Analytical Assessment of the Proposed Raw Water Intake Pollutant Diversion Structure
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Analytical Assessment of the Proposed Raw Water Intake Pollutant Diversion Structure
Published Date
1997-12
Publisher
St. Anthony Falls Laboratory
Type
Report
Abstract
The St. Anthony Falls Laboratory was contracted by Short ElBott Hendrickson to
perform an assessment of potential sedimentation related issues associated with the
installation of a flow diversion structure at the Minneapolis Water Works raw water
intake. The Minneapolis Water Works raw water intake withdraws water from the
Mississippi river at approximately river mile 858.5, Following treatment, the water
becomes the primary water supply for Minneapolis and some suburbs. To continue to
operate following a contaminant spill upstream of the intake requires the installation of a
diversion structure which can effectively divert non~water soluble contaminants past the
intake structure.
The project involved the review of key riverine related issues including:
• The potential for siltation to occur in the region downstream of the
diversion structure between the island and intake.
• The potential for erosion of the far bank and the island caused by channel
constriction.
• The potential for de~pening of the primary channel due to the
constriction.
• The potential for sediment and contaminants to enter the downstream end
of the channel.
• The general stability of the island.
In addition to these issues, several secondary operational related issues were also
reviewed.
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The City of Minneapolis, water Works Dike Diversion
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Voigt, Richard L. Jr.; Kostic, Svetlana. (1997). Analytical Assessment of the Proposed Raw Water Intake Pollutant Diversion Structure. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/112976.
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