Question: Of which river is the river Kichi Sipi Bridge crosses a tributary?

Context paragraphs:
paragraph_text: Gaskins Run is a tributary of the Susquehanna River in Montour County and Northumberland County, in Pennsylvania, in the United States. It is approximately long and flows through Liberty Township, Montour County, Mahoning Township, Montour County. The watershed of the stream has an area of . At least one bridge crosses the stream. It is considered to be both a Coldwater Fishery and a Migratory Fishery.
title: Gaskins Run
paragraph_text: Hammersley Fork (also known as Hammersley Fork Creek) is a tributary of Kettle Creek in Potter County and Clinton County, Pennsylvania, in the United States. It is approximately long and flows through Warton Township in Potter County and Leidy Township in Clinton County. The watershed of the stream has an area of . The main rock formation in the watershed is the Pottsville Formation. A number of bridges cross the stream.
title: Hammersley Fork
paragraph_text: Old (16th Avenue) Bailey Bridge was a bailey bridge located on 16th Avenue (York Regional Road 73) east of Reesor Road within Rouge Park in Markham, Ontario, Canada. The bridge crossed the Little Rouge Creek, a tributary of the Rouge River.
title: 16th Avenue Bailey Bridge
paragraph_text: West Branch Run (also known as West Branch Little Fishing Creek ) is a tributary of Little Fishing Creek in Lycoming County and Columbia County, in Pennsylvania, in the United States. It is approximately long and flows through Jordan Township, Lycoming County and . The area of the stream's watershed is . The stream's only named tributary is Shingle Run. West Branch Run flows through a valley known as California Hollow, which is listed as a "locally significant site" on the Columbia County Natural Areas Inventory. The Shoemaker Covered Bridge also crosses the stream, as does at least one other bridge in Lycoming County.
title: West Branch Run
paragraph_text: Mud Run is a tributary of Green Creek in Columbia County, Pennsylvania, in the United States. It is long and flows through Greenwood Township. The stream's watershed has an area of 13.3 square miles and is located in Greenwood Township, Orange Township, and Mount Pleasant Township. The stream is in the ridge and valley physiographic province. Its annual load of sediment is . The Kramer Covered Bridge crosses the stream.
title: Mud Run (Green Creek tributary)
paragraph_text: The Konrad Adenauer Bridge (in German: Konrad-Adenauer-Brücke) is one of two road bridges crossing the Rhine between the German cities of Mannheim and Ludwigshafen am Rhein. The other bridge is the Kurt Schumacher Bridge.
title: Konrad Adenauer Bridge
paragraph_text: The Dartford - Thurrock River Crossing, commonly known as the Dartford Crossing and until 1991 the Dartford Tunnel, is a major road crossing of the River Thames in England, carrying the A282 road between Dartford in Kent to the south with Thurrock in Essex to the north. It consists of two bored tunnels and the cable - stayed Queen Elizabeth II Bridge. The only fixed road crossing of the Thames east of Greater London, it is the busiest estuarial crossing in the United Kingdom, with an average daily use of over 130,000 vehicles. It opened in stages: the west tunnel in 1963, the east tunnel in 1980 and the bridge in 1991. The crossing, although not officially designated a motorway, is considered part of the M25 motorway's route, using the tunnels northbound and bridge southbound. Described as one of the most important road crossings in Britain, it suffers from heavy traffic and congestion.
title: Dartford Crossing
paragraph_text: Blackfriars Railway Bridge is a railway bridge crossing the River Thames in London, between Blackfriars Bridge and the Millennium Bridge.
title: Blackfriars Railway Bridge
paragraph_text: The Marquette–Joliet Bridge is a bridge crossing the Mississippi River, connecting Marquette, Iowa and Prairie du Chien, Wisconsin. Local residents refer to the bridge as the Prairie Bridge or the Marquette Bridge; both terms are used equally.
title: Marquette–Joliet Bridge
paragraph_text: The Petroleum Street Bridge is a girder bridge connecting the North Side and South Side neighborhoods of Oil City, Pennsylvania and crosses the Allegheny River. The bridge sits just downstream from the confluence of Oil Creek and the Allegheny River. The 1995 structure carries two lanes of U.S. Route 62 and was built during a decade of major refurbishments of Upper Allegheny crossings. Previously, a 1910 truss bridge stood on the site; this structure replaced an earlier wooden bridge.
title: Petroleum Street Bridge
paragraph_text: The Delaware Memorial Bridge is a twin suspension bridge crossing the Delaware River. The toll bridges carry Interstate 295 and U.S. Route 40 between Delaware and New Jersey. The bridge was designed by the firm known today as HNTB with consulting help from engineer Othmar Ammann, whose other designs include the Walt Whitman Bridge (which is similar in appearance, except for the fact that it is a single span) and Verrazzano-Narrows Bridge. It is also one of only two crossings of the Delaware River with both U.S. Highway and Interstate Highway designations, the other being the Benjamin Franklin Bridge.
title: Delaware Memorial Bridge
paragraph_text: The Ledyard Bridge crosses the Connecticut River to connect Hanover, New Hampshire to Norwich, Vermont. It is the third bridge at this crossing to bear the name of the adventurer John Ledyard.
title: Ledyard Bridge
paragraph_text: Wami Bridge is a bridge in Tanzania that crosses the Wami River. It lies on the A14 highway between Chalinze and Segera junctions.
title: Wami Bridge
paragraph_text: The Taemas Bridge is a two-lane road bridge crossing the Murrumbidgee River in New South Wales, Australia. The bridge crosses on the river just before it enters Lake Burrinjuck, which has been created by the Burrinjuck Dam. The bridge is a key part of the road between Yass and Wee Jasper, and from there, to Tumut. The bridge is around 26 kilometres from Yass and 22 kilometres from Wee Jasper. The current bridge was completed in 1931 and is over 200 metres in length.
title: Taemas Bridge
paragraph_text: The Saint-Maurice River (Atikamekw: "Tapiskwan sipi") flows North to South in central Quebec from Gouin Reservoir to empty into the Saint Lawrence River at Trois-Rivières, in the province of Quebec, in Canada. From its source at Gouin Reservoir, located at the same latitude as the Lac Saint-Jean, the river has a total drop of about 405 meters, to finally reach the St. Lawrence river at Trois-Rivières. The river is 563 km in length and has a drainage basin of 43,300 km² (16,700 sq.miles). Saint-Maurice river is one of the most important tributaries of the St. Lawrence river.
title: Saint-Maurice River
paragraph_text: The Hochdonn High Bridge ("Hochbrücke Hochdonn" in German) is a railway bridge in the Marsh Railway crossing the Kiel Canal near Hochdonn, Germany. It is a riveted steel bridge, "exposed to extreme railway traffic".
title: Hochdonn High Bridge
paragraph_text: The Napan River in Canada is a tributary of the Miramichi River in New Brunswick, Canada. The river rises several kilometres southwest of Chatham in central Northumberland County and flows northeast into the Miramichi River at Napan Bay. Four bridges cross the river at various points: at Hannah Lane, Highway 11, Johnston Lane, and Highway 117. There was also once a crossing at White Lane. At one time, these bridges were covered, although all have been upgraded to steel and concrete structures.
title: Napan River
paragraph_text: Fort Nelson, a historic Hudson's Bay Company trading post, was at the mouth of the Nelson River at Hudson Bay and was a key trading post in the early 18th century. After his pivotal role in establishing the Hudson's Bay Company, Pierre Esprit Radisson, noted French explorer, was chief director of trade at Fort Nelson during one of his sustained periods of service to England. Today, Fort Nelson no longer exists. Port Nelson, the abandoned shipping port, remains on the opposite side of the river mouth on Hudson Bay.
title: Nelson River
paragraph_text: The Kichi Sipi Bridge spans a deep channel of the Nelson River south of Cross Lake, providing the only all-weather road link between eastern Manitoba and the rest of Canada and North America. Its origins are unusual and its technology innovative. At 850 feet, it is the second longest road bridge in Manitoba.
title: Kichi Sipi Bridge
paragraph_text: The Werra viaducts near Hedemünden, Germany are two bridges crossing the valley of the river Werra. They are located in southern Lower Saxony and provide crossings for the A 7 motorway and the Hanover-Würzburg high-speed rail line. The bridges are located 33 metres apart from each other.
title: Werra Viaduct, Hedemünden

Reasoning steps:
Kichi Sipi Bridge >> crosses >>>> Nelson River
What is Nelson River a tributary of? >>>> Hudson's Bay

Answer: spans: Hudson's Bay