DEEP TUNNEL. The Deep Tunnel has prevented more than 116 billion gallons of pollution from getting into Lake Michigan. Thanks to the tunnel and many other improvements, MMSD has captured and cleaned 98.5% of all the water and wastewater that's entered the regional sewer system since 1994.
A once-in-a-decade maintenance project in the Milwaukee Metropolitan Sewerage District's (MMSD) Deep Tunnel drew to a conclusion last week, as crews removed the final pieces of floating debris that accumulated in the end of the system near the Jones Island Water Reclamation Facility.
The deep water tunnel is just one part of a $3-billion water pollution initiative that has also upgraded 400 miles (645 kilometers) of sewer infrastructure in Milwaukee and surrounding communities ...
The Remarkable Impact of the Deep Tunnel. Once widely maligned, the project was the key to transforming the Milwaukee River.
MILWAUKEE — It was an engineering marvel. Today, 20 years after it opened, Milwaukee's deep tunnel remains a major economic driver for the city but also a source of controversy.
Nov 11, 1988 · Three people were killed Thursday in an explosion in Milwaukee`s Deep Tunnel project, bringing to six the number of deaths since work on …
Designed and managed by the Milwaukee Metropolitan Sewerage District (MMSD), the Deep Tunnel is capable of holding up to 400 million gallons of storm and waste water runoff. Running about 300 feet below the surface, with tunnels 17 to 32 feet in diameter, the project took nine years to build.
How the Tunnel Works. Ranging from 17 feet to 32 feet in diameter, the Deep Tunnel — as it is known in Milwaukee — is 28.5 miles long, sits 300 feet below ground, and can store more than 500 million gallons of overflow stormwater and sewage during heavy or prolonged rains.
The Milwaukee Metropolitan Sewerage District (MMSD) began the Deep Tunnel project in 1977 in an effort to reduce the sewer system overflows that occurred after most major rainfalls. The first phase of Deep Tunnel opened in 1993, phase two opened in 2006 and phase three was completed in 2010.
Apr 09, 2007 · The tunneling contractor that was recently signed to a contract to build the next section of Milwaukee's deep tunnel project is being shut down by its parent company.