Splash Mountain is down for refurbishment, again. With a 2017 refurbishment lasting from late August to mid-November, Splash Mountain is again under refurbishment, this time from January 8th to February 1st.
With most of the 2017 refurbishment addressing facade elements, and with no visible scaffolding today, it’s possible that this refurbishment is addressing mechanical work that Disney didn’t get around to last year.