ColoradoRailfan.com Contemporary Railfanning in Colorado
Railroad photograph
Photo by: Kevin Morgan
MRL 4306 is the second unit of three on this eastbound oil train, descending down Big Ten Curve and approach an Approach (yellow over red) signal at west end of Rocky.
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Sunday, September 27, 2026 at 17:56:36
image date


Location Information

City or County and State
Arvada, CO

Subdivision
Moffat Tunnel (UP)

Milepost or Control Point
Big Ten Curve (MP 19.5 to MP 20.2)



Train Information
Railroad
BNSF 		Model
ES44AC 		Primary Unit Number
BNSF 6139

Paint Scheme
BNSF New Image 		Symbol
Train Type
Unit Oil

Additional Unit Number(s)
MRL 4306 		   


Photo Information
Camera Make/Model
Hasselblad / Mavic 3 / Mavic 3 Pro [L2D-20c] 		ISO
220
900 		Flash
Did Not Fire

Focal Length
24 mm 		Shutter
1/240 seconds 		Aperture
f/2.8