State of Texas Hazard Mitigation Plan - Texas Department of Public ...

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ars. Similar to the swash regime, the sand bar will naturally migrate back to the beach. However,unlike the temporary changes of the swash regime, the restoration of the dunes can take years if atall. In some cases it can result in a net, or (semi-) permanent, change to the dunes.Overwash Regime – In more intense storms, if the wave run-up exceeds the elevation of thedunes, the dune system will be overtopped, transporting eroded sand landward. This net transportof sand landward contributes to the landward migration of the barrier islands.Inundation Regime – In extreme storm events, if the elevation of the storm surge is sufficientlyhigh, the barrier island or peninsula will become completely submerged. Large volumes of sandare transported landward resulting in the landward migration of the barrier island or peninsula.This extreme coastal change may result in a long-term, permanent change in the barrier island andpeninsula morphology and may affect their future resilience in storms.Hurricane Ike made landfall on the morning of September 13, 2008 on the East end of GalvestonIsland as a Category two storm with sustained winds of 110 MPH. The Bolivar Peninsula wasjust to the right of landfall, placing it on the strong side of the hurricane. Ike‘s sustained windspushed up to a 21-foot storm surge (still water level) across Bolivar, destroying over 3000 homesand causing severe, permanent change in the shoreline. In contrast, Galveston Island at, 10.65-foot elevation, measured a storm surge elevation (still water level) of up to 14 feet. Propertylosses in Texas from Ike total an estimated $12.5 billion.GLO Coastal Assets:Following the impact of Hurricane Ike, the GLO developed a storm response plan to guide theagency in a safe, timely, and effective response to incidents, such as hurricanes and tropicalstorms, which threaten the state‘s coastal assets. Under the GLO Storm Response Plan, theagency needed to determine the pre-event baseline value of its coastal assets, which were at riskof a storm impact. In order to calculate the exposure of GLO coastal assets, the first step was toconduct an inventory of at-risk coastal assets of the GLO. An interactive GIS-based atlas wasdeveloped, which divided the coast into four sectors as shown in Map 1.6. The sectors provide anoverview of GLO coastal assets in relation to high-risk hazard areas using a macro approach toascertain the extent of vulnerability for GLO coastal assets within a predicted impact area. Theinventory establishes baseline information, which provides the GLO the ability to track changesduring response and recovery phases.- 77 -
Map1.6: GLO Asset SectorsIn addition, each GLO coastal asset location is symbolized within each sector and includesimportant attribute information for each asset, including lease information, type of structure orfacility, its purpose, and the amount of revenue the agency is receiving from each asset. Theinventory also includes the location, details, and cost of mitigation and restoration projectsconducted by the GLO. The atlas further identifies the highest concentration of exposure, bysector, for the agency‘s coastal assets.- 78 -
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determine if the strategies remaine
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RECORD OF CHANGESCHANGE NUMBER DATE
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Estimated Losses to State Facilitie
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SECTION 5 - COMPREHENSIVE STATE HAZ
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INTRODUCTIONEffective mitigation re
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SECTION 1 - PLANNING PROCESSDocumen
Page 26 and 27: SECTION 2 - RISK ASSESSMENTGeneralT
Page 28 and 29: Figure 2-1: Interaction of Seasonal
Page 30 and 31: Figure 2-3: Average Annual Precipit
Page 32 and 33: 2.2 PHYSIOGRAPHYFour principal phys
Page 34 and 35: million years old) inland sea. Natu
Page 36 and 37: Sand is also deposited just off sho
Page 38 and 39: POPULATIONThe population of Texas o
Page 42 and 43: The most obvious tool a local entit
Page 44 and 45: Table 2-6: 100-Year Flood AreasZone
Page 46 and 47: TROPICAL STORMS AND HURRICANESHurri
Page 48 and 49: Table 2-10: Saffir-Simpson ScaleCat
Page 50 and 51: HAZARD PROFILE WORKSHEETHazard: Tro
Page 52 and 53: Map 2-2: NOAA Tornado Zones in Texa
Page 54 and 55: The Enhanced Fujita Scale, or EF Sc
Page 56 and 57: DROUGHTDrought is defined as the co
Page 58 and 59: HAZARD PROFILE WORKSHEETHazard: Dro
Page 60 and 61: Table 2-14: Wildfire Occurrences in
Page 62 and 63: Map 2-5: UWI-Areas in South TexasMa
Page 64 and 65: COASTAL EROSION IS A HYDROLOGIC HAZ
Page 66 and 67: environmental damage in the process
Page 68 and 69: Map 1.3: Critical Eroding Areas of
Page 70 and 71: Thirty-nine faults with a cumulativ
Page 72 and 73: Tropical Storms - Tropical storms a
Page 76 and 77: Sector Counties GLO $ at RiskSector
Page 78 and 79: DAM AND LEVEE FAILUREA dam failure
Page 80 and 81: FREQUENCY OF OCCURRENCEHistorically
Page 82 and 83: HAZARD PROFILE WORKSHEETHazard: Dam
Page 84 and 85: - 87 -Figure 12BMap indicating prob
Page 86 and 87: Because damaging earthquakes are ra
Page 88 and 89: Figure 12E:Felt area and ModifiedMe
Page 90 and 91: Regional Hazard AssessmentNortheast
Page 92 and 93: Events of these magnitudes seldom p
Page 94 and 95: HAZARD PROFILE WORKSHEETHazard: Ear
Page 96 and 97: Texas is a State severely challenge
Page 98 and 99: HAZARD PROFILE WORKSHEETHazard: Exp
Page 100 and 101: Table 2-20: Extreme Heat Occurrence
Page 102 and 103: HAILSTORMMap 2-15: Hail Occurrences
Page 104 and 105: SizeCodeH10IntensityCategoryModifie
Page 106 and 107: LAND SUBSIDENCELand subsidence is d
Page 108 and 109: SEVERE WINTER STORMSevere winter st
Page 110 and 111: Figure 2-4: NOAA Wind Chill ChartSo
Page 112 and 113: ElPasoHudspethCulbersonJeffDavisPre
Page 114 and 115: HAZARD PROFILE WORKSHEETHazard: Sev
Page 116 and 117: Table 2-24: Beaufort Wind ScaleWind
Page 118 and 119: HIGH WINDTexas is subject to damagi
Page 120 and 121: The graphic above is the mixed anal
Page 122 and 123: Assessing Vulnerability and Estimat
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damages. A 100-year flood even alon
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ALAMO AREA COUNCIL OF GOVERNMENTS (
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(h) Gas Pipelines(1) Primary Impact
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i. High: 15ii. Significant: 35iii.
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(f) Thunderstorms - Potential annua
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Average annual insured loss: $2,633
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Please note that due to FEMA reduci
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(n) Wildfires(1) Tarrant County has
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significant events documented the e
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(g) Winter/Ice StormsTarrant County
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damaged or destroyed. There could b
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Sabine River Authority (SRA)This pl
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(1) The likelihood or future probab
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VulnerabilityVery High Risk - Peopl
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transportation of hazardous materia
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Minor: Minor extent is the lower en
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(1) The extent of a disaster would
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(1) The extent of a disaster would
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As mitigation grant applications ar
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So, while development in hazard pro
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sources), placed on a Web site, and
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Dam Failure -Earthquake -Hail -Wint
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Flood -Hurricane -Tornado -Wildfire
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Infrastructure that was determined
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Table 2-29: Flood Loss Estimates to
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Coastal ErosionTotaling the expecte
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EarthquakeWhile the most severe ear
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SECTION 3 - MITIGATION STRATEGYRequ
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only expends the FMA and SRL grant
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HOUSE BILL 1018The 77 th Texas Legi
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ut could be an effective lobbying o
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Figure 1. Boundary of the Coastal M
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Most coastal states use all or most
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The Hazard Mitigation Program serve
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Oil Spill personnel are specificall
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TEXAS WATER DEVELOPMENT BOARD (TWDB
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THE LOWER COLORADO RIVER AUTHORITY
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Commission in the EMC is to provide
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For private landowners, we're worki
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previous Long Term Recovery committ
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insurable property for windstorm an
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The priority ranking was determined
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Houston, Mesquite, and San Antonio.
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Program: Pre-Disaster Mitigation (P
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in federal funds for 10 projects, C
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yards of beach quality sand was pla
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Bolivar Peninsula. The estimated co
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The GIWW also handles 90% of all ga
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and processing of all hazard mitiga
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measures to take by property owners
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Data Shortfall Strategies(a) Local
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Join the Community Rating System in
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REPETITIVE FLOOD CLAIM (RFC) PROGRA
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actions orenforcement such aszoning
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Promote and provideenhanced warning
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SECTION 4 - LOCAL MITIGATION PLANNI
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Local Plan IntegrationSTATE REVIEW
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Up to 7% of HMGP money may be used
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our Financial and Technical Service
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SECTION 5 - COMPREHENSIVE STATE HAZ
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(6) All jurisdictions within the de
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Summary of HMGP, FMA, SRL, RFC and
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documentation as part of the grant
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to the BCA. If there are any discre
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G711 - PUBLIC OFFICIALS MITIGATION
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PartnershipsTEXAS ASSOCIATION OF RE
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See Section 3.C.3.b for information
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SECTION 6 - PLAN MAINTENANCE PROCES
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Monitoring Progress of Mitigation A
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project is then reported on the qua
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Single Audit Act of 1984, Public La
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SECTION 7 - ATTACHMENTSAttachment O
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Aerial View of Klein High School Ca
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The inlet grates (wide black line o
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Jersey Village and Property locatio
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Again, using FEMA’s Benefit-Cost
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the parking lot. Windows failed und
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Attachment 5Attachment 5 includes a
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Attachment 5 (continued)AGENDAState
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Attachment 5 (continued)- 291 -
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IntroductionA major challenge faced
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B. Federally Authorized Programs1.
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w. Section 406 Hazard Mitigation Gr
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ProgramAuthorityFundingSourcePurpos
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ProgramAll HazardsEmergencyOperatio
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SECTION 9 - APPENDICESAppendix AThe
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Four principal physiographic region
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Water Development Board (TWDB, 2007
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Table 2-1: Features of Major River
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statewide data indicates that appro
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Figure 2-4: Repetitive Loss Propert
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In the future, the TWDB will coordi
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cover entire watersheds, major or m
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Effectiveness -Yes. Application pri
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TWDB will coordinate with TDEM and
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FEMA‘s Web Data Exchange database
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SECTION 10 - REFERENCESAlvarez, E.
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