Washington starts engineering on new sewer plant Posted By: Ben Butler May 8, 2009 @ 4:48 am Today's Local News Tweet Share Email The city of Washington will borrow about $780,000 for a phase of engineering on the new wastewater treatment plant. The money is being borrowed interest free through the Iowa Finance Authority. Mayor Sandra Johnson has expressed frustration because they can only obtain such loans for the engineering phases of the project, not construction.