Ann, perhaps, some of this listed below can help, and others can add to it..
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Soldiers' Records: War of 1812 - World War I--You can view military cards online
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Name: POWERS, PINCKNEY L. Rank: Captain Conflict: Civil War Side: Union Type of Unit: Organization: Enrolled Missouri Militia Name of Unit: 68th Regiment E.M.M. Alternate Unit Name: Company: K
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http://www.sos.mo.gov/TIF2PDFConsumer/DispPDF.aspx?fTiff=/archives/AdjutantGeneral/Civil_War/ServiceCards/s867/0585.tif&Fln=S251662.pdf
POWERS, PINCKNEY L. Rank: Captain Conflict: Civil War Side: Union Type of Unit: Infantry Organization: Missouri Volunteers Name of Unit: 47th Regiment Infantry Volunteers Alternate Unit Name: Company: H
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Name: POWERS, PINKNEY L. Rank: Captain Conflict: Civil War Side: Union Type of Unit: Organization: Provisional Enrolled Missouri Militia Name of Unit: 8th Regiment Provisional E.M.M. Alternate Unit Name: Company: M
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http://www.sos.mo.gov/TIF2PDFConsumer/DispPDF.aspx?fTiff=/archives/AdjutantGeneral/Civil_War/ServiceCards/s898/1315.tif&Fln=S251659.pdf
Name: POWERS, PINKNEY L. Rank: Captain Conflict: Civil War Side: Union Type of Unit: Organization: Six Months Militia Name of Unit: Wayne County Independent Company Six Months Militia Alternate Unit Name: Power's Regiment Company: A Period of Service: 6 Months
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American Civil War Regiments --Ancestry. Com
Name: Pinkney Powers Side Served: Union State Served: Missouri Service Record: Enlisted as a Captain.Commission in Company H, 47th Infantry Regiment Missouri.
REGIMENT: 47th Infantry Regiment Missouri Date of Organization: 1 Sep 1864 Muster Date: 30 Mar 1865 Regiment State: Missouri Regiment Type: Infantry Regiment Number: 47th Enlisted Died of Disease or Accident: 0 Officers Died of Disease or Accident: 1 Enlisted Killed or Mortally Wounded: 10 Enlisted Died of Disease or Accident: 82 Regimental Soldiers and History: List of Soldiers
Regimental History
Forty-seventh Infantry
MISSOURI
(6 MONTHS)
Forty-seventh Infantry. -- Cols., Thomas C. Fletcher, Amos W. Maupin, Lieut.- Cols., Amos W. Maupin, John W. Fletcher, Maj., John W. Emerson.
In Aug., 1864, Gen. Rosecrans authorized Col. Fletcher to organize a regiment in southeast Missouri, for service in that part of the state. Through the efforts of Fletcher and his assistants more men were recruited than was necessary for the completion of the 47th, and the surplus was turned over to the 50th Mo. infantry. The regiment was mustered in for six months, and until Dec. 12 was on duty in the state.
It was then ordered to Nashville, Tenn., where it arrived three days after the Confederates under Gen. Hood had been so ingloriously defeated. It remained on duty at Columbia, Spring Hill and Pulaski, Tenn., until the latter part of March, 1865, when it was ordered to St. Louis, where it was mustered out on the 29th and 30th of that month.
During its service in Tennessee it was under command of Col. Maupin, Fletcher having been elected governor of the state in the fall of 1864.
Source: The Union Army, vol. 4, p. 271
Battles Fought
Fought on 27 Sep 1864.
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Pilot Knob, the Thermopylae of the West-By Cyrus Asbury --Google (Book Search)--Mentions Captain Powers--You can do a search on this book title..Search index and read some about it.
http://books.google.com/
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JEFFERSON COUNTY -portion of GOODSPEED's HISTORY OF Franklin, Jefferson, Washington, Crawford, & Gasconade Counties, Missouri -Chicago: The Goodspeed Publishing Co., 1888
http://www.rootsweb.com/~nebuffal/jeffcomo/military.htm
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Excerpt:
As soon as the Forty-seventh Regiment was organized (early in September) the companies were sent to their respective counties, as follows: Capt. Weber to Perry County, Capt. St. Gem to Ste. Genevieve, Capts. Mace, McMurtry and Powers to Wayne County, Capt. Adair to St. Francois, Capt. Buxton to Jefferson, Capt. Dinger to Ironton, Capt. Bradley to Fredericktown and Capt. Maupin to the Iron Mountain Railroad to guard bridges. On the approach of Price on his raid into Missouri, in September, 1864, Capt. Weber's company marched to strengthen the garrison at Cape Girardeau. Capts. McMurtry, Mace and Powers bravely fought the enemy at Patterson, and fell back on Pilot Knob. Capt. Bradley also fell back to that place
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Fort Davidson State Historic Site
http://www.mostateparks.com/ftdavidson/interp.htm
Museum Artifact Samples--Captain Pickney Powers
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http://www.civilwarhome.com/Ewing.htm
Report of Brig. Gen. Thomas Ewing, jr., U. S. Army,
Commanding District of Saint Louis.
AUGUST 29-DECEMBER 2, 1864
Price's Missouri Expedition.
HEADQUARTERS SAINT LOUIS DISTRICT,
Saint Louis, October 20, 1864.
Col. J. V. DU BOIS,
Chief of Staff, Headquarters Dept. of the Missouri
Excerpt:
Fort Davidson is a hexagonal work, mounting four 32-pounder siege guns and three 24-pounder howitzers en barbette. It lies about 300 yards from the base of the knob and 1,000 from the gap. From the fort to the remotest summit of these hills visible from it is not over 1,200 yards, while all parts of the hill-sides toward the fort, except the west end of Shepherd's Mountain, are in musket-range. The fort was always conceded to be indefensible against any large army having serviceable artillery. Early last summer I sent competent engineers to select another site, but such are the difficulties of the position no practicable place could be found any more defensible. I therefore had the roads leading up the hills obstructed, cleared the nearest hill-sides of timber, and put the fort in a thorough state of defense by deepening the ditches, strengthening the parapet, and adding two rifle-pits leading north and south, commanding the best approaches. On reaching Pilot Knob at noon of Monday, September 26, I found scouting parties had been sent the night before on all the main roads, but that the party sent toward Fredericktown had returned after going but six or eight miles. I forthwith sent two companies to make a thorough reconnaissance toward Fredericktown, and a small scouting party under Captain Powers to cross the roads leading from the south to that place, and learn of the loyal people on them as much as possible as to the force of the enemy.
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47TH MISSOURI INFANTRY REGIMENT
PHOTOGRAPHS OF MEN OF THE 47TH MISSOURI INFANTRY (Most of these photo's are courtesy of Fort Davidson Historical Site)
http://47thmissouriinfantry.com/Photos.htm
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Gay