Louisville residents will likely see their monthly sewer bills go up in August to cover the costs of a federally mandated plan to clean up the city’s waterways.

This week, the Metropolitan Sewer District Board approved a plan to increase wastewater bills by an average of $3.47 and stormwater bills by about $.68 cents per month.

The MSD Board will vote on the 6.9 percent rate hike at a meeting in July.

More than half of the $205 million generated from the rate increase is slated for the construction of the city’s Waterway Protection Tunneland similar projects that aim to stop the city’s combined sewer system from overflowing into the Ohio River and Beargrass Creek.