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

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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 Will McRae – Levee Screenings / Risk Communication Neal Lewis – Chief of Flood Control and Hydropower, District 408 Coordinator James Harper – Lead Engineer, Red River Projects Rodney Nordby – Red River Resident Office

LEVEE SAFETY PARTICIPANTS

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LEVEE SAFETY PROGRAM KEY MESSAGES

  • Public Safety is Our Top Priority
  • Levees Do Not Completely Eliminate Flood Risk
  • Levee Safety Is a Shared Responsibility
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476 Miles Red River Basin 141 Miles Arkansas River 458 Miles Mississippi River 390 Miles Yazoo Basin 127 Miles Ouachita Basin 226 Miles Tensas Basin 14 Miles Pearl Basin 79 Miles Miscellaneous O&M

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Total Miles = 145

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Total Miles = 408

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LEVEE SAFETY PROGRAM ACTIVITIES

  • Routine Inspections
  • Checklist
  • Vegetation
  • Pipe Inspections
  • Channel Inspections
  • SWIF
  • Periodic Inspections
  • Levee System Evaluation Reports
  • Levee Screenings / Risk Assessments
  • 408 Permits
  • Routine Maintenance: Mowing, Relief Wells, Levee Slides
  • Risk Communication
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ROUTINE INSPECTIONS

  • Annual, Maintenance, or Continuing Eligibility Inspection.
  • 70 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
  • 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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ROUTINE INSPECTIONS

ARKANSAS LEVEE SEGMENTS

Red River RB – Miller County No. 2 – 37.4 miles Red River Levee RB Garland Levee District – 25.3 miles Red River LB – Hempstead County Levee – 8.7 miles Red River Levee LB – RRLD #1 – 28.1 miles Red River Levee LB – Long Prairie Levee – 16.8 miles McKinney Bayou Mid Reach – 9.0 miles McKinney Bayou North – 5.0 miles McKinney Bayou Lower – 15.1 miles Total Miles = 145

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ROUTINE INSPECTIONS

LOUISIANA LEVEE SEGMENTS

19th – Aloha‐Rigolette Area – 26.2 miles Aloha‐Rigolette RRABB – 15.9 miles Red River Levee LB – Bossier Levee – 48.7 miles Red River Levee – Caddo North – 48.3 miles Campti‐Clarence Area – 32.8 miles Red River Levee RB RRLDD – 36.6 miles Red River Levee – Caddo South – 28.8 miles Red River RB Natchitoches Parish, La – 36.4 miles East Point Levee – 14.2 miles Bayou Nicholas – Coushatta, La – 1.1 miles Pineville Louisiana and Vicinity – 1.4 miles Red River – West Agurs – 8.4 miles Red Chute Levee – 16.5 miles Red River Levee LB – North Bossier – 3.4 miles Lower Red River – 58.5 miles Twelve Mile Bayou – 23.9 miles Black Bayou – Pine Island – 6.8 miles Total Miles = 408

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ROUTINE INSPECTIONS

INTERIM ELIGIBILITY REQUIREMENTS

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ROUTINE INSPECTIONS

DRAFT NEW CHECKLIST

  • Status
  • Sponsor Brief held 11 Nov. 2016
  • Roll‐out to USACE Divisions (Oct. through Jan.)
  • Develop Inspection Guidance Language (FY 17)
  • Work with NLD team to update the LIS (FY 17)
  • 2 year trial for updated checklist & enhanced

LIS (FY 18)

  • Engineering Judgment
  • Primary/Secondary Items
  • Good/Fair/Poor
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ROUTINE INSPECTIONS

DRAFT NEW CHECKLIST

  • Primary Items

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

  • perations and maintenance activities

can negatively affect performance of the levee system if not corrected.

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ROUTINE INSPECTIONS

DRAFT NEW CHECKLIST

  • Good/Fair/Poor

Good Item Fair Item Poor Item For Primary Items, all observations must be rated "Good”. For Secondary items, all observations are rated “Good”, or one or more

  • bservations are rated “Fair” but the

number or severity of observations is not deemed significant. For Primary Items, no observations are rated “Poor” and one or more

  • bservations are rated “Fair”.

For Secondary Items, one or more

  • bservations are rated “Fair” and

the number or severity of

  • bservations is too significant to rate

the item “Good”. A Secondary Item may be rated “Fair” if the number or severity of “Poor” rated observations is not deemed significant. For Primary Items, one or more

  • bservations are rated

“Poor”. For Secondary Items, one or more

  • bservations are rated “Fair” or

“Poor” and the number or severity of

  • bservations has been deemed

significant.

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ROUTINE INSPECTIONS

VEGETATION

  • ETL 1110‐2‐583: Guidelines for Landscape Planting and Vegetation

Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures (Dated 30 April 2014)

  • Levee Owner’s Manual for Non‐Federal Flood Control Works, The Rehabilitation

and Inspection Program: Public Law PL 84‐99 (March 2006)

  • Project Maintenance Standards and Procedures: DR 1130‐2‐530 (December

2006)

  • In process of changing to MVK’s Best Management Practices
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ROUTINE INSPECTIONS

VEGETATION

  • 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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ROUTINE INSPECTIONS

VEGETATION

Unwanted Vegetation Preventing Inspection and Access

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ROUTINE INSPECTIONS

PIPE INSPECTIONS

  • Approximately 693 pipes/culverts in MVK
  • Currently 5 year inspection cycle requirement (using 2 year grace period

at discretion of LSO)

  • 13 levee segments rated U solely due to lack of pipe inspections
  • Ongoing discussion about responsibility (major or minor maintenance)
  • New guidance on culvert inspection not released for comment as of yet
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  • There are 130 Channels that Total 2,665 Miles in MVK
  • 17 Channels that Total 195 Miles in MVK Red River Drainage Area
  • Louisiana

14 Channels 128.1 Miles

  • Arkansas

3 Channels 67.1 Miles

  • Channels were inspected and reported until 2009
  • Channels were inspected by:
  • Channels were flown and photographed
  • Cross‐sections were taken at various locations
  • Visual inspections from bridges and by boat

ROUTINE INSPECTIONS

CHANNEL INSPECTIONS

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ROUTINE INSPECTIONS

ARKANSAS CHANNELS

Maniece Bayou – 22.5 miles (Meniece Bayou Drainage District) Posten Bayou – 3.2 miles (Long Prairie Levee District) McKinney Bayou – 41.4 miles (Miller County Improvement and Drainage District) Total – 67.1 miles

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ROUTINE INSPECTIONS

LOUISIANA CHANNELS

Brush Bayou – 6.2 miles (Caddo Parish Commission) Cane River – 18.6 miles (Natchitoches Levee District) Posten Bayou – 6.8 miles (North Bossier Levee District) East Point Channel – 0.1 miles (Red River Levee District) Campti‐Clarence – 16.5 miles (Natchitoches Levee District) Natchitoches Parish – 5.6 miles (Natchitoches Levee District) Aloha Rigolette Area – 20.2 miles (19th Levee District) Aloha Rigolette Area – 10.6 miles (RRABB) Pineville – 0.8 miles (RRABB) Loggy Bayou – 7.8 miles (Bossier Levee District) Bayou Pierre – 18.5 miles (Caddo Levee District) Bayou Pierre – 3.6 miles (City of Shreveport) Twelve Mile Bayou – 9.6 miles (Caddo Levee District) Wallace Bayou – 3.2 miles (Caddo Levee District) Total – 128.1 miles

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  • A SWIF provides sponsors the opportunity to transition their levees over time to

USACE standards.

  • By using a SWIF, sponsors can prioritize deficiencies to address the highest risk

first to achieve system‐wide risk reduction.

  • SWIF is appropriate are when a longer‐term, holistic approach may be necessary

to address multiple engineering deficiencies AND operation and maintenance deficiencies.

  • A SWIF may include corrective action for overarching operation and maintenance

(O&M) deficiencies, for example, a system‐wide culvert replacement (Not for Individual O&M Deficiencies).

  • Implemented in November 2011

ROUTINE INSPECTIONS

SWIF (SYSTEM-WIDE IMPROVEMENT FRAMEWORK)

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ROUTINE INSPECTIONS

SWIF (SYSTEM-WIDE IMPROVEMENT FRAMEWORK)

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  • Geotech Lead
  • Five Year Cycle
  • 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

PERIODIC INSPECTIONS

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  • FEMA is responsible for the National Flood Insurance Program (NFIP).
  • Levee Evaluation/Certification is a requirement for FEMA accreditation in the NFIP.
  • FEMA does not Evaluate/Certify levees.
  • USACE has authority to perform NFIP Levee Evaluations for MR&T levee systems for

which it has maintenance authority.

  • USACE Evaluations in Accordance with EC 1110‐2‐6067.
  • Evaluated to 1% Event.

LEVEE EVALUATION FOR NFIP

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LEVEE EVALUATION FOR NFIP

  • USACE can provide Assistance to Non‐Federal Levee Owners
  • USACE can provide Levee Evaluations for Federal Projects at Sponsor’s Expense
  • MR&T Levee’s Undergoing Rehab for Re‐Evaluation
  • Ouachita East Bank Levee – Sponsor working on Levee Setbacks and Seepage Areas
  • Red River Backwater Levee – Seepage Berm to be constructed
  • Jonesville to Larto Lake – Levee Setback being constructed
  • Yazoo Backwater Levee – Bank Caving
  • Greenwood East – Several Culverts in need of Relining or Replacing
  • Greenwood West – Several Culverts in need of Relining or Replacing
  • Aloha‐Rigolette (19th and RRABB) – Seepage Berm to be constructed and Culverts to be

inspected

  • MR&T Levee’s that have undergone New Evaluations
  • Mississippi River East Bank Levee – Positive Evaluation to be provided to FEMA in Feb.
  • Lower Red River South Bank Levee – Positive Evaluation to be provided to FEMA in Feb.
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LEVEE SCREENINGS

  • Risk Assessment of the Levee System (National Funds)
  • 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 70 segments approved through MSC
  • 57 segments through LSOG (9 segments with Final LSAC form HQ LSO)
  • 9 segments awaiting LSOG approval
  • 4 segments awaiting national cadre approval
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33 USC 408

  • Section 408 authorizes for the alteration or occupation or use of the project if it is

determined that the activity will not be injurious to the public interest and will not impair the usefulness of the project.

  • Vicksburg District uses DR 1130-2-530 for Guidance (in process of changing MVK

Best Management Practices).

  • Currently 408 Permits are technically reviewed by the Corps and Letters of

Permission or Objection Provided to Sponsor and copy furnished to applicant.

  • New Guidance from HQ in Effect July 2014
  • “Policy and Procedural Guidance for Processing Requests to Alter US Army

Corps of Engineers Civil Works Projects Pursuant to 33 USC 408”

  • Corps Will Issue Permits (Signed by Col.) for Alterations on Project Right-of-

Way (ROW).

  • Corps does not issue permits for activities off ROW.

SECTION 408 PERMITS

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ROUTINE MAINTENANCE – RELIEF WELLS

  • Average Number of Wells Needing Rehab Per Year: 270
  • Average Cost Per Well: $1,200
  • Total number of relief wells on MRL: 1,327
  • Lower Red River South Bank (LRRSB) = 54 relief wells
  • Relief Wells should be rehabbed on a 5 year cycle
  • Lose efficiency without treatment
  • MRL Maintenance Funding for MRL Wells
  • Lower Red River, South Bank Funding for LRRSB Wells
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LEVEE SLIDE REPAIR PROGRAM

  • Slides repaired/year: 20‐30
  • Cost/slide: $80k (lime adds approximately $30k)
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Risk = f(Hazard, Performance, Consequences) DEFINE RISK

Hazard System Performance Consequences

Risk

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WHY RISK ASSESSMENTS/LSAC

  • Estimation of the relative risk and an initial characterization of the portfolio of levees.
  • As a guide for setting national priorities for levee safety activities.
  • Identification of performance concerns as well as potential consequences of levee failure.
  • Communication of levee deficiencies and levee failure consequences with local sponsors.
  • Identification of issues to assist in the development of Interim Risk Reduction Measures.
  • Initial assignment of a LSAC for each levee system.

Risk Assessment

  • Risk Identification
  • Risk Estimation
  • Characterization
  • f Uncertainty

Risk Communication Stakeholder Engagement Communication of:

  • Nature of Risk
  • Uncertainties in Risk

Assessments

  • Risk Management

Options

Risk Management

  • Risk Evaluation
  • Risk Management

Options Assessment

  • Prioritization of

Recommendations

  • Risk Management

Option Selection

  • Implementation
  • Monitoring and

Review

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  • Draft Communication Plans have been

developed

  • MR&T with Sponsors
  • MR&T without Sponsors
  • O&M
  • Policy Guidance Letter – “Placing Levee

Systems in a Risk Context, Emphasis on Communication and Sponsor Engagement”

  • Dated November 6, 2015

RISK COMMUNICATION

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  • Draft Levee System Summary (LSS)

Sheets have been developed (HQ funds)

  • Final versions will be completed

after receiving HQ approved LSACs

  • MVD review will be provided as

requested

  • Sponsor review/input (when

applicable) will be provided

LEVEE SYSTEM SUMMARY SHEETS

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NLD

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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 (Documents Attached)
  • Interactive Map
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REQUESTED SUPPLEMENTAL PROJECTS

RED RIVER BANK CAVING – EAST POINT

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REQUESTED SUPPLEMENTAL PROJECTS

RED RIVER BANK CAVING – GARLAND LEVEE

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REQUESTED SUPPLEMENTAL PROJECTS

RED RIVER - MILLER COUNTY BORROW PIT

Damage from 2015 high water event

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REQUESTED SUPPLEMENTAL PROJECTS

BOSSIER PL 84-99 (ARTHUR TEAGUE PARKWAY)

Supplemental funding for bank stabilization has been requested

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Discussion?

THE END