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Parish reports brief, isolated vibration events; acoustic monitoring to be added
Summary
Parish staff told the council three ground-vibration meters recorded four short, isolated events at one location between April 3–20; none exceeded residential thresholds under the DI4150-3 standard. Officials said acoustic monitors will be installed to expand monitoring and results will be posted for residents.
Parish staff reported to the Iberville Parish Council that three vibration meters were installed at sites of local concern and logged data from April 3–20. According to the vendor report presented to the council, "there were four vibration events that occurred between April 3rd and April 20th" and "all of the events were isolated to one location." Staff said each event was a brief spike that lasted only a few seconds and did not exceed the residential guideline thresholds under the DI4150-3 standard used for mechanical-oscillation monitoring.
The parish said two meters are on private property and one is on public property (to serve as a control) and that the vendor provides cloud-hosted data with frequent updates. Officials told the council they plan to add acoustic (sound) monitoring devices next to vibration meters to better correlate air-borne noise with ground motion and to post monitoring data so residents can compare complaint times against instrument records.
Council members and residents asked for clear public access to the data and for complaints to be logged (staff suggested using 911 to create a timestamped record that staff can later compare with sensor data). The parish described the work as ongoing and said it will continue to expand monitoring to better determine causes and patterns.
