Any suggestions on how to get this done. FFE for garage is 665.50 to make the be slightly above the existing parking lot of around 694.38. I need to cut down on the west side and drain to the existing inlet on the northwest corner of the garage at 693. I just need to keep the existing sidewalk intact while grading down from around elevation 700 to create a swale towards the flowline (circled in blue)? How would I do that in Civil 3d? I'm struggling with feature lines to get the contours to look correct in the Existing ground surface.

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