Is Anyone Up for a Bit of Name That Tune

My mother and I were just reminiscing about songs she used to sing when we were young. She plays the piano now, but used to play the guitar and banjo, too, way back when. She and some of her friends used to get together and sing. She had fun. We all had fun. Singing in the car was one of my favorite things. Anyway, I decided to put together a "play list" for a present for my mother. I have one problem. I don't know the name of one of the songs nor the name of the original artist. I do remember most of the words, even though I haven't heard the song in at least 25 years

Can you name this Song or the original artist??

Had a rusty railroad shack by the river shore
Where the Mississippi River ran by the door

Nothing seemed to work out everything went wrong
So I moved across the river just so I could be alone

Its rained for six whole days and nights, I need you more and more
but the Mississippi River just keeps rising on the shore

That old Mississippi River just gets wider everyday
Its Keeping us apart and keeping you away.
The Lord knows how I hoped and the Lord knows how I prayed
but the Mississippi River just keeps rising every day. Rising.

I realize this isn't top forty, but can anyone help??