Keyholing is becoming one of the most common ways to perform underground and sewer work in America. The concept is relatively simple, instead of lifting up a large area or creating a trench to work out of, you make a tactical hole that goes straight to the problem. This hole would act as a keyhole to where the problem is.
While this is just as effective as keyholing it also prolongs the duration of operation; it also is harmful to the environment and the civics of the area. Traffic becomes disrupted, and the ground becomes ravaged.
The first step for keyholing is taking a team of people with spectrometers and similar technology to detect where the leak is occurring. Then they would begin the keyholing process of digging a hole that is only 3-5 feet in diameter. In addition, from this point on you would take your vacuum truck and drain the area, from there you can continue the work and close up the area.
Keyholing has been praised as increasing efficiency, decreasing downtime for the vicinity and being a much more cost-effective way of performing the standard services.