This case study demonstrates the applicability of the AC Interference Mitigation (ACIM) design method (reported in our preceding paper, C2023-18983) under the conditions of unavailable power data for collocated powerlines and for multiple pipelines that are electrically connected. It was assumed that field AC voltage readings were collected from test stations along at least one pipeline. The procedure is as follows: 1. Estimate the power loads of the powerlines using a trial-and-error method via simulating the AC voltage profile(s) of the pipeline. 2. Validate the predictive model that is based on the estimated current loads with AC voltage readings of the other pipelines, if applicable. 3. Execute ACIM design when necessary. 4. Validate effectiveness of the recommended ACIM action via new field AC readings collected from test stations along the pipelines after the ACIM is applied.