Editing Mio, Michigan (section)

===Historical markers===
There are two historical markers in Mio.
* Mio Hydroelectric Plant was built in 1916 on the lower Au Sable River. William W. Tefft, a [[Consumers Energy|Consumers Power]] civil and hydraulic engineer, invented and patented the so-called "conduit spillway", which channels excessive flow through channels built into the plant. This was the first plant to use it, and it is cheaper than other forms of spillways.<ref>{{Cite web |url=http://www.michmarkers.com/Frameset.htm |title=Mio electric Plant historical marker |access-date=February 1, 2010 |archive-url=https://web.archive.org/web/20100315141338/http://www.michmarkers.com/Frameset.htm |archive-date=March 15, 2010 |url-status=usurped |df=mdy-all }}</ref>
* [[Oscoda County Courthouse]] was built in 1888.<ref>{{cite web|url=http://webarchives.cdlib.org/sw1hm53n4b/http://www.ers.usda.gov/Briefing/Population/Photos/ShowCH.asp?FIPS=26135|title=Web Archives: View Archived Page|work=cdlib.org|access-date=December 12, 2014}}</ref><ref>{{Cite web |url=http://www.michmarkers.com/Frameset.htm |title=Mio historical markers |access-date=February 1, 2010 |archive-url=https://web.archive.org/web/20100315141338/http://www.michmarkers.com/Frameset.htm |archive-date=March 15, 2010 |url-status=usurped |df=mdy-all }}</ref> It was destroyed by a fire on May 5, 2016. Construction of a new building officially began on May 20, 2019, and was completed in February 2020.<ref>{{cite web |title=A Brief History of Oscoda County |url=https://www.oscodacountymi.com/county-history/ |website=County History |publisher=Oscoda County |access-date=30 July 2021 |ref=countyhistory}}</ref>