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Created page with "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.<sb> Survey Steps: #Use the same datum as the pre-engineering survey #If a pre-engineering survey is not available, use a ref..."
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.<sb>
Survey Steps:
#Use the same datum as the pre-engineering survey
#If a pre-engineering survey is not available, use a reference feature as the datum
#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.)
#Identify the type, diameter, and material of exposed utilities
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
Survey Steps:
#Use the same datum as the pre-engineering survey
#If a pre-engineering survey is not available, use a reference feature as the datum
#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.)
#Identify the type, diameter, and material of exposed utilities
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