20170720 - Flooding Alg (hrb)

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Kayla Wolf - for Shaw Media United States Geological Survey Hydrologic technicians Matt Peterson (front) and Lisa Matson measure the flow of water in the Fox River on Thursday, July 20, 2017. The technicians make multiple trips across the bridge and find an average to determine the cubic feet per second of water flowing through the river.

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Kayla Wolf - for Shaw Media Algonquin resident Carrick Roggenbuck helps reinforce sandbags along the Fox River on Thursday, July 20, 2017. The water is expected to rise after the rains Wednesday night.

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Kayla Wolf - for Shaw Media Using a floating sensor the USGS measures the flow of water in the Fox River on Thursday, July 20, 2017 from the Algonquin Rd. bridge.

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Kayla Wolf - for Shaw Media USGS Hyrdologic Technician Lisa Matson records data on the flow of water in the Fox River on Thursday, July 20, 2017 in Algonquin. USGS monitors various waterways throughout Illinois and typically records measurements every six to eight weeks, but when there is flooding or other severe weather they measure more frequently.

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Kayla Wolf - for Shaw Media Algonquin residents Carrick Roggenbuck, front, and Dave Roggenbuck work on reinforcing the sandbag wall Thursday, July 20, 2017 in Algonquin along La Fox River Rd. Dave Roggenbuck said he has been sandbagging since July 12.