| The PARSONS VALE Line |
The Class B locomotive is the mainstay of PV&T freight operations. The 89 class B engines in operation handle most of the PV&T's road, switching, and transfer operations. From the delivery of the first class B1 in 1920, the PV&T, ALCO, and GE have been refining the model for better and higher performance.
| 1920 | Delivery of class B's 213-241. |
| 1931 | Delivery of class B2's 243-276. Class B
reclassified to class B1. |
| 1940 | Rebuilding class B1 to 3600hp. |
| 1944 | Class B1's 221,224,239 wrecked. |
| 1944 | Delivery of class B3's 291-294. |
| 1946 | Construction of class B3's 295-296. |
| 1959 | Leased 291-292 to CMStP&P |
| 1960 | Leased 293-294 to CMStP&P |
| 1961-1964 | Rebuilding all class B's, except 291-306, to 4400hp. |
| 1962 | Leased 295-300 to CMStP&P |
| 1963 | Leased 301-306 to CMStP&P |
| 1966 | class B4's on order. |