The Ottawa City Council approved three infrastructure projects to upgrade the city’s water and sewer systems during its regular meeting Tuesday.

Among three separate agenda items, the city hired Renwick & Associates to design and construct new storm sewers on Madison, Armstrong, Sanger, Jackson and Jefferson streets as part of the city’s long-term sewer separation plan.

According to city documents, engineering design for the project will cost $132,510, with construction estimated at $108,420.

Etscheid, Duttlinger & Associates will replace about 3,000 feet of water mains along the 1200 through 1500 blocks of Illinois Avenue, from Boyce Memorial Drive to Leland Street, for $124,800.

Also, the city hired Pizzo & Associates to perform a controlled burn at the city’s wastewater treatment lagoons to remove invasive plants and maintain the facility’s operations.

The cost for that project is $8,375, according to city documents.