I actually created a thread about this a few years ago (linked at the bottom) in which I referred to a very revealing Twitter thread on the topic. You could read the thread in its entirety back then, but now (at least on my phone), you need an X account to read beyond the first post, and I don’t have one. In any case, the thread is helpfully paraphrased here:
Did Disney World mean to depict colonial sewage?
www.disneydining.com
In short, the original pavement had a strip of cobblestone running down it where the “poop river” now is. Beginning in the ’90s, these cobblestones were replaced, first by red brick and then by the current brown path. The latter apparently
was discussed as a representation of faeces among the Imagineers as a sort of inside joke. However, this notion had nothing to do with the land’s original conception, was not meant to be made public, and is not historically accurate anyway (yes, old streets had waste matter along their gutters, but not great streams of the stuff flowing down their centres!).
Another bit of Liberty Square apocrypha: the claim that the window shutters sag as a nod to the practice of using leather hinges when iron was needed for war. This despite the fact that the hinges are all visibly metal and photos from the ’70s show that the shutters originally hung straight!
[ETA: I found the answers to my questions in the Twitter thread I share below, so take a look at my subsequent posts before replying to this one!]
It came up yesterday in a thread about Splash Mountain that the brown pavement running through Liberty Square is a reference to the sewage that would have filled the streets back in colonial times. The claim that this feature is a “river of poop” is repeated again and again online and can be found also in some more recent (unofficial) publications about Walt Disney World. In my quest to find an older and/or more authoritative source...