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The BNSF derailment at Doon, Iowa
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<p>Who said the bridge caused the derailment? No need to convey to "us", we know it.</p> <p>It is a different question beside the cause of the accident. Was the high water level so unusual high that a reduced speed would have been appropriate. Depending on the accident's cause it might not have happened or the aftermath might have been less severe.</p> <p>The question to answer was the high water unusual. I think yes others think otherwise. I had hoped Jeff Hergert might share his view of how UP handels such situation. He decided against it and is his right.</p> <p>To put the flooding into perspective I look at the discharge at the Rock River gage near Rock Valley. Discharge at around 2:00 am on June 22, 2018 was about 35,000 cubic feet per second. <a href="https://waterdata.usgs.gov/nwis/uv?cb_00060=on&cb_00065=on&format=gif_default&site_no=06483500&period=&begin_date=2018-06-18&end_date=2018-06-25">https://waterdata.usgs.gov/nwis/uv?cb_00060=on&cb_00065=on&format=gif_default&site_no=06483500&period=&begin_date=2018-06-18&end_date=2018-06-25</a></p> <p>In the time frame from 1947 to 2018 this discharge was only exceeded in 1969 (40,400) and 2014 (60,600). <a href="https://nwis.waterdata.usgs.gov/nwis/peak?site_no=06483500&agency_cd=USGS&format=html">https://nwis.waterdata.usgs.gov/nwis/peak?site_no=06483500&agency_cd=USGS&format=html</a></p> <p>Everybody can draw his own conclusions.</p> <p>And again, though there is rule 6.21, I think it was the job of MofW and Engineering to impose speed restrictions if necessary not the crew's.<br />Regards, Volker</p>
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