Lower Sabine Watershed Discovery Report - RiskMAP6

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Community Name Community Identification Number Beauregard Parish, Louisiana Communities Beauregard Parish (Unincorporated Areas) 220026 Town of Merryville 220028 Calcasieu Parish, Louisiana Communities Calcasieu Parish (Unincorporated Areas) 220037 Cameron Parish, Louisiana Communities Cameron Parish (Unincorporated Areas) 225194 Jasper County, Texas Communities Jasper County (Unincorporated Areas) 481080 City of Kirbyville 480384 Newton County, Texas Communities Newton County (Unincorporated Areas) 480499 City of Newton 480500 Orange County, Texas Communities Orange County (Unincorporated Areas) 480510 City of Bridge City 480511 City of Orange 480512 City of Pinehurst 480513 City of Vidor 480514 City of West Orange 480515 Sabine Parish, Louisiana Communities Sabine Parish (Unincorporated Areas) 220368 Village of Fisher 220376 Village of Florien 220326 Vernon Parish, Louisiana Communities Vernon Parish (Unincorporated Areas) 220228 Village of Anacoco 220046 Town of Hornbeck 220332 City of Leesville 220229 Town of New Llano 220340 ii
Table of Contents Acronyms and Abbreviations ........................................................................................ iii I. Discovery Overview .................................................................................................... 1 i. Watershed Selection ............................................................................................ 2 II. Discovery Efforts ....................................................................................................... 16 i. Engagement Plan ................................................................................................ 16 ii. Pre-Discovery Meeting Efforts ........................................................................... 17 iii. Discovery Meeting .............................................................................................. 18 iv. Discovery Implementation ................................................................................ 20 v. Data Gathering Overview ................................................................................... 21 III. Watershed Findings ................................................................................................ 30 i. Pre-Discovery CNMS Analysis ........................................................................... 31 ii. Pre-Discovery Hydrology .................................................................................. 35 iii. Pre-Discovery Hydraulics and Floodplain Analysis .......................................... 41 iv. Engineering Review of Community Comments ............................................... 47 IV. Watershed Options ................................................................................................. 48 Tables Table 1: Disaster Declarations in the Watershed Since 2002 ........................................ 7 Table 2: Current FIRM Date and Status ........................................................................ 8 Table 3: Mitigation Plan Status ...................................................................................... 9 Table 4: Stream Miles within the Lower Sabine Watershed ....................................... 10 Table 5: NVUE Approximate Stream Miles in the Watershed ..................................... 11 Table 6: Lower Sabine Watershed CNMS Summary by County .................................. 11 Table 7: Lower Sabine Watershed Risk Factor Rankings ............................................ 12 Table 8: NFIP Insurance Claims by County and Community within the Watershed ....................................................................................................... 13 Table 9: Repetitive or Severe Repetitive Loss within the Watershed .......................... 13 Table 10: Regional Project Team ................................................................................... 16 Table 11: Project Discovery Workshop Times and Locations ...................................... 19 Table 12: Data Collection Summary – Pre-Discovery Workshop ................................ 21 Table 13: Data Collection Summary – During and After Discovery Workshop ......... 24 Table 14: CNMS Analysis ................................................................................................ 31 Table 15: CNMS Category Descriptions ........................................................................ 32 Table 16: Summary of Hydrologic Information for Detailed Streams ........................ 37 i
Page 1: Discovery Report Lower Sabine Water
Page 5 and 6: Acronyms and Abbreviations AAL BFE
Page 7 and 8: I. Discovery Overview The Federal E
Page 9 and 10: Figure 1: Lower Sabine Watershed an
Page 11 and 12: Figure 2: Percent Urban Cover Lower
Page 13 and 14: Other important stakeholders in the
Page 15 and 16: County’s FIRMs and provide a unif
Page 17 and 18: mileage from CNMS for the whole Wat
Page 19 and 20: Table 8: NFIP Insurance Claims by C
Page 21 and 22: Figure 4: Risk Factors and Topograp
Page 23 and 24: The Engagement Plan is a tool that
Page 25 and 26: Discovery Workshop attendees to lis
Page 27 and 28: were appreciative of the chance to
Page 29 and 30: Data collected in the pre-discovery
Page 31 and 32: Table 13: Data Collection Summary -
Page 33 and 34: Table 13: Data Collection Summary -
Page 35 and 36: All supporting information, data, a
Page 37 and 38: i. Pre-Discovery CNMS Analysis Tabl
Page 39 and 40: Summary of CNMS Concerns Beauregard
Page 41 and 42: Newton County, Texas: Newton County
Page 43 and 44: and Orange Counties have effective
Page 45 and 46: Table 17: Comparison of 1-Percent A
Page 47 and 48: iii. Pre-Discovery Hydraulics and F
Page 49 and 50: Figure 5: Sabine River SFHA Disconn
Page 51 and 52: Figure 7: Sabine River SFHA Disconn
Page 53 and 54:
iv. Engineering Review of Community
Page 55 and 56:
Table 20: Potential Watershed Actio
Page 57 and 58:
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Table 21: Metrics and Rankings of N
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Lower Sabine Watershed Discovery Report - RiskMAP6

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