What are these columns near my local reservoirs?
Discussion
There are two reservoirs just up the valley from me and dotted around the area are perhaps 8-10 concrete columns with metal lids. They’re around 3’ tall and positioned in various locations in relation to the reservoirs, some quite close by and some 200m+ away or even 50m above the water level.
Earlier I walked up to one and opened the lid to find what you can see in the photo - a concrete core with a metal cap and hessian around the outside. I was tempted to turn the handle on the cap but didn’t want to in case something happened or broke!
Does anyone have an idea what they’re for? A quick Google suggests that Kern in Switzerland manufacture/d surveying equipment such as theodolites so perhaps they are trig points for monitoring the dams. That’s all I could think of.
Earlier I walked up to one and opened the lid to find what you can see in the photo - a concrete core with a metal cap and hessian around the outside. I was tempted to turn the handle on the cap but didn’t want to in case something happened or broke!
Does anyone have an idea what they’re for? A quick Google suggests that Kern in Switzerland manufacture/d surveying equipment such as theodolites so perhaps they are trig points for monitoring the dams. That’s all I could think of.
weeboot said:
"Kern heavy-duty aluminum cast bayonet lock adapter plate #196 with 5/8 x 11 brass insert or 3x mounting holes for installation. Exceptionally rigid and used with tooling stands or pillars. Large pads accepts all Kern forced centering instruments."
Well done.http://www.swisstek.com/tripods_adapters.htm
ETA
All credit to weeboot - I just posted the url his text led me to.
Edited by Goaty Bill 2 on Tuesday 6th February 17:28
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