Today we returned to two of the fourteen culverts in which HydraTech field paved the invert four years ago. I showed Caleb Rutledge the culverts and found that the concrete looked as good as it did right after the project was completed all those years ago. The flow was heavy, but the concrete was resilient.
 

Many culverts become compromised at the invert due to being in nearly constant contact with water. The culvert could begin to suffer from infiltration. We suggest field paving these culverts over replacing them, as a replacement has a bigger impact on the road above and costs more. These culverts took about two weeks, but the schedule maybe a bit different culvert to culvert. How severe is the drop off from the road to the entrance, how thick is the vegetation, can concrete be pumped down, and how heavy is the flow, all play a role in the process. We went in, cleaned out the debris, constructed a cofferdam, bypassed the flow of water, laid wire mesh and rebar, and then coated the invert with concrete. The top of the corrugation gets a minimum of 3” of concrete. In about two weeks HydraTech Field Services provided this culvert with a lifetime of protection. 

Original Project Video