Rio Grande at Columbia Bridge

30' - or 9.1 meters, major lowland flooding occurs. Water is several feet deep over most of the mall and customs parking lots. The lowest residences are threatened and roads and low bridges become very dangerous.

28' - or 8.5 meters, the flow reaches the height of left bank. Flow exceeds left bank near the gauge. Most of customs and mall parking lots are inundated downstream in Laredo. The lowest residences are threatened in Laredo and Nuevo Laredo. Livestock, pumps, and equipment in the river channel are flooded

24' - or 7.3 meters, moderate lowland flooding occurs, and cuts off livestock, irrigation pumps, and equipment above eagle pass to below Laredo. Autos and trucks flood in the customs and mall parking lots downstream in Laredo.

18' - or 5.5 meters, flow reaches the height of the right bank. Livestock and equipment flood in the channel and low banks below eagle pass to below Laredo. Autos and trucks flood in low areas of the customs parking lot downstream in Laredo.

16' - or 4.9 meters, overbank conditions occur over the low areas of the flood plain.

10' - or 3.0 meters, this is the caution stage for pumps and livestock in the channel.