********************Below is the information I requested from CIC*****************
Please do not reply to this email.
Date: 2015-07-27
Sir, Madam,
Thank you for contacting Citizenship and Immigration Canada. I am pleased to follow up on your request:
Re-entry to Canada with Original Temporary Resident Visa (TRV)
Generally, a new single-entry Temporary Resident Visa (TRV) or a multiple-entry TRV is necessary to re-enter Canada as a visitor, student or worker.
As an exception, you can ask to re-enter Canada with your original TRV, even if it is expired, if:
You will only visit the U.S.* or St. Pierre and Miquelon and will return to Canada before the end of your authorized stay.
An officer will ask you questions to make sure you meet all of the requirements before allowing you to re-enter Canada. If you visit any country other than those listed above, you will need a new TRV.
*Including its Territories and Possessions.