2,617 articles
Sonestown Covered Bridge
Sonestown Covered Bridge, also called Davidson Covered Bridge (PA/38-57-03), is an 110-foot Burr arch truss bridge built c. 1850 by Sadler Rogers over Muncy Creek in Davidson Township, Sullivan County, Pennsylvania; National Register listed 1980, NRIS 80003640.
Soo Locks
The Soo Locks, also called the St. Mary's Falls Ship Canal, are navigation locks at Sault Ste. Marie, Michigan, that lift ships between Lake Superior and Lake Huron.
Sorek Desalination Plant
The Sorek Desalination Plant is a seawater reverse-osmosis plant on Israel's Mediterranean coast near Tel Aviv, producing 624,000 m³ of drinking water daily, about 20% of Israel's municipal water demand.
South Bridge
South Bridge, also called Crowthorpe Bridge, is an 18th-century seven-arch limestone bridge over the River Nene between Oundle and Barnwell, Northamptonshire; a scheduled monument (NHLE 1003627) and Grade II listed building, distinct from Edinburgh's South Bridge.
South–North Water Transfer Project
The South–North Water Transfer Project, also called the South-to-North Water Diversion Project (南水北调), is the world's largest scheme moving Yangtze water to China's dry north, operating since 2014.
Southeastern Anatolia Project
The Southeastern Anatolia Project (Turkish: Güneydoğu Anadolu Projesi, GAP) is Turkey's regional development program for the Euphrates and Tigris basins, begun in the 1970s and built around 22 dams and large-scale irrigation.
Southern Crossing (San Francisco Bay)
The Southern Crossing is a proposed automobile bridge across San Francisco Bay south of the Bay Bridge, first planned in 1946, proposed over a dozen times, and never built.
Southwark and Vauxhall Waterworks Company
The Southwark and Vauxhall Waterworks Company, formally the Southwark and Vauxhall Water Company, was a private London water supplier formed by an 1845 merger, remembered for John Snow's 1854 cholera investigation.
Soyang Dam (소양강댐)
Soyang Dam (소양강댐), also known as Soyanggang Dam, is South Korea's largest dam, a 123 m rockfill dam on the Soyang River completed in 1973 that supplies much of the Seoul capital region's water.
SP 63.13330
SP 63.13330 (СП 63.13330.2018), "Concrete and Reinforced Concrete Structures. General Provisions," is the Russian national design code for concrete structures, in force since June 2019.
Spanish early-modern municipal aqueducts
Spanish early-modern municipal aqueducts were gravity-fed water-supply systems built from the sixteenth century, including Teruel's Los Arcos, Plasencia's San Antón, and Madrid's viajes de agua.
Special moment-resisting frame
A special moment-resisting frame, or SMF, is a highly ductile seismic force-resisting system of rigidly joined beams and columns, permitted in high seismic design categories.
Specific energy (open-channel flow)
Specific energy in open-channel flow is the energy of flowing water per unit weight relative to the channel bottom, equal to depth plus velocity head, and it classifies flow as subcritical, critical, or supercritical.
Spectral acceleration
Spectral acceleration is an earthquake engineering measure of the maximum acceleration a damped oscillator with a given natural period experiences in ground motion, approximating what a building experiences.
Spencer's method
Spencer's method, published by E. Spencer in Géotechnique in 1967, is a limit equilibrium method of slices for computing a slope's factor of safety against failure.
Spillway
A spillway, or overflow channel, is a structure at or beside a dam that releases excess reservoir water so the dam is never overtopped and eroded.
Spillway bridge
A spillway bridge is a bridge deck carried on or across a dam spillway crest or gate structure, providing roadway access, gate-hoist support, and operator access over the flow surface.
Spillway hydraulics and safety
Spillway hydraulics and safety is the engineering analysis of whether a dam's spillway and outlet works can pass extreme floods without overtopping the dam or failing.
Sponge city
A sponge city is an urban development model where buildings, roads, and green space absorb, store, and slowly release rainwater, best known as China's national stormwater program begun in 2015.
Squat toilet
A squat toilet, also called a Turkish or Indian toilet, is a toilet used in a squatting posture, common across much of Asia, Africa, and the Middle East.
Srisailam Dam
Srisailam Dam, officially the Neelam Sanjeeva Reddy Srisailam Project, is a gravity dam on the Krishna River on the Telangana–Andhra Pradesh border, completed in 1984 and home to India's second largest working hydroelectric station.
St-Sylvestre
St-Sylvestre (Pleiades 167906) is the gazetteer entry for the Pont Romain, an arched stone bridge over the Duzon at Saint-Sylvestre, Ardeche, France; Roman or medieval in date, 13 m arch, Barrington Atlas 17 D4.
St. Francis Dam
The St. Francis Dam was a concrete dam near Los Angeles that collapsed in 1928, killing more than 450 people in the second deadliest US dam failure.
Stad Ship Tunnel
The Stad Ship Tunnel (Stad skipstunnel) is a planned 1,700-meter ship tunnel through Norway's Stad Peninsula, approved in 2021 as the world's first full-scale ship tunnel.
Stadtbahn
Stadtbahn (German for "city railway") is urban rail transit in German-speaking countries, developed from tramways, with vehicles running in tunnels downtown and on street or regional tracks outside it.
Staircase lock
A staircase lock is a set of canal locks built directly on top of one another, sharing gates so no pound separates them, allowing much steeper flights of locks.
Stal̕əw̓asəm Bridge
The Stal̕əw̓asəm Bridge, also called the Riverview Bridge, is a four-lane, toll-free cable-stayed bridge over the Fraser River between Surrey and New Westminster, British Columbia, opened in 2026.
Standard step method
The standard step method is an iterative procedure that solves the one-dimensional energy equation step by step between cross sections to compute water surface profiles in open channels.
Standedge Tunnels
The Standedge Tunnels are four parallel tunnels beneath the Pennines between Marsden and Diggle, England, including the canal tunnel on the Huddersfield Narrow Canal, opened in 1811 and the longest in Britain.
Stari Most
Stari Most, also known as the Old Bridge of Mostar, is a rebuilt 16th-century Ottoman arch bridge in Mostar, Bosnia and Herzegovina, destroyed in 1993 and reconstructed in 2004.