Allison Mt Colah, New South Wales, Australia
By
Geocaching Australia on 10-Dec-10. Waypoint TP5564
Cache Details
| Difficulty: | |
| Terrain: | |
| Type: | TrigPoint |
| Container: | Other |
| Coordinates: | S33° 40.284' E151° 8.562' (WGS 84) |
| 56H 327813E 6272729N (UTM) | |
| Elevation: | 197 m |
| Local Government Area: | The Hornsby |
/151.1427,-33.6714,14/400x200?access_token=pk.eyJ1IjoiY2F1Z2h0YXR3b3JrIiwiYSI6ImNqa2l4ZzNzMDE5bjgzdm1sZGpuODF1Mm0ifQ.q8YMzVyzDJJlJHHV8EMjwQ)
Description
Allison TS620
Official name of this Trig Station as per NSW Department of Lands is: Allison.
Serial number is: TS620.
Last Inspected on: August 28, 1972.
Elevation is: 196 meters.
Location is approximately 150 metres from Ku-Ring-Gai Chase Road.
Remains of the round 'rock cairn' are clearly evident, but post and vanes have disappeared.
rogerw3 has viewed 1972 data referring to the "trig plug found" with mention that heavy bush clearing was required.
Hints
Gurer ner frireny genvyf gung jvyy gnxr lbh pybfr gb gur gevt fvgr, ohg fbzr ohfu onfuvat jvyy or erdhverq. |
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Decode |
Logs
I've been ;looking at this one for quite a while. I started at a track about 100 metres back from the trig, not straight in from the road. The walk in was easy.
Rated: for Overall Experience
#21
I used to run the track from Mt Colah to Kalkari visitor centre weekly but have been a bit slack lately. Came by car on this hot afternoon after visiting some virtuals at the bottom of the hill. Today was the first time I'd ventured off track but the bush bashing was pretty light. There was more left than I was expecting.
I used to run the track from Mt Colah to Kalkari visitor centre weekly but have been a bit slack lately. Came by car on this hot afternoon after visiting some virtuals at the bottom of the hill. Today was the first time I'd ventured off track but the bush bashing was pretty light. There was more left than I was expecting.
Rated: for Overall Experience
Had this one planned earlier for a 2010 Summer Scavenger Series hunt but never made it out. Today was not too hot but still a bush bash up from the road until I hit a foot trail. It took me within 40m then it was back into the bush. Found the old pile, now much depleted and certainly no sight lines left! Still worth the visit!
Rated: for Overall Experience
The last trig found this time while on a short visit to Sydney. Again, this is one I had found a lot earlier, and revisiting it for some photos. FIRST found: 1710, Wednesday, 25 July, 1984, with a Grid Reference of 2772 7253, and a map height of 190m - not named in my Trig Stations log book. GR is AusGeo66.
This time I found it very close to sunset, @ 1910. Just a partly depiled rock cairn, with no pole or vanes.
This time I found it very close to sunset, @ 1910. Just a partly depiled rock cairn, with no pole or vanes.
Rated: for Overall Experience
A nearby trig I'd neglected. Located an old vehicle trail, from about S33 40.32 E151 08.65, and took it to within 30m of the trig, so not too difficult to get to. Found the partly depiled cairn and some more of its stones a few metres away. The Garmin showed S33 40.286 E151 08.561, well within reason. For the return trip, continued N along the old trail then followed one of the many old tracks, of clearly human origin, NW back to the main track near the power line. Definitely, the short, easy route.
Rated: for Overall Experience
Out and about for a bushwalk from Bobbin Head. Went off trail around 170m before the trig and worked through the scratchy stuff to the trig. The coordinates are pretty spot on. There has been no change in the condition of the trig since the previous finders visited a few years ago. Always nice to find an old cairn even if it has been party depiled.
I took a shorter and easier way out (around 100m to the trail and not as scrathy) then continued walking past a number of previously found caches and back to Bobbin Head via the Gibberagong Trail. Found at 7:54 am.
I took a shorter and easier way out (around 100m to the trail and not as scrathy) then continued walking past a number of previously found caches and back to Bobbin Head via the Gibberagong Trail. Found at 7:54 am.
Rated: for Overall Experience
After the disappointment of the 'Barbara' Trig this one was a welcome sight. Found with pjmpjm only a short bush walk, not really a bash. This Trig was unpiled and the locating pin is long gone but the base of the cairn is still very evident, no trace of the post and vanes, no doubt the post burnt down long ago.
Rated: for Overall Experience
Following rogerw3's excellent work in determining the correct coords together with pjmpjm we returned to the scene of the DNF. GPSr had us on the western side of the ridge as expected. Parked next to the row of rocks designed to keep 4WDs out of the bush and headed in. pjmpjm was so confident he carried a coffee in hand throughout!
Found a well used track which seemed to head in the general direction but gradually headed away once we got to about 80 metres from the GZ coords. Bushbashed from there towards it, not too bad, easy after Ryland last weekend! After a few minutes we spotted the characteristic ring of large stones in the bush. Indeed it's almost disappeared with the growth around and even through it. The centre rocks have been entirely removed and only a 'well'-like circle of the larger stones remain. Probably in the worst condition I've seen since Ellis. Still it's a huge thrill to rediscover a part of our history and we were probably the first people to go there in years.
Three thumbs up for rogerw3's coords which were spot on.
Found a well used track which seemed to head in the general direction but gradually headed away once we got to about 80 metres from the GZ coords. Bushbashed from there towards it, not too bad, easy after Ryland last weekend! After a few minutes we spotted the characteristic ring of large stones in the bush. Indeed it's almost disappeared with the growth around and even through it. The centre rocks have been entirely removed and only a 'well'-like circle of the larger stones remain. Probably in the worst condition I've seen since Ellis. Still it's a huge thrill to rediscover a part of our history and we were probably the first people to go there in years.
Three thumbs up for rogerw3's coords which were spot on.
Rated: for Overall Experience
Found using rogerw3's extremely accurate (and newly calculated) coordinates, together with Yurt.
A short and fairly easy bush bash off the Kur-Ring-Gai Chase Road (less than 150 metres) brought us to a fairly large, round construction, with a kind of wide 'hole' in the centre. Now nearly smothered by the bush, it looks like the 'round tower' rock cairn was 'de-piled' at some point, but the structure is still unmistakably a trig -- and almost exactly on top of rogerw3's coordinates -- and nicely shaped. In fact, the coordinates might be absolutely spot on.
We searched for a while to see if we could locate the discarded 'location pin' or other remains of the post or vanes, but this site has been obviously abandoned for a very long time.
Quite a feeling of satisfaction! I've now 'unarchived' the trig.
'Three Thumbs Up' for the re-discovery and adventure . . .
A short and fairly easy bush bash off the Kur-Ring-Gai Chase Road (less than 150 metres) brought us to a fairly large, round construction, with a kind of wide 'hole' in the centre. Now nearly smothered by the bush, it looks like the 'round tower' rock cairn was 'de-piled' at some point, but the structure is still unmistakably a trig -- and almost exactly on top of rogerw3's coordinates -- and nicely shaped. In fact, the coordinates might be absolutely spot on.
We searched for a while to see if we could locate the discarded 'location pin' or other remains of the post or vanes, but this site has been obviously abandoned for a very long time.
Quite a feeling of satisfaction! I've now 'unarchived' the trig.
'Three Thumbs Up' for the re-discovery and adventure . . .
Rated: for Overall Experience
I was passing through the National Park using my new NP pass and thought I'd stop and have another look for this. All the topo maps have shown this trig as still being there and experience has shown that if so, there is always something there, if only a permanent marker. Unfortunately I forgot to take my topo map but decided to head beyond the given coords which place the trig right next to the road where the old fire trail meets it. The elevation here is only about 185m as noted by pjmpjm. I headed up the hill without knowing the listed elevation at 195 metres but thought that trigs were usually at the highest point. At the top of the ridge it was about 205 metres and I walked right around on something of a track back to where I started without seeing anything trig-like.
I then headed back in and found, about 30m from the listed coords at the correct elevation (I'd checked on the phone by then) an area which looked like it could have hosted a trig. There were enough cairn sized stones strewn about and you could see where a few trees had been cut back in the past. However I was unconvinced. I took a mark and a photo for the record but I still think it's there somewhere.
Back home I checked the topo map and it would seem that Allison should be located on the south west (not south east) edge of the ridge probably about 100 metres from the listed coords. The power lines are a landmark and the map has them just under 200 metres from the trig position.
This warrants further investigation!
I then headed back in and found, about 30m from the listed coords at the correct elevation (I'd checked on the phone by then) an area which looked like it could have hosted a trig. There were enough cairn sized stones strewn about and you could see where a few trees had been cut back in the past. However I was unconvinced. I took a mark and a photo for the record but I still think it's there somewhere.
Back home I checked the topo map and it would seem that Allison should be located on the south west (not south east) edge of the ridge probably about 100 metres from the listed coords. The power lines are a landmark and the map has them just under 200 metres from the trig position.
This warrants further investigation!
Trigs are meant to be fun and clear, I think pjm has done enough work to save the rest of us a visit 
I had a very comprehensive looking around these coordinates this evening after work, and circled out to nearly 100 metres, but never found the slightest sign of the supposed trig.
This area is within the National Park and there's a kind of fire trail that runs off Ku-Ring Gai Chase just at this particular point. It's grown up now, but a footpath remains, and runs through the electrical pylons nearby.
I found a metal footing of some kind about 10 metres from GZ, quite near the road, but think it must have been part of a gate. I photographed it with my GPSr, just in case.
After about 40 minutes of wandering around in an outward spiral, I decided to give up. Although the Allison Trig is supposed to be at 196 metres, the highest elevation around here is about 190 metres and the published coordinates are only at about 186 metres. If there's an old trig here, it's very well-hidden by the bush.
I suspect, however, that it may have been destroyed or removed.
This area is within the National Park and there's a kind of fire trail that runs off Ku-Ring Gai Chase just at this particular point. It's grown up now, but a footpath remains, and runs through the electrical pylons nearby.
I found a metal footing of some kind about 10 metres from GZ, quite near the road, but think it must have been part of a gate. I photographed it with my GPSr, just in case.
After about 40 minutes of wandering around in an outward spiral, I decided to give up. Although the Allison Trig is supposed to be at 196 metres, the highest elevation around here is about 190 metres and the published coordinates are only at about 186 metres. If there's an old trig here, it's very well-hidden by the bush.
I suspect, however, that it may have been destroyed or removed.
Rated: for Overall Experience
