Last year, the Chardham Yatra had also come under a cloud over the death of at least 74 pilgrims within the first month of the start of the pilgrimage.

Source: https://indianexpress.com/article/political-pulse/chardham-yatra-again-protests-again-lifting-of-daily-pilgrim-cap-by-uttarakhand-govt-8571284/

The 4531-metre Silkyara Tunnel is part of the Chardham Project of the Ministry of Road Transport and Highways and will link the Gangotri and Yamunotri axis under the Radi Pass area.

Source: https://www.dailyexcelsior.com/uttarakhand-govt-to-provide-accommodation-food-health-facilities-to-kin-of-workers-trapped-in-uttarkashi-tunnel-collap/

The incident occurred on November 12, during ongoing construction work for the Chardham all-weather road.

Source: https://www.baltimoregaylife.com/40-workers-trapped-in-collapsed-road-tunnel-in-north-india-rescuers-race-against-time/