HURRICANE RITA SURGE INUNDATION AND ADVISORY BASE FLOOD ELEVATION MAPS – SUMMARY OF METHODS Version 1 – March 17, 2006 Completed Under Contract No. EMW-2000-CO-0247, Task Order 436 (Flood Data Analysis – Louisiana) Introduction On September 24, 2005, Hurricane Rita made landfall near the Louisiana-Texas border as a Category 3 hurricane, with maximum sustained winds of 120 miles per hour. Reaching Category 5 status while in the Gulf of Mexico but weakening before landfall, Hurricane Rita caused extensive coastal flooding, erosion, and wind damage. Sustained, hurricane-force winds extended more than 150 miles inland, and tropical storm-force winds reached the Arkansas-Louisiana-Texas border (National Oceanic and Atmospheric Administration [NOAA], http://www.ncdc.noaa.gov/oa/climate/research/2005/rita.html). Hurricane Rita produced storm surge of 5 to 14 feet, with maximum values observed approximately 60 miles east of the landfall site. The surge plus wave action caused widespread damage to infrastructure and buildings throughout low-lying coastal communities and inland parishes. The storm’s flooding impacts were not limited to the landfall area; surge of up to 8 feet was observed in New Orleans, breaching levees that had been provisionally repaired after Hurricane Katrina. As the storm moved inland and became a Tropical Storm, heavy rainfall also caused localized flooding (NOAA, http://www.ncdc.noaa.gov/oa/climate/research/2005/rita.html). In response to this devastating hurricane, the Federal Emergency Management Agency (FEMA) initiated a project to produce high-resolution maps that show flood impacts from the storm for portions of nine coastal Louisiana parishes: Calcasieu, Cameron, Iberia, Lafourche, St. Charles, St. John the Baptist, St. Mary, Terrebonne, and Vermilion. While flooding impacts from Hurricane Rita were also severe in Texas, recovery maps were only prepared for Louisiana because the observed coastal flooding was significantly greater than the flood levels shown on current Flood Insurance Rate Maps (FIRMs), suggesting that the FIRMs may understate the true flood risk. This report outlines the data sources and methods used to produce the Hurricane Rita Surge Inundation and Advisory Base Flood Elevation maps (herein referred to as the “Rita Recovery Maps”). As of the date of this report, Rita Recovery Maps have been published for the following parishes: Calcasieu; Cameron, Iberia; Lafourche; St. Charles (West Bank, or south of the Mississippi River); St. John the Baptist (West Bank, or south of the Mississippi River); St. Mary; Terrebonne; and Vermilion. 1. Methodology Rita Recovery Maps provide the following essential elements of information: * Preliminary surveyed coastal high water mark (HWM) flood elevations from Hurricane Rita’s storm surge (i.e., excluding HWMs reflecting surge plus local wave effects); * Hurricane Rita coastal surge inundation limits; and * Advisory Base Flood Elevations (ABFEs). The methods for generating each of these essential elements of information are discussed in greater detail in the sections that follow. In addition to the detailed Rita Recovery Map panels that show these elements, FEMA has also produced two overview maps for the nine affected parishes mapped to date. These overview maps, which are explained in greater detail in Section 3, shows some of the same essential elements as well as regional surge elevation contours derived from the surge-only HWMs. 1.1 Hurricane Rita Coastal High Water Mark Collection Under separate task orders, field-based flagger and survey crews from URS and URS Team subconsultants, ESP Associates, Michael Baker Jr., Inc., Dewberry, and BFM Consultants, Inc., were deployed to interview residents, find evidence of coastal high water levels, take digital photographs, and survey coastal HWMs from Hurricane Rita. Coastal HWMs included mud lines, water stains, debris, wrack lines, and eyewitness testimony. For each HWM, the flaggers completed a form that contained detailed information about the mark. To the extent possible, field crews noted the coastal flooding characteristics captured by the coastal HWM, including storm surge, wave runup, and wave height. These designations represent the field crew’s best estimate of this characteristic based on a combination of physical flood evidence and interviews with witnesses at the time of collection. These characteristics are described as follows: Surge - represents the rise in the normal water level, also called stillwater flooding Wave runup - represents the height of water rise above the stillwater level due to water rush up from a breaking wave Wave height - represents the coastal HWM elevation due to more direct wave action Typically, storm surge coastal HWMs are associated with a slow-rising flood that causes more water damage than structural damage. Wave height usually results in a higher elevation than just storm surge. All attempts were made to flag storm surge elevations, but in areas where storm surge characteristics were not obvious, wave runup or wave height may have been captured. For example, witnesses might claim the flooding was associated with a storm surge when in fact the flooding was from wave runup or riverine flooding. The survey crews followed the flaggers and used static Global Positioning System (GPS) methods to determine an accurate elevation for each coastal HWM. Since static GPS requires an area with no tree cover to return an accurate result, in some cases it was necessary to perform a short level loop survey from the GPS point to the coastal HWM. Coastal HWM locations were surveyed horizontally in the North American Datum of 1983 (NAD 83), Louisiana State Plane Coordinates (South Zone), and vertically in the North American Vertical Datum of 1988 (NAVD 88) US survey feet. Coastal HWM locations have been surveyed to within accuracies of ±0.25 foot vertically and ±10 feet horizontally, with a 95% confidence level. A more detailed discussion of the coastal HWM collection and final results is available on FEMA’s Hurricane Rita Recovery Mapping website at the following address: http://www.fema.gov/hazards/floods/recoverydata/pdf/rita_la_hwm_public.pdf 1.2 Hurricane Rita Storm Surge Inundation Mapping Flood inundation limits were created for the coastline for the Louisiana coastal parishes by mapping the coastal HWM elevations onto digital, pre-storm topographic data. These inundation limits represent the estimated inland extent of flooding caused by the Hurricane Rita storm surge. Note: Hurricane Katrina inundated many of the same Louisiana parishes in August 2005; areas where HWMs show that Katrina’s coastal flood levels exceeded those of Rita were mapped under a separate FEMA project. See FEMA’s Katrina Recovery Mapping website for more information: http://www.fema.gov/hazards/floods/recoverydata/katrina_la_index.shtm The HWMs surveyed by URS and its subconsultants were imported into a Geographic Information System (GIS) as points and pre-processed prior to analysis and mapping. The pre-processing of the HWMs included the Anselin Local Moran’s I statistical analysis to identify those points that did not match the general trend of elevations in each point’s immediate area. These HWMs were not used for the inundation mapping. In addition, HWMs identified as including wave effects or described to be of poor quality or have a low confidence were also excluded from the surge inundation mapping. Once the HWMs to be used were identified, a three-dimensional, raster surface was created using a standard interpolation function (Second Power Inverse Distance Weighting). In a parallel effort, a digital elevation model (DEM) was developed for this project using pre-Rita topographic data. The data were derived from Light Detection and Ranging (LIDAR) measurements collected in 2003 by 3001, Inc., a remote-sensing firm operating under subcontract to Watershed Concepts; this work was funded jointly by the State of Louisiana and FEMA. The LIDAR data were obtained for the recovery mapping effort from Atlas, the Louisiana statewide GIS (http://atlas.lsu.edu/). The LIDAR data have a posting interval of five meters, and are referenced to NAVD 88. To create the Hurricane Rita surge inundation limit, the interpolated HWM raster surface was intersected with the LIDAR DEM and then smoothed using PAEK smoothing algorithms. The inundation limit was then refined to remove small-scale, isolated areas of inundated and non-inundated terrain based on knowledge of overland surge propagation and engineering judgment. 1.3 Hurricane Rita Surge Elevation Contour Mapping Surge contours were mapped at one-foot intervals in the areas of the following parishes that were most severely flooded by Hurricane Rita: Calcasieu; Cameron; Iberia; Lafourche; St. Charles (West Bank); St. John the Baptist (West Bank); St. Mary; Terrebonne; and Vermilion. These contours, provided in one-foot increments, show the geographic variability of the storm’s surge. To create the contours, the coastal HWMs were examined to find patterns in the coastal storm surge as it pushed against the open coast and into the inland bays and waterways. The known path and landfall location of Hurricane Rita, together with the knowledge of how storm surge propagates inland, allowed surge contours to be drawn across the areas where the coastal HWMs indicate a change in storm surge elevation. Engineering judgment had to be applied in some locations to allow the contours to “step” up or down at one-foot intervals. Because of the inherent uncertainty in and the random and irregular spacing of coastal HWMs, the surge contours represent a generalized maximum storm surge elevation, and required professional judgment in their creation. Within certain surge contours, coastal HWMs may be higher or lower than the contours if they did not fit the overall pattern discerned from the coastal HWMs. Local wave effects (wave heights and wave runup), which increase the total water surface above the surge elevation, were not considered in this contouring effort. Coastal HWMs that include wave effects may be several feet higher than the surge contours in a particular area. Predictive numerical models of surge flooding, such as Hurricane Rita forecasts from the National Oceanic and Atmospheric Administration’s (NOAA’s) Sea, Lake and Overland Surge from Hurricane (SLOSH) computer model, were used qualitatively to help refine the surge contours in areas of complex topographic and bathymetric changes. NOAA will be developing hindcasts of Hurricane Rita’s surge in the coming months. Consequently, the results presented here should be viewed as preliminary and subject to update as additional data become available. 2.4 Hurricane Rita Advisory Base Flood Elevations ABFEs are advisory flood hazard data that may be used by communities as best-available data when FEMA determines that the existing, effective Flood Insurance Rate Maps (FIRMs) understate the true flood risk. The general approach for mapping the ABFEs is described below, followed by explanations of any parish-specific mapping techniques or zones where coastal engineering judgment had to be applied. As explained in the Flood Recovery Guidance published by FEMA for each Louisiana parish (http://www.fema.gov/hazards/floods/recoverydata/rita_la_resources.shtm), ABFEs for this project were generally determined by adding freeboard to the Base Flood Elevations (BFEs) shown on each community’s FIRM. To apply the freeboard specified in the Flood Recovery Guidance for each parish, the flood zone boundaries and elevations were first transferred electronically from the FIRM into a GIS format, where necessary. In the GIS, the specified freeboard value (usually one foot) was then added to the BFE, and the combined value was placed on the Recovery Map in the form of “ABFE” followed by the flood zone designation (e.g., “Zone VE”) and advisory elevation in feet (e.g., “ EL 11”). In some cases, FEMA mapped some formerly A and AE Zones as V or VE Zones, respectively, where the increased flood levels would make damaging waves possible. In addition to considering the FIRM data, ABFEs were determined wherever possible for Rita-inundated areas that were located outside of the 1%-annual-chance (100-year) floodplain (Zones B, C, or X) and approximate A Zone areas as shown on the effective FIRMs. Methods for developing ABFEs in each category of flood zone are described below: Zones B/C/X: ABFE determination in these areas fell into one of three possible scenarios: (1) ABFEs were assigned to Rita-inundated B/C/X Zones based on the effective BFEs of the adjacent flood zones from the FIRM, plus one foot of freeboard. For example, if a specific area delineated on the FIRM had a BFE of AE 7, the same area would be mapped on the Rita Recovery Map with an ABFE of AE 8. If the Rita inundation extended farther inland into adjacent B/C/X Zones on the FIRM, those inundated areas would be included in the Rita Recovery Map advisory floodplain as a Zone A area, and be assigned an ABFE of 8, consistent with the neighboring AE 8. (2) In cases where the adjacent flood zone on the effective FIRM was an approximate Zone A instead of a detailed AE Zone, the Rita-inundated Zone B/C/X area and the Zone A were merged, and the combined area was assigned an ABFE based on engineering judgment or other data (see next section on Zone As). For example, a merged B/C/X Zone and an approximate A Zone could be mapped as one advisory flood zone with an ABFE of A 5. (3) In some instances, an adjacent detailed flood zone’s ABFE could not be applied to the entire extent of the B/C/X Zone that had been inundated by Hurricane Rita; this occurred wherever the Rita surge height was significantly higher (>2 feet) than the prevailing ABFE for the area. For example, consider a recovery map panel where the estimated Rita surge elevation was 10-11 feet (NAVD 88) and the prevailing ABFEs are AE 8 and A 8. Here, FEMA would refrain from over-extending the advisory floodplain (specifically, the A 8 flood zone) to cover the entire Rita-inundated area, since it is apparent that Rita’s flooding was much more severe than what would be expected in a 1%-annual-chance (100-year) event in this location. In these areas, FEMA used the high-resolution topographic data to place a more reasonable floodplain limit (that is, the landward limit of the advisory Zone A) where the ground elevation equaled the elevation of closest detailed ABFE (8 feet, in the above example). Zone A: ABFEs in these areas were primarily based on BFEs provided by the U.S. Army Corps of Engineers (USACE), New Orleans District. The USACE calculated these BFEs during flood control projects, and these values are accepted by the local communities for flood management purposes. The BFEs are tabulated for each parish in the following subsections, including the project identification number, latitude, longitude, assigned date, effective FIRM panel number, and BFE (in feet, NAVD88). The modeled Rita surge height and the BFEs of adjacent, detailed flood zones on the effective FIRMs were also considered when assigning values to approximate Zone A areas. All elevation values are relative to NAVD88 and rounded to the nearest half-foot increment. Rita Recovery Map users should note the following: A thick yellow line labeled, “Limit of ABFEs,” marks the end of the advisory floodplain, that is, the land area where the coastal-related ABFEs apply. ABFEs were not mapped in areas where riverine BFEs shown on the FIRMs are greater than the advisory coastal elevations, nor were ABFEs mapped in locations where there were insufficient technical data to support development of a reasonable, defensible elevations. In most of these cases, the Rita Recovery Maps will show a yellow and black “Limit of Coastal ABFEs” line, and any Rita-inundated areas excluded from the ABFE mapping will be labeled with “See Effective FIRM.” Map users should consult the effective FIRM for the area for flood elevations that should be used during the recovery process. Parish-Specific Approaches – Calcasieu Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. All Zone A areas in Calcasieu Parish were assigned advisory elevations based on the surrounding effective flood zones. In riverine flooding areas, the advisory elevations were applied to riverine BFEs (plus 1 foot of freeboard) until the Rita surge height was equal to the riverine BFE. When the riverine BFE equaled the Rita surge height, the ABFEs were carried to the furthest spatial extent of that BFE (based on topography) and assigned that value. Above this extent, riverine flooding is dominant; these areas are bounded by a yellow and black line labeled “Limit of Coastal ABFEs.” USACE BFEs are tabulated below (Table 1) for reference only, as USACE elevations were not used for assigning A zone elevations in Calcasieu Parish. Table 1. USACE BFE data for Calcasieu Parish Project ID: 693 Latitude:30.312798 Longitude: -93.35509269 FIRM Panel:220037 0225D Assigned Date:9/6/2000 BFE: 19.0 Project ID:707 Latitude:30.147721 Longitude: -93.46801682 FIRM Panel: 220037 0350C Assigned Date: 11/3/2000 BFE: 10.0 Project ID: 750 Latitude: 30.193857 Longitude: -93.11462231 FIRM Panel: 220037 0425B Assigned Date: 6/12/2000 BFE: 18.0 Project ID: 851 Latitude:30.188449 Longitude: -93.12861508 FIRM Panel: 220037 400 Assigned Date: 2/24/2000 BFE: 20.0 Project ID: 856 Latitude: 30.386336 Longitude: -93.59475946 FIRM Panel: 220037 50B Assigned Date: 2/3/2000 BFE: 42.0 Project ID: 860 Latitude: 30.161317 Longitude: -93.19016614 FIRM Panel: 220037 400 Assigned Date: 1/28/2000 BFE: 15.0 Project ID: 862 Latitude: 30.1413 Longitude: -93.43572217 FIRM Panel: 22037 0350 Assigned Date: 9/30/1999 BFE: 9.0 Project ID: 878 Latitude: 30.401857 Longitude: -93.13323516 FIRM Panel: 22037 0125C Assigned Date: 9/24/1999 BFE: 24.0 Project ID: 896 Latitude: 30.204825 Longitude: -93.3867361 FIRM Panel: 220037 0350D Assigned Date: 9/1/1999 BFE: 12.0 Project ID: 921 Latitude: 30.311924 Longitude: -93.35053196 FIRM Panel: 220037 225 Assigned Date: 4/22/1999 BFE: 19.0 Project ID: 994 Latitude: 30.210548 Longitude: -93.13162926 FIRM Panel: 220037 400 Assigned Date: 8/20/1999 BFE: 17.0 Project ID:995 Latitude: 30.20544 Longitude: -93.12515537 FIRM Panel: 220037 400 Assigned Date: 8/19/1999 BFE: 17.0 Project ID: 1235 Latitude: 30.176387 Longitude: -93.19716358 FIRM Panel: 220040 0010D Assigned Date: 4/25/2002 BFE: 16.0 Project ID: 1282 Latitude: 30.195085 Longitude: -93.38308824 FIRM Panel: 220037 0350C Assigned Date: 1/19/1999 BFE: Project ID: 1314 Latitude: 30.195436 Longitude: -93.38312725 FIRM Panel: 220037 0350C Assigned Date: 1/8/1999 BFE: 11.5 Project ID:1373 Latitude:30.176817 Longitude:-93.26459404 FIRM Panel:220040 0010D Assigned Date:11/20/1998 BFE: 9.0 Project ID:1469 Latitude:30.393705 Longitude:-93.15201331 FIRM Panel: 220037 125 Assigned Date: 5/28/1998 BFE: 25.0 Project ID: 1486 Latitude:30.401772 Longitude: -93.33326571 FIRM Panel: 220037 100 Assigned Date:4/29/1998 BFE: 29.0 Project ID:1545 Latitude:30.313107 Longitude:-93.35555576 FIRM Panel: 220037 225 Assigned Date:2/11/1998 BFE: 19.0 Project ID:1613 Latitude: 30.180062 Longitude:-93.26724626 FIRM Panel: 220040 0005 Assigned Date: 4/14/1998 BFE: 9.0 Project ID:1685 Latitude:30.19928 Longitude:-93.58605643 FIRM Panel:220042 Assigned Date: 8/25/1997 BFE: 15.0 Project ID: 1692 Latitude: 30.21386 Longitude:-93.19539565 FIRM Panel:220037 10 Assigned Date: 8/15/1997 BFE: 14.0 Project ID: 1698 Latitude: 30.258965 Longitude:-93.47878076 FIRM Panel: 220037 Assigned Date:8/12/1997 BFE: 18.0 Project ID:1783 Latitude: 30.315834 Longitude:-93.3467974 FIRM Panel:2 220037 0225 Assigned Date:5/19/1997 BFE: 19.0 Project ID: 1800 Latitude:30.208098 Longitude:-93.12892194 FIRM Panel:220037 0400C Assigned Date:2/27/1997 BFE: 17.0 Project ID:1933 Latitude:30.152893 Longitude:-93.17850327 FIRM Panel:220037 0400C Assigned Date:7/22/1996 BFE: 15.0 Project ID: 1981 Latitude:30.393909 Longitude:-93.33973153 FIRM Panel: 220037 0100C Assigned Date: 7/24/2002 BFE: 28.0 Project ID:2243 Latitude:30.328519 Longitude:-93.12840071 FIRM Panel: 220037 0250B Assigned Date:4/25/1995 BFE: 15.0 Project ID: 2248 Latitude: 30.184613 Longitude:-93.37533441 FIRM Panel: 220037 0350C Assigned Date:8/7/2002 BFE: 11.5 Project ID: 2352 Latitude:30.459204 Longitude:-93.44653531 FIRM Panel:220038 0005B Assigned Date:3/29/1995 BFE: 69.0 Project ID: 2353 Latitude: 30.460745 Longitude:-93.44557067 FIRM Panel:220038 0005B Assigned Date:3/29/1995 BFE: 66.0 Project ID:2558 Latitude:30.304733 Longitude:-93.07993119 FIRM Panel: 220037 0275C Assigned Date:10/30/2002 BFE: 16.0 Project ID:2740 Latitude:30.181745 Longitude:-93.20508692 FIRM Panel:220037 0010E Assigned Date: 2/28/2003 BFE: 15.0 Project ID:2892 Latitude: 30.176778 Longitude:-93.20039927 FIRM Panel: 220040 0010E Assigned Date: 5/20/2003 BFE: 14.0 Project ID:3283 Latitude:30.264116 Longitude:-93.28734076 FIRM Panel:220037 0225D Assigned Date:12/5/2003 BFE: 15.0 Project ID:3226 Latitude: 30.292531 Longitude:-93.09564557 FIRM Panel:220037 0275C Assigned Date: 10/16/2003 BFE: 15.0 Project ID:2784 Latitude:30.179357 Longitude: -93.19274119 FIRM Panel:220040 0010D Assigned Date:12/23/1993 BFE: 15.0 Project ID:3041 Latitude: 30.399357 Longitude: -93.18136154 FIRM Panel: 220037 0125C Assigned Date: 6/19/2003 BFE: 26.0 Project ID:2962 Latitude:30.454755 Longitude:-93.42397378 FIRM Panel:220037 00075 Assigned Date:8/17/1993 BFE: 58.5 Project ID:3423 Latitude:30.322894 Longitude:-93.33015604 FIRM Panel:220037 0225D Assigned Date: 3/18/2004 BFE: 20.0 Project ID:3151 Latitude:30.331518 Longitude: -93.36484499 FIRM Panel: 220037 0225D Assigned Date: 9/2/2003 BFE: 20.0 Project ID:3394 Latitude:30.38459 Longitude: -93.59609078 FIRM Panel: 220037 0050B Assigned Date:2/19/2004 BFE: 45.0 Project ID:3361 Latitude: 30.216703 Longitude:-93.22164058 FIRM Panel: 220040 0010E Assigned Date:1/31/2004 BFE: 9.0 Project ID:3582 Latitude: 30.177629 Longitude:-93.19999775 FIRM Panel: 220040 0010E Assigned Date: 6/28/2004 BFE: 15.0 Project ID:3443 Latitude:30.261366 Longitude:-93.36831617 FIRM Panel:220037 0225D Assigned Date:3/25/2004 BFE: 16.0 Project ID:3530 Latitude:30.207301 Longitude:-93.13332166 FIRM Panel: 220037 400D Assigned Date:5/18/2004 BFE: 17.0 Project ID:3532 Latitude:30.192053 Longitude:-93.12472462 FIRM Panel: 220037 425C Assigned Date:5/18/2004 BFE: 20.0 Project ID:3476 Latitude:30.314847 Longitude:-93.68170088 FIRM Panel:220037 0150C Assigned Date: 4/15/2004 BFE: 24.0 Project ID:3462 Latitude:30.302789 Longitude:-93.66448121 FIRM Panel: 220037 0150C Assigned Date:4/5/2004 BFE: 26.0 Project ID:4094 Latitude:30.211638 Longitude:-93.16855037 FIRM Panel: 220040 0010E Assigned Date:10/20/2005 BFE: 12.0 Project ID:4141 Latitude:30.144172 Longitude:-93.24737045 FIRM Panel:220037 0400C Assigned Date:12/13/2005 BFE: 13.0 Project ID:3878 Latitude:30.288916 Longitude: -93.11484418 FIRM Panel: 220037 0275C Assigned Date:2/14/2005 BFE: 14.0 Project ID: 3635 Latitude: 30.231851 Longitude:-93.37049616 FIRM Panel:220041 0001C Assigned Date: 7/27/2004 BFE: 14.0 Project ID:3629 Latitude:30.277208 Longitude:-93.09788931 FIRM Panel:220037 0275C Assigned Date: 7/23/2004 BFE: 15.0 Project ID:3725 Latitude: 30.334163 Longitude: -93.07954832 FIRM Panel: 220039 0275C Assigned Date:10/7/2004 BFE: 18.0 Project ID: 4145 Latitude:30.250783 Longitude:-93.40530342 FIRM Panel:220037 0200C Assigned Date:12/21/2005 BFE: 21.0 Project ID:4137 Latitude:30.166956 Longitude: -93.12776253 FIRM Panel:220037 0400D Assigned Date: 12/1/2005 BFE: 22.0 Parish-Specific Approaches – Cameron Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. All Zone A areas in Cameron Parish were assigned advisory elevations based on the surrounding effective flood zones, with the exception of panels EE 28-30 and FF 28-29. Elevations in A zones appearing on these panels (EL 7) were not ramped down to conform with the effective FIRM elevations because the Rita surge inundation was greater (8-9 feet) than the adjoining effective elevations (5-6 feet), and adjoining effective zones in Calcasieu Parish had higher effective elevations (AE Zones, 8 to 10 feet). USACE BFEs were not used to assign elevations to A Zone in Cameron Parish, but have been provided for reference purposes (Table 2). Table 2. USACE BFE data for Cameron Parish Project ID:1976 Latitude:30.028586 Longitude:-93.17358215 FIRM Panel:225194 0125F Assigned Date:4/18/1996 BFE:6.0 Project ID:2630 Latitude: 29.863822 Longitude:-92.84722283 FIRM Panel: 225194 0725F Assigned Date: 3/3/1994 BFE: 8.0 Parish-Specific Approaches – Iberia Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. For Zone A areas south of Bayou Teche, ABFE elevations were assigned based on a combination of effective AE elevations and USACE BFEs. USACE BFE elevations were superseded if effective elevations in adjacent AE or VE Zones were greater. This was the case in western Iberia, where USACE BFEs decreased from 12 to 10 feet; however, effective flood zones to the south had an elevation of 12 feet, as well as preliminary flood zone data in Vermilion Parish (to the west). ABFE elevations along Bayou Teche were assigned according to USACE BFEs, which increased from 7 to 11.5 from east to west. In the northeastern extent of the parish, ABFE elevations were ramped from 6 to 8 feet to conform to USACE BFE guidance (see Table 3). Table 3. USACE BFE data for Iberia Parish Project ID:722 Latitude: 29.969306 Longitude:-91.61393308 FIRM Panel: 220078 0150C Assigned Date:12/12/2000 BFE: 8.0 Project ID:1259 Latitude: 29.943828 Longitude:-91.63968047 FIRM Panel:220078 0150C Assigned Date:5/6/2002 BFE: 8.0 Project ID:1684 Latitude: 29.994942 Longitude: -91.79143432 FIRM Panel:220078 0150C Assigned Date:9/25/1997 BFE: 10.5 Project ID:1791 Latitude:29.965809 Longitude:-91.99206009 FIRM Panel:220078 0125C Assigned Date:5/5/1997 BFE: 10.0 Project ID:2001 Latitude:29.974933 Longitude:-91.81391282 FIRM Panel:220082 0005C Assigned Date:5/15/1996 BFE: 13.0 Project ID: 2249 Latitude: 29.920552 Longitude:-91.6685789 FIRM Panel:220080 0005B Assigned Date: 4/19/1995 BFE: 7.0 Project ID: 2369 Latitude: 29.974599 Longitude:-91.81575061 FIRM Panel:220078 0120C Assigned Date: 3/20/1995 BFE: 13.0 Project ID:2371 Latitude: 29.97118 Longitude:-91.81639487 FIRM Panel: 220078 0120C Assigned Date: 3/20/1995 BFE: 12.0 Project ID:2417 Latitude: 29.995949 Longitude:-91.79368683 FIRM Panel: 220078 Assigned Date:7/11/1994 BFE: 11.0 Project ID:2620 Latitude: 29.989846 Longitude:-91.7853811 FIRM Panel:220082 0005C Assigned Date: 4/26/1994 BFE:10.0 Project ID: 2644 Latitude:30.033915 Longitude:-91.82840061 FIRM Panel: 220082 0005C Assigned Date:3/9/1994 BFE: 15.5 Project ID:2646 Latitude:30.014503 Longitude:-91.80285132 FIRM Panel: 220082 0005C Assigned Date: 3/11/1994 BFE: 11.5 Project ID:2787 Latitude:30.023214 Longitude:-91.90297559 FIRM Panel:220078 0125C Assigned Date:3/17/2003 BFE: 12.0 Project ID:3294 Latitude:29.941678 Longitude:-91.79215697 FIRM Panel:220078 0150C Assigned Date:12/10/2003 BFE: 11.0 Project ID:3333 Latitude:30.007223 Longitude:-91.8183405 FIRM Panel: 220082 0005C Assigned Date: 1/21/2004 BFE: 11.5 Project ID:3707 Latitude:30.114447 Longitude:-91.72282402 FIRM Panel:220082 0050C Assigned Date:10/4/2004 BFE: 8.0 Parish-Specific Approaches – Lafourche Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. Within Lafourche Parish, values assigned to approximate Zone A areas differed. For areas northeast of Bayou Lafourche, Zone A areas were assigned a value of 5 feet from the Lafourche/Assumption Parish boundary to the town of Mathews. From Mathews to Larose, Zone A areas were assigned a value of 6 feet, in accordance with the USACE BFE data (see Table 4). To the southwest of Bayou Lafourche, all approximate Zone A areas were assigned a value of 6 feet. All assigned values were based on averaged USACE BFE guidance for Lafourche Parish. Table 4. USACE BFE data for Lafourche Parish Project ID:915 Latitude: 29.746077 Longitude:-90.74345898 FIRM Panel: 225202 280 Assigned Date:4/28/1999 BFE: 6.0 Project ID:963 Latitude:29.632628 Longitude: -90.59887881 FIRM Panel:225202 315 Assigned Date: 6/3/1999 BFE: 5.0 Project ID:1020 Latitude: 29.760061 Longitude: -90.90796608 FIRM Panel: 225202 120 Assigned Date:12/17/1998 BFE: 6.0 Project ID:1075 Latitude:29.706991 Longitude:-90.4541796 FIRM Panel: 225202 0330C Assigned Date:2/14/2002 BFE: 6.0 Project ID:1075 Latitude:29.7286 Longitude:-90.46231703 FIRM Panel:225202 0330C Assigned Date:2/14/2002 BFE: 6.0 Project ID:1085 Latitude: 29.575723 Longitude:-90.49079804 FIRM Panel:225202 0455C Assigned Date: 2/19/2002 BFE: 6.0 Project ID:1085 Latitude:29.572314 Longitude:-90.47848193 FIRM Panel:225202 0455C Assigned Date:2/19/2002 BFE: 6.0 Project ID:1085 Latitude:29.571215 Longitude:-90.47375342 FIRM Panel: 225202 0455C Assigned Date:2/19/2002 BFE: 6.0 Project ID: 1114 Latitude: 29.706505 Longitude:-90.73337325 FIRM Panel: 225202 280 Assigned Date:2/27/2002 BFE: 6.0 Project ID:1163 Latitude: 29.68351 Longitude:-90.51309466 FIRM Panel: 225202 0320C Assigned Date:3/23/1999 BFE: 5.0 Project ID: 1331 Latitude: 29.760656 Longitude:-90.90764907 FIRM Panel: 225202 0120C Assigned Date:12/17/1998 BFE: 6.0 Project ID:1367 Latitude:29.687306 Longitude:-90.64535679 FIRM Panel: 225202 295 Assigned Date:10/13/1998 BFE: 6.0 Project ID: 1379 Latitude: 29.715949 Longitude:-90.61141769 FIRM Panel:225202 305 Assigned Date:9/22/1998 BFE: 5.0 Project ID:1383 Latitude:29.603075 Longitude:-90.39655269 FIRM Panel:225202 0460C Assigned Date:11/19/1998 BFE: 6.0 Project ID:1390 Latitude:29.874438 Longitude: -90.82445109 FIRM Panel:225202 130 Assigned Date: 9/10/1998 BFE: 5.0 Project ID:1498 Latitude:29.85594 Longitude:-90.65253781 FIRM Panel:225202 160 Assigned Date:3/30/1998 BFE:4.0 Project ID:1561 Latitude:29.606091 Longitude:-90.6362389 FIRM Panel:225202 425 Assigned Date: 3/10/1998 BFE: 5.5 Project ID: 1680 Latitude:29.709466 Longitude:-90.48332651 FIRM Panel:225202 330 Assigned Date: 10/1/1997 BFE: 4.0 Project ID:1778 Latitude:29.543325 Longitude:-90.40468204 FIRM Panel: 220105 47 Assigned Date:0 3/20/1997 BFE: 7.5 Project ID:1936 Latitude: 29.55918 Longitude:-90.5697986 FIRM Panel:225202 0440C Assigned Date:7/19/1996 BFE: 6.0 Project ID:2191 Latitude: 29.780264 Longitude:-90.52293359 FIRM Panel: 225202 200 Assigned Date: 8/9/1995 BFE: 4.0 Project ID:2930 Latitude: 29.748662 Longitude:-90.64814739 FIRM Panel:225202 0285C Assigned Date:10/19/1993 BFE: 4.0 Project ID:2711 Latitude: 29.880356 Longitude:-90.73204751 FIRM Panel:225202 0065C Assigned Date:2/3/2003 BFE: 4.0 Project ID:3250 Latitude: 29.684049 Longitude: -90.64785256 FIRM Panel:225202 0295C Assigned Date:11/18/2003 BFE: 6.0 Parish-Specific Approaches – St. Charles Parish (West Bank): As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. For St. Charles Parish, all approximate A Zones were assigned an ABFE of 5 feet. The USACE BFEs located within the Rita inundation area were 4 feet (see Table 5). The ABFE was raised from 4 feet to 5 feet in consideration of the Rita surge height achieved in the area, the adjacent effective FIRM BFEs, and the USACE BFEs for St. John the Baptist Parish. Table 5. USACE BFE data for St. Charles Parish Project ID:1587 Latitude:29.919920 Longitude:-90.375027 FIRM Panel:220160 0125C Assigned Date: 10/25/1997 BFE:4.0 Project ID:808 Latitude: 29.896306 Longitude:-90.381223 FIRM Panel:220160 0125C Assigned Date: 8/18/2000 BFE:4.0 Parish-Specific Approaches – St. John the Baptist Parish (West Bank): As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. For St. John the Baptist Parish, all approximate A Zones were assigned an ABFE of 5 feet. Although the USACE provides a BFE of 6.5 feet for this section of St. John the Baptist Parish, only a single value was available in the area of Rita surge inundation (see Table 6). A lower ABFE of 5 was assigned to this advisory flood zone in light of the modest Rita surge height in the area, and a USACE BFE collected in St. Charles Parish. Table 6. USACE BFE data for St. John the Baptist Parish Project ID:2991 Latitude: 29.914961 Longitude:-90.620162 FIRM Panel: 220164 0275C Assigned Date:7/22/1993 BFE: 6.5 Parish-Specific Approaches – St. Mary Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. Zone As south of Bayou Teche were assigned values based on adjacent Zone AE elevations. On panels Z70 and Z71, areas that were previously in the 0.2%-annual-chance (500-year) floodplain and shown as inundated by Rita were reclassified as V Zones based on the uniform 1-foot freeboard and the adjacent VE Zones. North of Bayou Teche, an ABFE elevation of 6 feet was assigned to A Zones east of panel BB75. USACE BFEs increase from 6 feet to 8 feet at the western extent of the parish (see Table 7). To conform to this increase, A Zone ABFE elevations were ramped from an elevation of 6 feet to an elevation of 8 feet between panels BB75 and BB74/CC74. Several areas in St. Mary parish were excluded from the ABFEs due to insufficient information to assign advisory elevations. Rita-inundated areas without advisory elevations are overlaid with a transparent blue layer with a dark blue outline. Many of these areas have riverine flooding elevations that are greater than coastal flooding. These areas are bounded with a yellow and black dashed line and labeled “Limit of Coastal ABFEs.” For St. Mary Parish, these areas include: 1) along the west Atchafalaya spillway to west of State Highway 70 at Morgan City; 2) the extent of the Lower Atchafalaya between Morgan City and Berwick; and 3) along Bayou Teche, throughout the parish. The southern half of Bayou Teche was not assigned ABFEs because the riverine BFEs are greater than the Rita inundation and greater than any estimates of 1%-annual-chance (100-year) coastal flood elevations in the vicinity. Table 7. USACE BFE data for St. Mary Parish Project ID:689 Latitude:29.859807 Longitude: -91.52747913 FIRM Panel:220192 0125C Assigned Date:8/28/2000 BFE: 9.0 Project ID:842 Latitude:29.721546 Longitude:-91.18973727 FIRM Panel:220196 0001D Assigned Date: 2/25/2000 BFE: 6.0 Project ID:877 Latitude:29.901394 Longitude:-91.52205131 FIRM Panel: 220192 0050B Assigned Date:10/4/1999 BFE: 6.0 Project ID: 960 Latitude:29.876926 Longitude:-91.55315792 FIRM Panel: 220192 50 Assigned Date:6/8/1999 BFE: 7.0 Project ID:986 Latitude:29.76242 Longitude:-91.39795731 FIRM Panel:220192 Assigned Date: 8/23/1999 BFE: 6.0 Project ID:987 Latitude:29.687377 Longitude:-91.10764936 FIRM Panel:220192 0175E Assigned Date:8/23/1999 BFE: 6.0 Project ID:1006 Latitude:29.931008 Longitude:-91.55118612 FIRM Panel:220192 Assigned Date:2/23/1999 BFE: 6.0 Project ID:1317 Latitude: 29.901413 Longitude:-91.52419436 FIRM Panel:220192 0050B Assigned Date: 1/7/1999 BFE: 6.0 Project ID:1355 Latitude: 29.678124 Longitude: -91.29123524 FIRM Panel: 220192 0150D Assigned Date: 10/22/1998 BFE: 5.0 Project ID:1366 Latitude: 29.902282 Longitude:-91.63619547 FIRM Panel:220192 0050B Assigned Date:10/8/1998 BFE: 7.0 Project ID:1438 Latitude:29.890925 Longitude:-91.52638892 FIRM Panel: 220192 125C Assigned Date: 7/17/1998 BFE: 7.0 Project ID:1539 Latitude: 29.854186 Longitude:-91.52994051 FIRM Panel: 220192 0001B Assigned Date:2/13/1998 BFE: 9.0 Project ID:1592 Latitude: 29.639979 Longitude: -91.10108632 FIRM Panel:220192 0175E Assigned Date:12/10/1997 BFE: 7.0 Project ID: 1639 Latitude: 29.889577 Longitude:-91.52479992 FIRM Panel: 220192 Assigned Date:11/12/1997 BFE: 7.0 Project ID:1699 Latitude: 29.75668 Longitude:-91.46205676 FIRM Panel:220192 0150D Assigned Date: 8/8/1997 BFE: 10.0 Project ID:1785 Latitude:29.877597 Longitude:-91.45554285 FIRM Panel:220192 0050B Assigned Date: 3/26/1997 BFE: 6.0 Project ID: 2051 Latitude: 29.699261 Longitude:-91.36891109 FIRM Panel:220192 Assigned Date: 2/13/1996 BFE: 5.0 Project ID:2246 Latitude:29.755542 Longitude: -91.39133942 FIRM Panel:220192 0150C Assigned Date: 4/7/1995 BFE: 6.0 Project ID:2263 Latitude: 29.73994 Longitude:-91.44196863 FIRM Panel:220192 250 Assigned Date: 3/21/1995 BFE: 9.0 Project ID:2319 Latitude:29.934154 Longitude: -91.55192351 FIRM Panel:220192 0050B Assigned Date: 10/14/1994 BFE: 6.0 Project ID: 2426 Latitude: 29.682411 Longitude: -91.1084897 FIRM Panel:220192 0175D Assigned Date: 5/2/1994 BFE: 6.0 Project ID:2974 Latitude:29.908348 Longitude:-91.53805018 FIRM Panel:220192 50B Assigned Date: 8/30/1993 BFE: 6.0 Project ID:2945 Latitude:29.770183 Longitude:-91.49117226 FIRM Panel: 220192 0125C Assigned Date: 9/7/1993 BFE: 9.0 Project ID:2945 Latitude:29.780383 Longitude:-91.50532489 FIRM Panel:220192 0125C Assigned Date:9/7/1993 BFE: 9.0 Project ID:2945 Latitude:29.784909 Longitude: -91.51762874 FIRM Panel:220192 0125C Assigned Date:9/7/1993 BFE: 9.0 Project ID:2913 Latitude:29.789735 Longitude: -91.51379799 FIRM Panel:220192 00125 Assigned Date:9/2/1993 BFE: 9.0 Parish-Specific Approaches – Terrebonne Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. Only a single USACE BFE point of reference (BFE of 8.0 feet) was available within Terrebonne Parish, located north of Dulac (see Table 8). Northeast of Bayou Terrebonne, Zone A elevations were assigned a value of 5 feet based on USACE BFEs in Lafourche Parish. West of Bayou Terrebonne, approximate Zone A elevations were decreased incrementally from a value of 8 feet to 6 feet from Dulac to Houma. All Zone A areas northwest of Houma to the Terrebonne/Assumption Parish boundary were assigned a value of 6 feet. This value was based on USACE BFEs in St. Mary Parish, as well as effective FIRM BFEs. Table 8. USACE BFE data for Terrebonne Parish Project ID:2573 Latitude:29.4725 Longitude: -90.70166 FIRM Panel: 225206 0290C Assigned Date:11/18/2002 BFE: 8.0 Parish-Specific Approaches – Vermilion Parish: As specified in the Flood Recovery Guidance, one foot of freeboard was applied to all detailed flood zones shown on the effective FIRM. Advisory elevations have also been determined in areas shown as approximate A Zones on the effective FIRMs. Zone As in the eastern extent of the parish were typically surrounded by AE or VE zones; values were assigned to these areas based on the adjacent Zone AE/VE elevations. On panels CC54-56 and DD56, Zone As were assigned an ABFE of 10 feet based on the average elevation of the surrounding zones (elevations of 9, 10, and 11 feet) and the existence of a Zone AE10 on panels CC/DD56. Effective gutters were extended on panels CC/DD50 and DD/EE47 to ramp ABFE elevations in approximate Zone As. ABFE elevations in the western extent of Vermilion parish were assigned based on a combination of USACE BFE values and adjacent effective FIRM elevations. ABFEs of EL 10 were assigned to panels FF47-50 and EE59 based on USACE BFEs of 10 feet. Gutters were added on panel FF47 to ramp ABFEs down from 10 feet to 7 feet to the south, and 9 feet to the west. ABFEs were ramped down to the west along the Vermilion and Acadia Parish border to an elevation of 7 feet (joining effective Zone AE 7, Panel GG41) at the western extent of the parish. Areas covered by panels CC to GG, 42 to 47 were assigned ABFEs of 6, 7, and 8 feet based on the USACE BFE of 6 feet on EE45, and 10 feet on FF47. ABFEs were stepped down between these BFEs and the existing effective FIRM elevations. USACE BFEs are tabulated below (Table 9). Table 9. USACE BFE data for Vermilion Parish Project ID :716 Latitude :30.045092 Longitude :-92.01845568 FIRM Panel:220221 0175D Assigned Date: 11/13/2000 BFE: 19.0 Project ID :726 Latitude :29.989555 Longitude : -92.00389977 FIRM Panel:220221 0300D Assigned Date:5/15/2000 BFE: 11.0 Project ID :745 Latitude :30.029063 Longitude :-91.98817818 FIRM Panel:220221 0175D Assigned Date:5/12/2000 BFE: 18.0 Project ID : 764 Latitude :30.032516 Longitude :-91.98207037 FIRM Panel:220221 325 Assigned Date:5/24/2000 BFE: 14.0 Project ID :820 Latitude : 30.043697 Longitude :-92.10376711 FIRM Panel:220221 0175D Assigned Date:8/10/2000 BFE: 13.0 Project ID :907 Latitude :30.14292 Longitude :-92.24150804 FIRM Panel:220221 0025D Assigned Date:1/5/2000 BFE: 23.0 Project ID :958 Latitude :30.121493 Longitude :-92.22336125 FIRM Panel:220221 150 Assigned Date:6/3/1999 BFE: 23.0 Project ID :1008 Latitude :29.991447 Longitude :-92.12256216 FIRM Panel: 220221 300 Assigned Date:2/20/1999 BFE: 14.0 Project ID :1024 Latitude :30.107835 Longitude : -92.14786363 FIRM Panel: 220221 Assigned Date:12/4/1998 BFE: 20.0 Project ID : 1202 Latitude : 29.995998 Longitude : -92.10388855 FIRM Panel: 220264 0300D Assigned Date: 4/8/2002 BFE: 14.0 Project ID :1228 Latitude :30.107891 Longitude : -92.15088894 FIRM Panel: 220221 0150D Assigned Date:4/18/2002 BFE: 20.0 Project ID :1294 Latitude :30.088858 Longitude :-92.3433805 FIRM Panel:220221 0125D Assigned Date:5/14/2002 BFE: 15.0 Project ID :1295 Latitude :30.096406 Longitude : -92.07669379 FIRM Panel:220221 0175D Assigned Date:5/14/2002 BFE: 14.0 Project ID :1322 Latitude : 30.102447 Longitude :-92.18766371 FIRM Panel: 220221 0150D Assigned Date:5/21/2002 BFE: 20.0 Project ID :1345 Latitude :30.107757 Longitude :-92.14883606 FIRM Panel:220221 0150D Assigned Date: 12/4/1998 BFE: 20.0 Project ID :1512 Latitude :29.843527 Longitude : -92.17587987 FIRM Panel:220264 0425D Assigned Date:6/10/2002 BFE: 11.0 Project ID : 1529 Latitude : 30.076949 Longitude :-92.18445622 FIRM Panel:220221 0150D Assigned Date:2/19/1998 BFE: 19.0 Project ID : 1540 Latitude : 29.969405 Longitude : -92.12118977 FIRM Panel:220221 Assigned Date: 2/18/1998 BFE: 12.0 Project ID :1572 Latitude :29.991492 Longitude :-92.12461249 FIRM Panel: 220221 Assigned Date: 1/23/1998 BFE: 14.0 Project ID :1582 Latitude : 30.123729 Longitude : -92.08896363 FIRM Panel:220221 175 Assigned Date: 1/5/1998 BFE: 16.0 Project ID :1588 Latitude :29.955089 Longitude :-92.00690073 FIRM Panel:220221 0300D Assigned Date: 10/25/1997 BFE: 11.0 Project ID :1611 Latitude :29.990551 Longitude :-92.12504018 FIRM Panel: 220221 275 Assigned Date:4/17/1998 BFE: 14.0 Project ID : 1770 Latitude :30.031719 Longitude :-92.18713792 FIRM Panel:220221 0150D Assigned Date:5/1/1997 BFE: 18.5 Project ID :1832 Latitude : 30.035244 Longitude :-92.39928226 FIRM Panel:220221 100 Assigned Date:11/19/1996 BFE: 12.0 Project ID :1842 Latitude :30.04977 Longitude : -92.00832536 FIRM Panel:220221 175 Assigned Date: 11/12/1996 BFE: 19.0 Project ID :1847 Latitude :30.106116 Longitude : -92.29666126 FIRM Panel: 220221 Assigned Date:10/16/1996 BFE: 16.0 Project ID :1927 Latitude :30.109009 Longitude :-92.15010127 FIRM Panel:220221 0150 Assigned Date: 7/24/1996 BFE: 20.0 Project ID :1927 Latitude :30.109009 Longitude :-92.15010127 FIRM Panel:220221 0150 Assigned Date:7/24/1996 BFE: 20.0 Project ID :2490 Latitude :30.048223 Longitude : -92.12369576 FIRM Panel:220227 0175D Assigned Date:8/29/2002 BFE: 15.0 Project ID :2500 Latitude :30.049055 Longitude :-92.37935789 FIRM Panel: 220221 0100D Assigned Date:9/9/2002 BFE: 10.0 Project ID :2513 Latitude :29.787346 Longitude :-92.15019708 FIRM Panel:220221 0425D Assigned Date:9/16/2002 BFE: 12.0 Project ID : 2547 Latitude :30.108826 Longitude :-92.15894908 FIRM Panel: 220221 0150D Assigned Date:10/22/2002 BFE: 21.0 Project ID : 2629 Latitude :29.757962 Longitude :-92.264276 FIRM Panel:220221 0400D Assigned Date:3/3/1994 BFE: 9.0 Project ID :2705 Latitude :30.034011 Longitude :-91.98743481 FIRM Panel: 220221 0325D Assigned Date:2/5/2003 BFE: 14.0 Project ID :2772 Latitude : 30.038835 Longitude :-92.19865052 FIRM Panel:220221 0150D Assigned Date:3/5/2003 BFE: 18.0 Project ID :2800 Latitude : 29.988405 Longitude :-92.16004897 FIRM Panel: 220221 0275D Assigned Date:3/21/2003 BFE: 13.0 Project ID :2837 Latitude :30.03553 Longitude :-92.44667953 FIRM Panel: 220221 0100D Assigned Date: 4/16/2003 BFE: 10.0 Project ID :3019 Latitude :30.063006 Longitude :-92.19599417 FIRM Panel:220221 0150D Assigned Date:6/6/2003 BFE: 18.2 Project ID :3165 Latitude :30.035507 Longitude :-92.02313387 FIRM Panel:220221 0175D Assigned Date:9/16/2003 BFE: 19.0 Project ID : 3280 Latitude : 30.103999 Longitude :-92.31933349 FIRM Panel:220221 0125D Assigned Date:11/17/2003 BFE: 16.0 Project ID :3347 Latitude :30.14164 Longitude :-92.24360496 FIRM Panel:220221 0025D Assigned Date: 1/16/2004 BFE: 22.0 Project ID :3358 Latitude :30.101947 Longitude :-92.21632353 FIRM Panel: 220221 0150D Assigned Date:1/27/2004 BFE: 20.0 Project ID :3852 Latitude :30.110479 Longitude :-92.14946997 FIRM Panel:220221 0150D Assigned Date: 1/24/2005 BFE:21.0 Project ID :3908 Latitude :30.066093 Longitude :-92.11922836 FIRM Panel:220221 0175D Assigned Date: 3/18/2005 BFE: 17.0 Project ID :3943 Latitude :30.016772 Longitude :-92.52885806 FIRM Panel:220221 0075D Assigned Date:3/5/2005 BFE: 6.0 Project ID :3944 Latitude :30.09904 Longitude :-92.19462601 FIRM Panel: 220221 0150D Assigned Date:5/3/2005 BFE: 20.0 Project ID :3947 Latitude :30.043375 Longitude : -92.37078865 FIRM Panel:220226 0125D Assigned Date:5/4/2005 BFE: 10.0 Project ID :4167 Latitude :30.04703 Longitude :-92.01064939 FIRM Panel:220221 0175D Assigned Date:1/18/2005 BFE: 19.0 Project ID :4168 Latitude : 30.119016 Longitude :-92.277814 FIRM Panel:220221 0125D Assigned Date: 12/18/2005 BFE:21.0 2. Presentation of Results The results of the technical analysis are presented in a series of Rita Recove ry Maps, on a regional overview map, and in the form of GIS files. Each of these products is summarized below: Hurricane Rita Surge Inundation and ABFE Maps (1,102 panels covering Calcasieu, Cameron, Iberia, Lafourche, St. Charles [West Bank], St. John the Baptist [West Bank], St. Mary, Terrebonne, and Vermilion Parishes): When plotted at their native size (ANSI D, 34 inches by 22 inches), the data on these maps are shown at a scale of 1 inch = 500 feet. Each map depicts the coastal HWMs used in the inundation mapping, the surge inundation limit, and ABFEs, all shown on a base map of aerial photographs collected by the U.S. Department of Agriculture (USDA) National Agriculture Imagery Program in 2004. Parish Index Maps (nine maps, one each for each parish): The maps’ native size is ANSI E (44 inches by 34 inches), but can be scaled to print on smaller sheets. Each map depicts geographic boundaries of the parish, corporate limits, the Rita Recovery Map paneling scheme (or index), the coastal HWM locations, the surge inundation limit, and the surge elevation contours. Overview Maps: Like the parish index maps, the native size is ANSI E (44 inches by 34 inches). The overview maps show the geographic boundaries of the parishes, corporate limits, the coastal HWM locations, the Hurricane Rita surge inundation limit, and the estimated surge elevation contours. GIS Data: GIS-compatible data for the following themes are provided for download on FEMA’s Rita Recovery Map site (www.fema.gov/hazards/floods/recoverydata/rita_la_gis.shtm): Surge inundation limits for each parish; ABFEs for each parish; Surge elevation contours for the nine-parish region; and HWMs for the nine-parish region, including both the surge-only points used in the inundation mapping and points with wave effects or quality concerns. To see the comprehensive HWM report for Hurricane Rita in Louisiana, see http://www.fema.gov/hazards/floods/recoverydata/pdf/rita_la_hwm_public.pdf.