Ajo Drainage Improvements

Location: Tucson, AZ
Client: Pima County Regional Flood Control District
Status: Completed

After extensive damage from a flood in 2003, Pima County embarked upon several drainage improvement projects. NCSG performed seismic refraction surveys and soil borings to determine excavatability for potential channel modifications at one location, and a detention basin at another site. Detailed seepage analysis were also performed to evaluate the drawdown rate of impounded water in the detention basin.

Seismic Refraction Survey
Contour map of maximum seismic velocities in Layer 3
Construction of the detention basin as part of the overall drainage improvements.