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View Full Version : 2010 Hibb's Island-Dike Repair [Article]


MadisonBoats
04-08-2011, 10:15 AM
I was cleaning up my PC today and came across a TVA Articled detailing the 2010 Hibb's Island-Dike Repair (Weir Dam). I do not think anyone posted this before(?). So; I figured I would share for those interested. I think TVA did an excellent job on this repair and I remember there being minimal impact on the fishing and ecosystem.:smile:

CITE: InsideTVA_Aug2010


Dike Repaired
on Hibbs Island
BY BROOKS CLARK

Rock and clay barrier will keep Clinch River water downstream from Norris Dam flowing over weir dams.

For 26 years, the dike on Hibbs Island — in the Clinch River about 2 miles south of Norris Dam — had done its job. When large amounts of water were released from the dam, the dike pushed the flow around the island and over the weir dams on either side. The weirs serve to gather the water in an upstream pool that ensures a steady release of 200 cubic feet per second when water is not being
released from the dam. The weirs also serve to increase the water’s dissolved-oxygen levels as it flows through auto-venting turbines.

Over time, heavy flows from Norris had washed away
portions of the dike, which meant the water flowed through the island and not over the weirs.

So during the last week in May a crew of contractors led by project manager Chuck Parkins, River Operations, and foreman Jeff Northern started moving bargeloads of large equipment, rocks and clay to build the dike back up.

After digging a 2-foot-deep trench, workers rebuilt a
75-foot section of the dike with layers of rock and clay to a height of about 4 feet. In all, it took 20 tons of clay and 175 tons of 8-to-12-inch stone.

“We measure project success on safety, quality, schedule
and budget,” says Parkins. “In every area this was a
successful project.”
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/205795_10150222883233319_718858318_8511639_1716284 _n.jpg
http://a3.sphotos.ak.fbcdn.net/hphotos-ak-ash4/207459_10150222883218319_718858318_8511637_6236115 _n.jpg
http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc6/208727_10150222883208319_718858318_8511636_5201221 _n.jpg

whitefeather
04-08-2011, 06:40 PM
Shawn,

These guys had the dream job I never could obtain. Thanks for posting this success story.

I've just got to get down to the Clinch sometime soon!