Forensic Geotechnical Investigation
The forensic investigation included site visits to document damage and conduct elevation surveys. Fifteen exploratory borings were drilled to depths of up to 18.3 m (60 ft).
A deep benchmark was installed in the deepest boring to provide a stable point for elevation
surveys.
Four of the exploratory borings were drilled at the grandstand,
two of which were located at the top of the grandstand and
two at the toe. Inclinometers were installed in one boring at the top
(EA-I1), and one at the toe (EA-I2). Piezometers were installed in
the other two borings.