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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The HDD construction method is used to install pipelines beneath obstacles-such as stream crossings, lakes, coastal bluffs and road or railroad crossings where conventional open trench pipe construction techniques would cause unacceptable environmental disturbance or resource impacts. Using the continuous bore hole method, a HDD tunnels beneath surface obstacles and then pulls pipeline back through the underground tunnel, leaving the surface undisturbed. The HDD installation involves four main steps : pre-site planning, drilling the pilot hole, expanding pilot hole by reaming, and pullback of a pre-fabricated steel pipe string.  3, record 1, English, - horizontal%20directional%20drilling

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Le forage directionnel horizontal est une technique de construction pour l'installation de conduites ou de câbles de petites dimensions ne nécessitant pas le creusage de tranchées. Elle s'est développée à partir des technologies de forage vertical principalement utilisées en industrie pétrolière.  4, record 1, French, - forage%20directionnel%20horizontal

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A pipeline laid either on the bed or bottom or in an open or covered trench under the bed of a stream or other body of surface water.  2, record 2, English, - submerged%20pipe

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Tuyau posé sur le lit d'un cours d'eau ou dans une tranchée creusée dans ce lit.  1, record 2, French, - tuyau%20immerg%C3%A9

Record 2,  Textual support,  Spanish