90 Acre Hill
Ninety Acre Hill was a key surveying location in the early days of settlement in the southern highlands. Satellite and GPS technology have all but eliminated the need for trig stations but the Gibbergunyah Reserve remains a wonderful hiking and bushwalking spot affording spectacular views of Mount Jellore, High Range, and even Joadja and beyond.
To find this cache:
At waypoint 1 (the posted coordinates) you will find the remains of the old 90 Acre Hill trig station. On the trig is a commemorative compass. Calculate the south coordinates as follows:
S 34 27. (Distance to Wombeyan Caves + Distance to Mt Colong - Distance to Wollongong)
At waypoint 2 you will find three plaques celebrating Gibbergunyah Reserve and the Gundungurra people. Using the information on the plaques calculate the east coordinates as follows:
E 150 24.ABC
A = The last digit in the year Arthur Beasley was born
B = The number of digits found on 'the place between the rocks'
C = The sum of the digits of the day this place was unveiled by Val 'ndi' Mulcahy
Checksum S=21, E=19