Rescuers had drilled Friday to what had been the basement garage of the nine-story building that collapsed here last month only to find that it was filled with water and held no survivors, Lt. Col. Moazzem Hossain said Saturday.
But the disappointment did not last.
The late-afternoon operation had opened a hole in another part of the mound above what remained of the second floor, which had been filled with shops, he said. Perhaps alerted by the light, someone inside stuck a stick through the hole.
"When I was cutting iron rods, suddenly I found a silver-colored stick just moving from a hole, and I looked through and I saw someone calling, 'Please save me,' " rescue worker Mohammad Rubel Rana told Reuters. "Then instantly I called the army and firefighters and said, 'Please look, I heard a sound.' Then they saw her and confirmed that there was a woman."
Hossain then went into action.
"I told her, mother, don't be afraid, we are here to rescue you," Hossain said, according to Bangladesh Sangbad Sangstha (BSS), the state-run news agency. "Would you like to drink water?"
A second hole was drilled by hand, to ensure that no sparks from a machine could ignite a fire, as occurred during a previous failed rescue attempt, he told CNN in a telephone interview.
The hole -- a crescent about 1.5-feet long and 1-foot wide -- revealed Reshma, a 19-year-old garment worker, wife and mother in cramped quarters on the floor about 7 feet down.
At 5-foot, 7-inches and 143 pounds, Hossain was just able to slide down into the darkness, where Reshma was standing.
"The first word was, 'Save me, save me,' " he said. "She was very afraid, she was hyper-panicked you can say," he said. Hossain tried to calm her. "We are here," he told her. "We are not going until we save you."
Hossain then lifted the woman into the opening, from which other rescuers completed the job.
"I was just lying down in a sloping manner up to the hole and then I was pushing her body over my body so that she can just go up."
At 4:26 p.m., once she had been lifted to safety, Reshma erupted in tears, Hossain said. "She was very thankful to my team; this cry was the happiest cry she had."
Hundreds of onlookers erupted in cheers.
Hossain credited the fact that both he and the woman are thin with the success of the operation, given that there was little space available to widen the hole. "That was the luckiest part," he said. "Otherwise, the operation would have been very difficult."
Hossain said the trapped woman had enough room to stand and to sit, but not enough room to lie down during her more-than 16 days of confinement.
She and her family were not the only ones who were happy. Hossain's children were watching on TV they told him "my mama was crying," he said, adding that he was still focused on the recovery and hoped that more survivors would emerge.
After being given water and biscuits, Reshma was placed on a stretcher, put into an ambulance and whisked to Combined Military Hospital in Savar, the suburb of the capital city, Dhaka, where the building collapsed.
There, video showed her lying in bed, a nurse at either side connecting intravenous drips to her arms and a third nurse at the head of her bed. Whenever she raised her head to see what was going on, the nurse in the middle would gently push it back to the pillow and stroke her hair.
"She is fine now," said Capt. Ibrahim Islam, a Bangladeshi military official.
Reshma told her rescuers that she survived on dry food and water that had been tossed into the rubble in the first days after the collapse, BSS reported.
"I ate biscuits and water," she told rescuers. "But the stock dwindled two days ago."
She told doctors at the military hospital in Savar that she was wracked by thirst for the last two days of her saga, all of which was spent in the dark between floors that had pancaked in the collapse.
The rescued woman's mother-in-law, Ayesha, said she was overjoyed.
"I have not seen her yet, but I am very happy that she is alive," Ayesha said. "At least my grandchildren got their mother back. All my grandchildren are now overwhelmed."