Construction Environmental Management Plan Appendices - Part 2

186 Pages·2016·22.66 MB·English

by  Jones, Iain

Erosion and Sediment Control Plan
Site C Clean Energy Project
Appendix I
Erosion and Sediment Control Plan
Site C Clean Energy Project
Revision 1: July 8, 2016
PPaaggee 112277 Revision 1: July 8, 2016
Erosion and Sediment Control Plan
Site C Clean Energy Project
Revision History
Version Date Comments
Rev 1 07-08-2016 Final Plan
PPaaggee 112288 Revision 1: July 8, 2016
SITE C CLEAN ENERGY PROJECT

WATER MANAGEMENT, EROSION AND
SEDIMENT CONTROL PLAN
Revision 1

Prepared by

Klohn Crippen Berger Ltd. and SNC-Lavalin Inc.

For

BC Hydro

1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
SITE C CLEAN ENERGY PROJECT

WATER MANAGEMENT, EROSION
AND SEDIMENT CONTROL PLAN
Revision 1

Prepared by

Klohn Crippen Berger Ltd. and SNC-Lavalin Inc.

For

BC Hydro
1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan - Revision 1 Page iii
SITE C CLEAN ENERGY PROJECT
WATER MANAGEMENT, EROSION
AND SEDIMENT CONTROL PLAN
Revision 1
Prepared by:
Winston Wade, MEM, P.Eng. Cory Turkington, CPESC
SNC-Lavalin Inc. SNC-Lavalin Inc.
Checked by:
Nicole Anderson, CPEng.
Klahn Crippen Berger Ltd.
Reviewed by:
Ali Siner, P.Eng. Brian McGhee, P.Eng. CEng. MICE
SNC-Lavalin Inc. Klahn Crippen Berger Ltd.
Accepted by:
Simon Douglas, P.Eng.
Klahn Crippen Berger Ltd.
t»
•)) 1016.Z.02.020.ENZ.00755. PLAN
Klohn Crippen Berger May 2016
SNC • LAVALIN
Not to be reproduced without the permission ofB C Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan – Revision 1 Page iv

DISCLAIMER
This plan was prepared by Klohn Crippen Berger Ltd. and SNC-Lavalin Inc. solely for
BC Hydro internal purposes. All other parties are third parties.

Neither BC Hydro nor Klohn Crippen Berger Ltd. nor SNC-Lavalin Inc. represents,
guarantees or warrants to any third party, either expressly or by implication:

(a) the accuracy, completeness or usefulness of;
(b) the intellectual or other property rights of any person or party in, or
(c) the merchantability, safety or fitness of purpose of,

any information, product or process disclosed, described or recommended in this plan.

Neither BC Hydro nor Klohn Crippen Berger Ltd. nor SNC-Lavalin Inc. accept any
liability of any kind arising in any way out of the use by a third party of any information,
product or process disclosed, described or recommended in this plan, nor do BC Hydro,
Klohn Crippen Berger Ltd. nor SNC-Lavalin Inc. accept any liability arising by way of
reliance by a third party upon any information, statement or recommendation contained
in this plan.

Should third parties use or rely on any information, product or process disclosed,
described or recommended in this plan, they do so entirely at their own risk.

COPYRIGHT NOTICE
© 2016 BC Hydro. This plan may not be reproduced in whole or in part without the prior
written consent of BC Hydro.
1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan – Revision 1 Page v

LIST OF ACRONYMS
ARD/ML Acid Rock Drainage/Metal Leaching
BCEAO BC Environmental Assessment Office
BCWGs British Columbia Water Quality Guidelines
BC British Columbia
BMP Best Management Practice
CDA Canadian Dam Association
CCME Canadian Council of Ministers of the Environment – Water Quality
Guidelines
CEMP Construction Environmental Management Plan
DBM Design Basis Memorandum
DFO Department of Fisheries and Oceans
El. Elevation
EM Environmental Manager/Monitor
EPP Environmental Protection Plan
ESC Erosion and Sediment Control
IET Integrated Engineering Team
KCB Klohn Crippen Berger Ltd.
LBE Left Bank Excavation
m metre
m/s metres per second
m³/s cubic metres per second
MCW Main Civil Works
MELP Ministry of Environment, Lands and of Parks
MEM Ministry of Energy and Mines
MOE Ministry of Environment
NBCC National Building Code of Canada
PCN Peace Canyon Dam
P Eng Professional Engineer
QP Qualified Professional
RCC Roller Compacted Concrete
RSEM Relocated Surplus Excavated Material
RUSLE Revised Universal Soil Loss Equation
SEV Severity of Ill Effects
SCS Soil Conservation Service
SLI SNC-Lavalin Inc.
WM Water Management
WQ Water Quality
WSC Water Survey of Canada

1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan – Revision 1 Page vi

SITE C CLEAN ENERGY PROJECT
WATER MANAGEMENT, EROSION AND
SEDIMENT CONTROL PLAN
REVISION 1
CONTENTS

Section Subject Page

EXECUTIVE SUMMARY ................................................................................................ IX 
1.  INTRODUCTION .................................................................................................. 1 
1.1  General ...................................................................................................... 1 
2.  ROLES AND RESPONSIBILITIES ....................................................................... 3 
2.1  BC Hydro ................................................................................................... 3 
2.2  Contractors ................................................................................................ 3 
3.  DESIGN BASIS FOR EROSION AND SEDIMENT CONTROLS ......................... 6 
3.1  Water Quality Criteria ................................................................................. 6 
3.2  Climate ....................................................................................................... 6 
3.3  Design Rainfall ........................................................................................... 8 
3.4  Runoff Coefficients .................................................................................... 8 
3.5  Temporary Structures ................................................................................ 8 
3.6  Sedimentation Pond Design ...................................................................... 9 
3.7  Reference Documents ............................................................................. 10 
4.  EROSION AND SEDIMENTATION CONTROLS ............................................... 11 
4.1  ESC Approach Preferences ..................................................................... 11 
4.2  Erosion Potential ...................................................................................... 12 
4.3  Erosion and Sedimentation Control Measures ......................................... 12 
4.4  ESC Measures ......................................................................................... 28 
5.  ESC CONTROLS FOR PROJECT AREAS ........................................................ 41 
5.1  General .................................................................................................... 41 
5.2  Left Bank Excavation ............................................................................... 43 
1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan – Revision 1 Page vii

SITE C CLEAN ENERGY PROJECT
WATER MANAGEMENT, EROSION AND
SEDIMENT CONTROL PLAN
REVISION 1
CONTENTS

Section Subject Page

5.3  RSEM Area L3 ......................................................................................... 44 
5.4  RSEM Area L5 ......................................................................................... 46 
5.5  RSEM Area L6 ......................................................................................... 48 
5.6  RSEM Area R5a and R5b ........................................................................ 49 
5.7  RSEM Area R6 ........................................................................................ 51 
5.8  Road Construction ................................................................................... 52 
5.9  Rail Siding ................................................................................................ 54 
6.  REFERENCES ................................................................................................... 56 

APPENDICES
Appendix A  ESC Best Management Practices 
Appendix B  Referenced Drawings 

TABLES
Table 3-1  Rainfall Intensity Duration Frequency at Fort St. John Airport Climate
Station (1973 - 2002) ................................................................................ 8 
Table 3-2  Sedimentation Pond Performance Criterion Guidelines ............................. 9 
Table 4-1  Suitability of ESC Practices for Various Construction Activities ............... 12 
Table 4-2  Application of Best Management Practices .............................................. 14 
Table 4-3  Suggested armouring of Drainage Channels ........................................... 32 
Table 4-4  ESC Considerations on Temporary Soil Slopes ...................................... 33 
Table 4-5  Suggested Minimum Slope Drain Diameter Based on Contributing Area 34 
Table 4-6  Suggested Spacing for Check Dams ....................................................... 35 
Table 5-1  Suggested ESC Measures by Area ......................................................... 42 
1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro
Site C Clean Energy Project
Water Management, Erosion and Sediment Control Plan – Revision 1 Page viii

SITE C CLEAN ENERGY PROJECT
WATER MANAGEMENT, EROSION AND
SEDIMENT CONTROL PLAN
REVISION 1
CONTENTS

Section Subject Page

Table 5-2  LBE ESC Measures ................................................................................. 43 
Table 5-3  RSEM AREA L3 ESC Measures .............................................................. 45 
Table 5-4  RSEM AREA L5 ESC Measures .............................................................. 46 
Table 5-5  RSEM AREA L6 ESC Measures .............................................................. 48 
Table 5-6  RSEM AREA R5a R5b ESC Measures .................................................... 49 
Table 5-7  RSEM Area R6 ESC Measures ............................................................... 51 
Table 5-8  Rail Siding ESC Measures ....................................................................... 54 

FIGURES
Figure 3-1 Mean Daily Temperature for Fort St. John ..................................................... 7 
Figure 3-2 Mean Monthly Precipitation for Fort St. John ................................................. 7 

Figure 1: Site Disturbance Overview and Catchment Maps
Figure 2: Schematic of LBE Hydraulic Flow Pathways and ESCs by Construction Phase
Figure 3: Schematic of RSEM Area L3 Hydraulic Flow Pathways and ESCs by
Construction Phase
Figure 4: Schematic of RSEM Area L5 Hydraulic Flow Pathways and ESCs by
Construction Phase
Figure 5: Schematic of RSEM Area L6 Hydraulic Flow Pathways and ESCs by
Construction Phase
Figure 6: Schematic of Area R5a and R5b Hydraulic Flow Pathways and ESCs by
Construction Phase
Figure 7: Schematic of Area R6 Hydraulic Flow Pathways and ESCs by Construction
Phase
Figure 8: Schematic of Septimus Siding Hydraulic Flow Pathways and ESCs by
Construction Phase

1016.Z.02.020.ENZ.00755.PLAN
May 2016

Not to be reproduced without the permission of BC Hydro