They're posted on the website here https://saintpetertheapostlejoplin.com/ For quick reference, 5:15pm Saturday and 9:00am, 11:15am, and 6:00pm on Sunday.
I agree. If you're just passing through, like I am, it would be nice or just to see the answer in the comments instead of going out to search the website.
They are posted. On sign in front of church and on web site
The Mass times are posted outside the front of the church and on the church website.
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