Our agency does not hold the authority to close bridges, and the bridges are not scheduled to close at any specific time. The authority to close bridges, especially the "Georgetown Bridges" linking Georgetown to the Waccamaw Neck, belongs to the South Carolina Department of Transportation.
That said, bridges typically do not close in the case of inclement weather. The only time bridges will close is if they are structurally damaged or if there is a motor vehicle accident which will necessitate their closure. Otherwise, the bridges will typically remain open, but travel may not be advisable depending upon conditions.