Because of the extensive cleanup ahead, the reopening of both lanes may be delayed until 10:30 p.m. Tuesday or 12:30 a.m. Wednesday.
Sgt. Kim Riley with Indiana State Police said he couldn't comment whether or not the law-enforcement agency is investigating.
The discovery now makes 145 pigeons found dumped in the same dumpster.
It happened early Friday afternoon at U.S. 24 and County Road 700 West, just east of Wolcott.
Investigators believe the 400-pound load of liquid fertilizer contributed to the rollover.