Question: Which system is connected to Des Plaines river, Houston Ship Channel or Chicago Sanitary and Ship Canal?
Context: The Lockport Powerhouse is a dam used by the Metropolitan Water Reclamation District of Greater Chicago to control the outflow of the Sanitary and Ship Canal and limit the diversion of water from Lake Michigan into the Des Plaines River. Buffalo Creek is an 11.2 mi tributary of the Des Plaines River.  It begins in Lake Zurich, Illinois and flows mainly south-eastward through Kildeer, Long Grove, Buffalo Grove and Wheeling.  In Wheeling, it is named Wheeling Drainage Ditch.  It joins the Des Plaines River next to Chicago Executive Airport. The Chicago Sanitary and Ship Canal, historically known as the Chicago Drainage Canal, is a 28 mi canal system that connects the Chicago River to the Des Plaines River.  It reverses the direction of the Main Stem and the South Branch of the Chicago River, which now flows out of Lake Michigan rather than into it.  The related Calumet-Saganashkee Channel does the same for the Calumet River a short distance to the south, joining the Chicago canal about half way along its route to the Des Plaines.  The two provide the only navigation for ships between the Great Lakes Waterway and the Mississippi River system. The Houston Ship Channel, in Houston, Texas, is part of the Port of Houston, one of the US's busiest seaports.  The channel is the conduit for ocean-going vessels between Houston-area terminals and the Gulf of Mexico, and it serves an increasing volume of inland barge traffic. The Des Plaines River Valley Bridge is a post-tensioned concrete girder bridge in the northeastern portion of the U.S. state of Illinois.  It carries Interstate 355 (I-355) over the Des Plaines River, the Chicago Sanitary and Ship Canal, the Illinois and Michigan Canal, several railroad lines, Bluff Road, New Avenue and a forest preserve.  It is officially named the Veterans Memorial Bridge.  There are title plaques on the square pillars at the north and south entrances to the bridge.  The bridge is 1.3 mi long. The Ninth Street Seven Arch Stone Bridge was a historical bridge in Lockport, Illinois.  The bridge was the region's first over the Des Plaines River, facilitating trade between farmers west of the river and merchants in Lockport.  Farmers were previously forced to use a ford, located near 9th Street.  It was approved on March 20, 1868, and cost $4,000.  The arch bridge was constructed using locally quarried limestone in eight to twelve inch blocks.  Each arch of the bridge spanned 197 foot .  The builder is unknown, but may have been Julius Scheibe, a notable local mason who built many of the city's stone structures of the era.  Schiebe was also a highway commissioner during the bridge's construction.  A concrete slab had to be added to the foundation of the bridge in the early 1900s due to increased water levels caused by the Chicago Sanitary and Ship Canal.  The Ninth Street Seven Arch Stone Bridge was closed to traffic in 1971 and was added to the National Register of Historic Places in 2004. Isham Randolph (March 25, 1848 in Clarke County, Virginia – August 5, 1920) was an American civil engineer who is best known as the chief engineer of the Sanitary District of Chicago during the construction of the Chicago Sanitary and Ship Canal.  Randolph had no formal engineering training, he began his career as a railroad axeman.  After completing the Chicago Sanitary and Ship Canal, at the time the largest canal in the world, Randolph became a consulting engineer on the Panama Canal at the request of the Roosevelt Administration. Thomas J. O’Brien Lock & Dam is a lock on the Calumet River on the south side of Chicago.  The Calumet River is a tributary to the Chicago Sanitary and Ship Canal.  This flows into the Des Plaines River, the Illinois River and then the Mississippi.  It is 326 river miles from the Mississippi-Illinois confluence.  The up river side of the dam is at Lake Michigan's level, 577 feet above sealevel.  The lock dimensions are 1000' x 110' feet. The Chicago Portage National Historic Site is a National Historic Site in Lyons, Cook County, Illinois, United States.  It is located in Chicago Portage Forest Preserve, at the junction of Portage Creek with the Des Plaines River, on the west side of Harlem Avenue on the line of 48th Street.  Preserved within the park is the western end of the historic portage linking the Chicago River to the Des Plaines River, thereby linking the Great Lakes to the Mississippi River.  A memorial depicting the portage of the French explorers is located at the parking area.  A trail leads from the memorial down into the portage wilderness area. The Mile-Long Bridge is the colloquial name for a 1404.5 m bridge in the northeastern part of the U.S. state of Illinois.  The bridge carries Interstate 294 over the Des Plaines River, the Chicago Ship and Sanitary Canal, numerous railroad lines, and the United Parcel Service intermodal facility.  A series of 51 piers carries I-294 over the broad Des Plaines River valley.
Answer: Chicago Sanitary and Ship Canal