Grade Liner

A grade liner for use in cooperating with grade stakes in determining grade with a ditch comprising:

• means for establishing the horizontal sight line a selected rise distance "A" above a grade stake;
• plumb means coupled to said means for establishing a horizontal sight line and intersecting said horizontal sight line comprising a linear scale the intersection of which with said horizontal sight line is viewable along said sight line the zero calibration of which scale is located a selected distance related to said rise distance "A" from the lower end of said plumb means;
• offset means coupled to and above said means for establishing a horizontal sight line for supporting said plumb means a selected offset distance from said grade stake;
• and
• means coupled to said offset means for locating the horizontal sight line established by said means therefore below said offset means so that the intersection of said linear scale with said horizontal line of sight will be uneffected by any sag in said offset means when the scale of reading of said linear scale is taken with respect to the lower end of said plumb means.