Folk Songs About Rivers

[Rivers in General]
John Hartford / Watching the River Go By / Tribute to John Hartford
Dave Carter with Tracy Grammer\ The River, Where She Sleeps\ When I Go\ self
Bill Staines / The Whistle of the Jay / River /
Betty Elders / Crayons / Roll On New River / Contemporary Folk / 
Doc Watson / Legacy / Deep River Blues
Yes Yes Boys / Why Say No? / Ready for the River

[Columbia River]
Woody Guthrie / Roll On, Columbia

[Rio Grande]
Pete Seeger / Waist Deep in the Big MuddyTom Russell / Borderland / Down the Rio Grande

[Mississippi River]
Jimmie Rodgers / Miss the Mississippi And You
(covered by many: Emmylou Harris, Merle Haggard, Eric Schoenberg, Harvey Reid, etc.)

[Missouri River]
James Keelaghan / Cold Missouri Waters / A Recent Future
(also done by Cry Cry Cry)
Shenandoah (done by many: Laura Love, Bob Dylan, etc.)

[Monongahela River]
Peter Lang\ Flames Along the Monongahela\ Lycurgus\ Horus

[Willamette River]
Shanghaied on the Willamette (group)