The worst of the damage appears to be near the curb line and away from the intricate parts of the artwork. However a closer look reveals cracking farther into the work, but this area does not appear to be severely heaved.
Given that large areas of the artwork remain unscathed, it would seem that everything possible should be done to restore the damaged portions of the artwork so that this irreplaceable is not lost forever.
The Art Deco portico by Wischmeyer & Murphy was completed in 1939, the terrazzo mural however was not installed until 1971. It was designed by Nancy Day, a student at Washington University who won a design contest for the floor at the main entrance of the Muny.
According to a Channel 5 News report, Sean Smith, the Director of Operations at the Muny is pessimistic that the artwork can be saved at all and the report states that a bare concrete slab may greet theater goers the summer! This seems like an extreme view, given that much of the artwork appears un-damaged. The report goes on to mention that the water main will be re-located out into the street so that it can never again cause problems for the building.