I asked the Bureau of Environmental Services wif they knew what was going on, and here's the response from their public info person:
Thanks for your inquiry. I contacted staff at the Columbia Blvd Treatment Plant and learned that Union Pacific RR is involved in a rail upgrade project that has impacted both the pedestrian crossing and the main plant entrance road. According to our staff, construction has been occurring for over 6 months; however, our staff do not have further information about the project's schedule.
I hope this is helpful. Let me know if you have any additional questions.
so it's a question for Union Pacific, assuming you can find someone to ask, let alone respond.