Brigham City officials are trying to figure out why hundreds of fish have died at Mantua River.
<p>MANTUA – Hundreds of dead fish are floating in the Mantua Reservoir.</p><p>This comes after the lake was treated for algae blooms.
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    <div class="single_image" style="cursor: pointer;" title="Hundreds of dead fish were found floating in the Mantua Reservoir in Box Elder Count
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