VICKSBURG DISTRICT LEVEE SAFETY PROGRAM 237 217 200 80 252 237 - - PowerPoint PPT Presentation

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VICKSBURG DISTRICT LEVEE SAFETY PROGRAM 237 217 200 80 252 237 - - PowerPoint PPT Presentation

Dec 02, 2023 345 likes •542 views

VICKSBURG DISTRICT LEVEE SAFETY PROGRAM 237 217 200 80 252 237 217 200 119 174 237 217 200 27 .59 255 0 163 131 239 110 112 62 102 130 255 0 163 132 65 135 92 102 56 120 255 0 163 122 53 120 56 130 48

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“The views, opinions and findings contained in this report are those of the authors(s) and should not be construed as an official Department of the Army position, policy or decision, unless so designated by other official documentation.”

VICKSBURG DISTRICT LEVEE SAFETY PROGRAM

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Lanny Barfield – DSO/LSO, Chief of Geotechnical Branch Brian Jordan – Chief of Analytical & Levee Safety Section Craig McRaney – Levee Safety Program Manager Neal Lewis - Chief of Flood Control & Hydro Power Section Rodney Nordby - Red River Project Office LEVEE SAFETY PROGRAM

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LEV LEVEE EE SAF SAFETY ETY PR PROGRA OGRAM M KEY KEY MESSA MESSAGES GES

  • Public Safety is Our Top Priority
  • Levees Do Not Completely Eliminate Flood Risk
  • Levee Safety Is a Shared Responsibility
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LEV LEVEE EE SAF SAFETY ETY PR PROGRA OGRAM M ACTIVITIES CTIVITIES

  • Routine Inspections
  • Periodic Levee System Evaluation Reports
  • Levee Screenings / Risk Assessments
  • Risk Communication
  • 408 Permits - HDD
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ROUTINE OUTINE INSPECT INSPECTION IONS

  • Annual, Maintenance, or Continuing Eligibility Inspection.
  • 71 Segments, 56 Systems
  • Evaluate Compliance with Assurances.
  • Evaluates Maintenance as it relates to the Design Project Flood, Owner

Preparedness, and Component Operations.

  • Standard Checklist/Drive Along Levee Crown.
  • Currently led by Area Offices with Levee Safety Engineers in Support
  • Operations responsible for letters ( with checklist) to Sponsors
  • May or May Not affect NFIP Eligibility.
  • Used to Determine Continuing Eligibility for Rehab Assistance Under PL

84-99 Program, if applicable.

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ROUT OUTINE INE INSP INSPEC ECTIONS TIONS

DRAFT DRAFT NEW NEW CHECKLIST CHECKLIST

  • Status
  • Sponsor Brief held 11 Nov. 2016
  • Develop Inspection Guidance

Language (FY 18)

  • Work with NLD team to update the

LIS (FY 18)

  • 2 year trial for updated checklist &

enhanced LIS (FY 18-20)

  • Engineering Judgment
  • Primary/Secondary Items
  • Good/Fair/Poor
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ROUTINE OUTINE INSPECT INSPECTION IONS

DRAFT DRAFT NEW NEW CHECKLIST CHECKLIST

  • Primary Items

An item deemed to be essential to the performance of the levee to the extent that lack

  • f corrective action and/or deterioration of the

item’s condition would likely result in flooding of the leveed area.

  • Secondary Items

Any inspection item not deemed to be a Primary

  • Item. It is equally important to observe and

document the condition of Secondary Items since the lack of effective operations and maintenance activities can negatively affect performance of the levee system if not corrected.

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ROUTINE OUTINE INSPECT INSPECTION IONS

VEGE VEGETATION ION

  • No substantial change in vegetation criteria between Old and New Checklist
  • Interim Eligibility Requirements
  • Vegetation does not affect eligibility
  • Exception: vegetation is so prevalent, it prevents proper inspection or

access during a high water event (e.g., Red River LB – North Bossier)

  • MVK Assessment of Vegetation
  • In vegetative free zone – MA
  • On Levee – U
  • For NFIP – guidance references vegetative ETL
  • Typically vegetation not cause of negative recommendation unless

significant amounts on levee section

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  • Geotech Lead
  • Five to Ten Year Cycle Depending on LSAC Rating
  • Also a Continuing Eligibility Inspection For PL 84-99 Assistance
  • Also Evaluates Maintenance, Preparedness, and Component Operation
  • Replaces the Annual Inspection for the Year Performed
  • Utilizes Same Checklist
  • Inspection More Thorough as Crown, Levee Slopes, and Levee Toes

Traversed

  • System Design Reports, Plans & Specs, Studies, Past Performance Inspection,

Records Reviewed

  • Design Criteria Review Performed
  • Does Design Meet Current Criteria?
  • Provides Data and Information for Levee System Screenings
  • Policy Guidance Letter – “Periodic Inspection Procedures for the Levee

Safety Program”

  • Dated December 17, 2008

PER PERIODIC IODIC INSPECT INSPECTION IONS

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LEV LEVEE EE SCR SCREENINGS EENINGS

  • Risk Assessment of the Levee System
  • Purpose:
  • To Prioritize Levee Systems Based on Risk and provide initial

LSAC.

  • Develop a Relative Risk Ranking for Corps Levees.
  • Input Into Screenings From:
  • NLD
  • Routine and Periodic Inspections
  • Historic Performance During High Water
  • Limited Engineering Assessments
  • Data on Consequences (Population, Structures, etc.)
  • Status
  • All 71 segments (56 systems) approved by National Cadre
  • 55 Segments with Final LSAC from HQ LSO
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Risk = f(Hazard, Performance, Consequences) RISK RISK COMMUNICA COMMUNICATION TION

Hazard System Performance Consequences

Risk

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Levee Boards with Final Risk Determination - AR

  • Hempstead Co Levee
  • Long Prairie Levee
  • Long Prairie Levee
  • North Bossier Levee
  • McKinney Bayou Mid- North Levee
  • McKinney Bayou North
  • McKinney Bayou Mid
  • McKinney Bayou South Levee
  • Red River Levee District No. 1 Levee

RISK COMMUNICATION

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Levee Boards with Final Risk Determination - LA

  • Bossier Levee
  • Black Bayou Pine Island Levee
  • Twelve Mile Bayou Levee
  • Caddo North Levee
  • Caddo South Levee
  • Caddo South
  • Red River Levee and Drainage District
  • East Point Levee
  • Bayou Nicholas - Coushatta Levee
  • Aloha-Rigolette - 19th Levee
  • RRABB Levee District
  • 19th District Levee Board

RISK COMMUNICATION

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  • Draft Levee System Summary

(LSS) Sheets have been developed

  • Final versions will be completed

after receiving HQ approved LSACs

  • Schedule is being Developed

for Risk Communication and LSS

  • Sponsor review/input (when

applicable) will be provided LEVEE SYSTEM SUMMARY SHEETS

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NATION TIONAL AL LEV LEVEE EE DATAB ABASE ASE (NLD) (NLD)

  • Descriptions
  • Maintenance Responsibilities
  • Structural Makeup (Embankments, Floodwalls, Gravity Drains, etc.)
  • LSAC
  • Consequence Data (PAR, Economic Damage)
  • History (Flood of Record, Performance, Construction/Remediation Dates)
  • Elevation Profiles
  • Inspection History
  • Interactive Map
  • MVK will upload Levee System Summaries (LSS) on the NLD in when complete
  • HQ will upload Project Description and Risk Information on the NLD in the Spring

for Systems in which a LSS has not been uploaded to the NLD

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Discussion?

THE THE END END