UpdatedThu, Feb 18, 2021 at 2:55 pm ET Replies(4) "We anticipate that blasting operations will continue until late Summer 2021," the city said. (Jenna Fisher/Patch) WALTHAM, MA — On Wednesday, after several people called the city to complain and others took to the internet to ask if others felt an earthquake or possible blasting, the city sent out an alert to remind people that since the middle of January, construction crews have begun blasting at the site of the new Waltham High School. "This is to inform everyone that construction activities have begun on the new Waltham High School at 554 Lexington Street," a reverse 911 call and emergency alert email said. "About a week ago blasting operations were initiated. Generally, there will be two blasts every day, Monday to Friday, between the hours of 11 a.m. and 2 p.m. The exact times are published weekly and posted to the project website."