Rescuers have broken through debris that trapped 41 men in an Indian tunnel for more than two weeks, an official has said.
They are expected to be pulled out one-by-one on wheeled stretchers through a pipe three feet wide.
However, more debris will need to be cleared before the tube can be pushed through, officials said.
It will take a couple of hours to complete the operation, they added.
Dozens of rescue workers with ropes and ladders are outside the tunnel and ambulances are waiting in a long line.
First aid will be provided on site before the men are taken to a hospital about 19 miles (30km) away.
The low-wage workers from India’s poorest states have been stuck in the three-mile (4.5km) highway tunnel in Uttarakhand since 12 November.
The men have been receiving food, water, light, oxygen and medicines through a pipe.
Last week, a drilling machine broke down, delaying the rescue operation.
But on Monday, so-called rat miners were brought in to drill through the rocks and gravel by hand.
A dozen men were taking turns with hand-held tools, said Kirti Panwar, a state government spokesperson.
They made good progress overnight, officials said earlier.
“About six or seven metres are left,” said Deepak Patil overnight, a senior officer leading the rescue.
Asked whether the men could be reached on Tuesday, he replied: “Sure, 100%.”
Rescuers had also started to create a vertical channel to drill down.
Pushkar Singh Dhami, the chief minister of Uttarakhand, previously said the damaged drilling machine would be removed by Sunday.
The tunnel is part of the £1.2bn Char Dham highway, being built to connect four Hindu pilgrimage sites through a 500-mile network of roads.
While authorities have not said what caused the collapse, there have previously been landslides, earthquakes and floods in the area.