30.73' - Flood of record occurred on September 3rd, 2017, during Hurricane Harvey. Massive widespread flooding occurred. Part of West Columbia is threatened.
30' - Homes in Columbia Lakes are threatened.
29' - Major flooding continues with widespread structure flooding occurring.
28.5' - Lowest areas in East Columbia are threatened.
28' - Major flooding begins with subdivisions such as Mallard Lakes and Great Lakes being cut off. Low-lying areas along State Highway 35 on the left bank/north side are flooded with approximately 1.0ft of inundation. State Highway 35 is impassable.
27.5' - State Highway 35 has at least 0.5 foot of inundation.
27' - Moderate flooding begins as water escapes the mainstem of the Brazos River near the gauge. Low lying homes in the City of Brazoria are threatened, and widespread county road flooding occurs. Low lying areas along State Highway 35 on the left bank/north side are flooded. State Highway 35 and the lowest areas of Bar X are threatened.
26' - Minor flooding begins as water escapes the mainstem of the Brazos River approximately 5 miles downstream of the gage. County roads begin to take on water.
20' - Action stage begins as water begins to backup tributaries of the mainstem, specifically Varner Creek.