However, no record can be found of the extent or exact nature of the damage. The shops and a number of cars were burned so it is reasonable to assume that the cab and other wooden parts of the locomotive were damaged. One unverified report in the files of the Pennsylvania Railroad states that part of the roof and brick wall fell on the Pioneer during the fire causing considerable damage. In June 1864 the Chambersburg shops were again burned by the Confederates, but on this occasion the railroad managed to remove all its locomotives before the raid. During the Civil War, the Cumberland Valley Railroad was obliged to operate longer passenger trains to satisfy the enlarged traffic. The Pioneer and its sister single-axle engines were found too light for these trains and were used only on work and special trains. Reference to table 1 will show that the mileage of the Pioneer fell off sharply for the years 1860-1865.
Table 1.—Yearly Mileage of the Pioneer
(From Annual Reports of the Cumberland Valley Railroad)
| Year: | Miles |
| 1852 | [a] 3,182 |
| 1853 | [] 20,722 |
| 1854 | 18,087 |
| 1855 | 14,151 |
| 1856 | 20,998 |
| 1857 | 22,779 |
| 1858 | 29,094 |
| 1859 | 29,571 |
| 1860 | 4,824 |
| 1861 | 4,346 |
| 1862 | ( [c] ) |
| 1863 | 5,339 |
| 1864 | 224 |
| 1865 | 2,215 |
| 1866 | 20,546 |
| 1867 | 5,709 |
| 1868 | 13,626 |
| 1869 | 1,372 |
| 1870 | … |
| 1871 | 2,102 |
| 1872 | 4,002 |
| 1873 | 3,721 |
| 1874 | 3,466 |
| 1875 | 636 |
| 1876 | 870 |
| 1877 | 406 |
| 1878 | 4,433 |
| 1879 | … |
| 1880 | 8,306 |
| 1881 | ( [d] ) |
| Total | [e] 244,727 |
[a] Mileage 1852 for January to September (no record of mileage recorded in Annual Reports previous to 1852).
[] 15,000 to 20,000 miles per year was considered very high mileage for a locomotive of the 1850’s.
[c] No mileage reported for any engines due to fire.
[d] Not listed on roster.
[e] The Pennsylvania Railroad claims a total mileage of 255,675. This may be accounted for by records of mileages for 1862, 1870, and 1879.
In 1871 the Pioneer was remodeled by A. S. Hull, master mechanic of the railroad. The exact nature of the alterations cannot be determined, as no drawings or photographs of the engine previous to this time are known to exist. In fact, the drawing ([fig. 8]) prepared by Hull in 1876 to show the engine as remodeled in 1871 is the oldest known illustration of the Pioneer. Paul Westhaeffer, a lifelong student of Cumberland Valley R. R. history, states that according to an interview with one of Hull’s descendants the only alteration made to the Pioneer during the 1871 “remodeling” was the addition of a handbrake. The road’s annual report of 1853 describes the Pioneer as a six-wheel tank engine. The report of 1854 mentions that the Pioneer used link motion. These statements are enough to give substance to the idea that the basic arrangement has survived unaltered and that it has not been extensively rebuilt, as was the Jenny Lind in 1878.
By the 1870’s, the Pioneer was too light for the heavier cars then in use and by 1880 it had reached the end of its usefulness for regular service. After nearly thirty years on the road it had run 255,675 miles. Two new passenger locomotives were purchased in 1880 to handle the heavier trains. In 1881 the Pioneer was dropped from the roster, but was used until about 1890 for work trains. After this time it was stored in a shed at Falling Spring, Pennsylvania, near the Chambersburg yards of the C.V.R.R.