Stream/River/Canal Question

[sweeteye]

I need some help to solve a problem I have created with a canal.Unfortunately I drew the contours before the canal and I now have two areas where the canal cuts through higher contour levels. I tried splitting the higher contour level but it did not work out right because the contour line is very lengthy and the split connects to a distant area of the map makes a mess to say the least.(Hope that makes sense.)...At the moment I have put in embankments along the areas cutting through the higher contour levels.I thought perhaps I should use a negative -50 meter value for the embankment....this does not seem right though.The canal is on a 150 meter contour level and cuts through a 200 meter contour level.Anyone have a suggestion as to what I might do?

[sweeteye]

Guess I will just leave it as is. The negative value of the embankment in effect creates a cutting, apparently.