here is some brief info re Springfield Landing; taken from the O.R. and David C. Edmonds’ book The Guns of Port Hudson, Volume Two, The Investment, Siege and Reduction (1984), pages 64-376:
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From the O.R., Series I, Volume 26, Part 1, Siege of Port Hudson, La. :

No. 48. -- Reports of Col. John L. Logan, Eleventh Arkansas Infantry, of operations May 21 - July 8.

JACKSON, July 3,
VIA MONTGOMERY, [July] 6, 1863.
(Received at Richmond, July 9.)

Following dispatch just received:

General JOSEPH E. JOHNSTON:

On morning of 2d, at daylight, I surprised and captured Springfield Landing, the enemy’s depot for landing supplies, 7 miles below Port Hudson, 6 miles in their lines. Burned their commissary and quartermaster’s stores, destroyed 100 wagons, killed and wounded 140, captured 55 prisoners, paroling 22 of them. My loss, 4 killed and 10 wounded; and engaged brigade of the enemy, and held him in check until the work was done, and then retired.

JNO. L. LOGAN,
Colonel, Commanding, &c.

T.B. LAMAR, Assistant Adjutant-General.

General S. COOPER.

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HEADQUARTERS NEAR JACKSON, LA.,
July 8, 1863.

COLONEL: Inclosed please find a communication from Brigadier-General Green, commanding cavalry brigade, &c., west of the Mississippi River, which I forward at once for your information. The young man states to me that General Taylor has two brigades of infantry, two of cavalry, and a sufficient amount of artillery, including some 12-pounder Parrotts, and that they were mounting two 24-pounder smooth-bore pieces; that transports could not pass their batteries, but that gun-boats continue to pass by, running near the east shore of the river.

I have answered the communication, and urged General Green to hold his present position and cut off the enemy’s supplies, and at the same time open communication with General Gardner, and provision the garrison at Port Hudson by swimming beeves across the river.

I hope from this statement you will understand the position, &c. Being on the move, I write in great haste.

I am, colonel, very respectfully, your obedient servant,

JNO. L. LOGAN,
Colonel, Commanding Brigade.

Col. B.S. EWELL,
Assistant Adjutant-General

[Inclosure]

HEADQUARTERS FIRST TEXAS CAVALRY BRIGADE,
Assumption Church, on La Fourche, July 5, 1863.

To any Confederate Officer commanding on the east of the Mississippi.

I send my young volunteer aide-de-camp, Leander McAnelly, of the Fifth Texas Cavalry, to communicate with any Confederate force on the east of the Mississippi.

We have a sufficient force on this side, of cavalry, infantry, and artillery, to hold it against any force the Yankees can bring against us. If a force on the east, below Donaldsonville, could hold their own on the river, we can stop the supplies to Banks’ army, and force him to raise the siege of Port Hudson. We will, I am confidant, be able to whip his army in the open field should he move on this side.

McAnelly will give you full details.

THOMAS GREEN,
Brigadier-General, Commanding First Cavalry Brigade

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from: http://www.geocities.com/enlistedman/clinton.html

"At dawn on July 2, Powers and Stockdale once again led a force, this time of about 200 men, against the Federal supply depot at Springfield Landing. Every other man had a bottle of turpentine with him and all had matches. The Yankee pickets of the 162nd NY Infantry were swept up and nothing stood between the Confederate raiders and their target, a hundred acres of supplies, wagons, animals, hospital tents, stores, warehouses, and Negro shanties. The rampaging Rebels charged, splitting into 3 separate detachments -- one straight to the landing, one right, one left -- shooting and tossing their flaming turpentine firebombs in all directions. Within minutes, the great mounds of Federal supplies and material were in flames; panicked men dove into the Mississippi or ran towards the Federal ammunition boat U.S.S. Suffolk for safety. Confederate claims were made of the total destruction of the Federal commissary and quartermaster stores, 100 wagons, 140 killed/wounded, and 35 prisoners; this with a Confederate loss of only 4 killed and 10 wounded. Federal accounts accordingly downplay the destruction wrought by Logan’s men this day during their spectacular 2-hour rampage through the Yankee supply depot."

"Despite their best efforts, the outnumbered men within Logan’s Cavalry Brigade and Colonel John Griffith’s 11th & 17th Arkansas Mounted Infantry could not prevent the inevitable success of Major General Banks’ siege against Port Hudson. On July 9, 1863 CSA Major General Gardner surrendered his garrison; this at a cost of over 5,000 Federal casualties over the entire siege period. The approximately 5,500 Confederates manning Port Hudson’s defenses held out against the Federal army of over 28,000 for a longer period of time than Vicksburg before it fell to U.S. Grant on July 4, 1863. The success of the approximately 1,200 effectives in Colonel John L. Logan’s Cavalry Brigade and his hit-and-run tactics undoubtedly had a lot to do with this fact of history."

hope this helps some,

Kenneth Byrd