Assessing, Coding, and Marking of Highway Structures in Emergency Situations, Volume 2: Assessment Process Manual (2016) / Chapter Skim
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Pages 41-54
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From page 41... ...
41 C H A P T E R 5 5.1 Assessment Stages Highway structures will be assessed during an emergency situation using a four-stage process: Fast Reconnaissance, Preliminary Damage Assessment, Detailed Damage Assessment, and Extended Investigation. The primary scope of this document is to address the FR and PDA stages.
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From page 42... ...
42 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual • Crowdsourcing. Live video from SHA cameras or other sources, such as the media or the general public, may be used for an initial assessment on the condition of severely damaged structures.
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From page 43... ...
Assessment Process 43 estimates of the structures, which are used for prioritizing DDA. These estimates also could be used to develop preliminary damage cost estimates for the incident that can be refined with DDA and EI.
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44 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual The PDA should be conducted by a team of at least two PDARs. The following list outlines the general PDA procedure to be used for all structures: 1.
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Assessment Process 45 11. PDARs provide an element damage-level ranking (none, minor, moderate, severe)
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46 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual 5.2 Response Levels Responses levels relate to the immediacy of the response, the level of resources, and the effort that will be put into a response during an emergency event. They are essentially a status alert that can help ensure everyone is on the same page as to the magnitude of the response effort.
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Assessment Process 47 ME = Managing Engineer Figure 5-2. Response level process flowchart.
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48 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual severity and geographic extent of the emergency event. Upon receiving an emergency notification, emergency management officials should first validate it.
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Assessment Process 49 Several factors influence a tsunami's impact; therefore, the following factors should be considered when determining a response level for a tsunami event. • Tsunami inundation and height is highly variable due to local topographic effects.
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50 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual • Local earthquakes of relatively lower magnitudes may generate a tsunami causing more damage than a larger magnitude earthquake with the epicenter farther away. • Runup and damage due to a tsunami are related to the phase of the tide when the tsunami impacts.
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From page 51... ...
Assessment Process 51 Tornados are classified by the EF scale and have wind speeds from 65 to over 200 mph (NOAA/ NWS 2014c)
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From page 52... ...
52 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual Once the event subsides and it is deemed safe, PDA evaluations should begin. Hurricane events can cause varying levels of geographic damage; therefore, the following considerations should be used when determining response levels: • The geographic extent of hurricanes is difficult to predict.
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From page 53... ...
Assessment Process 53 Response Level Storm Surge Height Description of Response I < 5 ft The managing engineer will monitor the development, progress, and location of storm surge heights. Storm surge maps should be developed highlighting areas of prolonged exposure to storm surge wave loading.
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From page 54... ...
54 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual na = not applicable Source: Based on NOAA/NWS (2014g)
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