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Engineers: JDD6 tile is shallow; cleaning downstream ditch and annexation likely needed before surface-channel fixes
Summary
ISG engineers told the Joint Drainage District 6 board that survey and LIDAR show limited tile cover in multiple locations and that the downstream open ditch is privately constructed; they recommended preconstruction reclassification, possible annexation of up to ~1,000 acres, and another informational landowner meeting before a hearing.
ISG engineers presented a revised preliminary report to the Joint Drainage District 6 (JDD6) joint meeting with O'Brien County, concluding that limited tile depth and a privately constructed downstream ditch constrain low-cost surface-channel options.
Spencer Peck, ISG, summarized the updated work: "We found that the ditch downstream of the main tile outlet was actually constructed privately and is not part of JDD6," he said, noting survey, LIDAR and invert data gathered since the April landowner meeting. Owen Olsen Brunson, ISG project manager, said survey points showed several areas where tile cover was shallow — in some places about a foot to a few feet of cover — raising concerns that a surface-channel (grass…
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