Metro Flood Preparedness
US ARMY CORPS OF ENGINEERS BUILDING STRONG®
AUTHORIZATION: Section 22 of the 1974 Water Resources and Development Act (WRDA), Planning Assistance to States, (PAS).
TYPE OF PROJECT: Flood Risk Management
LOCATION: Nashville, TN
CONGRESSIONAL INTEREST: Jim Cooper (TN-05), Alexander (TN), Corker (TN)
NON-FEDERAL SPONSOR: City of Nashville, TN
BACKGROUND:
· As a result of the May 2010 flood, Metro Nashville is partnering with the Corps to develop flood inundation models and tools for all streams in Davidson County. The tools will enable the city to better predict what is likely to occur under different flooding scenarios and are being included in the Nashville SAFE tool. The inundation models will help Metro know what is flooded at various flood stages on the Cumberland and Harpeth Rivers and predict what could flood on the smaller streams based on forecasted rainfall. The USGS and NWS are also working on this project. The USGS has added new gages and is updating rating curves for the existing gages. NWS is working on additional forecasting for specific creeks and updating flood alerts levels and actions.
· The models are being shared with FEMA for inclusion in the Flood Insurance Map update for Davidson County. About 310 miles of streams have been updated to date.
IMPORTANCE: Updating the FIS will help better define floodplains and reduce future flood risk. Providing better tools for decision makers and emergency responders will also reduce flood risk.
STATUS:
· Phase 1 completed May 2011
· Phase 2 completed December 2012
· Phase 3 completed April 2013
· Phase 4A initiated in August 2013
· Phase 4B initiated August 2014
· Phase 4C and 4D to be initiated in 2015
BUDGET ($): Estimated project costs are shown below.
Total Estimated Cost
|
$2,136,000
|
Federal Cost Estimate
|
1,068,000
|
Non-Federal Cost Estimate
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1,068,000
|
|
|
Federal Funds Data
|
|
Allocation thru FY 2014
|
$928,000,
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Allocation for FY 2015
|
43,000
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Balance to Complete
|
97,000
|
President’s Budget for FY 2015
|
0
|
Note1 – PAS studies are cost shared 50/50
SCHEDULE:
FY2011 Completed Work: Phase 1 products included inundation layers and modeling for the Cumberland and Harpeth Rivers and Mill, Richland, Whites, and Browns Creeks.
FY2012 Completed Work: Phase 2 work included updated frequency and hydrologic analyses for Richland, Whites and Browns Creeks, incorporation of new LIDAR data, and Flood Insurance Studies (FIS) model development. 32 miles of tributary streams were added to the Whites Creek FIS data and about 27 miles to the Harpeth River data. Lastly, the hydraulic and economic impact of potential flood damage reduction alternatives are being evaluated at a preliminary level for Richland, Whites and Browns Creeks.
FY2013 Completed Work: Turned over the Cumberland and Harpeth River and Browns, Richland, and Whites Creeks FIS studies to FEMA for their use in updating Davidson County. Initiated Phase 3 for the Stones River Watershed below JP Priest Dam including the Stones River, Stoners, and McCrory Creeks.
FY2014 Completed Work: Completed Phase 3 and initiated Phase 4A. Scope includes updates to the FIS study for additional streams including Gibson, Coopers, Indian, Loves, Overall, Pages and Windemere Watersheds.
FY2015 Work: Complete Phases 4A and 4B and initiate Phases 4C and 4D.
Completion: Work is estimated to be completed in 2016.
For more information regarding Nashville Flood Preparedness Studies, contact Amanda Burt, CELRN-PM, phone: (615) 736-7851, email: Amanda.L.Burt@usace.army.mil