This hole was closed today due to maintenance.
Here's why:
* "Was closed" is the correct past tense form of the verb "to close," as the hole is no longer open.
* "Due to" is the correct preposition to use in this context.
You could also say:
* "This hole is closed today for maintenance."
* "Maintenance has closed this hole today."
These options are grammatically correct and convey the same meaning.