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9 Hazard Identification
Table 9.2 Various “families” of elements with the potentially impinging hazards
General element
of the system
Hazard scenario
Vector,
threatfrom
code
Effects and
mechanism
Possible evolution
to ultimate failure
Pipelines
(tailings and
dewatering
(pond, polishing
ponds, ditches))
Traffic (includes
contractors and snow
removal collisions)
G4, G5,
P1
Spill from minor
to full break in
pipeline and
other collision
effects
Dam erosion/sloughing/local
to general
instability
(including
liquefaction)
Freezing (includes
deformations at
flanges)
G4, G5
Spill from minor
to full break in
pipeline
Sabotage/vandalism,
cyber
P4, A1,
A2, A3
Corrosion and
intrinsic mechanical
failures
F1
Human
(communication
between mill and
tailings operation), IT
P1, E1,
F1
Confining
structures (and
their content)
Geotechnical/geological
and climatological,
hydrological
G1, G6
Settlement,
deformation,
seepage/piping,
high pore
pressure, cracks,
inadequate
water balance,
static
liquefaction,
dynamic
liquefaction
Erosion, inadequate
storage capacity,
local to general
instability
(including
liquefaction)
flooding
downstream
Construction/building
operations
P1, P3,
P4
Operation,
maintenance and
monitoring during
service and record
keeping, IT
P1, P2,
P3, E1
Sabotage/vandalism,
cyber
A2, A3
Outlet structures
(spillways/pond
to pond culverts)
Geotechnical/geological
and hydrological
(capacity, durability)
G1, G4,
G5, G6
Unsatisfactory
performance,
over-topping of
the crest
Related dam
overtops, plug
bursts,
seiche/flooding
downstream
Operations (service,
emergency access), IT
E1, E2,
P1, P3
Water balance
management
G2, G6
Exceeds
capacity
Climate (includes
extreme freezing)
G5
Reduced
discharge
Sabotage/vandalism,
cyber
P4, A1,
A2, A3
Breaching the
crest
Seiche/flooding
downstream