Problem In Knoxville, Tennessee, the Knoxville Utility Board (KUB) discovered a broken eight-inch pipe near a 54-year old manhole. The broken pipe was weakening the soils around the manhole and creating voids in the soil as large as 33 inches. Left unchecked, the voids and ever-weakening soils would eventually have caused the street to collapse. This would have been catastrophic as the pipe was situated in a busy riverfront avenue adjacent to Neyland Stadium. Analysis URETEK performed soil density tests and identified weak soils and voids as far down as 25 feet. The KUB chose to use URETEK’s Deep Injection ® (UDI) method because it offered a fast, inexpensive solution without the need to excavate. URETEK crews placed a grid pattern over the area where UDI would take place. Solut

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