She fell about eight feet from a platform above the stage during Saturday's performance of Charles Gounod's "Faust."
White suffered bruises but no broken bones.
Opera spokesman Peter Clark tells The Wall Street Journal that a hinge in a plank gave way as White was performing the role of Marthe.
The accident occurred during Act III. A curtain was brought down and intermission was announced. The performance resumed with Theodora Hanslowe in the role.
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