The existing North Olmsted separate sanitary sewer system consists of approximately 840,000 lineal feet (approximately 159 miles) of separate sanitary sewer, ranging in sizes between eight inches in diameter to 42 inches in diameter.
The resulting sanitary sewer system became configured around a naturally occurring drainage divide. This divide runs in a southwest to northeast direction through the center of the city. Areas north of the drainage divide flow to Lake Erie through a series of structurally altered but naturally occurring water courses, such as creeks and ditches. Areas south of the drainage divide flow to Rocky River through a series of structurally altered but naturally occurring water courses. A major thoroughfare in the city, Lorain Road, is located on this divide.
The existing sanitary sewer system took approximately fifteen years to build. The initial construction contracts were awarded in 1960 and the final construction contracts were finished in 1974. On going rehabilitation continues within the sanitary sewer system.
Due to the naturally occurring Lake Erie/Rocky River drainage divide dissecting the city, the North Olmsted Sanitary Sewer System was built with four separate sanitary sewer pump stations. These pump stations are located along the northern edge of the North Olmsted Corporate boundary.
In 1994, a fifth separate sanitary sewer pump station was constructed. The fifth station serves the Moen commercial development next to the Columbia Road/Interstate 480 intersection. This station was necessary due to the elevation of the commercial development versus the elevation of the North Olmsted sanitary sewer system near the development.
The City constructed three underground equalization storage tanks to help alleviate flooding during significant rainfalls. In 1997 Tank A was put in at Clague Park located Northeast end on North Olmsted with a capacity of 217,000 gallons. In 2012 Tank B was installed also at Clague Park with a capacity of 1.25 MG and in 2013 the third tank was installed at Dover pump station Northern edge of North Olmsted with a capacity of 360,000 gallons. These EQ tanks have greatly reduced residential back-ups and sanitary sewer overflows.