1772. Ellicott brothers erected largest flour mill in Maryland on Patapsco River.

1781, April 17-19. Marie-Joseph Paul Yves Roch Gilbert du Motier, Marquis de LaFayette's French troops encamped at Elkridge en route to Yorktown.

1791. Benjamin Banneker (1731-1806) published Pennsylvania, Delaware, Maryland, and Virginia Almanack and Ephemeris....

1791-1792. Andrew Ellicott (1754-1820), aided by Benjamin Banneker and Joseph Ellicott, surveyed federal Territory of Columbia.

1822. Savage Mill began operation.

1830-31. Baltimore & Ohio Railroad's Ellicott's Mills Station, the nation's first railroad terminal, constructed.

1835. Baltimore & Ohio Railroad's Thomas Viaduct, first multispan masonry railroad bridge in country, crossed Patapsco River from Elkridge to Relay.

1837. Patapsco Female Institute opened at Ellicott's Mills.

[photo, Howard County Courthouse (from Court Ave.), Ellicott City, Maryland] 1838. Howard District created from Anne Arundel County.

1843. Courthouse constructed at Ellicott's Mills.

1848, May 7. Edwin Warfield (1848-1920), Governor of Maryland, born at "Oakdale," near Elkridge.

1851, June 14. Constitution of 1851 (2nd State constitution) adopted; Howard District recognized as Howard County; named for John Eager Howard (1752-1827).

1854-1858. Thomas Watkins Ligon (1810-1881) of Howard County served as Governor of Maryland.

Howard County Courthouse (from Court Ave.), Ellicott City, Maryland, 1999. Photo by Diane P. Frese.

1861, May 5. Union Maj. Gen. Benjamin F. Butler stationed troops at Camp Essex in Elkridge to guard Thomas Viaduct, only rail link from north to Washington DC.

1861, Sept. 25 Union Patapsco Guards organized at Ellicott's Mills.

1863, June 29. Confederate cavalry under Maj. Gen. James Ewell Brown (J.E.B.) Stuart skirmished with Maryland militia near Cooksville.

1867. Ellicott's Mills renamed Ellicott City.

1868, July 24. Ellicott City flooded by Patapsco River.

[photo, Bollman Iron	Truss Bridge at	Savage Mill, 8600 Foundry St., Savage, Maryland] 1869. Wendel A. Bollman (1814-1884) built iron truss bridge for Baltimore & Ohio Railroad at Savage.

Bollman Iron Truss Bridge (semi-suspension bridge, adjacent to Savage Mill), 1869, built by Baltimore and Ohio Railroad, 8600 Foundry St., Savage, Maryland, January 2005. Photo by Diane F. Evartt.

This bridge is an example of the bridging system invented by Wendel Bollman, Baltimore engineer, in 1850. It spans the Little Patuxent River.

1878. First jail in Howard County opened on Emory Street in Ellicott City.

1879. Maryland House of Correction opened at Jessup.

1885, Sept. 18. Nicholas Snowden lynched in Ellicott City.

1895, May 28. Jacob Henson, Jr. lynched in Ellicott City.

1941. Women's Prison of the State of Maryland (now Maryland Correctional Institution for Women) opened at Jessup.

1946, Aug. 21-22. First Howard County Fair began at Brendel's Manor Park, just west of Ellicott City.

1959. Maximum Security Hospital (now Clifton T. Perkins Hospital Center) established at Jessup.

1963, Oct. James W. Rouse announced plan to build Columbia in Howard County.

1967, June 21. Opening of Columbia, a planned community incorporating one-tenth of Howard County land area.

1967, July 14. Merriweather Post Pavilion opened, Columbia.

1968, Nov. 5. Howard County voters adopted charter form of government with a County Executive and County Council.

1969, Jan. 28. Howard County's first County Executive and County Council sworn in.

1969-1974. Omar J. Jones (Democrat), County Executive.

1970, Oct. Howard Community College opened at Columbia.

1974-1978. Edward L. Cochran (Democrat), County Executive.

1978-1986. J. Hugh Nichols (Democrat), County Executive.

1986-1990. Elizabeth Bobo (Democrat), County Executive.

1990-1998. Charles I. Ecker (Republican), County Executive.

1998-2006. James N. Robey (Democrat), County Executive.

2004, March 2. Electronic voting system used during primary elections at polling places and for absentee ballots in all counties and Baltimore City.

2006, Dec. 4 - 2014, Dec. 1. Kenneth S. Ulman (Democrat), County Executive.

2007, March 19. Maryland House of Correction closed at Jessup.

2014, Dec. 1 - 2018, Dec. 3. Allan H. Kittleman (Republican), County Executive.

2016, July 30. Ellicott City flooded when torrential rains caused Patapsco River and Tiber River to overflow.

2018, May 27. Ellicott City again flooded when torrential rains caused Patapsco River and Tiber River to overflow.

2018, Sept.-Oct. Bloede Dam demolished. Built in 1907 on the Patapsco River between Baltimore and Howard counties, it was the world's first underwater hydroelectric plant.

2018, Dec. 3-. Calvin B. Ball III (Democrat), County Executive.

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