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TYPICAL SUBSURFACE FACILITIES
<br /> Source: U.S. Department of Transportation, FHA Hghtvay/Utility Guide, June 1993.
<br /> Typical Typical
<br /> Item Dimension Typical Materials Cover Typical Locations Other Clues
<br /> Water Mains 100 to 1200 rnm Steel,cast iron,plastic 3.0 m Under street.and sidewalks Manholes,shut-off valve plates,hydrants,knowledge that
<br /> 0 to 48 in.) wood,concrete,asbestos, Ito 10 fl) buildings use piped-in water,water company records
<br /> cement,stone work
<br /> Water 12 to 150 mm Steel,cast iron,plastic, 2.4 m(to 8 ft) From streets toward Shut-off valve plates,knowledge that buildings use piped-in
<br /> Distribution (0.5 lip 6 in.) asbestos,.cement.copper twril.hngs water
<br /> .rues
<br /> lies Mains 50 to 750 mm Steel,cast iron,plastic 1.8 m(to 6 ft) I In der streets and sidewalks Manholes,shut-of valve plates,knowledge that buildings
<br /> (2 to 30 in.) use piped-in gas,gas company records
<br /> Gas 12 to 150 mm Steel,cast iron,plastic, 1.5 to(to 5 ft) From streets toward Shut-off valve plates,knowledge that buildings use piped-in
<br /> Distribution (0.5 to 6 in.) copper buildings gas,visible service entrance or meter,gas company records
<br /> Linea
<br /> Sewer Mains 150 to 1200 mm Cast iron,vitrified clay, 6.1 in Under streets and sidewalks Manholes and cleanout openings,knowledge that buildings
<br /> (6 to 48 in.) asbestos cement,plastic (to 20 ft) and along property lines are served by sewers,lift stations,municipal records
<br /> coated steel,bituminixed
<br /> fibre,concrete,stone work
<br /> Sewer Linea 75 to 150 mm Cast iron,vitrified clay, 1.8 m(to 6 ft) From buildings toward Clcanouts,traps,knowledge that buildings are served
<br /> 0 to 6 in.) asbestos cement,plastic mains by sewer
<br /> coated steel,bimminucd
<br /> Fibre,concrete
<br /> Electric Conduit: Conduit: asbestos cement, 1.5 m(to 5 ft) Under streets and sidewalks Manholes,transformers.visible connections to
<br /> Power 25 to 125 mm steel,concrete,plastic and along property lines aerial plant,electric company records
<br /> Lines in (1 to 5 in.) Cable: insulated copper or
<br /> Conduit Cable: aluminum
<br /> 25 to 50 mm
<br /> (1 to 2 in.)
<br /> Buried 12 to 50 mm Insulated copper or aluminum 13.1 to Along streets,under Visible connections to poles,to buildings,to underground
<br /> Power Lines (0.5 to 2 in.) (to 4.fill sidewalks,along property transformers,electric company records
<br /> lines,toward buildings
<br /> Telephone Conduit: Conduit: plastic,clay, 3.6 m Under streets and sidewalks. Manholes,visible connections to aerial plant.
<br /> Cable in 90 to 125 mm(3.5 to asbestos,cement,steel, (to 12 ft) along property lines telephone company records
<br /> 0-nduil 5 in.,commonly 4 in.) concrete,wood
<br /> 100 mm,Cable: 1010 Cable: insola(cd copper or
<br /> 100 mm(0.3 u)4 in.) aluminum,lead sheath,coaxial
<br /> Iluned 12 to I mm Insulated copper ar 1.2 m(to 4 fl) Along streets and roads. Pedestals,closures,visible connections to aerial plant,
<br /> 'telephone (0.5 to 4 in.) aluminum,coax along rights-of-way telephone company records
<br /> Cahlc
<br /> Buried 10 nun(0.3 in.) Insulated copper,or 0.6 in(to 2 ft) Between buildings and Pedestals,service entrances on buildings,telephone company
<br /> Wire aluminum cables records
<br /> table TV Cable 1.3 cm(0.5 in.) Insulated copper,or 0.5 m(to 2 ft) Between buildings and Service entrance on buildings,visible connection to
<br /> aluminrun cables distribution,cable TV company records
<br /> Source: APWA Subsurface Utility Facilities Detection Techniques and Detection Devices.
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