With the recent concerns of flooding, combined with the insane growth in the Treasure Valley, the GUARDIAN thought it might be nice to put things in perspective.
A reader offered up a Bureau of Homeland Security link that is far too combersome to share, but the information shows us the floods are a regular event of nature. Threats to some areas have been reduced with flood control measures–especially at Lucky Peak Dam and at Cottonwood Creed near St. Luke’s Hospital.
We note the 100 year flood is probably overdue when in 1862 floodwaters were seen from the foothills to the bench with a flow estimated in excess of 100,000 cfs.
There was a big one in 1936 and 1943 as well:
Flood – April 25, 1936
“Event Summary: Boise River flood. Rain and melting snow combined to cause the Boise River to flood with a peak discharge est. at 19,700 cfs, the sixth largest recorded flood. 2 deaths were reported caused by the flood. Hundreds of acres of agricultural land in the valley was flooded along the river, through Eagle, Star, Linder and Parma. Spring runoff also led to flooding along the Payette River and Soldier Creek. After the flood, the legislature appropriated $10,000 to improve the river channel, modify the bridges, and clean out timber and debris from the river and its banks.
County Summary: Boise River flood from rain and melting snow. The river had a peak est. discharge of 17,700 cfs, its sixth largest recorded flood. 1,100 WPA workers manned the dikes through Boise. 2 deaths were reported: 1 man drowned at the Broadway Bridge, 1 WPA worker was struck by lightning (two coworker received burns, but survived). The Strawberry Glen bridge was washed out, and the highway east of Linder bridge was destroyed by floodwaters. Roads along the river in Boise were washed out, and the Davis Meat Packing Plant was inundated by water, damaging the goods stored there.”
HERE IS A LINK TO HISTORICAL SUMMARY OF FLOODS IN THE BOISE AREA, courtesy of Homeland Security of Idaho.
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