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Wright County supervisors seek independent estimate of drainage-tile risk from seismic testing; ask developer to pay assessment
Summary
Supervisors discussed potential damage to drainage tile from seismic testing by Twin Rivers and supported hiring Agravia to produce a countywide, conservative damage estimate paid for by the company proposing testing.
Wright County supervisors said they want an independent estimate of potential damage to drainage tile and crop yields before allowing expanded seismic testing, and that the company pushing for different setback rules should pay for the study.
The board discussed a proposal from Jacob Hagen and Tyler Deering of Agravia to produce a county-level, conservative estimate of two categories of potential loss: repair costs for crushed or damaged drainage tile and crop-yield losses where drainage effectiveness would decline. Agravia described a methodology using county GIS, historical work orders and soil-type yield tables to produce an initial “big‑number” estimate that could be refined if landowners later file claims.
The issue matters because Twin Rivers — a developer proposing underground testing across roughly 400 miles of county roads, according to the discussion — asked the county to accept a smaller buffer around test…
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