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* Concrete curbing
Items to ensure during construction:
For small LID facilities, apply soil media in 150-300 mm lifts until desired top elevation of bioretention, bioswale or rain garden area is achieved. Thoroughly wet each lift before adding the next and wail until water has drainer through the soil before adding the next lift. Avoid manual or machine compaction. If possible, equipment should not be operated within the infiltration practice. If required, allow soil to dry before equipment is allowed back into the practice.
Soil/filter media’s design parameters and assumptions should be confirmed through in-situ permeability testing (e.g., permeameter measurements to determine hydraulic conductivity). Results of permeability testing should be reviewed by the designer and, if required, changes to the LID design may be needed.
All exposed soil areas that are not being actively worked must have temporary erosion protection or permanent cover within 7 days for slopes 3:1 or greater and 14 days for slopes 3:1 or greater and 14 days for slopes 3:1 or flatter. This should apply to all exposed soil areas year-round and until the site is stabilized.
Upon material arrival to the site, make sure to conduct:*Grab a sample, ribbon test
→Backfill Granular and Pipes (SPC)
Construction Steps<br>
Construction Steps<br>
*Use the right forms to pour concrete
*Let concrete cure according to its specifications and curing time
Key Inspection Points<br>
Key Inspection Points<br>
*When pouring the concrete, making sure that the concrete truck is not inside the LID facility
*
Mistakes to avoid:<br>
Mistakes to avoid:<br>
*Elevated curb cuts and reverse slopes (sloping from back of curb towards instead of depressing from gutter line towards the back)
*Elevated curb cuts and reverse slopes (sloping from back of curb towards instead of depressing from gutter line towards the back)
*Curb cut width size
*Curb cut width size
*Placement of curb cuts on steep slopes or the down slope side of a catchbasin <br>
*Placement of curb cuts on steep slopes or the down slope side of a catchbasin<br>
{{:Curb cuts: Gallery}}
{{:Curb cuts: Gallery}}
* Vegetation: If sized correctly, it works more effectively in areas with more dispersed flow. However, in concentrated flow and sediment areas it might not be the best option. Sediment removal can be more difficult in areas of dense vegetation. An advantage of using vegetation as pre-treatment is that it can be easily integrated into the landscape design.
* Vegetation: If sized correctly, it works more effectively in areas with more dispersed flow. However, in concentrated flow and sediment areas it might not be the best option. Sediment removal can be more difficult in areas of dense vegetation. An advantage of using vegetation as pre-treatment is that it can be easily integrated into the landscape design.
* Concrete curbing
Construction steps:
Key Inspection Points:
*Verify that’s correct pretreatment device (jelly fish, vegetation, curbing, etc.)
*Verify that’s correct pretreatment device (jelly fish, vegetation, curbing, etc.)
*Correct size and location
*Correct size and location
*Correct elevation and footing
*Correct elevation and footing
*Tied into the curb? or could happen before the curbing?
*Is it tied into the curb? Or could happen before the curbing?
*Does it work?
*Does it work?
Mistakes to Avoid:
*Using wrong concrete forms if concrete curbs are selected
For more information about pre-treatment strategies and their design, visit these page: [[Pretreatment]] and [[Pretreatment features]]<br>
For more information about pre-treatment strategies and their design, visit these page: [[Pretreatment]] and [[Pretreatment features]]<br>
'''Soil Media / Filter Media'''<br>
'''Soil Media / Filter Media'''<br>
Bioretention can be constructed over any soil type, but 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.
Construction Steps
For large LID facilities, slinger trucks are recommended for spreading soil in even layers and reducing the need to move soil media manually or by backhoe. If possible, equipment should not be operated within the infiltration practice. If necessary, appropriate low ground pressure rated equipment can enter after at least 45 cm of bioretention, bioswale or rain garden soil is installed and has properly dried.
For small LID facilities:
*Apply soil media in 150-300 mm lifts until desired top elevation of bioretention, bioswale or rain garden area is achieved
*Thoroughly wet each lift before adding the next and wait until water has drained through the soil before adding the next lift.
For large LID facilities:
*Apply soil media in 150-300 mm lifts with slinger trucks. 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.
Key Inspection Points:
*When material arrives to the site: perform chain of custody, visual inspection and ribbon test to ensure that material meets design requirements.
*Ensure that soil media is being applied to the correct depth
Mistakes to Avoid:
*Chain of custody
*Machine compaction: Equipment should not be operated within the infiltration practice.
*Visual inspection
*Soil material: Accepting material that does not meet design specifications and requirements
*Soil material application: Applying the next lift without letting the previous lift of filter material dry.
*All exposed soil areas that are not being actively worked must have temporary erosion protection or permanent cover within 7 days for slopes 3:1 or greater and 14 days for slopes 3:1 or greater and 14 days for slopes 3:1 or flatter. This should apply to all exposed soil areas year-round and until the site is stabilized.
===Finishing Grades: Inlet, Outlet, Biomedia, Plants (SPC)===
===Finishing Grades: Inlet, Outlet, Biomedia, Plants (SPC)===