Hey!
I thought Id just tell some stories of what I gathered from things friends and employees used to say about the reason it closed. I really have no idea how much truth is in this (its probably very little so take it with a grain of salt) and I assume a lot of you are quite a bit more knowledgeable about this than me.
Essentially, in the early to mid 2010s legislation in regards to the operation of water rides and attractions were updated, something to the effect that water rides at parks needed to guarantee a level of quality in the water used. I think it was along the lines of if guests get wet enough the water must be treated for health and safety reasons. For Tidal Wave, not a problem as it already uses treated water in the splashdown but, obviously, with rides that used open-water systems (Rapids, Loggers and the Flume etc) Merlin would need to make some adjustments.
You can see this happen on pretty much all of the flumes in the UK and I guess I dont know enough to outright say if these updates included changes to water treatment but: Pirate Falls became Dynamite Drench, Dragons Falls received a mini-update removing some of the rock work, the Flume closed completely and Loggers.... well
I'm not sure of specific details in regards to the breakoff point to when this supposed restriction may have occurred but Thorpe held onto Loggers for as long as they could before officially going in for the rework in 2015. The plan was to keep it closed for 2016, and start work on it before the 2017 season. Now I dont think there was any planning permission applications and any evidence of this wouldve been dug up quite quickly so that makes me a bit sceptical of the whole thing, but then again if the update was just closing off the water system and slapping 'Re-Drenched' on the sign maybe it wouldnt have been necessary.
Then we all know what happened in 2016...
Supposedly the budget went to the DBGT rework ROTD in 2017 instead and Thorpe, not knowing what to do with it, left Loggers hoping that theyd be able to work on it soon enough. This may explain why for a while afterwards the park were still insisting it would reopen, but as we know that didnt last. The ride began to literally rot and reached a point where they just had to abandon ship.
I think this would explain a lot of the blank spaces left but I dont know. The park definitely knew that Loggers was incredibly important that we know for sure. Its just a shame that it didnt survive longer. Oh and by the way you can identify a lot of the changes made to Congo and Rumba removing a lot of the features and effects that would soak riders in order to avoid having to update those as well: Rumbas waterfall into the tunnel, the sprinklers on the lift and the bucket next to the camera, I believe Congo has also become much more 'tame' in recent times but I'm not sure on specifics.
Anyway, sorry for the long read. I hope it was entertaining and please feel free to debunk it, Id like to know more about Loggers as well.