Will these low-water dams be safer than the current Zink Dam?
One of the primary goals of the project is to reduce hazards at the existing Zink Dam and to avoid the creation of hydraulic rollers at the South Tulsa/Jenks dam location. In this reach of the Arkansas River, numerous drownings have been recorded at the existing Zink Dam.
The proposed dam design involves constructing the downstream face of the dam with a series of steps that disrupt the formation of hazardous hydraulic roller conditions. Furthermore, the gate operational plan will prevent flow over the top of any full-height gate greater than six inches during non-flood release conditions.
In addition, the design includes installation of signage, warning systems and cabled buoys upstream of the dams to warn the public of potential dangers.
How will the low-water dams handle silt issues?
The dam design selected by City of Tulsa engineers and hydrologists utilizes a vulcanized rubber air bladder to raise and lower the steel dam gates to the full down position.
This modern dam technology is in use in cities around the world, on similar sized dams as well as on much larger dam gates.
As sediment builds next to a dam, officials will be able to lower the full height gates in that area completely flat onto the riverbed so the sediment and sand can flow downstream.
During periods of higher flows, sediment passage downstream can also be enhanced with the gates in the full down position at all of the dam locations.
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