The BRA will be performing a test of flood gate number 3 at Possum Kingdom Lake this afternoon at about 2 p.m. This gate has been out of service for maintenance work for several months and is now ready to be placed back in service. The gate will be fully opened and closed during the test, which is expected to last less than one hour. A moderate rise in the river level will occur in portions of the river immediately downstream of the dam, but because the gate will only be open briefly, no major impacts to the river will occur. The impact to the lake level will be less than ½ inch.