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Twin Bore Diameter (PMT VTA(2018) (Emergency walkway (Cross passages…
Twin Bore Diameter
PMT VTA(2018)
Silver Creek Fault
BFS Trackway Clearance Criteria 3.1.2
additional 1' clearance - 100' either side fault zone
5'' construction tolerance
2'' construction
3'' mining
Emergency walkway
2007 RFV 0030
46''
BFS 3.1.2
Min 30''
Cross passages
BFS 300' max spacing
630' max. requested
Cost reduction
Typical sections
Tangent Track
Fault crossing
Steel grate walkway
Requires localized encroachment into 46'' walkway for panel boxes
RFV 011 Approved 2004
Allows for localized encroachment into 30'' walkway for fire hoses
300'
19'10'' I.D.
5'' construction tolerance
Seismic fault zone clearance envelope (BFS 3.1.1. trackway clearances fig. 27)
Outside fault crossing
Curve Track?