shaft for utilities
1tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
2Mass production — This article is about large scale production. For the Iggy Pop piece, see The Idiot (album). For the American funk band, see Mass Production (band). Mass production (also flow production, repetitive flow production, series production, or serial… …
3Compressed-air energy storage — (CAES) refers to the compression of airto be used later as energy source. At utility scale, it can be stored during periods of low energy demand (off peak), for use in meeting periods of higher demand (peak load). Alternatively it can be used to… …
4Compressed air energy storage — Conceptual representation of the compressed air energy storage concept. Off peak (low cost) electrical power compresses air into an underground air storage “vessel” (the Norton mine), and later the air feeds a gas fired turbine generator complex… …
5Design assist — is the procurement method by which, prior to completion of design, a construction contract may be awarded on a best value basis pursuant to which a contractor provides design assistance to the architect or engineer of record through a design… …
6Roof and tunnel hacking — is the unauthorized (generally prohibited and often illegal) exploration of roof and utility tunnel spaces. The term carries a strong collegiate connotation, stemming from its use at MIT, where the practice has a long history (see vadding). It is …
7Tunnel — This article is about underground passages. For other uses, see Tunnel (disambiguation). Underground tunnel for heatpipes between Rigshospitalet and Amagerværket in Denmark …
8Chicago Tunnel Company — Under the streets of Chicago, pre 1906. Locale Illinois Dates of operation 1906–1959 T …
9Michels Corporation — is an international utility, engineering, design and construction contractor based in Brownsville, Wisconsin. With more than 4,500 employees in its 15 divisions and subsidiaries, Michels is the largest construction company in Wisconsin. It… …
10turbine — /terr bin, buyn/, n. any of various machines having a rotor, usually with vanes or blades, driven by the pressure, momentum, or reactive thrust of a moving fluid, as steam, water, hot gases, or air, either occurring in the form of free jets or as …
