How much backfill is most commonly recommended by utilities?

The most commonly recommended amount of backfill by utilities is typically 2 feet. This recommendation stems from the need to provide adequate soil cover over underground utilities, which helps protect them from physical damage and ensures they are not affected by surface activities. The 2-foot depth balances the need for sufficient support while minimizing soil settling and the potential for utility exposure or damage from surface loads.

When utilities are installed, they need to be buried deep enough to avoid frost heave, vehicular traffic, and other environmental factors but not so deep that groundwater issues arise or heavy equipment cannot easily reach them for maintenance. A 2-foot backfill is considered sufficient to create a stable and safe environment around these utilities.

In practice, different utilities may have specific guidelines, but 2 feet has emerged as a standard depth in many regions, leading to its common recommendation. Other depths may be employed based on specific circumstances but might not provide the same balance of accessibility and protection.