Here's another interesting, related, bit of information from that site;

IrcRam:
l. 152';
b. 34;
dph. 10' 6";
dr. 8';
s. 3 k.;
cpl. 120;
a. 1 6.4" r., 3 32-pdr. [planned];
type Heavy ALBEMARLE

CSS TUSCALOOSA, an ironclad floating battery, was launched at Selma,
Ala., 7 February 1863. She was designed as a ram to mount four guns and
to have the protection of 4-inch iron plating supplied by Schofield &
Markham and Shelby Iron Co.

Engined before launching, TUSCALOOSA proceeded under her own power to
Mobile for completion. Under Commander C. H. McBlair, CSN, she served in
the Mobile area until Mobile's capitulation on 12 April 1865 when the
Confederates sank her in the Spanish River 12 miles north of the city.

There's probably more of interest there, too. That's just all that I had time to look at right now.