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Finishing grades and surface layer installation: permeable pavements (view source)
Revision as of 19:04, 28 October 2022
, 2 years ago→Curbing
==Curbing==
==Curbing==
[[File:20150618 114542.jpg|thumb|300px|right|Improper elevation at the curb cut, impeding the inflow to enter the LID facility (bioretention) (Photo source: CVC, 2015)]]
It is very important to make sure that the contractor responsible for curb construction understands curb cut designs and elevations. This is often a new technique for contractors, and they may not understand the overall concept of water in the gutter line being directed behind the gutter.<br>
'''Construction Steps:'''
#Place the right forms (rolled curve vs standard) in the inlet location.
#Pour concrete.
#Shape the inlet
#Add the river stone on top of the fresh concrete (if applicable)
#Provide sufficient curing time, according to ([https://www.csagroup.org/store/product/2420232/#:~:text=and%20specialty%20concretes.-,A23.,A%20sister%20standard%20%E2%80%93%20CSA%20A23 CSA, 2009])<ref> CSA. 2009. A23.1-09/A23.2-09 (R2014). Concrete materials and methods of concrete construction/Test methods and standard practices for concrete. standard A23.1-09. https://www.csagroup.org/store/product/2420232/#:~:text=and%20specialty%20concretes.-,A23.,A%20sister%20standard%20%E2%80%93%20CSA%20A23 </ref>
[[File:P1160129.jpg|thumb|325px|right|Ensure curb granular base (granular A) does not spill over into LID infiltration area. If material spills over, remove as best as possible while still maintaining the 2:1 slope for curbing. (Photo source: CVC, 2012)]]
'''Key Inspection Points:'''
*Use of proper curb form by sub-contractor.
*Curb type aligns with design.
*Curb cut location, type and dimension aligns with design.
*Designated concrete wash out is in place and away from LID facility.
'''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).
*Wrong curb cut width size.
*Use of wrong curb form.
*Concrete wash out within or upstream of LID facility.
*Ensure curb granular base (granular A) does not spill over into LID infiltration area. If material spills over, remove as best as possible while still maintaining the 2:1 slope for curbing
*Lack of communication to concrete contractor or ready-mix driver explaining the function and importance of protecting the LID feature.
For more information on curb cuts, see these pages: [[Curb cuts]], [[Curb cuts: Gallery]] and [[Bioretention: Streetscapes]]<br>
==Stabilizing contributing drainage area==
==Stabilizing contributing drainage area==