Overview of CPRA Operations and Hurricane Response in Coastal Louisiana

CPRA Operations DivisionMay 2020

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Emergency Management

Responsible for flood protection infrastructure and integrated coastalprotection projects across the Louisiana Coastal AreaHazards that have the potential to affect CPRA operations and infrastructureinclude: Hurricanes Flooding and High Water Events Large Scale Coastal Oil Spills or HazMat Incidents

Emergency ManagementCPRA – Prior to an Event Maintains an Emergency Operations Plan (EOP) which outlines CPRA’s

pre- and post-storm activities

Coordinates with the United States Army Corps of Engineers (USACE) andthe local levee districts within the Coastal Area

Maintains a list of Levee District items: Emergency Contacts EOPs Flood Fight inventories, supplies and

equipment to support emergency response

Levee Information Management System (LIMS) Monitor closing of gates in advance of an

event Plan executions of gate closures by monitoring gage readings and

coordinating for ADCIRC modeling

Provides staff and capability to support the State’s EmergencyOperations Center (EOC). CPRA staffs the EOC’s Emergency SupportFunction (ESF) 3b infrastructure desk

Coordinates with local, State, and Federal entities including ParishGovernments, Levee Boards, and other jurisdictions in Louisiana’sCoastal Area

Local requests are made when the requesting jurisdiction hasexhausted all resources and no longer has the capability to supportthemselves. ALL REQUESTS MUST GO THROUGH WEB EOC

Requests generally involve maintaining the integrity of levee andflood control infrastructure in order to save lives and protectproperty

CPRA relies on emergency contracts through the Office of StatePurchasing to procure temporary flood protection measures, de-watering support, etc.

Emergency ManagementCPRA – During an Event

Emergency ManagementCPRA – Following an Event

Performs Damage Assessments: Inspects levee, flood protection, and

integrated coastal protection projectsthroughout coastal Louisiana toprotect lives and property as well asto ensure continued suitability ofservice

Coordinates inspections with theappropriate local and Federal authorities

Where issues are found, makes requeststo the USACE for federal assistance

Coastal Protection and Restoration Authority

Keys to operations: • COVID-19 challenges• Hurricane and Storm Damage Risk Reduction System (HSDRRS)• Levee Information Management System (LIMS)• Hurricane Gage Monitoring System (HGMS)• ADCIRC Surge Guidance System (ASGS)• HSDRRS and Mississippi River & Tributaries (MR&T)• USACE Surge Atlas of Mississippi River

These tools are intended to help guide CPRA and the levee districts with the necessary information to make operational decisions on coastal floodgate closures as a tropical storm approaches landfall. These operational tools are not intended for evacuation purposes – for this we use the National Weather Service and Local Authorities.

These tools are intended to help guide CPRA and the levee districts with the necessary information to make operational decisions on coastal floodgate closures as a tropical storm approaches landfall. These operational tools are not intended for evacuation purposes – for this we use the National Weather Service and Local Authorities.

COVID-19 Challenges

• Coordinating with the Levee Districts on gate closures earlier than past years

• Engaging with the Coast Guard earlier about enacting Regulated Navigation Area (RNA)

• Executing Windshield Assessments after Storm Event• Executing Comprehensive Inspections with Levee

Districts and USACE• Communications

The $14.45 billion Hurricane and Storm Damage Risk Reduction System(HSDRRS) covers the Greater New Orleans Area and consists of: 350 miles of levees and floodwalls; 73 non-Federal pumping stations; 3 canal closure structures with pumps; and 4 gated outlets.

Hurricane and Storm Damage Risk Reduction System (HSDRRS)

The system will reduce the riskassociated with a storm surgethat has a one percent (1%)chance of occurring in anygiven year, or a 100-year stormsurge. 8

Levee Information Management SystemLIMS Log closure structure operations Store closure structure

info/attributes Create closure structure status

reports Display closure structure status

graphically Link to document library

Contact Directory EOP Manuals Statewide Emergency Contracts Local Flood Fight Asset Inventory

LIMSPublic Web Site

Public Gate Status Map Viewer Levee Gates List

Report Run Date 05/13/2020 9:34 AM

678 GATES

Hurricane Gage Monitoring System (HGMS)Water-level gage data

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HSDRRS Major Structures

PRE-DECISIONAL -DELIBERATIVE –FOR INTERNAL USE ONLY -NOT FOR RELEASE

Current Stage(date / time)

Max Stage Date/TimeOakville Drainage Structure Oakville Levee Pump Station Flood Side (82770) -3.0 & Rising 39

Harvey Canal Sector Gates North / Prot Side nr Lapalco Blvd (76220) 2.0 & Rising 39Harvey Canal at Boomtown Casino (76230) (USACE)

Bayou Segnette Complex Bayou Segnette Sector Gate - Flood Side (82742) 2 39Bayou Dupre Sector Gate Bayou Dupre Sector Gate - East/Flood Side (76010) (USACE) 2 39

Sellers Canal Sector Gate - Flood Side (82715) 2 39 Bayou Verret / Western Tie-In Sector Gate - Protected Side (82718)Seller Canal at Hwy 90 (Pier 90) (82720) (USACE)

Caernarvon Sector Gate Caernarvon Canal Sector Gate - Southeast Floodside (85760) (USACE) 2.5 & Rising 39

Hero Canal Stop Log Gate Hero Canal Bulkhead Control Structure - Flood Side/West (82762) 2

Lake Pontchartrain at Mandeville (85575) (USACE)

IHNC Surge Barrier Flood Side (76030) (USACE)

When surge anticipated to reach 5.0 or greater

IHNC Surge Barrier Protected Side (76032) GIWW near Paris Road Bridge (76040)Shell Beach (8761305) (NOAA)

Bayou Bienvenue Flood Gate Bayou Bienvenue Floodgate - East/Flood Side (76025) (USACE) 3 39

GIWW at West Closure Complex Protected Side (76260)GIWW at West Closure Complex Flood Side (76265)Lake Pontchartrain West End (85625) (USACE)Lake Pontchartrain at Lakefront Airport, LA

** PCCP gages, Lake side (17th St, Orleans, London)(only via SCADA)

Seabrook Sector Gate Seabrook Floodgate Closure Structure - Lake Side (76065) (USACE) 3.0 & Rising N/AN/A Barataria Pass at Grand Isle (073802516) (USGS) N/A N/AN/A Rigolets at Hwy 90 near Slidell (85700) (USACE) N/A N/AN/A Barataria Waterway at Lafitte, LA (82875) N/A N/A

N/A Mississippi River at New Orleans (Carrollton) (01300) (USACE)(NAVD) N/A N/A ; (NGVD - 0.82 = NAVD88 2009.55)

Empire Floodgate (NOV-13)

Mississippi River at Empire (01440) (USACE) (New gage to be installed; date TBD) [(Temporarily recommend using Mississippi River at Venice (01480)] 2.5 & Rising 39

Empire Lock(NOV-14)

Mississippi River at Empire (01440) (USACE) (Gage to be reinstalled, date TBD) [(Temporarily recommend using Mississippi River at Venice (01480)]

3 to 4 & Rising (closed before 5)

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Freshwater Canal Freshwater Canal at Freshwater Bayou Lock South (76593) (MLG) N/A N/A

Calcasieu River Calcasieu River at Cameron, LA (USGS) (08017118) (MSL) N/AN/A ; (MSL + 0.421 =

NAVD88)

N/A

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LOCATIONMAJOR STRUCTURE

Estimated Max Stage (ft.)Wind Speed (MPH)Gate Closure

Trigger (ft.)

Harvey Sector Gate

IHNC Complex

17th Street: 4.0 Orleans Ave: 4.0 London Ave: 3.0

2.0-3.8WCC

PCCP

Sellers Canal Complex

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CPRA awarded a contract to LSU’s Center for Coastal Resiliency (CCR) team whichincludes Scimaritan’s Dr. Jason Fleming to implement and maintain the ADCIRCSurge Guidance System (ASGS) for the modeling of storm surge for hurricanesand tropical events.

ASGS model output provides CPRA and the Levee Districts with water elevationforecasts to assist with operational decisions on coastal floodgate closures as ahurricane approaches

ADCIRC grid is updated each year with the latest bathymetric and topographic data ASGS is tested and validated using historical storm data. Automated forecast system is maintained in ready-mode during hurricane season

ADCIRC Surge Guidance System

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Example Hydrograph:Permanent Canal Closures and Pumps (PCCP-01)

For Operational Use Only – Refer to NWS for evacuation-related forecasts

Frequently Used Sites

• CPRA CIMS https://cims.coastal.louisiana.gov, (login required for HGMS and LIMS Private)

• HGMS: Navigate to Protection > HGMS Private > Map Viewer. Displays water level and meteorological data for CPRA, USACE, USGS, and NOAA gages.

• LIMS: Navigate to Protection > • Select “LIMS Gate Status”, which is the publicly-accessible

open/closed status of gates/closures.• Select “LIMS Private”, allows levee districts/authorities to change

gate/closure status to open/closed.

• Rivergages website: www.rivergages.com; backup resource for checking water levels on GOES network; source for pulling data to other sites e.g. CIMS HGMS.

• CIMS - Coastal Information Management System• HGMS – Hurricane Gage Monitoring System• LIMS – Levee Information Management System• GOES - Geostationary Operational Environmental Satellite

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2020 Hurricane Battle Rhythm CPRA GOHSEP

0000 Receive hydrographs from LSU Publish Incident Action Plan

0030 CPRA forwards hydrograph slides to key levee districts

0400 NHC Advisory

0600 Receive hydrographs from LSU Shift Change

0630 Hydrograph QC Call (CPRA, MVN, LSU) (SEE CALL INSTRUCTIONS BELOW) Slides due for Unified Command Brief

0700 Send Briefback slides out

0730 Levee District Briefback Meeting to CPRA (w/USCG)

0830 USACE Commander's Conference Call

0900 Receive Levee District Rollup report from CPRA Field Offices

1000NHC Advisory

Navigation Call GOHSEP Unified Command Brief

1100 SE LA Hurricane Task Force Call SE LA Hurricane Task Force Call

1130 SW LA Hurricane Task Force Call SW LA Hurricane Task Force Call

1200 Receive hydrographs from LSU

1230 Hydrograph QC Call (CPRA, MVN, LSU)

1245 Send hydrograph slides out

1600 NHC Advisory

1800 Receive hydrographs from LSU Shift Change

1830 Hydrograph QC Call (CPRA, MVN, LSU) (SEE CALL INSTRUCTIONS BELOW)

1900 Send Briefback slides out Incident Action Plan Planning Meeting

1930 Levee District Briefback Meeting to CPRA (w/USCG)

2030 USACE Commander's Conference Call

2200 NHC Advisory

Note: Times of calls are subject to change based on advisories and other calls.

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Low areas along HSDRRS & MR&T

For Information Purposes Only – Not For Public Release

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USACE Storm Surge Atlas of MS River• Surge profile plots of the Mississippi River from 2010 USACE Storm Surge Atlas• The ATLAS is a dataset of 152 previously computed ADCIRC simulations.• The ATLAS should not replace official forecast from the Weather Service and the

National Hurricane Center https://www.weather.gov/lmrfc/obsfcst_mississippihttps://www.nhc.noaa.gov/

• Each storm in the ATLAS has a unique set of parameters including track, minimum pressure, forward speed, radius and wind-speed.

• Each storm is simulated with various flows in the Mississippi River. • The profile plots compare ADCIRC water levels to levee elevations along the lower

Mississippi River.• The following provides more information about the data provided in each profile plot:

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USACE Storm Surge Atlas of MS River

Wind Speeds

Time to Landfall (hrs)/ Central Pressure (mb)

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USACE Storm Surge Atlas of MS River

For Information Purposes Only

Storm Parameters

Levee Elevations

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Surge Profile West Bank

For Information Purposes Only

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Surge Profile East Bank

For Information Purposes Only

Questions?

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