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Hydraulic Calculations

  • Neil M. Coleman
Chapter

Abstract

Calculations are used to examine the hypothetical scenario described by Francis et al. (1891) in which they assert that the South Fork dam would have failed even had it been repaired as originally built in the 1850’s. Analysis I have added a sentence below to call out the footnote there. (This research relies on nineteenth century publications and more recent works that document historic data using English units rather than SI units. For most of the calculations I use the always preferable SI units, but when depending on old data sources the original English units are given. This approach will help confirm appropriate use of the nineteenth century data and will aid future workers who may further analyze this dam breach disaster) is provided for the pipe flows, flows through the main and auxiliary spillways, and the rate of storm runoff into Lake Conemaugh. Hydrographs were prepared to show how lake levels and discharges through the breach diminished over time. The lake required more than an hour to drain. The discharge capacity of the original dam is compared with the reduced discharge capacity of the dam as severely modified by the South Fork Fishing & Hunting Club. Changes made by the Club, especially lowering of the embankment crest, were fatal. They cut the safe discharge capacity in half and doomed the dam and the towns below it to inevitable destruction.

“I shall try to correct errors when shown to be errors, and I shall adopt new views so fast as they shall appear to be true views.”

—Abraham Lincoln, in Letter to Horace Greeley, Aug. 22, 1862

Keywords

Johnstown flood 1889 Pipe flow Spillway Rating curve Auxiliary Discharge rate James Francis Safe discharge South fork Dam Neil Coleman Heliyon 

References

  1. Brua SA (1978) Floods of July 19–20, 1977 in the Johnstown area, Western Pennsylvania. U.S. geological survey open file report 78–963, 62 pGoogle Scholar
  2. Chow VT (ed) (1964) Handbook of applied hydrology. McGraw-Hill Book Co., New York, p 1418Google Scholar
  3. Coleman NM, Kaktins U, Wojno S (2016) Dam-breach hydrology of the Johnstown flood of 1889 – challenging the findings of the 1891 investigation report. Heliyon 2, 54 p,  https://doi.org/10.1016/j.heliyon.2016.e00120 CrossRefGoogle Scholar
  4. Davis C (1889) The South fork dam, proceedings of engineers’ Society of Western Pennsylvania, pp 89–99Google Scholar
  5. Dingman SL (1984) Fluvial hydrology, W. H. Freeman & Co., NY, 383Google Scholar
  6. Eng. News (1889) Engineering News, June 15 1889 p 541Google Scholar
  7. Francis JB, Worthen WE, Becker MJ, Fteley A (1891) Report of the Committee on the cause of the failure of the South Fork dam. ASCE Trans. vol XXIV, pp 431–469Google Scholar
  8. Frank WS (1988) The cause of the Johnstown flood: A new look at the historic Johnstown flood of 1889. Civil Engineering—ASCE, vol 58, no. 5, May 1988, pp 63–66. Also see: http://www.smoter.com/flooddam/johnstow.htm. [Accessed 2 Apr 2018]
  9. Froehlich DC (1995) Peak outflow from breached embankment dam. J Water Resour Plan Manag 121(1):90–97CrossRefGoogle Scholar
  10. Froehlich DC (2008) Embankment dam breach parameters and their uncertainties,J Hydraul Eng, vol 134, no. 12, Dec 1, 1708–1721CrossRefGoogle Scholar
  11. Kaktins U, Davis Todd C, Wojno S, Coleman NM (2013) Revisiting the timing and events leading to and causing the Johnstown flood of 1889. PA Hist: J Mid-Atlantic Stud, vol 80, no. 3, 335–363Google Scholar
  12. MacDonald TC, Langridge-Monopolis J (1984) Breaching characteristics of dam failures. J Hydraul Eng 110:567–586CrossRefGoogle Scholar
  13. McCullough D (1968) The Johnstown flood. Simon and Schuster, New York, 302 pGoogle Scholar
  14. NOAA (2012) The enhanced Fujita scale, NOAA’s Storm Prediction Center, Available at: http://www.spc.noaa.gov/efscale/. [Accessed 2 Apr 2018]
  15. Pagan AF (1974) The Johnstown flood revisited. Civil Eng.—ASCE, Vol 44, No. 8, Aug 1974, pp 60–62Google Scholar
  16. Pierce MW, Thornton CI, Abt SR (2010) Predicting peak outflow from breach embankment dams, prepared for National dam Safety Review Board Steering Committee on dam breach equations, Colorado state U, Ft. Collins, p 45Google Scholar
  17. Pittsburgh Commercial Gazette (1889) Resident engineer Parke’s story, Tuesday Jun 4th, p 1Google Scholar
  18. PRR (Pennsylvania Railroad) (1889) Testimony Taken by the PRR Following the Johnstown Flood of 1889. [Statements of PRR employees and others in reference to the disaster to the passenger trains at Johnstown, taken by John H. Hampton, at his office in Pittsburgh, by request of Superintendent Robert Pitcairn; beginning July 15th, 1889.] Copy in archive of Johnstown Area Heritage Association. Many stories available online at: https://www.nps.gov/jofl/learn/historyculture/stories.htm [Accessed 1 Apr 2018]
  19. Russell TH (1964) All at once the dam was gone, Johnstown Tribune-Democrat, May 29Google Scholar
  20. Singh VP (1996) Dam breach modeling technology. Kluwer Academic Publishers, Boston, p 260CrossRefGoogle Scholar
  21. Tracy HJ (1957) Discharge characteristics of broad-crested weirs USGS Circular 397, p 15Google Scholar
  22. Unrau HD (1980) Historic structure report: the south fork dam historical data, Johnstown flood National Memorial, Pennsylvania. Package no. 124, US Dept of the interior, NPS (1980): 242Google Scholar
  23. Wahl TL (1998) Prediction of embankment dam breach parameters - a literature review and needs assessment. DSO-98-004, dam safety research report. Dam safety office, water resources res. Lab., p 59Google Scholar
  24. Walder JS, O’Connor JE (1997) Methods for predicting peak discharge of floods caused by failure of natural and constructed earthen dams. Water Res Research 33(10):2337–2348CrossRefGoogle Scholar
  25. Wellington AM, Burt FB (1889) “The south fork dam and Johnstown disaster,” Eng. News and Railway Journal 21:540–544Google Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Neil M. Coleman
    • 1
  1. 1.Department of Energy and Earth ResourcesUniversity of Pittsburgh at JohnstownJohnstownUSA

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