be slid forward for maintenance, reduc- ing the necessary vertical clearance and the distance to the deck above. To feed the lower level staging I added two helixes: one at the south end of Castlegar and a second, larger helix at the other end. This larger one connect- ed staging to both Nelson and the mainline on the upper deck. This two- helix arrangement would allow the transfer table to stage all of the east- ern (Nelson Sub), western (Carmi Sub) and southern (Rossland Sub) trains. A convenient continuous-run connection could also be made to the large helix linking the east and west ends of the mainline. I didn’t think deeply enough, however, about the operator experience traversing the helixes to staging and, before construction was complete, this staging approach would be revised. Now, how would the mainline from Castlegar reach the upper deck? The prototype used grades up to 2.2% on both the west and east slopes to reach Farron summit so might a “nolix” (“no helix”) continuous grade provide suffi- cient elevation? Calculations showed the deck to deck clearances from a no- lix would be 6″ to 8″ closer than desir- able, so I compromised by wrapping the mainline two turns around the large helix and planning a single level
To get trains over the steep mountain grades, pusher engines are a must. Extra 4052 East out of Cascade (page 56, top) is seen getting a push up the 25 mile grade to Farron. Push- ers can also be seen (above) assisting the Ore Extra upgrade on the nominal 2.2% grade at Snowslide Bridge at mile 69.3. This bridge crosses a very active slide path, one of sev- eral on this side of Farron Hill. Railroading on the Boundary Sub was both dangerous and expensive! An eastbound wayfreight is pictured (below) at Shields (M39.1) with chips for the Kraft mill at Castlegar and lumber for eastern Canadian and U.S. markets. Massive re- taining walls, deep cuts and soaring bridges and fills were hallmarks of the Boundary Subdivision and remain visual testaments to the engineering vision that created it.
RAILROAD MODEL CRAFTSMAN
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