Chapter 3 Survey of Asset Management Practices

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Chapter 3 Survey of Asset Management Practices

• Objective to understand the current development
  and implementation of culvert asset management in
  United States and Canada.
• The survey questionnaire was simple and focused
  on two main tasks culvert inventory (12
  questions) and inspection decision support
  system (11 questions).

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Culvert Inventory Questions

• 1. What is the condition of majority of culverts
  in your state?
• 32 responses in total
• 81 of the respondents the culverts in their
  state were in good condition and have not given
  any indications of reaching their useful service
  life.
• 6of the respondents Their culverts were in very
  good condition and could serve their purpose
  without any danger/problems for few more years.
• 13 of the respondents Their culverts were in
  the verge of their useful service life and need
  some type of assessment protocols to track and
  assess their condition

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Culvert Inventory Questions

• 2. Does your state have a standard set of
  inventory guidelines for culverts?
• The response rate for this question was 85.
• 62 of the respondents They had some form of
  tracking system for the large culverts. They were
  not having any tracking system for smaller
  culverts spanning lt 3.
• 24 of the respondents They had no tracking
  system for both large and small culverts.

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Culvert Inventory Questions

• 3. What are the minimum and maximum sizes of
  culverts in your state?

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Culvert Inventory Questions

• 4. Is the original design of majority of culverts
  based on a 10-, 20-, 50-, or 100-year flood or
  other than these?

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Culvert Inventory Questions

• 5. Does your DOT have a culvert dictionary?

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Culvert Inventory Questions

• 6. Do you have any failure cases reported?
• 75 of the agencies record the failure
  information
• 20 of the agencies do not record the failure
  information
• 5 of the agencies are working towards setting up
  a tracking system for failed culverts.

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Culvert Inventory Questions

• 7. How often do you inspect culverts located on
  state highways and interstates?

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Culvert Inspection and Decision Support System
(DSS) Questions

• 8. Does your agency have a standard set of
  inspection guidelines for culverts?
• Twenty six (26) DOTs responded to this question
  at a response rate of 76.

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Culvert Inspection and Decision Support System
(DSS) Questions

• 9. Which of the following are included in your
  inspection guidelines? (Drainage Inlet, Channel,
  Manholes, Junction Box, Headwall, Endwall,
  Wingwall, Footing and other components)

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Culvert Inspection and Decision Support System
(DSS) Questions

• 10. Does your agency have an inspection manual?
• The response rate was 74.
• 12 DOTs had compiled their guidelines in the form
  of an inspection manual
• 11 DOTs had not compiled their guidelines in the
  form of a manual
• 2 DOTs were in the development stage of the
  manual.

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Culvert Inspection and Decision Support System
(DSS) Questions

• 11. Which of the following factors are considered
  in the inspection guidelines? Please rank the
  factors in the order of their importance
  (Hydraulic capacity, Soil conditions, Joint
  Failures, Corrosion, Wall Thickness, Deflection
  and Cracking)

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Culvert Inspection and Decision Support System
(DSS) Questions

• 12. What factors are considered in replacing or
  renewing a culvert?

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Culvert Inspection and Decision Support System
(DSS) Questions

• 13. Is there a model or formula your state uses
  in order to predict the remaining service life of
  culverts?
• 78 of the respondents They had no model to
  predict the service life of culverts
• 13 of the respondents They were developing some
  kind of model or formula

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Culvert Inspection and Decision Support System
(DSS) Questions

• 14. Is it based on the condition assessment of
  culverts?
• 60 of the respondents The relationship was
  based on condition assessment of culverts
• 10 of the respondents It was based on other
  relationship. Thirty percent (30) of the
  responders said the relationship was under
  development stage.

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Culvert Inspection and Decision Support System
(DSS) Questions

• 15. Explain briefly how you overcome confined
  space problems while inspecting culverts
• 26 of the respondents Use CCTV to inspect and
  analyze the condition of their culverts
• 35 of the respondents Inspect the inlets,
  outlets and other outer components of the culvert
  and inside is not inspected.
• 39 of the respondents Use other methods

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Culvert Inspection and Decision Support System
(DSS) Questions

• 16. What are the major structural or hydraulic
  culvert problems do you encounter in your
  culverts statewide?

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Culvert Inspection and Decision Support System
(DSS) Questions

• 16. What are the major structural or hydraulic
  culvert problems do you encounter in your
  culverts statewide?

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Culvert Inspection and Decision Support System
(DSS) Questions

• 17. What are the major repair methods do you use
  for aforementioned problem?

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Culvert Inspection and Decision Support System
(DSS) Questions

• 18. What are the major renewal methods you use
  for problems listed in question 16?
  (Cured-In-Place Pipe, Sliplining, Pipe Bursting,
  Other)
• 64 of the respondents Use sliplining
• 18 of the respondents Use Cured-in-place pipe
• 8 of the respondents Use Pipe Bursting

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Culvert Inspection and Decision Support System
(DSS) Questions

• 19 and 20. Does your culvert have a computer
  database inventory and what software do you use?
• 52 of the respondents Have some kind of
  tracking and monitoring system for culverts
• 19 of DOTs are developing some kind of model or
  system to track the culverts.
• The state of Virginia uses HTRIS, PONTIS and
  ORACLE for managing their culverts
• Idaho and Delaware use PONTIS
• California stores all their culvert information
  in MS ACCESS
• Alaska, Indiana, Ohio and Alberta have their own
  in-house software
• Ontario has OBMS in Visual Basic software.

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Culvert Inspection and Decision Support System
(DSS) Questions

• 21. Do you have a Decision Support System (DSS)
  for selection of a specific method for renewal or
  repair or renewal of old and deteriorated
  culverts?
• 23 DOTs responded to this question
• 83 of the respondents Have no DSS for culverts.
  
• 13 of the respondents Have some kind of DSS
• 4 of the respondents In the development stage.

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Culvert Inspection and Decision Support System
(DSS) Questions

• 22. Do you have a model for integrating culvert
  inventory and condition assessment to predict the
  life cycle performance of culvert?
• 62 of the participants responded to this
  question.
• 67 of the respondents Have no model to
  determine the performance of culverts.
• 19 of the respondents Have some model to
  determine the culvert performance

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Culvert Inspection and Decision Support System
(DSS) Questions

• 23. How do you rate the importance of culvert
  asset management in your state?