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Committee of the Whole/Documents/Grading & Erosion Control Plan
Appendix

Grading & Erosion Control Plan

May 12, 2015Pages 112–1131 section

Technical specifications for managing runoff and soil stability during construction.

9.2.3 a Mixed Residential Form and Character Development Permit No. 2014/10 - 2429 Chilco Road Lot 20 (Thetis Vale Phase 6 - 16 Duplex Residential Units)
Includes details for catch basin siltation control and hay bale silt fences

Grading & Erosion Control Plan - Thetis Vale Phase 6

Comprehensive site plan showing grading and erosion control measures for Thetis Vale Phase 6, including lot numbers 1 through 21, Cheam Road, Townhouse North, Townhouse East, and Chilco Road.
Comprehensive site plan showing grading and erosion control measures for Thetis Vale Phase 6, including lot numbers 1 through 21, Cheam Road, Townhouse North, Townhouse East, and Chilco Road.

Project Information

  • Project: Thetis Vale Phase 6
  • Drawing Title: Grading & Erosion Control Plan
  • Client: Limona Construction
  • Project No: 20132450
  • Drawing Number: 2450-00-C.107
  • Revision: C
  • Date: May 5, 2014
  • Status: PRELIMINARY NOT FOR CONSTRUCTION DRAFT

Revision History

No. Date By Subject
A Aug 1, 2013 DAH RE-ISSUED FOR APPROVAL
B JAN 14, 2014 DAH ISSUED FOR APPROVAL
C MAY 5, 2014 DAH ISSUED FOR REVIEW

Legend

  • MINIMUM LIMIT OF LOT GRADING: (Solid line)
  • BOULDER WALL LIMITS: (Line with circle pattern)
  • SILT FENCE: (Dashed line)
  • [40.8]: UNDERSIDE OF FOOTING ELEVATION (CUT)
  • 40.8: UNDERSIDE OF FOOTING ELEVATION (FILL)
  • [CL 38.30] / (42.20): PROPOSED GRADE & ROAD CENTERLINE
  • 45.9: LOT PAD EXCAVATION ELEVATION

Sediment & Erosion Control Notes

  1. SILT FENCE TO BE INSTALLED AS REQUIRED ON CONSTRUCTION SITE BOUNDARIES TO CONTAIN SEDIMENT LADEN RUNOFF ONSITE. SILTATION CONTROL MEASURES TO BE MONITORED AND CLEANED REGULARLY.
  2. EXISTING MANHOLES & CATCHBASINS ON CHILCO ROAD TO BE PROTECTED WITH FILTER CLOTH & CLEANED REGULARLY THROUGHOUT CONSTRUCTION.
  3. SILT FENCE TO BE INSTALLED AROUND BASE OF MATERIAL STOCKPILES. STOCKPILES TO BE COVERED AS REQUIRED DURING PRECIPITATION TO REDUCE EROSION AND WASHING OUT OF FINES.
  4. SILT FENCE TO BE INSTALLED AS DIRECTED BY ENGINEER ON STEEP SLOPES TO REDUCE OVERLAND RUNOFF FLOW VELOCITIES AND RESULTANT SEDIMENTATION AND EROSION.
  5. SWEEPING PROGRAM TO BE IN PLACE TO ENSURE SOIL DOES NOT ACCUMULATE ON CHILCO ROAD.
  6. HAY BALE SILT FENCING TO BE INSTALLED IN DOWNSTREAM DITCHES TO ENSURE REMOVAL OF SEDIMENT FROM RUNOFF.
  7. EXISTING VEGETATION TO BE MAINTAINED UNTIL REMOVAL IS NECESSARY TO COMMENCE CONSTRUCTION ACTIVITIES.
  8. VEGETATED BUFFER STRIP TO BE MAINTAINED WHERE POSSIBLE AROUND CONSTRUCTION SITE PERIMETER UNTIL REMOVAL IS REQUIRED FOR CONSTRUCTION OR LANDSCAPING.
  9. ALL SEDIMENT AND EROSION CONTROL MEASURES ARE TO BE REMOVED BY CONTRACTOR ONLY AFTER VEGETATION IS ESTABLISHED AND EROSION/SEDIMENTATION DOES NOT OCCUR.

Site Plan Annotations

  • 1.5m WIDE BENCH REQUIRED WHERE CUT SLOPES OVER 6m
  • GEOTECH ENGINEER TO CERTIFY ALL ROCK CUTS AND MORTARED BOULDER STACKED WALLS
  • SEE LANDSCAPE PLANS FOR TREE PROTECTION (TYP. FOR WHOLE SITE)
  • HAY BALE SILT FENCE REQUIRED AS PER DETAIL 2 PRIOR TO PIPE INSTALLATION
  • SILT FENCE TO BE INSTALLED AS REQUIRED ON CONSTRUCTION SITE BOUNDARY TO CONTAIN SEDIMENT LADEN RUNOFF ON SITE. SEE DETAIL 3.
  • Green Space Areas: 0.13 ha., 0.11 ha., 0.08 ha., 0.07 ha.

Construction Details

Detail 1 - Catch Basin Siltation Control. Technical diagram showing runoff water with sediment entering a catch basin through layers of 25mm min gravel, filtered water filter fabric, and wire mesh.
Detail 1 - Catch Basin Siltation Control. Technical diagram showing runoff water with sediment entering a catch basin through layers of 25mm min gravel, filtered water filter fabric, and wire mesh.

Additional Content

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Page 112–113
Extracted from: 2015 05 12 Committee of the Whole Agenda