22 CAR § 111-1102. Standards for grading around structures

CONDITIONS MAXIMUM MINIMUM PREFERRED Side slopes with vehicular access 10% 10:1 2.0% 50:1 1 – 3% Back slopes with vehicle access 15% 6.6:1 2.0% 50:1 1 – 5% Side slopes without vehicular access 15% 6.6:1 2.0% 50:1 1 – 10% Back slopes without vehicular access 20% 5:1 2.0% 50:1 1 – 10% Grassed athletic fields 2% 50:1 0.5% 200:1 1% Berms and mounds 20% 5:1 5.0% 20:1 10% Mowed slopes 25% 4:1 ---- ---- < 20% Unmowed grass banks Soils natural angle of repose < 25% Planted slopes and beds 10% 10:1 0.5% 200:1 3 – 5%