The Rhode Island Public Utilities Commission will be holding a public hearing on a proposed National Grid rate increase on Tuesday, September 15th, at 6PM at the Middletown Town Hall, 350 East Main Rd., Middletown, RI. This proposed rate increase would result in an average customer bill increase of 11.2% per month. This increase, which would impact virtually all Rhode Islanders, follows a 5.2% rate increase in 2007 and a 21.7% increase in 2008.