These concrete structures have always just been something I’ve walked by when entering Gas Works Park without giving them much thought. But after doing a little reading about the park, I learned that these were concrete trestles for trains. According to Wikipedia, “They were part of the original 1906 gas plant and ran along the north side of the Office and Laboratories Building. Nothing remains of this building, but the trestles show where the train tracks ended and coal was delivered. Coal cars would ride up the trestles and release coal into hoppers parked under the trestles.”
Take a look at this photo from 1966 showing what the site looked like when it was in a functioning state. Pretty cool!