WAUKEE, Iowa — The Iowa Department of Natural Resources says a diesel fuel spill that occurred on Saturday has since made its way into Little Walnut Creek.

The Des Moines DNR Field Office was notified of a diesel fuel spill at an agricultural site near Dallas County on Saturday. At approximately 2:30 a.m., an above-ground tank began leaking diesel fuel, releasing an estimated 4,000 gallons, according to the DNR.

The DNR says a majority of the fuel was contained on-site, in a nearby pond, and in the immediate area surrounding the storage tank. Later in the day, Waukee residents near Little Walnut Creek reported strong fuel odors.

Local officials confirmed that an unknown amount of diesel fuel had entered the creek. The Little Walnut Creek outlets into the Walnut Creek, located in the Clive area. Absorbent booms were placed in Little Walnut Creek to limits the spread of the contamination.

No dead fish have been reported along the affected section of the creek, according to DNR officials. While the public is advised to stay out of the creek at this time, the DNR reports there is no health threat.

Local officials and the DNR are actively monitoring the situation and will follow up with the city for further assessment. The cause of the spill remains under investigation.

To report a release after hours, please call the DNR’s emergency spill line at (515) 725-8694. Quick reporting can help DNR staff identify the cause of an incident. The DNR website has more information about spill reporting requirements.