"It was a 2 day old fawn she was not able to swim," said Dave Dennis, president of the volunteer team.
The fawn was born on a tiny island in the middle of the river, and with the rising water, the island was getting smaller by the hour.
"The baby wouldn't have survived for any length of time," said Chico Marvici.
The two men suited up in protective gear and swam out to the island. First they flushed out the mother deer, then they quickly found the baby.
"I picked her up and just held her," said Chico. "I think she knew that she was in good hands," Dave said.
The crew put the fawn in a recovery bad and hoisted her up to a bridge where she was turned over to wildlife officials.
They put her in some grass near the mother, who had been watching the whole ordeal.
"Baby and Mama were reunited. They are perfectly fine," said Chico.
It was quite a memorable call for the dive rescue team. For a group that has seen some tough stuff, it was great to have such a positive outcome.
"This was probably one of the coolest things I've done since being on the team," Chico said.
The Larimer County Dive Rescue Team is a volunteer organization.