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Finishing grades and surface layer installation: vegetated LIDs (view source)
Revision as of 22:05, 23 November 2022
, 1 year ago→Soil media and amendments
==Soil media and amendments==
==Soil media and amendments==
[[File:P1090179 SlingerTruck.jpg|450px|thumb|right|Slinger truck applying soil media in bioretention project. (Photo source: CVC)]]
Bioretention can be constructed over any soil type, but [[Soil groups|hydrologic soil group A and B]] are best for achieving water balance objectives. Facilities designed to infiltrate water should be located on portions of the site with the highest infiltration rates. STEP has detailed construction guidance on soil amendments available on its [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/healthy-soils/construction-specifications-for-implementing-compost-amended-planting-soil-in-ontario/ Construction Specifications for Implementing Compost Amended Planting Soil in Ontario]<ref>STEP. 2019. Construction Specifications for Implementing Compost Amended Planting Soil in Ontario: https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/healthy-soils/construction-specifications-for-implementing-compost-amended-planting-soil-in-ontario/</ref>. These resources include specification details and a spreadsheet calculator for determining soil and amendment volumes.
Bioretention can be constructed over any soil type, but [[Soil groups|hydrologic soil group A and B]] are best for achieving water balance objectives. Facilities designed to infiltrate water should be located on portions of the site with the highest infiltration rates. STEP has detailed construction guidance on soil amendments available on its [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/healthy-soils/construction-specifications-for-implementing-compost-amended-planting-soil-in-ontario/ Construction Specifications for Implementing Compost Amended Planting Soil in Ontario]<ref>STEP. 2019. Construction Specifications for Implementing Compost Amended Planting Soil in Ontario: https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/healthy-soils/construction-specifications-for-implementing-compost-amended-planting-soil-in-ontario/</ref>. These resources include specification details and a spreadsheet calculator for determining soil and amendment volumes.
#Apply soil media with slinger trucks when possible. This type of equipment will reduce the need to move soil media manually or by backhoe.
#Apply soil media with slinger trucks when possible. This type of equipment will reduce the need to move soil media manually or by backhoe.
#Thoroughly wet each lift before adding the next and wait until water has drained through the soil before adding the next lift.
#Thoroughly wet each lift before adding the next and wait until water has drained through the soil before adding the next lift.
#Installed soil media should be firm to footprints when dry.
#If amending soils:<br>
#If amending soils:<br>
#*Stockpile native soils in designated areas.
#*Stockpile native soils in designated areas.
Similar to the plant material verification and installation task shown above, any planting required to stabilize the contributing drainage area will need to meet the specifications and considerations shown above.<br>
Similar to the plant material verification and installation task shown above, any planting required to stabilize the contributing drainage area will need to meet the specifications and considerations shown above.<br>
Additionally, if [[turf]]/grass is required to stabilize the contributing drainage area, installation should be done as per the grower/nursery’s specifications and standards.
Additionally, if [[turf]]/grass is required to stabilize the contributing drainage area, installation should be done as per the grower/nursery’s specifications and standards. See [[turf reinforcement]] for more information.
==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. 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.
==Permanent fencing==
==Permanent fencing==