Trigen-St. Louis Energy crews are working to repair the damage. They have secured the leak and shut down the leaking pipe. Right now there is only a small amount of steam escaping. It is not yet known why the pipes burst under St. Louis.
11th street will be shut down as crews repair the damage. The repairs could take weeks.
No injuries were reported in this accident.
You may not know it but a maze of pipes carrying steam run underneath downtown St. Louis. It is called the 'steam loop' and it was built in 1922.
The steam system is similar to others found in large cities. Steam loops are used to heat large buildings in urban areas.