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Culvert information management system : demonstration project, final report, August 2009.
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    Final report.
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  • Abstract:
    The overall objective of the research was to develop a pilot scale Culvert Information Management System (CIMS) that will

    comply with both requirements stipulated by the Governmental Accounting Standards Board (GASB-34) and new federal

    storm water regulations. A framework for inspection and rehabilitation/replacement of corrugated steel culvert pipes (culverts)

    is developed, and this report will form the basis for the creation of a computerized CIMS. The justification of the development

    of the CIMS is based on recent GASB-34 requirements. The CIMS will serve as a vehicle for evaluating underground

    infrastructure assets, specifically culverts, and facilitate computing present worth and comparing present costs of preserving

    them. Benefits of the CIMS will include long-term savings that should accrue from adopting optimized preventive

    maintenance strategies.

    The Condition States of culverts are used to express the extent of their deterioration. Different rehabilitation options are

    discussed and recommendations are made for deteriorated culverts. These options that will be incorporated into the CIMS,

    use survival probabilities based on the condition state of culverts. The survival probabilities for being in Condition States 1, 2,

    3 or 4 are computed based on minimal field data. However, the CIMS requires additional field data for culverts or laboratory

    tests that mimic field conditions to enhance this capability.

    The CIMS is capable of analyzing decisions to inspect, rehabilitate/replace or do nothing at both project and network levels.

    At the project level this is achieved by comparing inspection and/or rehabilitation/replacement costs with risks and costs

    associated with failure. At the network level, the associated costs are optimized to meet annual maintenance budget

    allocations by prioritizing culverts needing inspection and rehabilitation/replacement.

    The CIMS consist of three major computer software components: databases, user interfaces, and a data administration

    module. Secondary components include an inlet/outlet structures module and a culvert segments module. The inlet/outlet

    structures module will store all the storm water data such as the quality/quantity of water and the receiving and discharge

    watersheds. Users will be able to retrieve culvert and inlet/outlet information and generate reports via location and

    road/milepost for condition state and assets needing immediate repair. The CIMS will also do the following operations:

    • Maintain an up-to-date inventory of eligible infrastructure assets.

    • Perform condition assessments of eligible infrastructure assets at least every three years, using a replicable basis

    of measurement and measurement scale.

    • Summarize the results, noting any factors that may influence trends in the information reported.

    • Estimate yearly the annual amount needed to maintain and preserve the eligible infrastructure assets at or above a

    prescribed level.

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