Oden v. City of Milwaukee, No. 2014AP130 March 3, 2015 by JLO An obvious gas line leak in the street presented a known and compelling danger which imposed a ministerial duty on the City to act. Therefore, the City had no immunity. Oden v. City of Milwaukee, No. 2014AP130 (Wis. Ct. App. Mar. 3, 2015).