The City standard design specifications, being SUDAS,
Statewide Urban Design and Specifications can be
accessed through the icon link below.
Backfill
Suitable Backfill Material: Class II, Class III, Class IVA, or Class IVB as defined in SUDAS Section 3010, 2.02
Unsuitable Backfill Material: Includes, but is not limited to, the following materials:
- Soils not classified as suitable backfill material, as defined in SUDAS Section 3010,2.02.
- Individual stones or concrete chunks larger than 6 inches and averaging more than one per each cubic foot of soil.
- Frozen materials.
- Stumps, logs, branches, and brush.
- Trash, metal, or construction waste.
- Soils in clumps or clods larger than 6 inches, and without sufficient fine materials to fill voids during placement.
- Environmentally contaminated soils.
Place backfill in lifts no greater than 6 inches thick. Compact granular backfill to 65% relative density and other backfill material to 95% Standard Proctor Density.
Site Design and Content Management