What is that plant or factory in near Martinsburg WV right off of route 9 it's a tall structure and very well lit up at night?

Answer 1

You're probably talking about the Essroc cement plant.

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Answer #2:

You don't say WHERE on Route-9, or which direction off of it ... giving us

not much to go on.

The first answer is a good one. The business address of ESSROC Cement is

1800 South Queen Street, Martinsburg 25401. South Queen St is Route-45,

and that address is right at the Route-45 exit off of Route-9. The large

structures of the plant are about 1/2 mile southwest of there.

Answer 2

The facility you are referring to is most likely Procter & Gamble's manufacturing plant in Martinsburg, West Virginia. It is a large factory that produces a variety of consumer goods, and its tall structure is often well-lit at night.