He could serve up to 20 years if convicted on all counts:
He faces a maximum sentence of:
•10 years in prison and a $250,000 fine for theft and bribery
•20 years and $1,000,000 fine for honest services wire fraud
•20 years and $250,000 fine for extortion
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Department of Justice Release
http://images.bimedia.net/documents/Cannon+Press+Release.pdf
DOJ Criminal Complaint
http://www.justice.gov/usao/ncw/forms/cannoncomplaint.pdf
Interesting article with some details of the activities which led to the arrest.