Helicopter restrings transmission lines across Fraser River

Two separate transmission lines cross the Fraser River near the Port Mann Bridge: a 230-kilovolt line and a 500-kilovolt line. On July 4, 2011, a transmission tower on the south side of the river carrying the 230-kilovolt line fell into the river after its foundation was compromised, likely due to accelerated erosion caused by high river levels.

Last August, BC Hydro devised an innovative plan to install high-tension, low-sag and significantly longer composite lines across the Fraser River. By using these specialized high-tension, low sag lines and stronger towers, the fallen tower will not require replacement as the new lines can be suspended over a longer span.
On November 19 a low flying helicopter flew five industrial guide-ropes, one at a time, between the tower on the north side of the Fraser River to a tower on the south side. It took approximately 30 minutes to fly each rope across from the north tower to the south tower.

BC Hydro worked with Allteck Line Contractors and VIH Aviation Group to install the new high-tension, low-sag lines.

For more information visit http://www.bchydro.com/mediacentre

Category:

News & Politics

Tags:

• BC Hydro
• Fraser River
• Tower Restoration
• fallen transmission tower
• power outage
• Surrey
• Port Mann Bridge
• high tension
• low sag

[DCDDesignAndMfg]

You called in the big bird for this job! Line tension was high enough to call for a 205?

Nice footage!

[biniballmvp]

this explains why i saw a heli hovering - normally see the coppers hovering like this!