Burlington Northern Santa Fe Railway
Southwest Division  
Seligman Subdivision  
near Topock , Arizona
Last Observation Date
Lat 34° 44' 25" N
24-25 Nov 2002
Lon 114° 25' 02" W
Radio Frequencies
Road
160.650 MHz
ATCS
897.8875 MHz (MCP)
 
936.8875 MHz (BCP)
 
Naming convention according to author's rules and logic. Your rules might be different. Vive la difference!
DIRECTIONS

Get off I40 at exit 1 and head north to the railroad overpass. The dirt road along the south of the tracks provides access to Topock control point, about 1 mile east. The road is very dusty but should be passable by low-clearance, 2WD vehicles. Proceed at your own risk.
COMMENTS

While not too far from some form of civilization, you are far enough that depending on the weather and your state of preparedness it can be lethal. Come prepared with tools, water, spare tires, big hat, etc. Topock CP is along the edge of the mighty Sacramento Wash, which rivals the Hassayampa River (in central Arizona) for the title of the world's driest river. If it rains hard, it can flood big.
INDICATIONS
CP Object
Index
Definition
ATCS Mnemonic
Bit Location
         
Switches 1 Normal 1NW K11
    Reverse 1RW K12
  2 Normal 2NW K13
    Reverse 2RW K14
         
Tracks 1 W Approach 1WA K33
    E Approach 1EA K34
    In Plant 1T K31
  2 W Approach 2WA K35
    E Approach 2EA K36
    In Plant 2T K32
         
Signals Track 1 W Approach 1WG K21
    E Approach 1EG K22
  Track 2 W Approach 2WG K23
    E Approach 2EG K24
         
Other   Track 1 Plant Lock   K25
    Track 2 Plant Lock   K26

Indication Bits currently unknown or unused: K17, K18, K28, K31, K33, K38

CONTROLS
CP Object
Index
Definition
ATCS Mnemonic
Bit Location
         
Switches 1 Normal 1NW C11
    Reverse 1RW C12
  2 Normal 2NW C13
    Reverse 2RW C14
         
Signals Track 1 W Approach 1WG C21
    E Approach 1EG C22
  Track 2 W Approach 2WG C23
    E Approach 2EG C24
         
Other   Track 1 Plant Lock $1PL

unk
    Track 2 Plant Lock $2PL unk

Control Bits currently unknown or unused: C15, C16, C17, C18, C25, C26, C27, C28, C31, C32, C33, C34, C35, C36, C37, C38

 
The information contained here is based completely upon the author's personal observations or information gathered from sources of unknown reliability. Do not rely upon this information for any purpose. The author disclaims responsibility for any actions taken based upon any information contained herein. Do not trespass nor encourage others to do so. Read the signs and behave accordingly. Pick up others' trash and leave none of your own. Take only pictures and leave only foot (and tire) prints.