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       #Post#: 2213--------------------------------------------------
       On this day in history 2200 people die in a massive Pennsylvania
       flood (May 31) 😳 
   DIR By: Michael Caswell
       Date: May 31, 2022, 8:40 am
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       [attachimg=1]
       Read all about this tragedy here -
  HTML https://en.wikipedia.org/wiki/Johnstown_Flood
       [center]2209 people DEAD![/center]
       This Johnstown flood ranks as the worst flood event in US
       History, and sadly conditions exist along the Erie Canal that
       can cause a repeat here in NY State. Mainly because people still
       refuse to learn from their mistakes, and history can easily be
       repeated, due to ignorance of dam safety by the public at large.
  HTML https://abcnews.go.com/2020/story?id=2918360&page=1
       #Post#: 2214--------------------------------------------------
       Re: On this day (May 31)
   DIR By: Doug K
       Date: May 31, 2022, 2:15 pm
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       That's quite a bit of water, big dam.
       Now imagine a smaller version, along the Erie Canal, with only
       about 200,000 tons of water crushing everything in its path.
       But the real issue in a flood is drowning and according to the
       soon to be released Earthen Embankment Integrity Program SEQR
       package, that's about 340 million gallons of water to deal with.
       And that water will spill out of a 150' long tear, in the side
       of a canal navigation dam, and flow for 90 minutes until the
       water can be stopped by floodgates and coffer dams.
       It's all right here->
  HTML https://www.canals.ny.gov/Earthen_Embankment/DGEIS/NYSCC_EEIP_Draft_GEIS_3-12-2021_Combined.pdf
       The words are on page 3-16 and describes the "do nothing
       approach" to the overgrown earthen embankments, which will lead
       to failure.
       [i][color=purple][center]3.2.3 Potential Impact of Alternatives
       Under the Null or No-Action Alternative, any earthen embankments
       would be left to fail. Prior to
       any such failure, there would be no measurable impact to land
       use within the canal right-of-way
       or at adjacent property. At such time that the embankments would
       fail, water contained within
       the canal prism would be rapidly released. The risks associated
       with such an event are described
       in Appendix B. Depending on the location of the breach, the
       surrounding area would be
       inundated to various depths depending on topography.
       A breach in a canal or feeder embankment having a water depth of
       12 feet is estimated to occur
       over 1½ hours, enlarge to 150 feet wide and discharge a peak
       flow of between 5,000 and 10,000 cfs.
       The resulting flood wave would seriously impact existing land
       uses for the inundated terrain outside
       the canal limits. In addition to potential loss of life and
       damage to infrastructure, most of the flooded
       lands would be rendered unusable until restoration projects were
       completed. Lack of financial
       capability to fund restoration work could leave some areas
       unusable for an extended period of
       time.[/center]
       Engineers get paid to do calculations, which is how those
       figures above were found. 5000 to 10000 cubic feet of water per
       second is a lot. Use the middle point, 7500, and thats for 90
       minutes, or 5400 seconds. The numbers get large fast. Cubic feet
       to gallons of water is a internet calculator, along with the
       weight of 340 million gallons of water. 2000 lbs per ton is a
       standard number, known by most... you do the math.
       Now add height to the equation, is the impounded water 15 feet
       overhead or is it 50 feet? Higher creates a bigger debris field,
       according to another "potential impact" of leaving trees growing
       on Erie Canal Embankments. Don't be deceived by Facebook
       discussions, this is a potential for disaster and should drive a
       bit more public awareness.
  HTML https://rochesterbeacon.com/2019/07/02/trees-on-dams-are-a-high-risk-danger/#comment-64553
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