Lost Camelback at Manly Dam 2nd Jan

Hey guys and gals.
I left my camelback on one of the timber beams outside the Manly water plant on King St (Manly Dam) last Friday night 2nd Jan after a ride at approx. 6.45pm. It's dark blue and had some tools, pump and a personal item of sentimental value. I am happy to pay a reward for it's return.
Thanks.