Inspectors seek cause of large diesel spill on Mississippi River near La Crosse
Inspectors are still trying to determine what caused the spilling of diesel fuel that spread for six miles on the Mississippi River near La Crosse.
The slick was first noticed last Thursday.
It happened between Dakota, Minn., and the river's Lock and Dam No. 7 near Dresbach. An estimated 1,000 gallons of diesel were spilled.