Ah, springtime in the Rockies! Bring your rebar umbrella and your hardhat; it's rocking outside.
Notices of delay like this one is going to be a repeating theme over the next couple of months as crews struggle to clear errant rock slides from the right of way. The melting snows release their water and it flows down between the cracks in the rocks. When the water re-freezes into ice, the odd expansive property of freezing water works to push on both sides of the fracture, sometimes popping off the side of the mountain and falling on whatever (or whoever) is below.
It's the main way that the mountains lose those stubborn winter pounds in time for summer. The rest is just water weight from the snowpack. It's above average this season, which means an opportunity for some good water shots, especially on the western slope--if you can afford a fill-up. Use a telephoto to pull in those rapids next to the rails. Be safe and have fun!