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What is this, Dunmow airfield?

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What is this, Dunmow airfield?

Old 16th May 2020, 21:05
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UV
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What is this, Dunmow airfield?

Was out walking around the old Dunmow airfield and came across this. It was positioned at the very beginning of the old runway 22 on the left hand edge, where the perimeter track enters the runway.
The top was removable and you could see down the round circular vertical shaft (about 3 inches in diameter) to about 2 foot where there was some water.
Any ideas?


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Old 17th May 2020, 07:50
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Judging by the dead grass around it I wouldn't drink the water.

It could well be a septic tank vent dating from the days before it was an airfield. Or a power/communications connection point?

Last edited by Fareastdriver; 17th May 2020 at 08:58.
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Old 17th May 2020, 12:51
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I did wonder if it was anything to do with FIDO, because of its position,
but Dunmow isn't on any of the FIDO equipped lists I have seen
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Old 17th May 2020, 16:17
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That thing looks in remarkably good condition for something that's been there for over 70 years. Suspect it's agricultural. The vegitation is fine on one side and dead on the other, suggesting something has leaked out to kill it and fairly recently.
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Old 17th May 2020, 23:24
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Grass killed and top free to move? It's being maintained with weed killer and grease?

High pressure plumbing and you took the cap off? What if thousand-psi water had come out? 4 questions.
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Old 18th May 2020, 10:53
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Originally Posted by Loose rivets View Post
High pressure plumbing and you took the cap off? What if thousand-psi water had come out?
Had it been under high pressure I doubt that the OP could have removed the cap unless, when he set out for his walk, he'd thought to take specialised tools with him!
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Old 18th May 2020, 11:11
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It looks like some kind of modern groundwater monitoring point to me. They're usually in a bigger diameter pipe, but the description sounds about right. Are they planning any developments nearby that might need a report?
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Old 18th May 2020, 11:16
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It might help to know if the cap seals the top of the pipe, or if liquid/vapour can vent from under the box section on the side.
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Old 18th May 2020, 18:14
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I wonder if there is anything buried there?
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Old 18th May 2020, 18:23
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Originally Posted by Blue_Circle View Post
It looks like some kind of modern groundwater monitoring point to me. They're usually in a bigger diameter pipe, but the description sounds about right. Are they planning any developments nearby that might need a report?
Land Securities (wretched developers) now own the old airfield and have applied to build 10,000 houses on it.
However the rust on the “cap” leads me to think it has been there for quite a few years
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Old 18th May 2020, 19:30
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Don't blame the developers exclusively. Someone has taken their thirty pieces of silver to enable them to acquire the land to permit its exploitation.
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