photos.