From the DNR fish kill database:

Off intersection of 355th [Believe this to be a typo, think they meant 535th Ave] Ave and 310th St, Section 15 of Palestine Twsp. The kill was localized as far as could be determined along an approx. 40 meter stretch. No dead fish were observed downstream from this vicinity. Live minnows, apparently under some stress as observed by their surfacing actions, were swimming in a deeper pool just upstream of the location of the dead fish. Cause believed due to manure.

According to DNR’s assessment/listing methodology, the occurrence of a single pollutant-caused fish kill, or a fish kill of unknown origin, on a waterbody or waterbody reach during the most recent assessment period indicates a severe stress to the aquatic community and suggests that the aquatic life uses should be assessed as “impaired.” If a cause of the kill is identified, and the cause is either known, or suspected, to be a “pollutant”, the assessment type is considered “monitored” and the affected waterbody is a candidate for Section 303(d) listing. Fish kills attributed to a pollutant, but where a source of the pollutant was not identified and/or where enforcement actions were not taken against the responsible party, will be placed into Integrated Report subcategory 5b. The intent of placing these waterbodies into Category 5 is not to necessarily require a TMDL but to keep the impairment highlighted due to the potential for similar future kills from the unaddressed causes and/or sources. DNR records show no evidence that restitution was sought by DNR for the value of the fish killed or costs of investigation. Thus, this assessment will be placed in IR Category 5b for the 2018 IR Cycle.