Two cross-sectional graphs display subsurface velocity data from a shot location using a 10 lb sledgehammer. This seismic refraction survey across the tailings storage facility is plotted with station feet on the x-axis and elevation in feet on the y-axis. A colored legend indicates velocity in feet per second, ranging from less competent (1500 ft/s) to more competent (15000 ft/s).

Two cross-sectional graphs display subsurface velocity data from a shot location using a 10 lb sledgehammer. This seismic refraction survey across the tailings storage facility is plotted with station feet on the x-axis and elevation in feet on the y-axis. A colored legend indicates velocity in feet per second, ranging from less competent (1500 ft/s) to more competent (15000 ft/s).

Two cross-sectional graphs display subsurface velocity data from a shot location using a 10 lb sledgehammer. This seismic refraction survey across the tailings storage facility is plotted with station feet on the x-axis and elevation in feet on the y-axis. A colored legend indicates velocity in feet per second, ranging from less competent (1500 ft/s) to more competent (15000 ft/s).