Diakont Robotic Pipeline Inspection Services Tackle Challenges of Unpigglable Pipelines Under River Crossings Diakont was commissioned to assess the integrity of three major North American large diameter natural gas pipelines that crossed beneath rivers. The pipelines had multiple bends and low-flow, making them ‘unpiggable’ using traditional in-line inspection (ILI) methods. They also required the use of a tethered device to guarantee a successful retrieval. Each pipeline inspection case had unique characteristics that required specialized robotic solutions. The following sections provide details for each case study. Mississippi River Crossing – Diakont was commissioned by the pipeline operator to further investigate an anomaly previously found by a traditional in-line inspection. The

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