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FHWANBIS23MetricComplianceReview
Jose J. OrtizDivision Bridge Engineer
Bridge Inspection ConferenceFebruary 15th, 2017
NBISreview…why?Required by law (MAP‐21)To ensure public safety and bridge preservationNBIS sets the national standards for the proper safety inspection and evaluation of all highway bridges.FHWA ensure that all bridges are inspected accordingly.Notes:INDOT is ultimately responsible for all bridge inspections in the state; this includes ensuring compliance of NBIS regulations by LPAsReview provides a bridge inspection program assessment that potentially identify any deviation from the standards.
NBISreview…Whatisit?Risk‐based and data driven reviewPerformed annually and is based on 23 bridge metrics identified in the NBIS regulations
Each metric is assessed and determined to be:CompliantSubstantially Compliant ‐ requires action by INDOTNon‐Compliant – requires action by INDOTConditional Compliant ‐ requires action by INDOT
Some criteria evaluate sample of bridgesSome criteria evaluate entire bridge population in NBI
NBISreview…Whatisit? 1: Bridge inspection organization Qualifications 2: Qualifications of Program Manager 3: Qualifications of Team Leaders 4: Qualifications of Load Rating Engineer 5: Qualifications of UW Bridge Inspection Diver
Frequency 6: Routine inspection frequency – Lower risk bridges 7: Routine inspection frequency – Higher risk bridges 8: UW inspection frequency – Lower risk bridges 9: UW Inspection frequency – Higher risk bridges 10: FC inspection frequency 11: Inspection frequency criteria
NBISreview…Whatisit?Procedures12: Inspection procedures – Quality Inspections13: Load Rating14: Load Post or Restrict15: Bridge Files16: FC inspection procedures17: UW Inspection procedures18: Scour Critical inspection procedures19: Complex inspection procedures20: QC/QA procedures21: Critical findings procedures
NBISreview…Whatisit? Inventory22: Prepare and maintain bridge inventory23: Timely updating of bridge inventory data
Results:Metric#1Bridge Inspection OrganizationDetermination:Compliance
Reason for determination:Organizational roles and responsibilities are clearly defined and documented; including delegated roles and responsibilities.
Action Expected:Continue to monitor any delegated functions.
Results:Metric#2,3,4,&5Qualification of Personnel – Program ManagerQualification of Personnel – Team LeaderQualification of Personnel – Load Rating EngineerQualification of Personnel – UW Bridge Inspection DiverDetermination:Compliance
Reason: All personnel in the population had the required qualifications.
Action Expected: INDOT approves qualified personnel and maintain updated documentation PE certifications NHI courses certificates
Results:Metric#6,7,8,9&10 Inspection Frequency – Lower Risk Bridges Inspection Frequency – Higher Risk Bridges Inspection Frequency – Underwater – Lower Risk Bridges Inspection Frequency – Underwater – Higher Risk Bridges Inspection Frequency – Fracture Critical MemberDetermination:Compliance & Substantially Compliance
Reason for determination: Routine Inspection intervals < 24 monthsUnderwater Inspection intervals < 60 months Fracture Critical Member Inspection Intervals <24 months
Action Expected: Monitoring Inspection data into BIAS w/in 60 days
Results:Metric#11Inspection Frequency – Frequency CriteriaDetermination:Compliance
Reason: Improvement plan completed. A criteria has been established to determine the level of inspection and frequency. Example: Bridge with condition rating of 4 or less will have a reduced inspection interval by adding a Special Inspection every 12 months.
Action Expected: Monitoring
Results:Metric#12Inspection procedures – Quality InspectionsDetermination:Substantial Compliance
Reason: At least 80% of inspection reports meet criteria for quality assessments, ratings and documentation
Results:Metric#12Notable deficiency identified“Notable deficiency” definition Those deficiencies leading to NBI component rating of 5 or less, or required some kind of immediate action.
Narrative justifies condition rating“Appropriate justification” definition The lower the condition rating the higher amount of documentation
How to identify or justify condition?
Results:Metric#12
Description:North face of pile bent #8, moderate spalling, delamination and exposed rebar on 4 out 9 piles. No deterioration notice at the south face.
Some spalling with exposed rebar at interior bent
Results:Metric#12
Description:South barrel looking east, heavy scaling of concrete slab.
Scaling of concrete slab
Results:Metric#12Example:Narrative:Multiple 1/16” to hairline cracks on south abutment west end with efflorescence on west face of abutment stem, backwall and wingwall . 1’x2’ delaminated area on west face of stem and 1’x3’ area on front face of backwall.
Sketch: Not neededPhoto description: South abutment, west end,
Cracking with efflorescenceand delamination.
Results:Metric#13Inspection Procedure – Load RatingDetermination:Conditional Compliance
Reason: Adhering to FHWA approved plan of corrective action (PCA).All bridges are load rating are accurate to current conditions.
Criteria:
Results:Metric#13
Action Expected: INDOT continue implementing their revised load rating policy on all LPA bridges.
Results:Metric#14Inspection Procedure – Post or restrict bridgesDetermination:Compliance
Reason: All bridges are properly posted or restricted as required.
Criteria:FHWA HQ report (compares item 70 with item 41)Posting Signs
Results:Metric#14
Coding Guide Definition:R: Posted for other load‐capacity restriction (speed, number of vehicles on bridge, etc.)
INDOT’s Definition:R: Posted for other than load
Geometry restriction? Load capacity restriction? Other restriction?
Results:Metric#15 Inspection Procedure – Bridge FilesDetermination:Conditional Compliance
Reason: Adhering to FHWA approved plan of corrective action (PCA).
Criteria:All bridges have files.All bridges have the applicable significant files.
Significant files:Routine Inspection Reports Special Inspection Reports Load Rating DocumentationCritical Findings and Actions Scour AssessmentsPosting Documentation Significant Correspondence
Results:Metric#15
BIAS
Inspection Report
Load Rating Calculations
Critical Finding and Actions
Scour Assessment
Bridge Inventory Assessment System (BIAS), is the approved method for maintaining bridges files.
Results:Metric#16Inspection Procedure – Fracture Critical MembersDetermination:Non‐Compliance
Reason: Action item on PCA was not completed by the established due date.
INDOT’s Action:Revised Bridge Inspection Manual including the Fracture Critical section has been posted and memorandum was issued and posted.
Results:Metric#16
CriteriaBridges with Fracture Critical Members have written inspection procedures which clearly identify the location of all FCMs, specify the frequency of the inspection, describe any specific risk factor unique to the bridge, and clearly detail inspection methods and equipment to be employed.
All bridges with Fracture Critical Members are inspected according to those procedures.
Results:Metric#16Inspection ProcedureUp‐close visual inspection?What to do if a deficiency is found?
EquipmentUnder bridge inspection vehicleHammerWire brushCameraetc.
Concurrence with routine inspectionAgree or disagree with condition code
Results:Metric#17Inspection Procedure – UnderwaterDetermination:Compliance
Reason: All bridges requiring UW inspection have written inspection procedures which clearly identify…
Underwater elements are inspected according to those procedures.
INDOT’s Action:Keep inspecting bridges according to established procedures.
Results:Metric#18Inspection Procedure – Scour Critical BridgesDetermination:Conditional Compliance
Reason: Adhering to FHWA approved plan of corrective action (PCA).
INDOT’s Action:Develop a Scour Screening Assessment Policy for LPA bridges and developed a Scour Plan of Action and monitoring policy.
On schedule – The BIM have been revised and a new scour forms is now available in BIAS.
Results:Metric#19Inspection Procedure – Complex BridgesDetermination:Conditional Compliance
Reason: Adhering to FHWA approved plan of corrective action (PCA).
Actions taken:Re‐evaluate the inspection plans for all complex bridges as they are due for inspection.
Structural Mechanical Electrical
Results:Metric#20Inspection Procedure – QC/QACompliance
Reason: Quality Control and Quality Assurance procedures are established and implemented.
INDOT’s Actions:Continuing monitoring their QC/QA consultant to make sure the final product will help INDOT to analyze their process effectiveness.
BestBetterGood
Results:Metric#21Inspection Procedure – Critical FindingsSubstantial Compliance
Reason: 76 Critical Findings identified during 2016 were resolved. Some documentation was incomplete.Lack of proper level of urgency.
INDOT’s Actions:Ensure documentation is complete and that a proper level of urgency is given to all critical findings.
Results:Metric#21Critical Findings Definition“A structural or safety related deficiency that requires immediatefollow‐up inspection or action”.
Critical Finding Identified
Action Recommended
Timely Action Taken
Close out Critical Finding
Results:Metric#21
Lane restriction Closure Load Rating / Posting Temporary repair In‐depth Inspection
Permanent repair Load Rating / Posting Schedule maintenance
Results:Metric#21
What is the immediate action?Demolish damage portion of bridge as quick as possibleClose bridge Expedite a permanent repair contract
Results:Metric#22Item
16‐ Latitude17‐ Longitude
28A‐ Lanes on Structure41‐ Structure Open/Posted/Closed/NA
43A‐ Kind of Materia/Design43B‐ Type of Design/Construction61‐ Channel/ Channel Protection72‐ Approach Roadway Alignment
92A‐ Fracture Critical Detail92B‐ Underwater Inspection92C‐ Other Special Inspections
103‐ Temprary Structure Designation104‐ Highway System Inventory
112‐ NBIS Bridge Length113‐ Scour Critical Bridges2‐ Highway Agency District
26‐ Functional Class of Inv RTE42A‐ Type of Service on
42B‐ Type of Service Under45‐ Number of Spans in Main Unit51‐ Bridge Roadway Width C‐C
52‐ Deck Width Out ‐ Out90‐ Inspection Date
91‐ Designated Inspection Frequency100‐ STRAHNET Designation
Results:Metric#23Inventory – Prepare and MaintainDetermination:Substantial Compliance
Reasons:SI&A data is updated in the State Inventory within 90/180 days.
Requirements:State Bridges are Required to be Approved and Updated 90 Days After Inspection Date. INDOT Requires Approval 30 Days After Inspection
Local Bridges are Required to be Approved and Updated 180 Days After Inspection Date. INDOT Requires Approval 60 Days After Inspection
Results:Metric#23Inventory – Prepare and MaintainDetermination:ComplianceSubstantial Compliance
INDOT’s action: Continue monitoring the timeliness of bridge data updates
1 State Bridge 2 Local Bridges