HI! How do you guys approach drawing the grade line - the NCARB practice exam shows a swale and ridge, but the contours do not cross the cut line. Dorf advises NOT to interpolate the grade and instead to draw it straight across. On several posts here, i've seen examples where some amount of interpolating was graded as a pass. Advice? Experience? What's the rule on this???
EDIT - I rewatched the Dorf video, and realized that his cut line goes through the 120 contour and the 125 contour, but the NCARB example does not. So, it's not apples to apples. Oh well. I still find his advice on the video to be confusing.