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Pick–Sloan Missouri Basin Program
The Pick–Sloan Missouri Basin Program, authorized by the Flood Control Act of 1944, merged the Army's Pick Plan and the Bureau of Reclamation's Sloan Plan for the Missouri River basin.
Pickfair
Pickfair was the Beverly Hills, California estate of Mary Pickford and Douglas Fairbanks, a redesigned hunting lodge said to be the nation's second-most famous residence.
Picture window
A picture window is a large, usually fixed single-pane window with few or no glazing bars, placed to frame an attractive exterior view rather than to open for ventilation.
Pied-à-terre
A pied-à-terre, French for "foot on the ground", is a small apartment kept for short stays in a city far from one's main home, a term used in English since the 1820s.
Piedras Negras, Coahuila
Piedras Negras, also called Ciudad Porfirio Diaz, is a city in Coahuila, Mexico, on the Rio Grande across from Eagle Pass, Texas, founded in 1850.
Piercebridge Roman Bridge
Piercebridge Roman Bridge: remains of a Roman bridge carrying Dere Street over the River Tees at Piercebridge, County Durham/North Yorkshire. Two bridges existed; the stone-piered second, built early 3rd century, was found in 1972 and is a scheduled monument.
Pierre Charles L'Enfant
Pierre Charles L'Enfant, also known as Peter L'Enfant, was a French-born architect and engineer who served in the Continental Army and designed the 1791 plan for Washington, D.C.
Pile driving analyzer
A pile driving analyzer (PDA) measures force and acceleration at a pile head during hammer impact, estimating pile bearing capacity, driving stresses, and hammer performance.
Pile foundation
A pile foundation is a deep foundation that uses long, slender piles to carry structural loads through weak surface soils down to stronger soil or rock.
Pilgrimage Church of St John of Nepomuk at Zelená Hora
Pilgrimage Church of St John of Nepomuk at Zelená Hora (Poutní kostel sv. Jana Nepomuckého na Zelené hoře), a 1719–1722 five-pointed star-shaped Baroque Gothic church by Jan Blažej Santini Aichel near Žďár nad Sázavou, Czech Republic; UNESCO World Heritage Site since 1994, criterion (iv).
Pilot tunnel
A pilot tunnel, also called a pilot drift, is a small tunnel excavated ahead of a larger tunnel to explore ground conditions and assist final excavation.
Pine Flat Dam
Pine Flat Dam is a 429-foot-high concrete gravity dam on the Kings River in Fresno County, California, built by the Army Corps of Engineers and completed in 1954.
Ping An International Finance Centre
Ping An International Finance Centre, also known as Ping An Finance Center (平安金融中心), is a 599-meter, 115-story skyscraper in Shenzhen, headquarters of Ping An Insurance.
Pipe (fluid conveyance)
A pipe is a hollow cylinder, usually rigid, that conveys fluids such as water, gas, sewage, or oil; pipes are sized by nominal diameter, unlike tubes.
Pipe jacking
Pipe jacking is a trenchless construction method in which hydraulic jacks push prefabricated pipes through the ground between shafts, typically for sewers and utility crossings under roads and railways.
Pipe network analysis
Pipe network analysis, also known as pipe networks, calculates flow rates and pressures in interconnected pipe systems; its governing equations are nonlinear and solved iteratively, as in software like EPANET.
Pipeline leak detection
Pipeline leak detection is the set of technologies and methods for establishing whether a pipeline carrying water, oil, or gas is leaking, often locating the leak.
Piping and internal erosion
Piping and internal erosion is the process by which seepage through an embankment dam or levee carries away soil particles, forming erosion channels that can cause breach.
Piping and plumbing fitting
A piping and plumbing fitting, also known as a pipe fitting, is a component that connects, redirects, branches, reduces, or terminates pipe and tubing in fluid systems.
Pisa Cathedral
Pisa Cathedral (Cattedrale di Santa Maria Assunta, or Duomo di Pisa) is the medieval Romanesque cathedral of Pisa, Tuscany, founded in 1063 and consecrated in 1118.
Piston effect
The piston effect is the airflow a moving train forces through a railway tunnel, pushing air ahead of it and drawing air behind; it ventilates subway stations without fans.
Pit-house
A pit-house is a dwelling whose floor is excavated below the ground surface, common in the ancient American Southwest from about 200 BC to AD 700.
Pitt Stadium
Pitt Stadium was the on-campus football stadium of the University of Pittsburgh, home to the Pitt Panthers from 1925 until its demolition after the 1999 season.
PizzaExpress
PizzaExpress is a British casual dining pizza chain founded by Peter Boizot, who opened Britain's first pizzeria chain in Soho, London, in 1965; it now runs over 360 pizzerias.
Plank flooring
Plank flooring is wood flooring made of boards 3 inches wide or wider, giving a more casual look than narrower strip flooring, and also covers vinyl and laminate planks.
Plank house
A plank house is a dwelling of cedar posts, beams, and split planks built by Indigenous peoples of the Pacific Northwest Coast, used as winter homes and meeting houses.
Planning Techniques
Planning techniques: structured methods (MBO, PERT, PPBS, Delphi, scenario construction, comparison matrix, MCA, decision analysis) for setting goals, generating alternatives, and evaluating options in organizations, urban planning, and AI planning.
Plantation complexes in the Southern United States
A plantation complex in the Southern United States was an agricultural estate organized around a single cash crop, worked by enslaved labor before 1865 and tenancy afterward.
Plaster
Plaster, also known as calcined gypsum, is a building material made from lime, gypsum, or cement mixed with water and applied wet to walls and ceilings, hardening in place.
Plastic analysis (structural engineering)
Plastic analysis is a structural engineering method that determines a structure's true collapse load by following its behavior past first yield, through plastic hinge formation, until it becomes a mechanism.