The 30th Arkansas in 1864 is shown in the Official Records including the following:
OFFICIAL RECORDS: Series 1, vol 41, Part 3 (Price's Missouri Expedition)
HEADQUARTERS CHURCHILL'S DIVISION.
Princeton, September 1, 1864.
Captain BUCK,
Assistant Adjutant-General, District of Arkansas:
CAPTAIN: In compliance with circular letter of instructions, Numbers 686, from district headquarters, date August 31, 1864, I have the honor to report the following as the number of regiments, battalions, batteries and independent companies under my command at this place;
First. Tappan's brigade, Colonel Hardy, Nineteenth Regiment, commanding
- first, Colonel Hardy's regiment, Lieutenant-Colonel Wood commanding;
second, Colonel Thomson's regiment, Colonel Thomson commanding.
Second. Gause's brigade, Colonel Gause commanding-first, Colonel Gause's regiment;
second, Colonel Rogan's regiment (consolidated), Lieutenant-Colonel Hicks commanding;
third, Colonel I. L. Brook's regiment, Lieutenant-Colonel Stanley commanding.
...
J. C. TAPPAN,
Brigadier-General, Commanding.
LtCol Hicks was in the 32nd Ark which indicates a consolidation of the 30th and 32nd Ark
http://ehistory.osu.edu/osu/sources/recordView.cfm?Content=085/0968
Series 1 - Volume 41 (Part III)
Organization of the Army of the Trans-Mississippi Department, General E. Kirby Smith, C. S. Army, commanding, September 30, 1864.*
FIRST (ARKANSAS) DIVISION.
Major General THOMAS J. CHURCHILL.
First (Arkansas) Brigade.
Brigadier General JOHN SELDEN ROANE.
26th Arkansas, Colonel Iverson L. Brooks.
[32nd] Arkansas, Colonel Lucian C. Gause.
[36th] Arkansas, Colonel James M. Davie.
[30th] Arkansas, Colonel James W. Rogan
OFFICIAL RECORDS: Series 1, vol 41, Part 4 (Price's Missouri Expedition)
Organization of the Army of the Trans-Mississippi Department, General E. Kirby Smith, C. S. Army, commanding, December 31, 1864
First Arkansas Infantry Brigade.
Brigadier General JOHN S. ROANE.
26th Arkansas, Colonel Iverson L. Brooks.
Davie's (Arkansas), Colonel James M. Davie.
Gause's (Arkansas), Colonel Lucian C. Gause.
Rogan's (Arkansas), Colonel James W. Rogan.