Workforce returning to Line 3 project after spring break Because of seasonal construction restrictions, the number of workers on Enbridge's Line 3 replacement project was reduced to about 900. Crews are coming back now with the hiatus over with the number of workers to reach 4,000 by mid-June. 8:27 pm, May 27, 2021 × (Forum News Service file photo) BEMIDJI -- The number of crews working on Enbridge's Line 3 replacement project is steadily increasing as a spring break comes to a close. During a virtual construction update Wednesday, project officials said the break was planned to accommodate seasonal restrictions. The number of workers on the project went down to 900 during this time, but crews are returning now and the amount of laborers is expected to reach 4,000 by mid-June.