I believe they were in the Deep Bottom, Burton’s Farm, Chaffin’s Bluff, Drewry’s Bluff area until they were ordered to Charleston September 14, 1863. [Wiatt, p. 13]
………..

A Regimental Casualty Analysis of some 163 engagements is presented by the American Civil War Research Database at:

http://www.civilwardata.com/active/hdsquery.dll?RegimentCasualty?780&C

This is a subscription service, however, a trial period is provided, see:

http://www.civilwardata.com/demo1.html

As an example, the regiments greatest losses occurred on June 15, 1864 at Petersburg, losing 2 killed, 22 wounded 108 captured and 2 missing. The individuals involved are identified, for instance:

John A. Eubank

Enlisted on 5/7/1861 at New Prospect, VA as a Corporal.
On 5/7/1861 he mustered into "C" Co. VA 26th Infantry
He was Killed on 6/15/1864 at Petersburg, VA
(Enlisted as 1st Corpl)

Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series