Difference between revisions of "As-built surveys"

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====As-built Surveys====
====As-built Surveys====
Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction.<br>
Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction.


'''Survey Steps:'''<br>
'''Survey Steps:'''
#Use the same datum as the pre-engineering survey.
#Use the same datum as the pre-engineering survey.
#If a pre-engineering survey is not available, use a reference feature as the datum.
#If a pre-engineering survey is not available, use a reference feature as the datum.
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***Existing public utilities
***Existing public utilities
***Existing private utilities
***Existing private utilities
***New and existing structures (e.g., catchbasins, manholes, chambers, etc.)<br>
***New and existing structures (e.g., catchbasins, manholes, chambers, etc.)


'''Inspection Points:'''<br>
'''Inspection Points:'''
*Datum matches the pre-engineering survey or selected reference feature.
*Datum matches the pre-engineering survey or selected reference feature.
*Data provided in as-built survey matches the as-built standards of the local municipality.<br>
*Data provided in as-built survey matches the as-built standards of the local municipality.

Revision as of 14:24, 21 July 2022

As-built Surveys[edit]

Throughout the construction process, it is sometimes necessary to deviate from the intended design of LID features and adapt the design to on-site conditions. The completion of a post-construction as-built survey is a standard operating procedure for engineering projects that captures any changes made to the feature’s design during construction.

Survey Steps:

  1. Use the same datum as the pre-engineering survey.
  2. If a pre-engineering survey is not available, use a reference feature as the datum.
  3. Identify the type, diameter, and material of exposed utilities.
  4. Include data on critical feature elevations and existing utilities, such as:
      • Inverts of newly installed pipe
      • Vertical and horizontal bends in pipes
      • Existing public utilities
      • Existing private utilities
      • New and existing structures (e.g., catchbasins, manholes, chambers, etc.)

Inspection Points:

  • Datum matches the pre-engineering survey or selected reference feature.
  • Data provided in as-built survey matches the as-built standards of the local municipality.