16/06/2026
๐ฆ๐ฎ๐ณ๐ฒ๐น๐ ๐ถ๐ป๐๐๐ฎ๐น๐น๐ถ๐ป๐ด ๐๐ฎ๐๐ฒ๐ฟ ๐บ๐ฎ๐ถ๐ป๐ ๐ฏ๐ฒ๐น๐ผ๐ ๐ฎ ๐ฏ๐๐๐ ๐บ๐ผ๐๐ผ๐ฟ๐๐ฎ๐ ๐๐ถ๐๐ต ๐๐ฟ๐ถ๐น๐น๐ด๐๐ถ๐ฑ๐ฒ ๐๐ฆ๐ง
In October 2025, Brownline UK surveyed these parallel HDD crossings in Wales, under the M4 near Newport. Contractor Gmac Utilities Ltd installed two water mains below the motorway. ๐ฃ๏ธ
A mud motor was used to drill through the hard layers of mudstone. Brownline UK provided real-time positional measurements and steering advice using the Drillguide Gyro Steering Tool. ๐ฏ
Considering the significant elevation changes of the bore and the crucial motorway crossing, fluid pressure management was key. With Brownline's Pressure-While-Drilling service, the downhole pressure was monitored and the risk of blow-outs was strongly reduced. ๐ก๏ธ
Read more about this project on our website: https://drillguide.com/projects/two-motorway-crossings-in-wales-safely-installing-water-mains-below-the-m4
๐ Location: Newport, Wales, United Kingdom ๐ด๓ ง๓ ข๓ ท๓ ฌ๓ ณ๓ ฟ๐ฌ๐ง
๐ Length: 405 m / 1329 ft
โญ Pipe: 20โ HDPE water
๐ Angles: -15ยฐ entry, 15ยฐ exit
๐ Key challenges: motorway crossing, elevation change, hard soil
๐งญ Guidance: Drillguide Gyro Steering Tool & GPS track
๐ท Photos by Gmac Utilities Ltd