ColoradoRailfan.com Contemporary Railfanning in Colorado
Railroad photograph
Photo by: Kevin Morgan
There are not that many Tier-4 units in the United States. Even less common (in Colorado) are Norfolk Southern ET44ACs. However, there just happened to be one leading an eastbound BNSF oil train on the Moffat this afternoon. The train is coming through the shortest tunnel in the Tunnel District, Tunnel 29.
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Monday, August 11, 2025 at 16:15:56
image date


Location Information

City or County and State
Boulder County, CO

Subdivision
Moffat Tunnel (UP)

Milepost or Control Point
Tunnel 29 (MP 36.4, 75 ft)



Train Information
Railroad
NS, BNSF 		Model
ET44AC 		Primary Unit Number
NS 3641

Paint Scheme
NS Standard 		Symbol
Train Type
Unit Oil


Photo Information
Camera Make/Model
Hasselblad / Mavic 3 / Mavic 3 Pro [L2D-20c] 		ISO
120
Flash
Did Not Fire

Focal Length
24 mm 		Shutter
1/1000 seconds 		Aperture
f/2.8