Constructed by Detroit-based Lakeshore Toltest JV LLC., the Wadi Mitigation and Outer Perimeter Road project was built after the garrison experiences two back-to-back 100-year floods in 2009 and 2010. A 100-year flood is often described as flooding that is expected to exceed water levels every 100 years on average, thus there is a 1 percent chance of being equaled or exceeded in any single year. The wadi (pictured) channels water from heavy rains and runoff away from the Afghanistan National Army's 201st Corps Garrison infrastructure in Gamberi, Laghman Province, Afghanistan.