The Job
This New York pipe abandonment project is located in Newburgh, New York. Newburgh is on the Hudson River, about an hour upstream of New York City.
The Challenge
As part of a sanitary sewer upgrade project, 5,399 linear feet of gravity sewer ranging from 6″ to 24″ was specified for grout filling. The highest volume run was a 1,022 linear feet continuous run of 24″ pipe. The longest run was 1,469 linear feet of 18 inch” pipe. Each run did have intermediate manholes, but most manholes were a few hundred feet apart.
The Solution
Traditionally, the customer would have dumped flowable fill in the manholes in an attempt to completely fill the lines by gravity. However, many of the manholes were off road, and some of them were hundreds of feet apart. This makes gravity discharge of flowable fill into manholes unreliable for ensuring complete fill.
CJGeo proposed performing the abandonment grouting using 30lb/cuft CJFill-Ultra Lightweight cellular grout. Since cellular grout will flow much further at nominal pressures, CJGeo was able to place through multiple manholes at once, which significantly reduced access requirements.
Due to the relatively low volume on this project, continuous wet batch was the best method for generating the cellular grout for this project. Wet batch uses slurry delivered by ready mix truck, with Aerlite-iX added downstream of CJGeo’s slurry pump.
Speak With An Expert
Facing a similar challenge to this New York pipe abandonment project? Give us a shout or shoot us a text. Click the state marker for the location of your project for contact info for the appropriate rep.
