A small manufacturing business is moving to a new location, and seeks
an intern to help develop and implement a plan. I am seeking intern
job descriptions as a model for creating my own.

HI,
Can you give us some more information?  Interns usually are assigned
to an area:  accounting, production, sales, general management, .... 
What is your background for the internship?  Who will or would you be
reporting to?   How long is the internship?  Will you possibly be
staying with the company or being returning to further education?

Sorry, that is a lot more questions than you asked, but I hope that
you can see the appropriateness of them.