New high-water mapping tool offers flooding estimates

In order to help keep Augusta area residents informed on water levels, we created a new online tool that estimates anticipated high-water inundation along the Savannah River through both Augusta, Georgia, and North Augusta, South Carolina.

The interactive map provides only flooding estimates but the tool is based on historical data.

The interactive map shows areas likely to have water outside the river’s channel at different flow levels. You can adjust the map to show levels ranging from 30,000 cubic feet per second (cfs) up to 200,000 cfs. We don’t have plans at this time to expand the areas covered by the maps.

You can access this map directly by clicking here. We’ve also added a link to it from our water management page. Look for the tab called “Inundation Maps” (on the left side of the page below the “Select Gauge of Interest” button).

Users must acknowledge the maps’ limitations before using the tool.

Update on Conditions
River flow through Augusta currently remains approximately 33,000 cubic feet per second (cfs) according to the U.S. Geological Survey gauge at the New Savannah Bluff Lock and Dam.

Augusta’s current river flow is a total of Thurmond Dam discharge combined with natural inflow below the dam.

We are currently releasing water through Thurmond Dam at 20,000 cfs and expect to increase to 30,000 cfs beginning Sunday or Monday.

Increasing discharge should not impact overall flow through Augusta, because we plan to increase releases proportionately to decreases in natural inflows.

If rain forecasts for next week materialize as predicted (approximately 2 inches across the basin), we may need to open spillway gates at all three dams, but not likely before Tuesday.

If rising reservoir levels determine a need to release water through the spillway gates, we will make a public announcement with as much advance notice as possible.

We don’t expect river flow through the Augusta area to significantly change through next week, even with spillway operation. However, additional rainfall next week or beyond next week may result in overall increased flows through Augusta.

We plan to post updates via this blog, so please subscribe to receive updates by email, and follow us on Facebook and Twitter.

We hope you find the mapping tool useful.

~Russell Wicke, Corporate Communications Office

About U.S. Army Corps of Engineers Savannah District

The U.S. Army Corps of Engineers Savannah District oversees a multimillion dollar military construction program at 11 Army and Air Force installations in Georgia and North Carolina. We also manage water resources across the Coastal Georgia region, including maintenance dredging of the Savannah and Brunswick harbors; operation of three hydroelectric dams and reservoirs along the upper Savannah River; and administration of an extensive stream and wetland permitting and mitigation program within the state of Georgia. Follow us on Twitter @SavannahCorps and on Facebook.com/SavannahCorps
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