Here's the second version from John A. and Alan Lomax, American Ballads and Folk Songs (1934), pages 467-469 (first version is below). Note the comment on the Lomax version in the entry from the Traditional Ballad Index, above.

Low Bridge, Everybody Down
or Fifteen Years on the Erie Canal
(William S. Allen, Haviland Publishing Co.)

I've got an old mule and her name is Sal,
Fifteen years on the Erie Canal,
She's a good old worker and a good old pal,
Fifteen years on the Erie Canal.
We've hauled some barges in our day,
Filled with lumber, coal and hay—
And every inch of the way I know
From Albany to Buffalo-

Chorus:
Low bridge, everybody down,
Low bridge! We're coming to a town!
You can always tell your neighbor, you can always tell your pal,
If you've ever navigated on the Erie Canal.

We'd better look around for a job, Old Gal,
Fifteen years on the Erie Canal,
You bet your life I wouldn't part with Sal,
Fifteen years on the Erie Canal.
Giddap there, Gal, we've passed that lock,
We'll make Rome 'fore six o'clock—
So one more trip and then we'll go
Right straight back to Buffalo.

Chorus:
Low bridge, everybody down;
Low bridge, I've got the finest mule in town.
Once a man named Mike McGintey tried to put over Sal,
Now he's way down at the bottom of the Erie Canal.

Oh! where would I be if I lost my pal?
Fifteen years on the Erie Canal,
Oh, I'd like to see a mule as good as Sal,
Fifteen years on the Erie Canal.
A friend of mine once got her sore,
Now he's got a broken jaw,
'Cause she let fly with her iron toe
And kicked him in to Buffalo.

Chorus:
Low bridge, everybody down;
Low bridge, I've got the finest mule in town.
If you're looking for trouble, better stay away,
She's the only fighting donkey on the Erie Canal.

I don't have to call when I want my Sal,
Fifteen years on the Erie Canal,
She trots from the stall like a good old gal,
Fifteen years on the Erie Canal.
I eat my meals with Sal each day,
I eat beef and she eats hay,
She ain't so slow if you want to know,
She put the "Buff" in Buffalo.

Chorus:
Low bridge, everybody down,
Low bridge, I've got the finest mule in town.
Eats a bale of hay for dinner, and on top of that my Sal
Tries to drink up all the water in the Erie Canal.

You'll soon hear them sing all about my gal,
Fifteen years on the Erie Canal,
It's a darned fine ditty 'bout my darn fool Sal,
Fifteen years on the Erie Canal.
Oh, any band will play it soon,
Darned fool words and darned fool tune;
You'll hear it sung everywhere you go,
From Mexico to Buffalo.

Chorus:
Low bridge, everybody down,
Low bridge, I've got the finest mule in town.
She's a perfect, perfect lady, and she blushes like a gal
If she hears you sing about her and the Erie Canal.