Appendix
Grading & Erosion Control Plan - Phase 7
June 14, 2016Page 1582 sections
Comprehensive engineering plan for site grading and erosion management.
Thetis Vale Phase 7Associated Engineering
Page 158
THETIS VALE PHASE 7 - GRADING & EROSION CONTROL PLAN
Project Information
- Project No.: 2014-2701
- Scale: 1:500
- Client: LIMONA CONSTRUCTION
- Drawing Number: 2701-00-C-107
- Revision: H (May 13, 2018)
- Sheet: 11
Requested Variances
Handwritten notes on the plan indicate the following requested variances:
- Pink Square Symbol: LOTS WITH REDUCED DRIVEWAY PARKING LENGTHS
- Yellow Square Symbol: RETAINING WALLS
Sediment & Erosion Control Notes
- 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.
- EXISTING MANHOLES & CATCHBASINS ON CHILCO ROAD TO BE PROTECTED WITH FILTER CLOTH & CLEANED REGULARLY THROUGHOUT CONSTRUCTION.
- 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.
- SILT FENCE TO BE INSTALLED AS DIRECTED BY ENGINEER ON STEEP SLOPES TO REDUCE OVERLAND RUNOFF FLOW VELOCITIES AND RESULTANT SEDIMENTATION AND EROSION.
- SWEEPING PROGRAM TO BE IN PLACE TO ENSURE SOIL DOES NOT ACCUMULATE ON CHILCO ROAD.
- HAY BALE SILT FENCING TO BE INSTALLED IN DOWNSTREAM DITCHES TO ENSURE REMOVAL OF SEDIMENT FROM RUNOFF.
- EXISTING VEGETATION TO BE MAINTAINED UNTIL REMOVAL IS NECESSARY TO COMMENCE CONSTRUCTION ACTIVITIES.
- VEGETATED BUFFER STRIP TO BE MAINTAINED WHERE POSSIBLE AROUND CONSTRUCTION SITE PERIMETER UNTIL REMOVAL IS REQUIRED FOR CONSTRUCTION OR LANDSCAPING.
- ALL SEDIMENT AND EROSION CONTROL MEASURES ARE TO BE REMOVED BY CONTRACTOR ONLY AFTER VEGETATION IS ESTABLISHED AND EROSION/SEDIMENTATION DOES NOT OCCUR.
Legend
| Symbol | Description |
|---|---|
| — — — | MINIMUM LIMIT OF LOT GRADING |
| — — — | BOULDER WALL LIMITS |
| — • — | SILT FENCE |
| 40.8 | UNDERSIDE OF FOOTING ELEVATION (CUT) |
| [40.8] | UNDERSIDE OF FOOTING ELEVATION (FILL) |
| (X.X) 39.50 | PROPOSED GRADE & ROAD CENTERLINE |
| (45.0) | LOT PAD EXCAVATION ELEVATION |
| 1.5 | WALL HEIGHT |
Detail Drawings
The plan includes the following engineering details:
- Detail 1: CATCH BASIN SILTATION CONTROL (NTS) - Shows filter fabric and wire mesh over catch basin with sediment traps.
- Detail 2: HAY BALE SILT FENCE (NTS) - Shows installation of straw bales, filter fabric, and compact soil for erosion control.
- Detail A: TYP. SECTION @ LOT 29 (NTS) - Profile showing grading and section view.
- Detail 3: SILT FENCE (NTS) - Shows installation of woven filter fabric secured to T-bar posts.
Revision History
| NO. | DATE | ENG | BY | SUBJECT |
|---|---|---|---|---|
| E | JUL 3, 2015 | DD | DAH | ISSUED FOR APPROVAL |
| F | DEC 4, 2015 | DD | DAH | ISSUED FOR APPROVAL |
| G | MAR 2, 2016 | DD | DAH | ISSUED FOR APPROVAL |
| H | MAY 13, 2018 | DD | DAH | ISSUED FOR APPROVAL |
Site Plan Annotations
- Rock Cut: ½:1, TYP. HEIGHT 1-2m; 1:1 OTHERWISE & HYDROSEED SLOPE AS REQUIRED.
- Engineering Requirement: GEOTECH ENGINEER TO CERTIFY ALL ROCK CUTS AND MORTARED BOULDER STACKED WALLS.
- Benching: 1.5m WIDE BENCH REQUIRED WHERE CUT SLOPES OVER 6m.
- Protected Area: PROTECTED GREEN SPACE COVENANT.
- Boulder Walls: 1:1 STACKED BOULDER WALL IN THIS AREA (GEOTECH TO CERTIFY).
- Catchbasins: CATCHBASINS TO HAVE INLET PROTECTION INSTALLED - SEE DETAIL 1 (TYP.).
- Specific Walls: MORTARED ROCK WALL ADJACENT TO LOT 12 (NORTH SIDE ONLY).
- Silt Fence: SILT FENCE TO BE INSTALLED AS REQUIRED ON CONSTRUCTION SITE BOUNDARY TO CONTAIN SEDIMENT LADEN RUNOFF ON SITE. SEE DETAIL 3.
Page 158
Extracted from: 2016 06 14 Committee of the Whole Agenda