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→Pretreatment and inlet
The [[construction]] guidance in this section applies to all sub-surface and ground-level LID practices: [[bioretention|bioretention gardens]], [[bioswales]], [[rain gardens]], [[exfiltration trenches]], [[enhanced swales]], [[permeable pavements]], [[infiltration trenches]], [[infiltration chambers]], and [[soakaways]]. In general, this section describes construction and inspection processes for below ground installed materials and infrastructure that are part of the LID practices noted above.
The [[construction]] guidance in this section applies to all sub-surface and ground-level LID practices: [[bioretention|bioretention gardens]], [[bioswales]], [[rain gardens]], [[exfiltration trenches]], [[enhanced swales]], [[permeable pavements]], [[infiltration trenches]], [[infiltration chambers]], and [[soakaways]]. In general, this section describes construction and inspection processes for below ground installed materials and infrastructure that are part of the LID practices noted above.
{{:Disclaimer}}
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==Trench, Chamber, and Perforated Pipe Installation==
==Trench, Chamber, and Perforated Pipe Installation==
The guidance provided in this section is applicable for the construction of soakaway pits, infiltration chambers, infiltration trenches, and exfiltration pipes of varying size and shape, since the installation of each of these features is similar. The [https://assets.ads-pipe.com/m/446afe5e1aafda1a/original/MC-7200-StormTech-Chamber-Installation-Guide.pdf StormTech Installation Guide]<ref>Advanced Drainage Systems. 2022. StormTech® Installation Guide MC-7200 Chamber. https://assets.ads-pipe.com/m/446afe5e1aafda1a/original/MC-7200-StormTech-Chamber-Installation-Guide.pdf</ref> is a key resource for understanding the construction of these features.
The guidance provided in this section is applicable for the construction of soakaway pits, [[infiltration chambers]], [[infiltration trenches]], and [[exfiltration trenches|exfiltration pipes]] of varying size and shape, since the installation of each of these features is similar. The [https://assets.ads-pipe.com/m/446afe5e1aafda1a/original/MC-7200-StormTech-Chamber-Installation-Guide.pdf StormTech Installation Guide]<ref>Advanced Drainage Systems. 2022. StormTech® Installation Guide MC-7200 Chamber. https://assets.ads-pipe.com/m/446afe5e1aafda1a/original/MC-7200-StormTech-Chamber-Installation-Guide.pdf</ref> is a key resource for understanding the construction of these features.
[[File:Chamber-excavator.jpg|400px|thumb|right|An excavator covering units of unfinished infiltration chamber rows with perimeter stone. Stone can be applied progressively as the rows are completed to ensure that space is provided for the excavator to work within the LID footprint. (Photo Source: [https://www.mswmag.com/g/product-focus/2015/08/stormwater_management_advanced_drainage_systems_stormtech_mc_4500 Municipal Sewer & Water])<ref> Municipal Sewer & Water. 2022. Photo. Accessed in July 8 2022:https://www.mswmag.com/g/product-focus/2015/08/stormwater_management_advanced_drainage_systems_stormtech_mc_4500</ref>]]
[[File:Chamber-excavator.jpg|400px|thumb|right|An excavator covering units of unfinished infiltration chamber rows with perimeter stone. Stone can be applied progressively as the rows are completed to ensure that space is provided for the excavator to work within the LID footprint. (Photo Source: [https://www.mswmag.com/g/product-focus/2015/08/stormwater_management_advanced_drainage_systems_stormtech_mc_4500 Municipal Sewer & Water])<ref> Municipal Sewer & Water. 2022. Photo. Accessed in July 8 2022:https://www.mswmag.com/g/product-focus/2015/08/stormwater_management_advanced_drainage_systems_stormtech_mc_4500</ref>]]
#If specified by the design, roll geotextile parallel to rows over the top of stone. Provide sufficient overlap, as specified by the manufacturer.
#If specified by the design, roll geotextile parallel to rows over the top of stone. Provide sufficient overlap, as specified by the manufacturer.
'''Note:''' where many rows of infiltration chambers are being installed, it may be advisable to construct the chamber rows piece-wise as the application of perimeter stone progresses to provide space for excavators to apply the stone from on top of the stone base. See the adjacent photo for an example.
<small>'''Notes:''' where many rows of infiltration chambers are being installed, it may be advisable to construct the chamber rows piece-wise as the application of perimeter stone progresses to provide space for excavators to apply the stone from on top of the stone base. See the adjacent photo for an example.</small>
'''Key Inspection Points:'''
'''Key Inspection Points:'''
==Pretreatment and inlet==
==Pretreatment and inlet==
Pre-treatment structures are most cost effective when they slow down incoming flows, collect sediment for easy clean out, and slowly release water to the bioretention facility mitigating erosion. [[Pretreatment]] structures/strategies can include [[curb cuts]], [[Aggregates]], proprietary devices like filters or hydrodynamic separators, vegetation, concrete sumps, membrane filters, overland flow sumps, etc.
Pre-treatment structures are most cost effective when they slow down incoming flows, collect sediment for easy clean out, and slowly release water to the bioretention facility mitigating erosion. [[Pretreatment]] structures/strategies can include [[curb cuts]], [[Aggregates]], proprietary devices like filters or [[Oil and Grit Separator|hydrodynamic separators]], [[vegetation]], [[Flow through riser|concrete sumps]], [[Pretreatment#Concentrated underground flow|membrane filters]], [[Pretreatment#Concentrated overland flow|overland flow sumps]], etc.
'''Construction Steps:'''
'''Construction Steps:'''