Here are 3 grading tips and tricks i would like to present to you.
1. The fastest way to pull contours from a surface is used the extract objects from surface options. You can find this option under the surface pull down then utilities.
2. The best way to remove brealklines or points from a surface is to go into your surface properties, then select definition tab. From here you can remove objects. It will ask you if you want to rebuild your surface. Select yes. This is where naming your breaklines can come in handy. I try my best to name all my breaklines so it will make it easier on me to remove if have to.
3. You can create featurelines from corridor in two ways. First you can use created featureline from corridor option which is in your home tab, featureline pull down. The second way is to go you corridor pull down, select properties, then create grading featureline from corridor. You also set your featureline to be dynamically linked to your corridor.
4. Always check your surface data under the surface propertied statistic tab. Here you can see if you have a bust in your elevations by checking your min. and max slopes and elevation.