Tower Construction at KOAC - TV
Corvallis, Oregon
Page 3

Prime contractor, LeBlanc Broadcast Corp.

After concluding that the original rock anchor system would not work in the soil
conditions found on Vineyard, LeBlanc decided to install a "deadman" type of anchor
foundation.  The ground was excavated to a depth of 13 feet, framed in with re-bar, and filled
with concrete to a depth of 4 feet.  On the left is the back fill operation, replacing the soil
on top of the concrete anchor.  The picture on the right is the finished guy anchor.

Finally the steel that would become the new KOAC tower arrives!  Bridge strand
for the guy wires, 90 degree angles for the cross pieces, and 60 degree angles for
the tower legs.

(Left) When unassembled, the tower steel dosn't look like much.
(Right) The large top mounting flange that will support the stacked UHF/ VHF antennas.

The tower sections are assembled on a special template jig.  Once assembled, the sections
are set aside for later joining into the larger tower length.

Above is a gallery of pictures showing the assembly progress.

OPB Director of Engineering, RF Systems, Everett Helm, and KOAC Chief Engineer
Roger Domingues, inspecting, and monitoring the tower section assembly progress.

Go To Previous Page