Healing River's a great song I haven't seen mentioned. My notes say it was written by Fred Hellerman and Fran Minkoff, and Pete Seeger and recorded it on 1964's I Can See a New Day.

The lyrics:

O healing river, send down your waters
Send down your waters upon this land
O healing river, send down your waters
To wash the blood from off the sand

This land is thirsting, this land is parching
No seed is growing in the barren ground
This land is thirsting, this land is parching
O healing river, send your water down

        Let the seed of freedom, awake and flourish
        Let the deep roots nourish, let the tall stalk rise
        Oh seed of freedom, awake and flourish
        Proud leaves uncurling, into the skies

For what it's worth, my simplification of the chords Pete plays go like this, transcribed Rise Up Singing style:

1st verse
G D G C / G A DA D / G B7 Em A / G AmD GC G [1st v.]

2nd verse: same as first, but end of B7 instead of G               

3rd verse:
Em — B7 — / Em A DA D / G B7 Em A / G AmD GC G