929 N.W.2d 547
Wis.2019Background
- Village of Stetsonville operates a wastewater system with a main lift station; a portable bypass pump can discharge untreated wastewater to a ditch to avoid backups.
- Former public works director orally communicated a "rule of thumb" (pump or set pump at certain ladder rungs in the lift station), never written or adopted by the Village Board; employees gave inconsistent descriptions of the rule.
- During a heavy storm on Sept. 10, 2014, Village employees delayed or coordinated bypassing; wastewater backed up into Alan Pinter’s basement causing damage.
- Pinter sued for negligence and private nuisance; Village moved for summary judgment asserting governmental immunity under Wis. Stat. § 893.80(4) and argued plaintiff lacked expert proof of causation for the nuisance claim.
- The circuit court and court of appeals granted summary judgment for the Village; the Wisconsin Supreme Court affirmed.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether the Village's oral "rule of thumb" created a ministerial duty (so immunity does not apply) | Pinter: the fourth‑rung rule was clear and compelled employees to act, making the duty ministerial | Village: the rule was a discretionary, informal guide involving judgment; DNR rules require discretionary assessments before bypass | Held: The oral rule was discretionary, not ministerial; § 893.80(4) immunity applies to negligence claim |
| Whether the known-and-compelling-danger exception defeats immunity | Pinter: human sewage in basement was a known, compelling danger | Village: took precautionary measures (e.g., mobilized pump truck), so exception does not apply | Held: Court of appeals’ conclusion that exception did not apply went uncontested by Pinter; majority did not reach a contrary conclusion |
| Whether Pinter’s private nuisance claim (based on alleged negligent maintenance/infiltration) could proceed without expert evidence of causation | Pinter: expert testimony not required; lay testimony and common sense suffice to show infiltration and causation | Village: causation (extent and timing of infiltration vs. decision not to bypass) is technical and beyond lay comprehension; expert proof required | Held: Expert testimony was required on causation; absent such evidence Pinter failed to raise a genuine issue of material fact and nuisance claim fails |
| Whether summary judgment was appropriate overall | Pinter: factual disputes and inferences preclude summary judgment | Village: immunity and lack of causation evidence warrant judgment as a matter of law | Held: Summary judgment affirmed — immunity bars negligence claim and lack of expert causation proof defeats nuisance claim |
Key Cases Cited
- Lister v. Board of Regents of University of Wisconsin System, 72 Wis.2d 282 (defines ministerial duty vs. discretion)
- Pries v. McMillon, 326 Wis.2d 37 (explains immunity exceptions and ministerial/discretionary distinction)
- Willow Creek Ranch, L.L.C. v. Town of Shelby, 235 Wis.2d 409 (identifies immunity exceptions including ministerial duties)
- Milwaukee Metropolitan Sewerage District v. City of Milwaukee, 277 Wis.2d 635 (municipal immunity in nuisance context depends on character of negligent acts)
- Menick v. City of Menasha, 200 Wis.2d 737 (plaintiff failed to survive summary judgment absent expert proof of causation in sewer/ flooding case)
- Engelhardt v. City of New Berlin, 385 Wis.2d 86 (stare decisis and adherence to long‑standing governmental immunity jurisprudence)