Overview of CPRA Operations and Hurricane Response in Coastal Louisiana

CPRA Operations Division May 2020

committed to our coast committed to our coast Emergency Management

Responsible for flood protection infrastructure and integrated coastal protection projects across the Louisiana Coastal Area Hazards that have the potential to affect CPRA operations and infrastructure include: . Hurricanes . Flooding and High Water Events . Large Scale Coastal Oil Spills or HazMat Incidents Emergency Management CPRA – 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) and the local 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 Emergency Management CPRA – During an Event

. Provides staff and capability to support the State’s Emergency Operations Center (EOC). CPRA staffs the EOC’s Emergency Support Function (ESF) 3b infrastructure desk . Coordinates with local, State, and Federal entities including Parish Governments, Levee Boards, and other jurisdictions in Louisiana’s Coastal Area . Local requests are made when the requesting jurisdiction has exhausted all resources and no longer has the capability to support themselves. ALL REQUESTS MUST GO THROUGH WEB EOC . Requests generally involve maintaining the integrity of levee and flood control infrastructure in order to save lives and protect property . CPRA relies on emergency contracts through the Office of State Purchasing to procure temporary flood protection measures, de- watering support, etc. Emergency Management CPRA – Following an Event

. Performs Damage Assessments: . Inspects levee, flood protection, and integrated coastal protection projects throughout coastal Louisiana to protect lives and property as well as to ensure continued suitability of service . Coordinates inspections with the appropriate local and Federal authorities . Where issues are found, makes requests to 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 & Tributaries (MR&T) • USACE Surge Atlas of

These toolstools are are intended intended to to help help guide guide CPRA CPRA and and the the levee levee districts districts with with the the necessary informationinformation to to make make operational operational decisions decisions on oncoastal coastal floodgate floodgate closures asas a a tropical tropical storm storm approaches approaches landfall. landfall. These These operational operational tools tools are notare intended for evacuation purposes – for this we use the National Weather Service not intended for evacuation purposes – for this we use the National Weather and Local Authorities. 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 Hurricane and Storm Damage Risk Reduction System (HSDRRS)

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

The system will reduce the risk associated with a that has a one percent (1%) chance of occurring in any given year, or a 100-year storm surge. 8 Levee Information Management System LIMS

. 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 LIMS Public Web Site

. Public Gate Status . Map Viewer . Levee Gates List 678 GATES

Report Run Date 05/13/2020 9:34 AM Hurricane Gage Monitoring System (HGMS) Water-level gage data HSDRRS Major Structures Current Stage Estimated Max MAJOR Gate Closure LOCATION Wind Speed (MPH) (date / time) Stage (ft.) STRUCTURE Trigger (ft.) Max Stage Date/Time Oakville 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 39 Harvey Sector Gate Harvey Canal at Boomtown Casino (76230) (USACE) Bayou Segnette Complex Bayou Segnette Sector Gate - Flood Side (82742) 2 39 Bayou Dupre Sector Gate Bayou Dupre Sector Gate - East/Flood Side (76010) (USACE) 2 39 Sellers Canal Sector Gate - Flood Side (82715) 2 39 Sellers Canal Complex 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 2 Hero Canal Bulkhead Control Structure - Flood Side/West (82762) Lake Pontchartrain at Mandeville (85575) (USACE) 25 When surge anticipated to IHNC Surge Barrier Flood Side (76030) (USACE) reach 5.0 or IHNC Complex 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) WCC 2.0-3.8 39 GIWW at West Closure Complex Flood Side (76265) Lake Pontchartrain West End (85625) (USACE) 17th Street: 4.0 Lake Pontchartrain at Lakefront Airport, LA PCCP Orleans Ave: 4.0 N/A ** PCCP gages, Lake side (17th St, Orleans, London)(only via SCADA) London Ave: 3.0 Seabrook Sector Gate Seabrook Floodgate Closure Structure - Lake Side (76065) (USACE) 3.0 & Rising N/A N/A Barataria Pass at Grand Isle (073802516) (USGS) N/A N/A N/A Rigolets at Hwy 90 near Slidell (85700) (USACE) N/A N/A N/A Barataria Waterway at Lafitte, LA (82875) N/A N/A N/A ; (NGVD - 0.82 = N/A Mississippi River at New Orleans (Carrollton) (01300) (USACE)(NAVD) N/A NAVD88 2009.55) PRE-DECISIONAL -

Empire Floodgate Mississippi River at Empire (01440) (USACE) (New gage to be installed; date DELIBERATIVE – 2.5 & Rising (NOV-13) TBD) [(Temporarily recommend using Mississippi River at Venice (01480)] 39 FOR INTERNAL USE Mississippi River at Empire (01440) (USACE) (Gage to be reinstalled, Empire 3 to 4 & Rising ONLY -NOT FOR date TBD) [(Temporarily recommend using Mississippi River at 39 (NOV-14) (closed before 5) Venice (01480)] RELEASE N/A Freshwater Canal Freshwater Canal at Freshwater Bayou Lock South (76593) (MLG) N/A 13 N/A ; (MSL + 0.421 = Calcasieu River Calcasieu River at Cameron, LA (USGS) (08017118) (MSL) N/A NAVD88) ADCIRC Surge Guidance System

. CPRA awarded a contract to LSU’s Center for Coastal Resiliency (CCR) team which includes Scimaritan’s Dr. Jason Fleming to implement and maintain the ADCIRC Surge Guidance System (ASGS) for the modeling of storm surge for hurricanes and tropical events. . ASGS model output provides CPRA and the Levee Districts with water elevation forecasts to assist with operational decisions on coastal floodgate closures as a hurricane 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 Example Hydrograph: Permanent Canal Closures and Pumps (PCCP-01)

For Operational Use Only – Refer to NWS for evacuation-related forecasts 15 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 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 NHC Advisory 1000 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.

17 Low areas along HSDRRS & MR&T

For Information Purposes Only – Not For Public Release 18 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_mississippi https://www.nhc.noaa.gov/ • Each storm in the ATLAS has a unique set of parameters including track, minimum , 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:

19 USACE Storm Surge Atlas of MS River

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

Wind Speeds

20 USACE Storm Surge Atlas of MS River

Storm Parameters

Levee Elevations

For Information Purposes Only 21 Surge Profile West Bank

For Information Purposes Only

22 Surge Profile East Bank

For Information Purposes Only

23 Questions?

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