Supervisors direct inspections and bids after reports of stagnant water, sinkhole and long‑running Buffalo Creek drainage concerns

Winnebago County supervisors and staff spent the meeting on detailed field reports and next steps after landowners and staff raised several drainage problems across the county.

The most immediate item discussed was a landowner request to clean about 4,000 feet of stagnant water in a lateral (identified in the discussion as Lateral 3). County staff and contractors said the stagnant water may indicate a downstream obstruction rather than a local blockage. Brian Helgeson (contractor) presented photographs and an estimate that county staff characterized as roughly $4 per foot; supervisors agreed to have Helgeson or county staff inspect further downstream before authorizing dredging or removing private culvert crossings. Scott (staff member and engineer) was referenced as the person who must review and engineer any replacement culverts put back in by landowners after district crews remove them for cleaning.

At Thompson, crews responded this week to a sinkhole and persistent clay‑tile blockages on Third and Second avenues. Jeremy (field crew/contractor) and Ethan (equipment operator) used a jetter to attempt clearing roots from a 12‑inch clay tile; discussion noted locations where roots, old clay tile and willow tree roots may be recurring failure points. Supervisors discussed installing access risers or a manhole (discussed sizes: 3‑foot vs. 4‑foot inside diameter) near the street edge so crews can jet in both directions without repeatedly digging up pavement. The board discussed the tradeoffs between repeated jetting (less invasive, recurring maintenance) and full tile replacement (disruptive, expensive, and may require city street repair if the tile is directly under a paved road). Several speakers emphasized that if the outlet or an upstream connection is disconnected or blocked, local cleaning will not permanently fix the problem.

Tile sizes and condition were noted at multiple points: speakers referenced 10‑inch and 12‑inch clay tile in different reaches and a 12‑by‑12 T fitting used to facilitate jetting. Supervisors asked staff to gather final maps and as‑built documentation from prior projects to confirm where old tile runs and where new alignments were installed. They also asked Jeremy for an estimate to install a riser/manhole and to include access and possible surface repair costs in the estimate.

Separately, Buffalo Creek — a longer, multi‑district waterway that several speakers called “old and tired” — drew extended discussion. Board members described prior efforts to annex reaches into a drainage district and said earlier preliminary engineering studies had cost about $5,000 to start. Supervisors discussed the complexities of forming a larger district that would cross county lines (Winnebago, Hancock and others were discussed), the need for landowner buy‑in, and the mechanics by which benefit and assessments would be determined by an engineer. No funding decision was made; supervisors described the next steps as: identify landowners, obtain updated engineering cost estimates, and, if enough landowner support exists, commission a minimal initial report to assess feasibility and benefit apportionment.

What happened next: staff were directed to (1) have Helgeson and Jeremy inspect the lateral and report whether the outlet or other downstream obstruction is the cause of standing water, (2) collect as‑built maps and final project documentation for recent tile replacements, (3) request an estimate for a riser/manhole installation at the Thompson site (including surface repair costs and who pays for city street repairs if the work requires digging in the paved right‑of‑way), and (4) gather contact lists and landowner interest for any Buffalo Creek study or potential district formation. No formal policy change or new district was approved at the meeting.

The discussion combined field condition reporting, contractor recommendations, and routine engineering clarifications; supervisors repeatedly cautioned against removing private culverts or digging pavement until staff confirm the downstream condition and engineering requirements.

Two administrative items related to the drainage agenda were noted later in the meeting: the board approved the minutes and agenda at the start of the session, and the board later approved county claims (voice votes).