The Orleans Canal is a drainage canal in New Orleans, Louisiana.
 The canal, along with the 17th Street Canal and the London Avenue Canal, form the New Orleans Outfall Canals.
 The current version of the canal is about 2 km long, running along the up-river side of City Park, through the Lakeview and Lakeshore neighborhood, and into Lake Pontchartrain.
 It is part of the system used to pump rain water out of the streets of the city into the Lake.
 The Canal has also been known as the Orleans Avenue Canal, the Orleans Outfall Canal, the Orleans Tail Race, and early on, the Girod Canal,
The 16th Ward or Sixteenth Ward is a division of the city of New Orleans, Louisiana, one of the 17 Wards of New Orleans.
 New Orleans Districts and Wards.
 It is an Uptown ward, along with the adjacent 17th Ward formerly part of the city of Carrollton, Louisiana, annexed by New Orleans in the 1870s.
 The Ward stretches inland from the Mississippi River, with the upper boundary being Carrollton Avenue, across which is the 17th Ward, and the lower being Lowerline Street, across which is the 14th Ward.
 The back boundary was the New Basin Canal, now part of the route of I-10.
The London Avenue Canal is a drainage canal in New Orleans, Louisiana, used for pumping rain water into Lake Pontchartrain.
 The Canal runs through the 7th Ward of New Orleans from the Gentilly area to the Lakefront.
 It is one of the three main drainage canals responsible for draining rainwater from the main basin of the city of New Orleans.
 The London Avenue Canal's flood walls built atop earthen levees breached on both sides during Hurricane Katrina in 2005.
The Riverside Canal is an irrigation canal in El Paso County beginning southeast of El Paso, Texas.
 The canal acquires water from the Riverside Diversion Dam on the Rio Grande 15 mi southeast of El Paso.
 The canal is managed by the US Bureau of Reclamation.
 The canal extends for 17.2 mi with a capacity of 900 cubic feet per second.
 Water from the canal irrigates about 39,000 acres (160 km²).
 The canal and diversion dam is the southernmost system on an irrigation project extending along the Rio Grande in New Mexico and Texas.
 The canal supplies a canal network extending throughout the Upper Rio Grande Valley.
Lake Terrace/Lake Oaks is a neighborhood of the city of New Orleans, Louisiana.
 A sub-district of the city's Gentilly District, its boundaries as defined by the City Planning Commission are: Lake Pontchartrain to the north; the Industrial Canal to the east; Leon C. Simon Drive, Elysian Fields Avenue, New York Street, the London Avenue Canal, and Robert E. Lee Boulevard to the south; and Bayou St. John to the west.
 The neighborhood comprises the Lake Terrace and Lake Oaks subdivisions, the principal campus of the University of New Orleans, and the University of New Orleans Research & Technology Park — all built on land reclaimed from Lake Pontchartrain.
St. Anthony is a neighborhood of the city of New Orleans.
 A subdistrict of the Gentilly District Area, its boundaries as defined by the City Planning Commission are: New York Street to the north, Elysian Fields Avenue to the east, Mirabeau Avenue to the south and the London Avenue Canal to the west.
Dillard is a neighborhood of the city of New Orleans.
 A subdistrict of the Gentilly District Area, its boundaries as defined by the City Planning Commission are: Mirabeau Avenue to the north, Elysian Fields Avenue to the east, Benefit Street and I-610 to the south and Paris Avenue, Pratt Drive and the London Avenue Canal to the west.
There are three outfall canals in New Orleans, Louisiana – the 17th Street, Orleans Avenue and London Avenue canals.
 These canals are a critical element of New Orleans’ flood control system, serving as drainage conduits for much of the city.
 There are 13 mi of levees and floodwalls that line the sides of the canals.
 The 17th Street Canal is the largest and most important drainage canal and is capable of conveying more water than the Orleans Avenue and London Avenue Canals combined.
The 17th Street Canal is the largest and most important drainage canal in the city of New Orleans.
 Operating with Pump Station 6, It moves water into Lake Pontchartrain.
 The canal, along with the Orleans Canal and the London Avenue Canal, form the New Orleans Outfall Canals.
 The 17th Street Canal forms a significant portion of the boundary between the city of New Orleans and Metairie, Louisiana.
 The canal has also been known as the Metairie Outlet Canal and the Upperline Canal.
Filmore is a neighborhood of the city of New Orleans.
 A subdistrict of the Gentilly District Area, its boundaries as defined by the City Planning Commission are: Robert E. Lee Boulevard to the north, London Avenue Canal to the east, Press Drive, Paris Avenue and Harrison Avenue to the south and Bayou St. John to the west.

Question: Does the London Avenue Canal or  Riverside Canal run through the 4th ward?
Answer: London Avenue Canal