From the 1867 U.S. Army Corps of Engineers Map of Richmond, made under the direction of Maj. Nathaniel Micheler and Capt. Peter S. Michie (National Archives, Record Group 77, Map G 204, #55 & 57). Via Civil War Richmond:
This map is scanned from a reprinted map published by the Richmond Civil War Centennial Committee in 1965 (Official Publication #25). The map was completed in 1867, and shows the city of Richmond as it appeared shortly after the Union occupation of Richmond, in April of 1865. It is, in my opinion, the most detailed and accurate map of the city to be found.