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Winnebago County defers DD 18 Lot 16 culvert after landowner objections; engineer recommends survey
Summary
County engineer recommended a 24–30-inch culvert for a proposed intake near DD 18 Lot 16, but neighboring landowners warned it could increase erosion. The board directed survey work and tabled action until spring for a detailed plan.
Winnebago County board members paused a decision on adding a culvert and intake near DD 18 Lot 16 on a motion to table, after engineers and landowners disagreed over likely effects and the necessary design work.
Scott, the county engineer, presented a sizing estimate based on software and field calculations, saying the models "told me something similar, which is a 24 or 30-inch culvert is what we would expect to be there." He said the team has not yet completed survey work to set ditch-bottom elevations and that locating the culvert off-center from existing tiles would protect access for future tile repairs.
The nut of the dispute centered on whether the smaller culvert would move too much water downhill and create erosion on adjacent fields. One neighboring landowner told the board a smaller tile could worsen conditions on his land: "You're gonna make a gully with a 24-inch tile with a big rain." The landowner pressed for more precise depth information and field shots before the board approved construction.
Engineer testimony and several participants emphasized that the county is not proposing to alter the tile system's direction or flow, but rather to restore an older, likely natural flow disrupted when the road was built. The transcript records an explicit procedural clarification that adding the culvert could require reclassification of the drainage district "under the Iowa statute," a step that would carry additional legal steps.
Given outstanding questions about ditch elevations, the condition of an adjacent 100‑year‑old plate tile and the need for a layout that avoids creating new erosion, the board directed staff to perform a GPS/survey of both ditch sides and to return in the spring with a plan and cost estimate. The board tabled the matter for later review rather than approving construction now.
Next steps: county staff will perform survey work to determine ditch-bottom elevation and culvert depth options and present a revised plan and priority ranking to the board in the spring. The project remains subject to any reclassification requirements under Iowa drainage law.
