A recent chemical-related incident near Rock Valley is serving as a real-world example of what Sioux County’s Emergency Management Agency does behind the scenes.
Sioux County EMA Coordinator Ryan De Kruyf discussed the January 6th response to a reported explosion at Meadowvale Dairy west of Rock Valley during an appearance on The Daily Grind. Workers inside the facility reported hearing an explosion and experiencing eye irritation, prompting an immediate evacuation and a response from local emergency crews.
Because the chemicals involved were initially unknown, De Kruyf says responders took a cautious approach and requested assistance from Sioux City Fire Rescue’s hazmat team.
Using specialized software, the hazmat team evaluated the chemicals on site, wind conditions, and potential exposure risks. The leaking chemical was ultimately determined to be non-hazardous, air quality testing came back clear, and no injuries were reported. Nearby residents who were initially asked to shelter in place were later notified that it was safe.
De Kruyf says incidents like this highlight the importance of preparation and regional partnerships, especially for situations local departments don’t encounter often. He says that the last time hazmat was called to Sioux County was 2009.
Since taking over as EMA coordinator last summer, De Kruyf says much of his job focuses on planning for emergencies before they happen. While he may only be called out a few times a month, he says most of his work happens behind the scenes.
One area De Kruyf is working to expand is Sioux County’s drone program. He says the county is pursuing grant funding for a drone capable of operating in severe weather, with thermal imaging and range-finding technology that could assist with fires, missing-person searches, and disaster assessment.
De Kruyf also emphasized the importance of residents having multiple ways to receive emergency alerts, including weather radios and local radio stations.









