LONDON — London will start building a “super sewer” to help clean the sewage pollution in River Thames, according to a press release.

The approximately 15.5-mile Thames Tideway Tunnel will run underground from Acton storm tanks in West London, traveling the line underneath the river to Abbey Mills Pumping Station in East London, where it will connect to the Lee Tunnel, stated the release.

The release reported that the sewage collected from the 34 most polluting discharge points along River Thames in Central London will be taken through the Lee Tunnel to Beckton sewage works for treatment.

Last year 55 million tons of sewage polluted the River Thames, which is significantly more than the average 39 million tons that discharges in a typical year, continued the release.

“If the tunnel had been in operation last year, it would have captured 97 percent of the sewage that poured in to London’s river,” said Thames Tideway Tunnel Chief Executive Andy Mitchell. “Hardly a week goes by when untreated sewage is not pouring in to London’s river, and we are pleased that we can now start to tackle this archaic problem.”

You can find the release here.