How Do I String a Plumb Line for Leveling a Yard?

Drive a pair of wooden posts into the ground, the first one at the front end of the yard and the other at the furthest end of the yard. Multiple pairs of posts can be used if the yard is large.

Nail a string line on the first post at the level the yard is supposed to be.

Stretch the line across to the other post and tie it securely but ensure that it can still be moved up or down on the post. It is important that the line be taut, with no sag.

Place the bubble level in the approximate middle of the string between the two stakes to see how far off level the line is.

Raise or lower the string attached to the second post, as necessary, to level the line. If the bubble is toward the first post, the line needs to be lowered on the second post. If the bubble is toward the second post, the line needs to be raised. When the bubble is directly between the two markers, then you know the line is level, and any soil filled equal to the string will also be level.

Secure the line to the second post so that it will not move.

String a line in the same way between the lines from multiple pairs of posts to create a crossing grid pattern across the yard. Checking the crossing line will ensure the yard is also level from left to right.