Two Well/Water structures North West of Jockey Club Mt. Davis Youth Hostel

We discovered a Ribbon Trail leading from Victoria Road at the end of Kennedy Town through the Kung Man Village Resettlement Village

all the way on a ridge to the Jockey Club Mr. Davis Youth Hostel. The recent Typhoon turned it into a machete wielding exercise but the path 

is pretty clear now to use. Approaching the Hostel we came across 2 dilapidated structures in the jungle. They appear to be some kind of water

installation with their well like appearance. 

Does anyone know what they were or when they were built/used?