Mississippi Coastal Improvements Program A Comprehensive Plan for Coastal Resilience

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1 Mississippi Coastal Improvements Program A Comprehensive Plan for Coastal Resilience 200 Coastal Resilience Symposium 26 May 200 US Army Corps of Engineers BUILDING STRONG

2 Mississippi Coastal Improvements Program P.L , 0 December 2005 Comprehensive Planning to Address Hurricane and Storm Damage Reduction Salt Water Intrusion Shoreline Erosion Fish and Wildlife Preservation Other Water Related Resource Projects Cost Effective Projects in lieu of NED benefits No Incremental Benefit-Cost Analysis Report requirements Interim Report within 6 months Comprehensive Plan within 2 years Compatible with State Coastal Restoration Plan 2

3 History of Problems from Storm Surge Coastal Mississippi is twice as likely to be impacted by a moderate to severe hurricane than the coast of Texas or the Florida panhandle Two of the most severe storms to hit the southern United States made landfall in Hancock County, MS Hurricane Camille, August 7, foot surge 62 Deaths Over 45,000 Structures Damaged Hurricane Katrina, August 29, foot surge (6 miles inland, 2 miles up rivers and tributaries) 28 Deaths Over 65,000 Structures Damaged Significant Damage to Natural Landscape

4 Katrina Camille Georges Betsy 4

5 MOBILE DISTRICT Storm Surge Model (ADCIRC) Hancock Co. Harrison Co. Biloxi Jackson Co. Pascagoula Bay St. Louis Cat Ship Horn Petit Bois New Orleans 5

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7 MOBILE DISTRICT Development of Lines of Defense Concept 2 MHW 5 4 BARRIER ISLAND RESTORATION 2 BEACH & DUNE NON-STRUCTURAL & ECOSYSTEM RESTORATION - SEAWALL, ELEVATED ROAD 4 - LANDWARD BARRIER NON-STRUCTURAL & ECOSYSTEM RESTORATION 5 - BEYOND THE MPI NON-STRUCTURAL& ECOSYSTEMRESTORATION EXISTING RAILWAY 7

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9 Planning Scenarios (Sea Level Rise) Baseline Moderate Rate Increased Rate 9

10 LA MS AL MOBILE DISTRICT Mississippi Coastal Improvements Program Comprehensive Plan 0

11 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT Comprehensive Plan Elements Interim Projects Phase I Projects Phase II Projects Future Studies Hancock County Harrison County Jackson County Bay St. Louis Waveland Gulfport 8 5 Gulfport 2 7 Biloxi 6 5 Gautier Moss Point 2 Pascagoula High Hazard Risk Area Cat Ship Horn Petit Bois % Chance Flood Risk Katrina Inundation Limits Littoral Zone Placement of Sand O&M Beneficial Use Placement

12 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT Interim Report Elements Hancock County Harrison County Jackson County Bay St. Louis Gulfport 7 Biloxi 6 5 Gautier 4 Moss Point 2 Pascagoula Waveland Cat Ship Horn Petit Bois 2

13 Franklin Creek MOBILE DISTRICT Clermont Harbor & Cowand Point Long Beach Pascagoula Beach Boulevard Seawall Protection

14 Shearwater Bridge, Gautier Streams and Jackson Marsh 4

15 Bayou Caddy Marsh Restoration Project Containment Structure New Marsh Bayou Caddy 5

16 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT Comprehensive Plan Elements Interim Projects Phase I Projects Ecosystem Restoration Studies Other Studies Hancock County Harrison County Jackson County Bay St. Louis Waveland Gulfport 8 5 Gulfport 2 7 Biloxi 6 5 Gautier Moss Point 2 Pascagoula High Hazard Risk Area Cat Ship Horn Petit Bois % Chance Flood Risk Katrina Inundation Limits Littoral Zone Placement of Sand O&M Beneficial Use Placement 6

17 Comprehensive Report Status P.L. -2 Authority for Barrier Island and Ecosystem Restoration $49M Initial Focus West Ship Island North Beach Barrier Island Studies Cat Island 7

18 Geophysical Investigations USGS Complete Geotechnical SAM begin May Benthic Studies Award in April SEIS Award in May Revised Sediment Budget On-going Cat Island Geomorphology, Acquisition Hydro, Wave, WQ Modeling ERDC On-going Bathymetric Surveys SAM On-going Lidar Surveys SAM May Sediment Color Studies Award April Delft D Sediment Transport Modeling ON-GOING STUDIES AND INVESTIGATIONS 8

19 Gulfport Channel Beneficial Use of Dredged Material Approximately 0,000 cubic yards of sand each from the widening and the old alignment, 80,000 CY total. Turbidity barrier to be used to protect SAVs West Ship Island North Beach Area 9

20 Study Area 20

21 Sandy(?) part of Holocene distributary delta Thickness in meters 2

22 Ship Island Inner Shelf Deposit Thickness in meters 22

23 Summary of Seismic Interpretation 2

24 Location of thickness of surface shoal deposits 24

25 Ecosystem Restoration Elements 25

26 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT Forrest Heights Levee and Waveland Floodproofing 26

27 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT High Hazard Area Risk Reduction Program Hancock County Harrison County Jackson County Gulfport Gulfport Biloxi Gautier Moss Point Pascagoula Bay St. Louis Waveland Cat Ship Horn Petit Bois % Chance Flood Risk Katrina Inundation Limits High Hazard Risk Area 27

28 Hurricane / Storm Salt Water Intrusion Shoreline Erosion Fish & Wildlife MOBILE DISTRICT High Hazard Area Risk Reduction Hancock County Harrison County Jackson County Gulfport Biloxi Gautier Moss Point Pascagoula Bay St. Louis Waveland Petit Bois Cat Ship Horn High Hazard Risk Area Katrina Inundation Limits 28

29 Phase I Comprehensive Plan Expected Performance Barrier Islands Near-term HARP Waveland Forrest Heights Beach and Dune Turkey Creek Bayou Cumbest Dantzler Admiral Island Franklin Creek SAV Pilot Deer Island $20M annual damages avoided, $4M annual fishery losses avoided,,50 acres restored, 4,900 jobs created 2,000 parcels removed, $M average annual damages, 4 municipal structures relocated and elevated, up to 5,200 jobs created 25 residential structures elevated, 54 jobs created $00K average annual damages reduced, 9 jobs created 60 miles of dune restoration, 208 jobs created 689 acres wet pine savannah, incidental flood storage capacity 0 acres tidal wetland, 8 acres scrub/shrub, incidental surge risk reduction 85 acres wet pine savannah, incidental flood storage capacity 62 acres tidal wetland, 6 acres scrub/shrub, incidental flood storage capacity 49 acres wet pine savannah, incidental flood storage capacity 5 acres submerged aquatic vegetation 400 acres of critical island habitats restored 29

30 GOMA / MsCIP Relationship Water Quality for Healthy Beaches and Seafood Restoration of barrier and near-shore islands and coastal marshes and wetlands will lead to improved water quality. Reduced Nutrient Impacts to Coastal Ecosystems Restoration of coastal marshes and wetlands and conversion of developed areas into marshes, wetlands, and green spaces will reduce the input of nutrients into coastal ecosystems. Habitat Conservation and Restoration Restoration of barrier and near-shore island habitats and moving private lands into the public sector will provide for habitat conservation and restoration. Increased Coastal Community Resiliency Restoration of barrier and near-shore islands enhances protection of mainland areas. Moving private lands into the public sector reduces impacts of future storms and hurricanes and increases resiliency and sustainability Education Inclusion of evacuation planning, floodplain management and other issues under the purview of local and state entities increases community resiliency and supports the other GOMA issues 0

31 Susan Ivester Rees, Ph.D. Program Manager