2001 Triple Bottom Line Report - BC Hydro

DAMS
Since 1982 BC Hydro has operated a formal dam safety
program and ongoing process to review, assess and document
the safety status of our dams, based on a comprehensive dam
safety management system. The program is ongoing, evolving
and respected internationally. New developments include
performance-based surveillance for early detection of aging
or deterioration in a dam, incorporating the latest technology
for automated instruments, remote video cameras, data
communications and alarm systems.
In 2000 BC Hydro initiated seismic safety investigations and
upgrading at dams in the Lower Mainland and on Vancouver
Island, including Coquitlam and Elsie dams.
POWER LINES
Public concern remains high about potential effects from exposure
to electric and magnetic fields (EMFs) around high-voltage
transmission lines. Findings of medical health studies are varied
and sometimes inconclusive. Last year we responded to 340
calls from customers requesting information about EMFs.
Other actions to promote knowledge of EMFs include:
• supporting EMF research by independent university
scientists, and monitoring and evaluating scientific
evidence on the effects of EMFs;
S O C I A L B O T T O M L I N E | 1 9
>
BC Hydro is committed to integrating
safety in all we do. We will conduct our
operations to minimize the chance of
injury to employees, contractors and
the public. We will effectively manage
the risks inherent in the generation,
transmission and distribution of
electricity, and promote its safe use.
We will meet or exceed the requirements
of all applicable regulatory agencies.
The work at Elsie dam, near Port Alberni on Vancouver Island,
followed identification of a loose layer at the upper portion of
the earthfill dam during a scheduled review of the dam in 1999.
The engineering analysis determined risk of dam failure or
damage in a major earthquake. Reservoir levels are being
maintained below the loose layer to ensure safety of the dam
while improvements are designed and implemented.
An improved spillway channel was constructed during 2000 to
maintain the reservoir below the safe level. The loose layer will
be repaired in 2001 and all dam improvements completed in
late 2002, at which time the dam will return to full service.
• encouraging and participating in utility, scientific and
technical forums to discuss EMFs and related issues;
• continuing to support the development of EMF standards
that are scientifically based; and
• providing loans of EMF measurement devices to customers
wishing to measure EMFs in their environment.