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Utility tunnels are also often common on large industrial, institutional, or commercial sites, where multiple large-scale services infrastructure (gas, water, power, heat, steam, compressed air, telecommunications cable, etc.) are distributed around the site to multiple buildings, without impeding
847:
has near-perfect surfaces on its footways, cycleways, and streets, with virtually no visible repairs or disturbances. This is achieved by an absence of vehicles on footways or cycleways, and utility ducts that make it is unnecessary to disturb the surfaces in order to access the networks. Utility
510:, Nunavut. Not all older homes are connected, and these must rely on trucks to deliver water and remove sewage. Most homes in rural Alaska (off the road system) are not equipped with plumbing and require fresh water and waste to be transported by personal vehicle such as
244:
vehicular or pedestrian traffic above ground. Due to the nature of these services, they may require regular inspection, repair, maintenance, or replacement, and therefore accessible utility tunnels are preferred instead of direct burying of the services in the ground.
603:
and repair, compared to separate cable ducts for each service. When they are well mapped, they also allow rapid access to all utilities without having to dig access trenches or resort to confused and often inaccurate utility maps.
321:
Utility tunnels are often installed in large industrial plants, as well as large institutions, such as universities, hospitals, research labs, and other facilities managed in common. Shared facilities, such as
409:. The utilidors are a part of Disney's "backstage" (behind-the-scenes) area. They allow Disney employees ("cast members") to perform park support operations, such as trash removal, out of the sight of guests.
521:
Utilidors may also be used to carry fuel lines, such as natural gas. They are not normally used to carry wiring for electric, telephone, and television service, which are usually suspended from poles.
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Utility tunnels range in size from just large enough to accommodate the utility being carried, to very large tunnels that can also accommodate human and even vehicular traffic.
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345:, have installed extensive underground utility tunnels, to allow installation and maintenance of utility lines and equipment without disrupting the historic streets above.
494:) is built on rock, making excavation costly. The utilidor in the foreground carries municipal sewer and water services and protects piping from freezing in the winter.
1020:
946:
1244:
240:). Tunnels are also built to avoid the disruption caused by recurring construction, repair and upgrading of cables and pipes in direct burial trenches.
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for electrical, communication and HVAC lines. The tunnels lie approximately forty feet below the street surface and run under all streets in the
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The following table compares the features of utility networks in single purpose buried trenches vs. the features of common ducts or tunnels:
331:
988:
973:
398:
1179:
582:
470:
308:
119:
909:
1279:
773:
country. Their use, however, is not limited to that country, and there are many examples of such utility tunnels. These include:
556:
444:
282:
53:
1200:
874:
560:
448:
286:
100:
57:
498:
Utilidors are above-ground enclosed utility conduits that are used in larger communities in the northern polar region where
72:
1031:
600:
1110:
782:
612:
406:
79:
334:, many of the buildings are connected via large underground passages to allow easy movement of people and equipment.
502:
does not allow the normal practice of burying water and sewer pipes underground. They can in particular be found in
1075:
underlying the city. At right foreground is a portion of the utilidor crossing Okpik Street overhead, adjacent to
86:
545:
433:
271:
564:
549:
452:
437:
390:
367:
290:
275:
46:
68:
808:
361:
141:
769:, where government officials have sought ways to reduce the catastrophic effects of earthquakes in their
1090:
852:
1068:
394:
953:
916:
812:
515:
201:
1076:
1238:
1133:
881:
830:
778:
374:
349:
327:
220:, where the frost line is often more than 18 ft (5.5 m) below the surface, which is
1274:
1100:
938:
930:
838:
624:
491:
323:
169:
161:
93:
160:
is a passage built underground or above ground to carry utility lines such as electricity,
1183:
1176:
844:
802:
770:
848:
networks are housed in a cluster of pipes which are located under footways and cycleways.
728:
Shared initial capital costs between infrastructure providers (ie, water, gas, electric)
967:
Red arrow marks a prefabricated element of a utility tunnel already placed in the trench
877:
in New
Kowloon, Hong Kong, a disused railway tunnel which now carries a towngas pipeline
1164:
1129:
789:
342:
615:, whether in common or separate channels, prevent downed utility cables from blocking
1268:
1105:
980:
785:
608:
378:
680:
Less roadworks and traffic as maintenance can be done without disruption of traffic
856:
816:
796:
229:
165:
132:
1152:
1049:
934:
891:
834:
534:
422:
330:
pipes routed through utility tunnels. On some university campuses, such as the
260:
225:
35:
17:
212:
Utility tunnels are common in very cold climates where direct burial below the
1072:
628:
511:
499:
402:
370:
233:
221:
213:
731:
Risk of damage to co-located infrastructure (eg: pipes, wiring & cables)
1046:
887:
822:
632:
620:
487:
483:
173:
811:'s abandoned network of tunnels are leased to utility companies for use as
715:
Roads constantly need to be excavated for repair of various utilities.
636:
596:
507:
382:
704:
Easy access for maintenance, upgrades and expansion of infrastructure
1095:
1027:
995:
870:, 15 km north of Doha, is approximately 14–15 km in length.
867:
826:
503:
338:
217:
164:, water supply pipes, and sewer pipes. Communications utilities like
137:
176:
cables are also sometimes carried. One may also be referred to as a
595:
The advantages of utility tunnels are the reduction of maintenance
1053:
895:
863:
766:
659:
Cheaper initial capital cost of burying individual infrastructure
482:
386:
385:. Smaller utilidor systems are built under the central section of
237:
131:
688:
Reduced manholes on roads. Single manhole for all infrastructure
616:
736:
Reduced impact from outages due to increased maintenance speed
528:
416:
254:
29:
699:
Hard to coordinate projects between infrastructure providers
352:, who enjoy investigating hidden complex networks of spaces.
819:, except where they were displaced by rapid transit tunnels.
691:
Large numbers of manholes for various infrastructure types
366:
Some of the largest and most famous utility tunnels are at
743:
The low thermal conductivity of air in tunnels allows heat
745:
transmission with less insulation and cheaper standoffs.
656:
Higher initial capital cost for construction of tunnels
518:. Villages with utilidors are considered more advanced.
1258:"Gujarat International Finance Tec-city: A Smart GIFT"
251:
Industrial, institutional, and municipal environments
228:
is too high to bury water and sewer mains, and where
696:
Easy to coordinate between different infrastructure
192:
Smaller cable containment is often referred to as a
60:. Unsourced material may be challenged and removed.
855:allows high voltage electricity line to cross the
232:would be too unsightly or pose a danger (like in
1155:. MMA Group. 2006. Retrieved November 30, 2014.
1010:Utility passageway between two buildings of a
765:Many examples of utility tunnels are found in
8:
204:is a major alternative to ducts or tunnels.
563:. Unsourced material may be challenged and
451:. Unsourced material may be challenged and
289:. Unsourced material may be challenged and
224:). They are also built in places where the
1167:. Big Empire. Retrieved November 30, 2014.
1130:"National Grid - Overview - Why a tunnel?"
525:Comparison with direct burial of utilities
1196:"Prince Charles–not your typical radical"
583:Learn how and when to remove this message
471:Learn how and when to remove this message
309:Learn how and when to remove this message
120:Learn how and when to remove this message
707:Huge labour costs for regular re-burial
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1243:: CS1 maint: archived copy as title (
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1153:"Infrastructures: Common Utility Duct"
1012:Ballistic Missile Early Warning System
667:Difficult location of infrastructure
332:Massachusetts Institute of Technology
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795:Azabu-Hibiya Common Utility Duct in
752:Reduced excavation and labour costs
561:adding citations to reliable sources
449:adding citations to reliable sources
287:adding citations to reliable sources
58:adding citations to reliable sources
841:, incorporates common utility ducts
389:'s Future World, primarily beneath
607:One of the greatest advantages is
405:also has a small utilidor through
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720:Reduced future maintenance costs
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45:needs additional citations for
801:Minatomirai District lines in
27:Passage carrying utility lines
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1067:A utilidor system is used in
1032:Northwest Territories, Canada
998:is shared by pipes and cables
723:Increased risk of disruption
337:Some municipalities, such as
1194:Mitchell, Sandy (May 2006).
1111:Wayfinding (urban or indoor)
712:Easy access for maintenance
506:, Northwest Territories and
373:. They were first built for
348:Utility tunnels may attract
216:is not feasible (such as in
952:District heating tunnel in
833:built on land belonging to
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817:central business district
915:Stark utility tunnel in
144:for maintenance vehicles
1280:Subterranea (geography)
1178:. The Landmark Tower.
862:The Utility Tunnels in
136:This utility tunnel in
809:Chicago Tunnel Company
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362:Disney utilidor system
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1182:July 4, 2009, at the
1091:Dartford Cable Tunnel
853:Dartford Cable Tunnel
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813:common utility ducts
557:improve this section
445:improve this section
356:At Walt Disney World
283:improve this section
54:improve this article
1201:National Geographic
1165:"Tokyo Underground"
954:Copenhagen, Denmark
933:tunnel beneath the
917:Zurich, Switzerland
771:tectonically active
202:Direct-buried cable
198:underground conduit
1077:Barrow High School
1045:Utility Tunnel in
886:Utility Tunnel in
875:Beacon Hill Tunnel
777:Incorporated with
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397:, and formerly at
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1134:National Grid plc
1071:due to extensive
1069:Utqiaġvik, Alaska
882:Hongkong Electric
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625:natural disasters
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375:Walt Disney World
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399:Pleasure Island
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360:Main article:
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343:Czech Republic
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573:November 2014
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542:This section
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461:November 2014
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430:This section
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379:Magic Kingdom
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65:Find sources:
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43:This article
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1253:
1228:. Retrieved
1221:the original
1208:
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1137:. Retrieved
1124:
857:River Thames
835:King Charles
797:Tokyo, Japan
781:and Sonshan
764:
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606:
594:
579:
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555:Please help
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443:Please help
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413:Arctic towns
407:Tomorrowland
395:Innoventions
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281:Please help
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166:fiber optics
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52:Please help
47:verification
44:
1050:Gandhinagar
935:Rhein River
892:Gandhinagar
880:Tunnels of
629:earthquakes
613:power lines
371:theme parks
226:water table
1269:Categories
1230:2013-10-17
1139:2013-03-30
1117:References
1073:permafrost
994:Tunnel in
633:hurricanes
601:excavation
512:snowmobile
500:permafrost
403:Disneyland
234:earthquake
214:frost line
194:cable duct
80:newspapers
1047:GIFT City
888:GIFT City
823:Poundbury
788:lines in
621:emergency
544:does not
488:Flin Flon
432:does not
270:does not
174:telephone
1239:cite web
1180:Archived
1085:See also
873:The old
761:Examples
637:tsunamis
627:such as
597:manholes
158:utilidor
1275:Tunnels
902:Gallery
565:removed
550:sources
508:Iqaluit
453:removed
438:sources
383:Florida
341:in the
291:removed
276:sources
94:scholar
1096:Tunnel
1028:Inuvik
996:Prague
868:Lusail
827:Dorset
635:, and
504:Inuvik
368:Disney
339:Prague
326:, use
236:prone
218:Alaska
172:, and
138:Prague
96:
89:
82:
75:
67:
1224:(PDF)
1217:(PDF)
1054:India
896:India
864:Qatar
779:Xinyi
767:Japan
617:roads
387:Epcot
238:Tokyo
208:Usage
188:, or
162:steam
156:, or
101:JSTOR
87:books
1245:link
851:The
548:any
546:cite
490:(in
436:any
434:cite
393:and
274:any
272:cite
73:news
937:in
837:as
825:in
783:MRT
559:by
514:or
447:by
381:in
377:'s
285:by
196:or
56:by
1271::
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1237:{{
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98:·
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