According to the Clark County Public Works page, the arch bridge is over three stories tall.
The girl's mother says a fall from even half that height could have killed her daughter, and that she hopes the person responsible will turn themselves in.
"My daughter's gonna have a long road to recovery and I think that she should probably just turn herself in - realize what she did wrong. This is not okay. She could have killed my daughter," the girl's mom, Genelle Holgerson, said.
The 16-year-old is now in the hospital with five broken ribs and a lung injury.
