Cda Dam Safety Guidelines Tofc 3e6336

Canadian Dam Association Dam Safety Guidelines

TABLE OF CONTENTS PREFACE .....................................................................................................................iii 1.

PRINCIPLES.........................................................................................................1 1.1 1.2 1.3 1.4 1.5

2.

Dam Safety Management....................................................................................................1 Operation, Maintenance, and Surveillance......................................................................5 Emergency Preparedness....................................................................................................8 Dam Safety Review............................................................................................................10 Analysis and Assessment.................................................................................................11

DAM SAFETY MANAGEMENT....................................................................14 2.1 Introduction........................................................................................................................14 2.2 Overall Process...................................................................................................................15 2.3 Elements of Management System...................................................................................16 2.3.1 2.3.2 2.3.3 2.3.4 2.3.5 2.3.6

Policy...........................................................................................................................16 Planning......................................................................................................................17 Implementation..........................................................................................................17 Checking and Reviewing..........................................................................................18 Corrective Actions.....................................................................................................18 Reporting....................................................................................................................19

2.4 ing Processes........................................................................................................20 2.4.1 2.4.2 2.4.3

Training and Qualification.......................................................................................20 Program Communication.........................................................................................20 Record Keeping and Management..........................................................................21

2.5 Inundation, Consequences, and Dam Classification....................................................22 2.5.1 2.5.2 2.5.3 2.5.4

3.

Introduction...............................................................................................................22 Dam-Breach Analysis and Inundation Mapping...................................................22 Dam Failure Consequences......................................................................................23 Dam Classification.....................................................................................................25

OPERATION, MAINTENANCE, AND SURVEILLANCE.......................27 3.1 3.2 3.3 3.4

Introduction........................................................................................................................27 OMS Manual.......................................................................................................................27 Project Description.............................................................................................................28 Operation............................................................................................................................29 3.4.1 3.4.2 3.4.3 3.4.4

Operating Criteria and Constraints.........................................................................29 Data Requirements....................................................................................................29 Operating Procedures...............................................................................................30 Flow Control..............................................................................................................32

3.5 Maintenance........................................................................................................................33 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 3.5.7 3.5.8

Maintenance Programs.............................................................................................33 Concrete Structures...................................................................................................33 Embankment Structures...........................................................................................34 Steel Structures..........................................................................................................34 Spillway Structures...................................................................................................34 Penstocks, Tunnels, and Pressure Conduits...........................................................34 Other Dam Structures...............................................................................................35 Infrastructure.............................................................................................................35

Canadian Dam Association Dam Safety Guidelines 3.6 Surveillance.........................................................................................................................35 3.6.1 3.6.2 3.6.3 3.6.4

General........................................................................................................................35 Visual Inspections......................................................................................................36 Dam Instrumentation................................................................................................37 Documentation and Follow-Up...............................................................................37

3.7 Maintenance and Testing of Flow Control Equipment................................................38

4.

EMERGENCY PREPAREDNESS....................................................................39 4.1 Introduction........................................................................................................................39 4.2 Emergency Response Plan................................................................................................40 4.2.1 4.2.2 4.2.3

General........................................................................................................................40 Activation of Plan and Initial Response..................................................................41 Contents of Emergency Response Plan...................................................................42

4.3 Emergency Preparedness Plan.........................................................................................45 4.3.1 4.3.2

General........................................................................................................................45 Contents of Emergency Preparedness Plan............................................................46

4.4 Municipal or Local Emergency Plans.............................................................................48 4.5 Training, Testing, and Updating.....................................................................................48

5.

DAM SAFETY REVIEW...................................................................................49 5.1 5.2 5.3 5.4

Introduction........................................................................................................................49 Review Engineer................................................................................................................49 Frequency of Review.........................................................................................................49 Scope and Content of Review..........................................................................................51 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.4.7 5.4.8 5.4.9

General........................................................................................................................51 Site Inspection and Staff Interviews........................................................................51 Data and Records.......................................................................................................52 Consequences of Dam Failure..................................................................................53 Dam Safety Analysis.................................................................................................53 Operation, Maintenance, and Surveillance.............................................................54 Emergency Preparedness.........................................................................................55 Public Safety and Security........................................................................................55 Dam Safety Management System............................................................................55

5.5 Dam Safety Review Report...............................................................................................56

6.

ANALYSIS AND ASSESSMENT...................................................................57 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9

Introduction........................................................................................................................57 Risk-Based Approach........................................................................................................58 Traditional Standards-Based Approach.........................................................................61 Hydrotechnical...................................................................................................................63 Seismic.................................................................................................................................66 Geotechnical.......................................................................................................................68 Structural.............................................................................................................................72 Mechanical and Electrical.................................................................................................74 Other Considerations........................................................................................................76

ACRONYMS................................................................................................................77 GLOSSARY..................................................................................................................79

Canadian Dam Association Dam Safety Guidelines TECHNICAL BULLETINS 1.

Inundation, Consequences, and Classification for Dam Safety

2.

Surveillance of Dam Facilities

3.

Flow Control Equipment for Dam Safety

4.

Public Safety and Security Around Dams (DRAFT)

5.

Dam Safety Analysis and Assessment

6.

Hydrotechnical Considerations for Dam Safety

7.

Seismic Hazard Considerations for Dam Safety

8.

Geotechnical Considerations for Dam Safety

9.

Structural Considerations for Dam Safety