(Richmond, IN)--A need for upgraded capacity at the Midwest Industrial Park could mean a sewer rate increase for Richmond residents.  The Sanitary District is in need of an additional $4 million over the next four years.  Corby Thompson with the firm Krohn & Associates explained the financial requirements to Richmond Common Council Monday night.  "What we ultimately have, again, is a series of three 6% rate increases plus one 3% rate increase in 2029 in order to make sure that we are getting enough funding for operations, maintenance, debt service, and all of the capital projects that are out there," Thompson said.  And, what that would mean to an average resident’s sewer bill.  "The impact to the bill is about a three-dollar increase per month," Thompson explained.  A public hearing on the proposed rate increase has been set for August 18.