51.   The rest are connected to public sewer systems, Mrs. LaChance said.

52.   The three resistance fighters, who came to be known as the Avengers, escaped through the sewer system to the swampy forests nearby.

53.   The towns where the schools are located have no sewer systems.

54.   They are permitted only in areas of the city with modern sewer systems that have separate pipes for storm runoff and household waste.

55.   This theory is much like the famous legend that there are alligators lurking in the New York sewer system.

56.   Typhoid fever is more common in areas around the world with less sanitation or contaminated sewer systems.

57.   Urban planners urge local governments to do a better job of fixing crumbling bridges, roads and sewer systems.

58.   Water, the only waste from the process, will be discharged to the city sewer system in compliance with permit limits, Appel said.

59.   Water flowing from three directions gathered in the low-lying area Monday and overwhelmed the sewer system.

60.   Venting anything other than the sewer system into a stack like that will probably not hurt anything, but it is illegal to do so.