The phrase "a section of the underground" is correct and usable in written English.
It can be used to refer to a specific part of an underground area, such as a subway system, tunnels, or any subterranean space.
Example: "The city plans to expand a section of the underground to improve transportation efficiency."
Alternatives: "a part of the underground" or "a segment of the underground".
Plainview's ground water makes up a section of the larger underground aquifer, but its contamination has not yet spread.
In 2012, the transport minister approved tunnelling underground a section of the A10 ring road that bisects Zuidas and there are also plans to enlarge and improve the Amsterdam Zuid train station, both to begin construction by 2015.
The others are "planned engineer works" — since, unlike New York, there is only one track and not an express and local track, whenever a Tube line needs repairs, which is all the time on London's antediluvian system, the Underground simply closes a section of the line.
Six coal miners at Crandall Canyon were trapped underground when a section of the mine they were working in collapsed.
Rescuers saved Matt Benson from an underground tunnel after a section of the ceiling caved in.Girl power The jury for the prestigious annual Turner Prize for contemporary art announced an all-female shortlist of four.Haunted honeymoon A Lancashire couple had to spend their wedding night in a cell after police stopped a brawl at their wedding reception.
I just visited the Paris Sewer Museum, where you get to go underground to check out a section of the Paris sewer firsthand.
An extensive search of a disused underground car park in Marton Road began earlier, with officers and firefighters forcing their way into a section of the structure.
Given clearance by federal regulators, engineers began pumping diesel fuel today into a section of an underground pipeline that leaked in June 1999, causing a large explosion that killed three young people in Bellingham, Wash.
Later, a couple of Maquis are caught with forged ration cards, tortured, and eventually freed by the resistance forces.Although the producers undoubtedly meant to portray a cross-section of the underground's great work very little of that noble effort is projected.
In fact, they were the point people in Albany's section of the Underground Railroad and heavily involved in the movement across the state.
