List of Contributions

I was the Utility Coordinator for City of Fort Worth construction projects for several years. First and foremost I expected Utility Companies to be able to identify the location of their facilities prior to beginning of design, hopefully to avoid the need to relocate in the first place. Once preliminary ...

Eric Sosnowski's suggestion regarding a flowable fill in the pipe area is a good one. If you have access to an inexpensive supply of fly ash, the flowability can be improved without adding excessive water to the 1-sack mix. You must be careful not to "float the pipe" while it is being applied. The backfill ...

You are correct that lift stations are to be avoided whenever possible. You can expect extensive utility trench settlement with the first solution. It is very difficult to achieve adequate compaction in such deep trenches. The depths you are contemplating could well compromise the pavement structure. ...

The use of Controlled Low Strength material would be ideal for backfilling of narrow utility trenches under pavement. When used with high volumes of air, they are self compacting and self leveling. Unfortunately they tend to be very expensive and then there is the haul-off of the excavated material. ...

I have used the Tensar geogrid (Triax 140/160) extensively underneath 8 inches of flexbase over utility trenches which have not been properly compacted. It is generally impractical to recompact very deep utility trenches underneath pavement in new sub-divisions. In another case where a pavement had been ...