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Blue Earth County approves $1M‑scale repairs for County Ditch 16 after final hearing
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Summary
After a public hearing and engineer presentation, the board approved a repair and financing order for County Ditch 16. The project will replace failing crossings, remove sediment and vegetation, add side‑inlets to capture sediment, and is estimated to be bid in December or January with construction in 2026.
Blue Earth County commissioners approved a repair and financing order for County Ditch 16 following a final hearing on Nov. 4, 2025. The board voted after hearing staff and the project engineer summarize the scope, costs and environmental coordination.
Craig Austin, Blue Earth County drainage staff, explained the hearing process and logistics, saying the "hearing notice was mailed out on 10/21/2025" and describing the ditch watershed and notification steps. ISG engineers then presented the repair report and plans. "So we recommend approval of the project, feel that the system is out of repair," ISG engineer Chuck Brando said, summarizing the firm's recommendation to move forward.
The engineer presentation described roughly 19,000 feet of mainline open ditch under review and repeated observations of sediment accumulation (over a foot in portions), gully erosion, failing private and public crossings and woody vegetation within the ditch buffer that reduces side‑slope stability. The plan calls for cleaning the mainline open ditch to legal grade where permitted, removing trees and heavy vegetation within the ditch buffer (red hatch on project maps), replacing deteriorated crossings with reinforced concrete pipe, establishing two additional maintenance crossings (crossings 6 and 7), regrading buffers and installing side inlets (ASIs) to trap sediment. The firm estimated the project will keep about "500 tons a year of sediment" out of the ditch system through ASIs and related measures.
Engineers said they would not perform work inside Knights Lake or a named public water wetland because of ordinary high water constraints and that they had coordinated with the Minnesota Department of Natural Resources. The presentation noted coordination with MnDOT because of grading within State Highway 30 easements; a MnDOT permit was pending. The engineer said bids would likely be issued in December or January and that construction would occur in 2026 if permits and bids proceed as expected.
Project cost details presented at the hearing put the total just over $1,000,000. After an ASI funding application with the local SWCD (soil and water conservation district), the net landowner cost shown in the materials was $981,007.29; staff said temporary disturbance for regrading and access was estimated at about 14 acres (roughly 12 acres of buffer regrading accounted for in the cost estimate).
A landowner question at the public comment period raised timing of drainage from the ASIs. Dale Wisher asked whether the inlets would "raise it up so that water does not exit in a timely fashion." The engineer replied ASIs are sized to drain within a 24‑hour period and are designed to limit crop impacts, sometimes including a pipe drop inlet or riprap overflows where larger flows occur.
The board approved the financing and repair order by motion after public comment. Commissioners and staff thanked landowners for participating in prior informational meetings. The record indicated the project team will notify the DNR when working near public waters and will await MnDOT approval for easement work before moving to bid.
Ending: Following approval, staff said they would proceed with permitting and the bid schedule; construction is anticipated in 2026 pending the MnDOT permit and successful bidding.
