2,617 articles
New York State Canal System
The New York State Canal System is a 524-mile network of four canals, including the Erie Canal, operated by the New York State Canal Corporation.
New York–Pennsylvania Joint Interstate Bridge Commission
The New York–Pennsylvania Joint Interstate Bridge Commission is an interstate agency that owns and maintains the ten free bridges over the Delaware River between New York and Pennsylvania.
NEWater
NEWater is Singapore's brand of high-grade reclaimed water produced by PUB through a three-stage purification process, introduced in 2002 and meeting about 40% of Singapore's water demand.
Newmark's sliding block method
Newmark's sliding block method is a geotechnical procedure proposed by Nathan M. Newmark in 1965 for estimating the permanent displacement of slopes and embankments during earthquake shaking.
Newport Transporter Bridge
The Newport Transporter Bridge is a transporter bridge carrying vehicles and pedestrians by gondola across the River Usk in Newport, Wales, opened in 1906 and the largest surviving example.
Nezahualcoyotl's dike
Nezahualcoyotl's dike, the albarradón of Nezahualcóyotl, was a roughly 16-kilometer barrier built across Lake Texcoco around 1449–1450 by Nezahualcóyotl, ruler of Texcoco, to protect Tenochtitlan from flooding.
NIA Valencia
NIA Valencia: the NIA Bukidnon Irrigation Management Office in Bagontaas, Valencia City, Bukidnon, Philippines, managing the Pulangui River Irrigation System and recent canal and flume construction projects.
Niagara Falls Bridge Commission
The Niagara Falls Bridge Commission is a bi-national agency operating the three international bridges over the Niagara River between Ontario and New York, created in 1938.
Niagara Falls Suspension Bridge
The Niagara Falls Suspension Bridge, also called the International Suspension Bridge, was designed by John A. Roebling and completed in 1855 as the world's first working railway suspension bridge.
Nibutani Dam
Nibutani Dam (二風谷ダム) is a dam on the Saru River in Biratori, Hokkaido, Japan, built on expropriated Ainu land and known for the 1997 Nibutani Dam Decision.
Nicaraguan Canal and Development Project
The Nicaraguan Canal and Development Project was a proposed 275.5 km ship canal across Nicaragua linking the Pacific and Caribbean, granted in 2013 and canceled in 2024.
Nicoll Highway collapse
The Nicoll Highway collapse was a 2004 construction accident in Singapore in which a subway excavation failure brought down part of the highway, killing four workers.
Nicosia Aqueduct
The Nicosia Aqueduct, also called the Silahtar Aqueduct, was an Ottoman conduit that carried water from the mountains north of Nicosia into the walled city, supplying street fountains.
Night soil
Night soil is human excreta collected from privies and dry toilets, historically valued as fertilizer, with an organized urban collection trade dating back to Song dynasty China.
Nîmes aqueduct
Nîmes aqueduct (aqueduc de Nîmes): Roman gravity aqueduct of about 50 km from the Eure spring at Uzès to Nemausus (Nîmes), built 40–60 AD, famous for the Pont du Gard bridge, in service nearly five centuries.
Nominal Pipe Size
Nominal Pipe Size, also known as nominal bore, is a North American standard for naming pipe sizes, where each size is a name rather than an actual measurement.
Non-revenue water
Non-revenue water, formerly called unaccounted-for water, is water a utility puts into its distribution system but does not bill to customers, lost through leakage, illegal connections, and metering inaccuracies.
Nonpoint source pollution
Nonpoint source pollution is water pollution from diffuse runoff of rainfall or snowmelt over land, rather than from a pipe, and it pollutes most impaired US waters.
Noordoostpolder
The Noordoostpolder, or Northeast Polder, is a polder in the Dutch province of Flevoland reclaimed from the Zuiderzee between 1936 and 1942 as part of the Zuiderzee Works.
Noordwaard Polder depoldering
The Noordwaard Polder depoldering (ontpoldering Noordwaard) is a Dutch flood-risk project completed in 2015, which reopened about half of a 4,450-hectare polder near Werkendam to the Nieuwe Merwede river.
Norfolk Southern–Gregson Street Overpass
The Norfolk Southern–Gregson Street Overpass, nicknamed the "Can Opener" and "11foot8 bridge," is a low railroad trestle in Durham, North Carolina, known for crashing into tall trucks.
Norman Medal
The Norman Medal is an annual award of the American Society of Civil Engineers for an original paper, instituted in 1872 with an endowment by George H. Norman.
Normandy Bridge
The Normandy Bridge (Pont de Normandie) is a cable-stayed road bridge across the Seine estuary between Le Havre and Honfleur, France, opened in 1995 with a record 856 m main span.
Norris Dam
Norris Dam is a hydroelectric and flood-control dam on the Clinch River in Tennessee, the first major Tennessee Valley Authority project, begun in 1933 and completed in 1936.
North Crimean Canal
The North Crimean Canal (Північно-Кримський канал) carries Dnieper water from the Kakhovka Reservoir into arid northern Crimea. Its 403 km main branch is Europe's longest canal.
North Jetty
North Jetty is the shared name for the northern jetty at paired harbor-entrance jetties, notably Grays Harbor (1916), Humboldt Bay (1891-1925, dolos-armored), and the Mouth of the Columbia River; several are famous surf breaks.
North Sea Canal
The North Sea Canal (Dutch: Noordzeekanaal) is a 21-kilometer ship canal connecting the port of Amsterdam directly to the North Sea at IJmuiden, opened in 1876.
North West Water
North West Water was the water and sewerage utility for North West England, created in 1974 as a regional water authority, privatized in 1989, and renamed United Utilities in 1996.
Northern Heavy Industries Group
Northern Heavy Industries Group is a Chinese heavy machinery manufacturer based in Shenyang, formed in 2006, that makes tunnel boring machines from 3 to 15 meters in diameter.
Northern Metropolis
The Northern Metropolis (北部都会区) is a planned 300-square-kilometer development area in Hong Kong's northern New Territories, announced by Carrie Lam in 2021 and built around innovation and technology with neighboring Shenzhen.