Hydrophone Data from Brandon Road Lock and Dam, (2014)

The data collection for the concrete-walled channel downstream from the Brandon Road Lock and Dam near Joliet, Illinois occurred in May 2014 Five pounds per square inch (lb/in2) was used as a threshold water pressure value for this study as this value incorporates fish behavior and structural integrity considerations. The Brandon Road study evaluated the performance of two different water gun configurations within the concrete-walled channel downstream from the lock with depths ranging from 12-15 feet. Data from a single 80 cubic inch (in³) water gun produced a roughly cylindrical 5 lb/in2 pressure field 20 feet in radius, oriented vertically, with the radius decreasing to less than 15 feet at the surface. A combination of two 80-in³ water guns produced a similarly shaped 5 lb/in2 pressure field 30 feet in radius. Velocity and acceleration data were collected simultaneously with the underwater pressure data to understand the response of the adjacent channel walls to the water gun firings. Maximum values for velocity and acceleration were 0.239 inches per second (in/s) and 0.019 feet per second squared (ft/s²), respectively.