During inclement weather, rain and any runoff will run down the concrete pavement and into the concrete storm drains. Because the pavement around both drains had cracks, water seeped into the soil, weakening the soil integrity and further weakening the integrity of the concrete over time. On a seperate note, our commercial client manufactures rough terrain container handlers, a heavy duty tractor like machine that carries and transports filled shipping containers. A combination of this excess weight and the weakened concrete pavement made it unsafe for any traffic to drive over these storm drain areas. Looking at the civil design specs of the pavement around the storm drains revealed that it was mainly designed to handle regualr traffic and not the weight of traffic from heavy machinery.