Boat Name	Year Built		Where Built	Date Lost	Source
U. S. Mail	1852		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 110
Uchee	1860		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 113
Umpire	1847		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 109
Umpire No. 2	1850		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 110
Uncas	1829		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 107
Uncle	1844		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 109
Uncle Ben	1845		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 109
Uncle Ben	1853			1867	COTTON CLAD GUNBOAT "UNCLE BEN"
Uncle Ike	1859		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 112
Uncle Sam	1829		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 107
Uncle Sam	1845		Louisville Ky.	1850	Way's Packet Directory
Uncle Sam	1848		Louisville Ky.	1859	Way's Packet Directory
Uncle Sam	1862		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 114
Uncle Sam (Ferry boat)	1878		Valley Creek, Iowa		Way's Packet Directory
Uncle Sam	1898		Sterling Island, Ill.	1910	Way's Packet Directory
Uncle Toby	1844		Pittsburgh, Pa.	1853	EARLY STEAMBOAT NAVIGATION
Undine	1859		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 112
Undine	1868		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 115
Unicorn	1853		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 111
Union	1845		Wellsville, Oh.	1850	Way's Packet Directory
Union	1845		Marion, Ala.	1855	Way's Packet Directory
Union	1847	or 46	Wellsville, Oh	1855	Way's Packet Directory
Union	1850		Elizabeth, Pa.	1852	Riverboat Building In Pittsburgh, Pa. - Pg. 110
United States	1836		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 108
Urilda	1843		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 109
Urilda	1863		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 114
Utah	1857		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 112
Utica	1841		Pittsburgh Area		Riverboat Building In Pittsburgh, Pa. - Pg. 108
Total # of U's - 27