A contractor of Purple Line Transit Partners used explosives to blast through rock this week, for the first time in the Purple Line project, to build a tunnel in Silver Spring, a spokesperson said.
John Undeland, spokesperson for Purple Line Transit Partners, which is building the Purple Line, said the contractor has blasted through rock as part of building an underground tunnel in Silver Spring Tuesday. People on Arliss Road and Flower Road in Silver Spring may have felt a slight vibration. There were three test explosions Tuesday afternoon and one for blasting through rock done later that evening, Undeland said.
“This all along has been a potential that there would be blasting, and now we’ve come across conditions that would require it,” said Undeland.
Undeland added that 24 hours’ notice will be given prior to blasting.
Contractors brought explosives onsite on Tuesday, and then removed any unused explosives from the site at the end of the day.
The Purple Line is a 16-mile, light-rail transit line that will connect Montgomery and Prince George’s Counties, starting at Bethesda Station and ending at New Carrollton Station. The Maryland Transit Administration selected Purple Line Transit Partners to construct the Purple Line as part of a public-private partnership (P3).