How to Set Catch Basin Grades Before Asphalt Paving

Catch basin grades are easy to underestimate because the structure is already in the ground and everyone is watching the paving schedule. The problem shows up after the asphalt is down: water sits around the rim, the grate is proud, or the basin is too low and every truck tire finds it. By then the fix is sawcutting fresh pavement or living with a drainage complaint. Before paving, I like to…