Difference between revisions of "Construction: clearing and grubbing"

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===Excavation and mass grading: clearing and grubbing===
<u>Clearing and grubbing</u> is the stripping of vegetation and topsoil prior to excavation and rough grading within designated areas.
Clearing and grubbing is the stripping of vegetation and topsoil prior to excavation and rough grading within designated areas.
[[File:Scarification.JPG|400px|thumb|right|Scarifying native soils helps to increase infiltration rates. (Photo source: CVC, 2022)]]
[[File:Scarification.JPG|400px|thumb|right|Scarifying native soils helps to increase infiltration rates. (Photo source: CVC)]]
'''Construction steps'''  
'''Construction steps'''  
#Clear trees, large shrubs, stumps, etc. (grubbing).
#Clear trees, large shrubs, stumps, etc. (grubbing).
#Use appropriately sized machinery (e.g. a mini-excavator) to strip sod and ground-level vegetation (clearing).
#Use appropriately sized machinery (e.g. a mini-excavator) to strip sod and ground-level vegetation (clearing).
#Stockpile materials within designated areas if necessary. If the materials are being hauled offsite, stripped materials ideally would go straight into the back of a dump truck.
#Stockpile materials within designated areas if necessary. If the materials are being hauled offsite, stripped materials ideally would go straight into the back of a dump truck.
#Secure stockpiles with appropriate ESC measures if the material must be stored before hauling offsite or will be reused.
#Secure stockpiles with appropriate erosion and sediment control (ESC) measures if the material must be stored before hauling offsite or will be reused.
'''Key inspection points'''
'''Key inspection points'''
*Structural ESC measures are in place before clearing and grubbing begin.
*Structural ESC measures are in place before clearing and grubbing begin.
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*Contractor cleared and grubbed only within designated areas and according to the phasing plan.
*Contractor cleared and grubbed only within designated areas and according to the phasing plan.
'''Mistakes to avoid'''
'''Mistakes to avoid'''
*Clearing more area than is needed  
*clearing more area than is needed  
*Insufficient marking of areas to be protected
*insufficient marking of areas to be protected
*Stockpiling materials without ESC controls or for extended periods of time
*stockpiling materials without ESC controls or for extended periods of time
*Leaving heavy equipment in the facility’s footprint
*leaving heavy equipment in the facility’s footprint
*Making excessive passes with heavy equipment in the LID practice’s footprint without scouring soil afterward
*making excessive passes with heavy equipment in the LID practice’s footprint without scouring soil afterward

Latest revision as of 14:57, 22 September 2022

Clearing and grubbing is the stripping of vegetation and topsoil prior to excavation and rough grading within designated areas.

Scarifying native soils helps to increase infiltration rates. (Photo source: CVC, 2022)

Construction steps

  1. Clear trees, large shrubs, stumps, etc. (grubbing).
  2. Use appropriately sized machinery (e.g. a mini-excavator) to strip sod and ground-level vegetation (clearing).
  3. Stockpile materials within designated areas if necessary. If the materials are being hauled offsite, stripped materials ideally would go straight into the back of a dump truck.
  4. Secure stockpiles with appropriate erosion and sediment control (ESC) measures if the material must be stored before hauling offsite or will be reused.

Key inspection points

  • Structural ESC measures are in place before clearing and grubbing begin.
  • Natural heritage features, including trees, and construction limits are clearly marked and respected by the contractor.
  • Contractor cleared and grubbed only within designated areas and according to the phasing plan.

Mistakes to avoid

  • clearing more area than is needed
  • insufficient marking of areas to be protected
  • stockpiling materials without ESC controls or for extended periods of time
  • leaving heavy equipment in the facility’s footprint
  • making excessive passes with heavy equipment in the LID practice’s footprint without scouring soil afterward