The purpose of this study was to determine if there was a significant difference between a six week experimental core stability plank exercise program compared to a traditional supine exercise program in the closure of DRA, and to determine the relationship between DRA measurements, pain, ODI, and PFDI scores.
To meet regulations the average single depth grave is about 3-4 feet deep. Already we see that two out of the three grave depths are deeper than 6 feet (or 1.8 meters). Tripple depth is significantly deeper and double depth is noticeably deeper, being almost 7 feet.
When working around buried facilities, remember that main lines are typically at least 2 feet deep while service lines are only at about 18 inches deep. Existing grades can change and the current depth may be different when it first was installed. Use clearance guidelines when working around these types of facilities.