|Fig. 1. UPRR right-of-way, with poleline at left. |
Fig. 2. Poleline.
Fig. 3. Typical poles.
Fig. 4. Allocation of facilities on poleline.
Fig. 5. Primary power crossarm.
Fig. 6. Pole at grade-crossing shelter.|
Note the stepdown transformer on the top crossarm
and the aerial drop at the lower left.
Fig. 7. Stepdown transformer on pole at grade-crossing shelter.|
Note the two primary disconnect switches on the same crossarm.
Fig. 8. Aerial drop to grade-crossing equipment shelter.|
The drop contains secondary electric power, signalling, and
communications circuits secured to a steel supporting cable.
Fig. 9. Grade-crossing shelter.|
This shelter contains equipment to control signal
lights, bells, and gates at a grade crossing.
Fig. 10 Primary power feed point. |
These poles support the primary power connection between
the UPRR pole line (left) and utility-company power pole (right).
Fig. 11. Primary power feed point. |
1. Power company sub-transmission crossarm.
2. Power company primary crossarm.
3. Stepdown transformer (provides 115/230-volt
secondary service to nearby buildings).
4. Secondary service drops to nearby buildings.
5. Primary conductors to UPRR pole at left.
6. Neutral conductor to UPRR pole.
7. Transformers (or circuit breakers?) to interface
power company primary with UPRR primary.
8. UPRR 2400-volt primary conductors.
Fig. 12. Communications crossarm.
Fig. 13. Typical transposition insulators.
Fig. 14. Transposition insulators for two conductor-pairs.|
The conductor-pair on the left has been removed, although
bits and pieces of it still exist at various places along the line.
Fig. 15. Description of conductor transposition.|
Kempster B. Miller. American Telephone Practice, Fourth Edition.
New York: McGraw Publishing Company, 1905, p. 166.
Fig. 16. Signaling crossarms.
Fig. 17. Gate, with lights and bell, at grade crossing.
Fig. 18. Rail traffic signals.
Fig. 19. Shelter at grade crossing.|
The aerial drop from the pole to the shelter carries, among
other things, three conductors indicating the presence of a train
at a train-position sensor shelter several hundred feet north.
Fig. 20. Shelter at grade crossing.|
The light on the right side of the shelter burns continuously,
indicating that electric power is normal at the shelter.
Fig. 21. Shelter near train-sensor.|
The aerial drop provides electric power to the shelter, and contains
three conductors that indicate the presence of a train on one of the tracks.
Fig. 22. Shelter near train-sensor.|
The aerial drop to the pole is visible at the left;
its shadow is visible on the ground.
Fig. 23. Train-sensing connection.|
Similar connections are made to both rails, probably indicating that
the presence of a train is indicated by a short-circuit between the rails.
Fig. 24. Secondary power service to signal shelter.|
This shelter controls rail traffic signals (visible at right).
Secondary power is provided by the triplex drop and the electric
meter on the pole in the foreground.
Fig. 25. Secondary power service to grade-crossing shelter.|
This shelter controls a grade crossing (visible at right). The abandoned
UPRR poleline (6) is no longer in operation; it will be removed in the future.
1. Utility company power pole.
2. Utility company primary circuit (3-phase wye).
3. Utility company secondary circuit (1-phase 115/230 volt triplex).
4. Cable TV fiber (goes underground to other side of tracks).
5. UPRR open wire power/communications/control wiring (abandoned).
6. UPRR pole (abandoned).
7. Utility company meter pole.
8. Meter enclosure.
9. UPRR Equipment enclosure.
10. Gate (raised).
11. Utility company lift pole.
Fig. 26. Tally lights on crossing shelter.|
The illuminated light on the right burns continuously,
signifying that power is available in the shelter.
The strobe on the left flashes in the event of a power failure.
Fig. 27. Carrier-system connections to rails.|
Fig. 28. UPRR microwave tower, Millard County, Utah.
Fig. 29. Fallen wires.
Fig. 30. Abandoned aerial drop.|
Note the cut drop dangling by the pole.
Fig. 31. Missing pole.|
Crossarms float in midair supported by conductors.
Fig. 32. Chopped-off conductors.|
In each of these cases, the conductors were chopped off
at a pole in order to remove a section of the poleline
so that shelters could be converted to utility power.
Fig. 33. Road construction.|
The conductors were simply cut loose and left dangling.