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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 o..."
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. For an example of municipal standards for as-built surveys, refer to the City of Toronto's [https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf Engineering Survey Standards for Consultants]<ref>City of Toronto. 2021. Engineering Survey Standards for Consultants. https://www.toronto.ca/wp-content/uploads/2017/11/98c7-ecs-specs-surveys-engsrv_survey_standards_for_consultant.pdf</ref>
'''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.
#Identify the type, diameter, and material of exposed utilities.
#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.
'''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.
#Identify the type, diameter, and material of exposed utilities.
#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.