Stephanie,
You can find much information about the topic on the NSPE website. The first PE license started in Wyoming in 1907, they were adopted in other states often as the result of disasters as you mention. The last state Montana in 1947. An article on the topic below.
https://www.nspe.org/sites/default/files/resources/pdfs/pemagazine/june2007_the_professional_engineering.pdfNSPE was founded by D.B Steinman, a famous bridge Engineer and supporter of licensure. I just wrote the below on the topic a few days ago for the MSPE newsletter.
In 1934, a group of professional engineers met in New York City to establish an organization dedicated to the non-technical concerns of licensed professional engineers. From this group, led by D. B. Steinman a noted bridge Engineer, the National Society of Professional Engineers (NSPE) was born. The NSPE stands today as the only national organization committed to addressing the professional concerns of licensed PEs across all disciplines.
Mr. Steinman was one of the first to appreciate the concept that engineering is a profession. The principles of registration of Engineers and the adoption of professional standards and ethics led him to founding NSPE. He worked tirelessly for nearly 30 years to build NSPE to 55,000 members and 53 state societies at the time of his death.
At the 25 year anniversary of NSPE Mr. Steinman spoke, "…Our dream has come true. We have achieved public and legislative recognition that engineering is a profession, that engineering is a learned profession, that engineering is one profession. Moreover we have reminded the world that engineering is founded on great ideals – the ideals of vision, character, integrity and service to humanity."
source:https://www.nspe.org/sites/default/files/resources/pdfs/AboutNSPE/Writings-of-DB-Steinman.pdf
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Michael Buechter P.E., D.WRE, M.ASCE
Program Manager
Metropolitan St. Louis Sewer District
Webster Grvs MO
(314) 968-9723
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