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# Substance on roads near Erwinville was likely muddy water, Sheriff's Office says
- URL: https://www.wbrindependent.com/unknown-substance-poydras-bayou-rosedale-road-erwinville/
- Published: 2026-09-30T18:17:17.000Z
- Updated: 2026-09-30T23:12:58.000Z
- Description: Hazardous materials crews were sent to check an unknown substance on the roadway along Poydras Bayou Road and Rosedale Road near Erwinville on Wednesday. The Sheriff's Office said there were no closures.
- Author: John Summers
- Tags: Emergency Services

**UPDATE, 6:10 p.m. Sept. 30:** The substance found on Poydras Bayou Road and Rosedale Road on Wednesday was most likely muddy water that leaked from a gravel or sand truck, the West Baton Rouge Sheriff's Office said.

Sgt. Landon Groger, the Sheriff's Office spokesman, said in a text message around 6:10 p.m. that investigators are "confident it was just slop," or a large amount of muddy water. He said the water had been put into the bed of a gravel or sand hauler and leaked out of the truck's back gate. Groger said that conclusion is based on the Sheriff's Office's investigation and the information it gathered.

Groger said the Sheriff's Office had not heard back from hazardous materials crews as of Wednesday evening. "No news is good news in this situation," he said.

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*Original story:*

Hazardous materials crews were headed Wednesday afternoon to check an unknown substance found on the roadway along Poydras Bayou Road (LA 413) from U.S. 190 in Erwinville to Rosedale Road (LA 76), and along Rosedale Road to the Iberville Parish line, the West Baton Rouge Sheriff's Office said.

Groger said in a text message that there was "no public concern at this time" and no road closures as of about 12:50 p.m. Wednesday.

Groger said investigators were reviewing surveillance video to identify a truck and, most importantly, its placard. Trucks hauling hazardous materials are required to display placards that identify the type of material they carry.