condition assessment - hoyle tanner

Condition Assessment Presented by:

• John J. Jackman, P.E.

Associate - Asset Management Specialist

• Benjamin B. Horner, P.L.S.

Associate - Senior Designer

Agenda

• Inspection vs. Condition

• Benefits

• Developing Condition Assessment

• Initial Condition Assessment Techniques

• Typical Structural Performance Grades

• Condition Standards

• Estimating Remaining Useful Life

Inspection vs. Condition

• Inspection is the Minimum Acceptable Standard

• Condition is a Numeric Rating on the Deterioration Curve

Benefits

• Provides Accurate Information About Current and Future Performance

• Provides Reference Points on Deterioration Curve

• Prevents Premature Expenditures

• Provides the Basis for Making Capital Improvement Decisions

Developing Condition Assessment

• Current deficiencies

• Condition rating assignment• Defect type and extent

• Performance• Effective life consumed

• Utilization• Capacity assessment

• Required Repairs

Initial Condition Assessment Techniques

• Visual Assessment

• Maintenance History Review

• Operational Evaluation• Staff Interviews


• Develop standard assessment forms• Assessment tables differ for various asset types

• Train for assessment consistency

• Complete assessment during routine maintenance

• Estimate remaining useful life


• Assessment tools• Repair history

• Closed Circuit Television (CCTV)

• ZOOM Camera

• Sonar or Radar

• Smoke Testing

• Pressure Test

• Flow Metering

• C-Values

Smoke Testing

Condition Standards

• Pipeline Assessment and Certification Program (PACP)

• Manhole Assessment and Certification Program (MACP)

• Pavement Condition Index (PCI)

• Federal Sufficiency Rating (Bridge)

• Manual on Uniform Traffic Control Devices (MUTCD) (Reflectivity)

Condition Standards - PACP

• Structural Defects• Crack

• Fracture

• Deformed

• Collapsed

• Joint

• Surface Damage

• Lining Failure

• Weld Failure

• Point Repair

• Brickwork

Break

Hole


• Operation & Maintenance Defects• Deposits

• Roots

• Infiltration

• Obstacles

• Vermin Roots

Grease


• Infiltration (Groundwater)• Structural Issues

• Operation and Maintenance

• Inflow (Inappropriate Connections)• Catch Basins

• Roof Drains

• Sump Pumps

Smoke Testing

Condition Standards – PACP

• Typical Defect Grades

Grade Condition Comment

5 Immediate Attention Defect Requires Immediate Attention

4 Poor Severe Defects that will Become Grade 5 Defects within

the Near Future

3 Fair Moderate Defects that will Continue to Deteriorate

2 Good Defects that have not Begun to Deteriorate

1 Excellent Minor Defects


• Typical Performance Grades

Grade Condition Performance

5 Immediate Attention Collapsed or Collapse Imminent

4 Poor Collapse Likely in Foreseeable Future

3 Fair Collapse Unlikely in Near Future

2 Good Minimal Collapse Risk

1 Excellent Acceptable Structural Condition

Condition Standards - PCI

• Two Ways to Measure the Road Network Condition • Only Address Reported Complaints

• Preventative Maintenance Based on Condition Assessment

• Critical information for each roadway segment • Class - Local Residential, Collector, or Arterial

• Length, Width, and Geometry

• Traffic Type and Volume

• Pavement Type - Flexible, Rigid, or Composite

• Original Construction Date

• Maintenance and Rehabilitation History

• Current PCI Condition


Airport Runways and Taxiways Roads and Highways


Weig

ht

Index (

Wi) Severity of Distress (Si) Density of Distress (Di)

Very

Slight

Slight

Modera

te

Severe

Very

Severe

Few

Inte

rmit

tent

Fre

quent

Exte

nsi

ve

Thro

ughout

<10 10-20 20-40 40-80 >80

Pavement Wi 1 2 3 4 5 1 2 3 4 5

Surface DefectsRaveling & loss of surface aggregate

3.0

Flushing 1.5

Surface Deformations

Rippling and Shoving 1.0

Wheel Track Rutting 3.0

Distortion 3.0

Cra

ckin

g

Longitudinal

Wheel Track

Single and Multiple1.5

Alligator 3.0

CenterlineSingle and Multiple 0.5

Alligator 2.0

Pavement EdgeSingle and Multiple 0.5

Alligator 1.5

TransverseHalf, full and multiple 1.0

Alligator 3.0

Longitudinal-meander or mid-lane 1.0

Random 0.5

Condition Standards -Federal Sufficiency Rating

• Based on an 100 Point Scale

• Overall Rating of a Bridges Fitness

Estimating Remaining Useful Life


• Deterioration curve impacts• Current condition

• Environmental conditions

• Severity of service

• Past experience


• Determining Rehabilitation/ Replacement Cost• Construction Cost Estimating Guides

• Manufacturer Quotes

• Cost Data from Previous Bids

• Estimate Current Cost from Original Cost

condition assessment - hoyle tanner

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