Category: Maintenance

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Ground Survey of the Lower Field by GBG Geotechnics

Following the emergence of a depression or ‘hole’ not far from the centre of the Lower Field in late November 2019, Hertfordshire County Council commissioned a geophysical survey of the Field by GBG Geotechnics, Cambridge. A lengthy quite technical report on the survey was made available to FoBH and here we try to summarise its findings.

The hole was promptly surrounded by safety fencing and soon after by more fencing. The appearance of yet more fenced off areas last year led to some concern whether the whole field would be excluded to the public. We have no indication that this might be the case.

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Storm Ciara takes its Toll

This large tree fell on a path during Storm Ciara on Sunday, February 9th. The path is the second on the right after entering Spinney Lane (see arrow on map alongside) and it is blocking the path, unless you are really determined to get through!  Now cleared! It was on the big side for the Friends to clear, so the Council has been informed. No doubt they have plenty of debris to clear – hopefully they will be able to get to it soon.

More substantial trees have since fallen as shown below:

Photos: PC

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New Depression appears on the Lower Field

The depression in closeup is about 2 m wide and 0.5 m deep.

This small depression has appeared on the Lower Field and has been cordoned off. The Fontmell Close sinkhole was probably only 200 m away, although in this case it may be a consequence of the rubbish that was buried in the area.

Depression getting deeper and exclusion zone much extended
The Lower Field, showing the location of the depression. The diagonal mark across the field is the result of the temporary access route used in the Fontmell Close incident.

The field was surveyed in detail in 2015 since it is in the area covered by old clay pits and was the site of a rubbish tip. The company Carter Jonas was involved in the survey and is now in the process of reviewing the ground condition reports for the site.

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Repair of Vandalised Bench

This bench, which faces Heath Farm Lane, was badly damaged by an attempt to burn it. Now RM, with help from some pupils at Sandringham School, has done an excellent job of repairing it. The wood is English oak, which is very expensive – it fact it would cost several hundred pounds to make a bench like this, not counting labour.

Unfortunately, there have recently been other incidents of senseless vandalism. Attempts to burn other benches and rubbish bins as well as spray painting – it only spoils the Heath for the majority of users.

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Planned destruction of recently restored fence

A well planned act of wanton destruction took place on the path between Spinney Cottage and Harpenden Road last Thursday or Friday, 23rd/24th August. A fence that was recently repaired was taken apart and sawn up to make a ramp for people on bikes. It is very dangerous.

If you saw any activity in this area, we would like to hear from you (use FoBH Mail in the side bar). Any witness responding will not have their name divulged to anyone other than the police.

The wood and ramp has now been removed (6/9/18)

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Storm Doris – Trees suffering

This heavy branch (top photo) )was left across the track from Townsend Drive to the Ancient Briton as the result of Storm Doris. Our chainsaw was faulty, so we were reduced to muscle power and bow saws (inset).  As a result this precariously perched branch was moved out of the way.  A fallen tree in Harpenden Road caused traffic to be diverted to Townsend Drive/Waverley Road on Saturday afternoon.

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Japanese Knotweed on the Heath

Japanese knotweed, showing its characteristic zig-zag branch structure

There have been several outbreaks of the not unattractive, but very invasive plant Japanese knotweed on the Heath, mostly near the old Fire Station and behind the Judo Club. It is a major problem in that it grows very rapidly and can cause serious damage, especially to underground structures. A garden outbreak can easily be a reason to refuse a mortgage application.

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