Definition
Subsidence is the motion of the Earth’s surface as it shifts downward, relative to sea-level. Land subsidence, the loss of surface elevation due to the removal of subsurface support, ranges from broad, regional lowering of the land surface to localized collapse. Subsidence is the settlement of organic soils or of saturated mineral soils of very low density. In the New Orleans area, subsidence occurs for several reasons at different layers beneath the surface. Deep subsidence is caused by the shifting of faults and by the dewatering and consolidation of relatively young rock. Shallow subsidence generally results from either desiccation and shrinkage, or oxidation of organic material, or both, following drainage. Subsidence takes place gradually, usually over a period of years.
Human developments have changed the hydrology of southeast Louisiana in ways that contribute to coastal land loss. These changes include constructing canals and roads through wetlands and controlling the Mississippi River to prevent floods and aid navigation. These changes to the hydrology of south Louisiana have reduced the supply of new sediment to offset the impacts of subsidence on coastal wetland loss. River deltas naturally undergo accretion and subsidence. Accretion is the process by which sediments accumulate through the flooding of the banks and natural levees. Subsidence occurs as these sediments compact over time. Prior to the 20th Century, the accretion process equaled or exceeded the subsidence process in the Mississippi River Delta. However, the creation of flood-protection levees along the Mississippi River has reduced sediment supply in recent decades. Thus, there is nothing to counteract the natural subsidence that occurs in this area, which leads to an overall loss of elevation and causes coastal land loss.
In the United States, the average annual damage from all types of subsidence is estimated conservatively to be at least $125 million. Cities where cumulative damage from subsidence exceeds $100 million, include Long Beach, California; Houston, Texas; and Orleans and Jefferson Parishes, Louisiana.
Location and Extent of the Subsidence Hazard
The Mississippi River Delta Basin in southeastern Louisiana, including New Orleans, is characterized by relatively high rates of land subsidence. The subsidence of the land surface in the New Orleans region is mainly attributable to the drainage and oxidation of organic soils, aquifer- system compaction related to groundwater withdrawals, natural compaction, and dewatering of surface sediments. As mentioned above, the problem is exacerbated as a result of flood-protection measures and disruption of natural drainage paths that reduce sediment deposition in the New Orleans area. Higher land subsidence rates in the Parish can be found where former marshland has been built upon by buildings, roads, and levee causeways. Figures 35 and 36 also show that higher subsidence rates are found along the Mississippi River levee area and the south shoreline of Lake Pontchartrain. While rates are variable across space and time, the entire region is subject to subsidence.[1]
Severity of Subsidence
The severity of land subsidence has no generally established measure, except that it can be described in terms of the rate of change in ground elevation relative to sea level. Land subsidence occurs slowly and continuously over time or on abrupt occasions, as in the case of sudden formation of sinkholes. Procedures for determining the probability or frequency of land subsidence have not been established.
The sinking problem in Louisiana, as a result of subsidence, has been estimated anywhere from 6 to 20 inches over the past 20 years, depending on location. This necessitates maintenance to address resulting infrastructure problems. Subsidence continues to be a problem for the Greater New Orleans area, including all of New Orleans. Most of these areas are built on the Mississippi River silt, and the silt is slowly settling and compacting. Houses not built on deep pilings are experiencing differential settlement and cracking. Subsidence is also responsible for infrastructure problems, including ruptured water and sewer lines. However, it is coastal subsidence that poses the greatest threat to New Orleans. Loss of landmass makes the City more vulnerable to the effects of hurricanes, including high winds and storm surge. See pages (80-87) for a detailed description of the coastal erosion hazard.
In New Orleans, higher rates of subsidence are found in areas that had once been marshland and had been developed into buildings, roads, and levee causeways. A 2006 study used satellite radar data to determine the subsidence rates from 2002 to 2005. The average rate of absolute subsidence across the city of New Orleans was 0.2 inches +/- 0.1 inches (5.6 mm +/- 2.5 mm) per year. Higher rates of subsidence were found in the Lakeview region along the southern shores of Lake Pontchartrain, and parts of New Orleans were subsiding at more than 0.8 inches (20 mm) per year, including locations along the levee system that bounds the MRGO. The study also determined that a number of the levee breaches that occurred as a result of Katrina corresponded with the locations of some of the highest rates of subsidence.
Figure 35 shows subsidence rates in New Orleans, as measured by NASA. Subsidence values are established by measuring the motion of land away from NASA’s satellite. Negative values indicate motion away from the satellite, consistent with subsidence. Red indicates the areas of highest subsidence rates, up to over an inch (28.6 millimeters) each year. Blue indicates the areas of least subsidence. This graphic shows that the extent of the subsidence hazard is across the entire planning area.
Figure 35: Subsidence Rates (mm/year) in New Orleans and Vicinity
Source: National Aeronautics and Space Administration, Earth Observatory, May 2016
Figure 36: Subsidence Rates (mm/year) in New Orleans and Vicinity
Source: National Aeronautics and Space Administration, Earth Observatory, May 2016
Figure 37: Range of observed subsidence rates used by CPRA for the Coastal Master Plan
Source: Coastal Protection and Restoration Authority 2017, City of New Orleans
The subsidence and soils maps indicate a moderate correlation between soil type and subsidence rates. The highest subsidence rates are on Urban land, followed by Aquents and Allemands soils. Westwego clay is also in many of the intermediate- to high-subsidence rate areas. The slowest subsidence rates are found in Harahan clay, Commerce, and Sharkey soils. Efforts continue to be made to combat subsidence by reducing the amount of impervious surfaces in the city. Several local non-profits are working to help residents convert front yards into permeable surfaces, and City, through its CZO requirements, is increasing the inclusion of permeable open space and permeable paving in new developments.
The table below provides a list of soil types located in Orleans Parish. Note that cells with an asterisk were fields left blank and omitted from the source table.
Table 30: Orleans Parish Soil Types
| Map Symbol |
Soil Name |
Depth (inches) |
% Clay |
% Organic Matter |
| Ae |
Allemands
Muck, drained |
0-6
6-30
30-46
46-60 |
--
--
60-95
20-95 |
30-85 for Surface layer only |
| An, AT |
Aquents dredged |
|
|
|
| CE |
Clovelly muck |
0-31
31-72 |
--
50-90 |
30-60 surface… |
| Cm |
(Commerce)
Cancienne silt
loam |
0-5
5-33
33-60 |
14-27
14-39
14-39 |
.5-4 surface… |
| Co |
(Commerce)
Cancienne silty
clay loam |
0-4
4-32
32-60 |
27-39
14-39
14-39 |
.5-4 surface… |
| CS |
(Commerce)
Cancienne and
Schriever |
0-5
5-29
29-60 |
14-27
14-39
14-39 |
.5-4 surface… |
| GE |
Gentilly muck |
0-10
10-40
40-80 |
45-90
60-95
60-95 |
-- |
| Ha |
Harahan clay |
0-6
6-36
36-72 |
50-95
60-95
60-95 |
2-25 surface… |
| Ke |
Kenner muck drained |
0-36
36-40
40-75 |
--
45-85
-- |
30-60 surface… |
| LF |
Lafitte muck |
0-75
75-90 |
--
60-90 |
30-70 surface… |
| Sh |
(Sharkey)
Schriever silty |
0-5
5-24 |
27-35
60-90 |
.5-4 surface |
| |
clay loam |
24-60 |
25-39 |
|
| Sk |
(Sharkey)
Schriever clay |
0-5
5-37
37-60 |
40-60
60-90
25-39 |
.5-4 surface… |
| Ww |
Westwego
clay |
0-29
29-38
38-70 |
50-95
60-90
60-95 |
2-25 surface… |
Source: USDA Soil Survey
Figure 38: Soil Types in New Orleans
Source: USDA Soil Survey
Occurrences of Subsidence
Most of the land surface within the New Orleans Metropolitan Statistical Area, a region that includes all or parts of seven parishes, is sinking or “subsiding” relative to mean sea level. This is an ongoing occurrence, and, therefore, it is difficult to identify specific occurrences of the land subsidence hazard. Although no specific cases are presented in this subsection, it is possible to characterize subsidence rates over the years. Given the virtually continuous nature of this hazard, there is assumed to be a 100% annual statistical probability of occurrence. However, there are variations from year to year in the exact degree of subsidence.
Assuming that historical subsidence rates are a reasonable indicator of future trends, the risk from subsidence will continue to threaten property in New Orleans. Since subsidence is an ongoing occurrence, it has a 100% annual probability. Although subsidence by itself has the potential to negatively affect infrastructure, operations, and the general population of the Parish, a more significant effect of subsidence is that it potentially exacerbates the effects of other hazards. Subsidence not only results in lower ground elevations (and hence more damage when floods occur) but can: (a) damage elements in the Hurricane Protection System; (b) reduce the elevations of levees and other flood control structures, making it more likely surge will overtop them; and (c) lower coastal elevations, with a resulting loss of some of surge attenuation effects, meaning that surges may be more likely to reach farther inland.
Hazard Impacts
Impact on Life and Property
The costs associated with structural damage due to differential subsidence caused by drainage of organic soils appear to be high. Increased flooding is the most severe problem associated with organic soil subsidence.
Losses from natural sediment compaction, particularly in the Mississippi River Delta, are difficult to estimate because of the uncertain value of coastal wetlands. Increased flooding potential is the principal impact because affected areas commonly are low lying and naturally subject to flooding. Annual revenue losses are estimated in the order of millions of dollars. For example, collapsible soils added more than $2.5 million in mitigation costs to interstate highway construction in Louisiana. The two states with the highest damage caused by land subsidence are California and Louisiana.
Land subsidence can undermine the integrity of the levee system, potentially leading to levee failure. In New Orleans, land subsidence has caused extensive damage to roads and drainage systems, which can cause increased flooding, and increases long-term infrastructure maintenance costs.
Land subsidence is an ongoing problem in New Orleans. While the effects on property in the New Orleans metropolitan area can be significant, subsidence is generally a creeping hazard, one with chronic, not acute impacts. Subsidence is a constant process that cannot be easily mitigated through comprehensive mitigation actions. Subsidence problems are generally addressed on an individual basis as problems are discovered.
The Urban Water Plan outlines a vision to address the subsidence hazard by storing stormwater in the landscape to encourage infiltration into the soil in order to prevent soil oxidation and compaction. This strategy is primarily implemented on a system-scale through the urban water management strategies of the City of New Orleans and SWBNO. The HANO, NORA and Tulane University contribute to implementation of these strategies through implementing parcel-scale stormwater management and green infrastructure projects on their respective properties.
Vulnerability
The City of New Orleans considers subsidence as a separate and distinct natural hazard, but the city’s vulnerability to the effects of subsidence is relatively low. Subsidence negatively impacts roadways, and water and sewer infrastructure, increasing maintenance costs and probability of service interruptions. Subsidence damage to buildings, including residential, commercial, and public buildings, can increase initial construction costs as well as long-term maintenance needs. It is important to note that, although subsidence itself does not pose a high threat to New Orleans, the impacts of subsidence, lowering ground elevations relative to sea level exacerbates flood and storm vulnerabilities.[2] This is especially true in areas that are experiencing higher rates of subsidence, leading to greater vulnerability. The studies of flood risk and vulnerabilities in southern Louisiana that were used to inform this risk assessment incorporate various scenarios of coastal erosion, subsidence, and storm surge to characterize potential losses. For a list of vulnerable critical facilities please see Appendix C.
[1] Shallow Subsidence Vulnerability in New Orleans by Deltares and the City of New Orleans (2020)
[2] Subsidence and Sea-Level Rise 1n Southeast Louisiana: Implications for Coastal Management and Restoration Retrieved December 17, 2020, from https://pubs.usgs.gov/of/2000/0132/report.pdf
Relevant Actions
Hazard:
Flooding, Tropical Cyclones, Infrastructure Failure, Coastal Erosion, Subsidence |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
5-10 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Department of Public Works), SWBNO |
Support Agencies:
|
Cost:
$2,000,000,000+ |
Funding source:
FEMA, Army Corps of Engineers, City of New Orleans Capital Improvements |
Emergency Support Function:
ESF 3 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Infrastructure Failure, Coastal Erosion, Subsidence |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
5-10 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Capital Projects) |
Support Agencies:
|
Cost:
4600000 |
Funding source:
FEMA, Army Corps of Engineers, City of New Orleans Capital Improvements |
Emergency Support Function:
ESF 3 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
5-10 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Department of Public Works) |
Support Agencies:
|
Cost:
1250000 |
Funding source:
FEMA, HUD, Private Sector, City of New Orleans Capital Improvements |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Department of Public Works) |
Support Agencies:
|
Cost:
staff time |
Funding source:
Staff time |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Infrastructure Failure, Coastal Erosion, Subsidence |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
Staff time |
Funding source:
Staff time |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure (levee failure) |
Goal:
Goal 3: Reduce risk and vulnerability to the natural environment including wetland restoration and recognition of New Orleans as a coastal city. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Office of Reslience & Sustainability), Tulane University Center for Environmental Law |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 3: Reduce risk and vulnerability to the natural environment including wetland restoration and recognition of New Orleans as a coastal city. |
Status:
|
Timeframe:
5-10 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
4500000 |
Funding source:
FEMA, EPA, State Capital Oulay, Private Sector |
Emergency Support Function:
ESF 11 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 3: Reduce risk and vulnerability to the natural environment including wetland restoration and recognition of New Orleans as a coastal city. |
Status:
|
Timeframe:
5-10 years |
Priority:
Low |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
3500000 |
Funding source:
FEMA, EPA, State Capital Oulay, Private Sector |
Emergency Support Function:
ESF 11 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 3: Reduce risk and vulnerability to the natural environment including wetland restoration and recognition of New Orleans as a coastal city. |
Status:
|
Timeframe:
5-10 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
17500000 |
Funding source:
FEMA, State Capital Outlay, Private Sector, EPA |
Emergency Support Function:
ESF 11 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
225000 |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes, Storm Surge |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes, Thunderstorms |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Low |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes, Thunderstorms |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Low |
2015 Priority:
High |
|
Lead Agencies:
CNO (Safety & Permits) |
Support Agencies:
|
Cost:
100000 |
Funding source:
City of New Orleans, FEMA |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Office of Community Development) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
City of New Orleans, FEMA |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Infrastructure Failure , Coastal Erosion, Tornadoes, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness, Property Management, Safety & Permits) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
3-5 years |
Priority:
Medium |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
1090000000 |
Funding source:
HUD, FEMA, State of Louisiana |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Levee Failure |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
3-5 years |
Priority:
High |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness), Tulane University Planning Office |
Support Agencies:
|
Cost:
4000000000 |
Funding source:
HUD, FEMA, State of Louisiana, Private Sector |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-5 years |
Priority:
Low |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness), SWBNO |
Support Agencies:
|
Cost:
Staff Time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
Medium |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Infrastructure Failure, Coastal Erosion, Subsidence |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
5-10 years |
Priority:
Med+G95:P98ium |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
$2,000,000,000+ |
Funding source:
FEMA, Army Corps of Engineers, City of New Orleans Capital Improvements |
Emergency Support Function:
ESF 3 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City staff time |
Funding source:
CNO General Fund |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes, Extreme Heat |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
High |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
$250,000- $800,000 per site |
Funding source:
City of New Orleans Capital Improvements, FEMA, Sewage and Water Board, Private Sector |
Emergency Support Function:
ESF 12 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
Low |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
250000 |
Funding source:
City of New Orleans, FEMA |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Extreme Heat, Subsidence, Coastal Erosion, Infectious Disease Outbreak |
Goal:
Goal 1: Reduce risk and vulnerability to the human environment including cultural resources, homeowners, renters, visitors, and transient populations. |
Status:
|
Timeframe:
1-3 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 14 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tornadoes, Tropical Cyclones, Coastal Erosion, Subsidence, Severe Thunderstorms, Extreme Heat, Winter Weather |
Goal:
Goal 1: Reduce risk and vulnerability to the human environment including cultural resources, homeowners, renters, visitors, and transient populations. |
Status:
|
Timeframe:
1-3 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 14 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-2 years |
Priority:
Low |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Civil Service) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, State and Federal Grants |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Subsidence, Winter Weather, Coastal Erosion, Infectious Disease Outbreak, Active Threats, Infrastructure Failure, Hazardous Materials, Economic Shock |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
3-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
City capital bond funds, GOMESA, CDBG, CDBG-NDR, Sewerage and Water Board, State capital outlay, FHWA, FEMA-HMGP, US Army Corps of Engineers, FEMA |
Emergency Support Function:
ESF 1, ESF 3 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tornadoes, Tropical Cyclones Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Community Development) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
GOMESA, CPRA, CWPPRA, Sewerage and Water Board |
Emergency Support Function:
ESF 1, ESF 3 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-2 years |
Priority:
High |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Department of Public Works, Parks and Parkways) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 3, ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Subsidence, Winter Weather, Coastal Erosion, Infectious Disease Outbreak, Active Threats, Infrastructure Failure, Hazardous Materials, Economic Shock |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
High |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 15 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Tropical Cyclones, Coastal Erosion, Subsidence, Severe Thunderstorms, Extreme Heat, Winter Weather |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Coastal Erosion, Tropical Cyclones, Subsidence |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
3 to 5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
Philanthropy, School Board |
Emergency Support Function:
ESF 15 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Subsidence, Winter Weather, Coastal Erosion, Infectious Disease Outbreak, Active Threats, Infrastructure Failure, Hazardous Materials, Economic Shock |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
State and Federal Grants |
Emergency Support Function:
ESF 5, ESF 7 |
Comment on this action item
Hazard:
Flooding, Storm Surge, Coastal Erosion, Tropical Cyclones, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-2 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Information Technology & Innovation) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
EPA, US Army Corps of Engineers, FEMA-HMGP |
Emergency Support Function:
ESF 8 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
SWBNO |
Support Agencies:
|
Cost:
Staff Time, Contract Labor |
Funding source:
EPA, US Army Corps of Engineers, FEMA-HMGP |
Emergency Support Function:
ESF 8 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
NORA |
Support Agencies:
|
Cost:
Staff Time, Contract Labor |
Funding source:
EPA, US Army Corps of Engineers, FEMA-HMGP |
Emergency Support Function:
ESF 8 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
HANO |
Support Agencies:
|
Cost:
Staff Time, Contract Labor |
Funding source:
EPA, US Army Corps of Engineers, FEMA-HMGP |
Emergency Support Function:
ESF 8 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
4-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
Tulane University |
Support Agencies:
|
Cost:
Staff Time, Contract Labor |
Funding source:
EPA, US Army Corps of Engineers, FEMA-HMGP |
Emergency Support Function:
ESF 8 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Winter Weather, Coastal Erosion, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1-2 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability) |
Support Agencies:
|
Cost:
City Staff Time, Contract Labor |
Funding source:
Health and Human Services, CDC, EPA |
Emergency Support Function:
ESF 8, ESF 6 |
Comment on this action item
Hazard:
Flooding, Subsidence |
Goal:
Goal 5: To promote, implement, and sustain mitigation measures in Orleans Parish in order to reduce and manage risks to human life, the environment, and property. |
Status:
|
Timeframe:
1 to 3 years |
Priority:
High |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Homeland Security & Emergency Preparedness) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, HMGP |
Emergency Support Function:
ESF 5, ESF 14 |
Comment on this action item
Hazard:
Flooding, Tropical Cyclones, Coastal Erosion, Subsidence, Infrastructure Failure, Tornadoes, Storm Surge |
Goal:
Goal 4: Maximize the involvement of individuals, businesses, and groups in risk reduction measures through education/outreach on hazard mitigation appropriate to all groups, particularly vulnerable populations. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
NORA |
Support Agencies:
|
Cost:
Staff time |
Funding source:
TBD |
Emergency Support Function:
ESF 5 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Subsidence, Winter Weather, Coastal Erosion, Infectious Disease Outbreak, Active Threats, Infrastructure Failure, Hazardous Materials, Economic Shock |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
3-5 years |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
CNO (Office of Resilience & Sustainability, Neighborhood Engagement Office) |
Support Agencies:
|
Cost:
City Staff Time |
Funding source:
CNO General Fund, State and Federal Grants, Philanthropic Grants |
Emergency Support Function:
ESF 7, ESF 14 |
Comment on this action item
Hazard:
Flooding, Tornadoes, Tropical Cyclones, Severe Thunderstorms, Extreme Heat, Subsidence, Winter Weather, Coastal Erosion, Infectious Disease Outbreak, Active Threats, Infrastructure Failure, Hazardous Materials, Economic Shock |
Goal:
Goal 6: To protect Orleans Parish and the surrounding region from the effects of natural and manmade hazards, ensuring community continuity in the event of such hazards. |
Status:
|
Timeframe:
1-5 years |
Priority:
Medium |
2015 Priority:
|
|
Lead Agencies:
HANO |
Support Agencies:
|
Cost:
TBD |
Funding source:
TBD |
Emergency Support Function:
|
Comment on this action item
Hazard:
All |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure. |
Status:
|
Timeframe:
TBD |
Priority:
Medium |
2015 Priority:
N/A |
|
Lead Agencies:
SWBNO Emergency Mgmt |
Support Agencies:
|
Cost:
21000000 |
Funding source:
PDM/SWBNO |
Emergency Support Function:
ESF 6 |
Comment on this action item
Hazard:
Flooding,Storm Surge,Tropical Cyclones,Tornadoes,Subsidence,Winter Weather,Extreme Heat,Severe Thunderstorms |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure.
|
Status:
|
Timeframe:
On Going |
Priority:
High |
2015 Priority:
|
|
Lead Agencies:
Tulane University (Office of Risk Management) |
Support Agencies:
|
Cost:
Cost will be project specific |
Funding source:
GOHSEP; FEMA |
Emergency Support Function:
ESF 3 |
Comment on this action item
Hazard:
Flooding,Tropical Cyclones,Coastal Erosion,Tornadoes,Subsidence,Winter Weather,Extreme Heat,Severe Thunderstorms |
Goal:
Goal 2: Reduce risk and vulnerability to the built environment including current and future structures; critical facilities; historic structures; and infrastructure, including communications infrastructure.
|
Status:
|
Timeframe:
1 year |
Priority:
High |
2015 Priority:
|
|
Lead Agencies:
Tulane University (Office of Capital Projects and Real Estate) |
Support Agencies:
|
Cost:
Staff Time and Data Costs |
Funding source:
NOAA; USGS; NOAA; FEMA; TDEM; DOT; DHS; EPA; GOHSEP |
Emergency Support Function:
|
Comment on this action item
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