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TOPIC: The reconfigured Palmers Green Triangle

The reconfigured Palmers Green Triangle 20 Nov 2017 00:26 #3351

Colin Younger Colin Younger's Avatar Topic Author Offline

This is the Palmers Green Triangle almost complete and working well. The sign post needs to have the fingers fitted, there ought to be a seat, and we hope an information board giving some of the history of the Triangle
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The reconfigured Palmers Green Triangle 23 Nov 2017 11:50 #3360


Love it. Have driven and cycled, works excellently for both, massive improvement all round. Can't wait to EMH is completely finished and enforced.

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The reconfigured Palmers Green Triangle 26 Nov 2017 18:38 #3367

Colin Younger Colin Younger's Avatar Topic Author Offline

I've had a reply from Richard Eason, Cycle Enfield Consultation Manager, to questions about the completion of work on the Triangle, which I summarise as follows. I've added some info about the tree.

The tree in the triangle is a Pin Oak, selected at this size to give it the best opportunity to settle in. This is a challenging location in terms of underground toilets etc. Lots of unseen work occurred to create the best conditions for it.
[Information added by me: Pin Oaks originated in North America but have been planted in the UK since 1800. It is more slender and elegant than the native oaks, with a more conical canopy that makes it suitable for city planting where space is limited. It thrives on heavy clay in built up urban areas. It has good autumn colour: russet bronze flushed with deep orange. Pin oak is a medium-sized tree growing to 18–22 metres (59–72 ft) tall, with a trunk up to 1 metre (3.3 ft) diameter. It has an 8–14-metre (26–46 ft) spread.]

Unfortunately, despite trying, it hasn't been possible to plant trees in outside what was Starbucks. The area is riddled with utilities and a whole host of old cables and pipes - this caused a lot of challenges. However a rain garden has been placed in the area.

The brick planter at the apex of the Triangle will have benches added to it (made to measure) on all 3 sides. Rather than create seating around the tree additional planting and some up-lighting has been built in. [Uplighters were suggested at one of the design workshops.]

It is possible that some information about the history of the Triangle including about the suffragettes might still be included.

There may be scope for additional free standing planters - at the moment the focus is on completing the remaining works along the high street. Once complete other possibilities could be considered.

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The reconfigured Palmers Green Triangle 28 Nov 2017 10:50 #3369


Yes, good to see a tree back on the Triangle. It does look spindly at the moment, but I hope it will flourish in the new forest that has been created - I counted 16 other vertical objects around it of various heights. New street clutter or what?

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The reconfigured Palmers Green Triangle 30 Nov 2017 16:51 #3378


While I largely welcome the work that has been done on the Triangle, I can't imagine why anyone would want to sit in the middle of what is in effect a large traffic island. Will face masks be provided? In the mean time, could not the rather awkwardly placed Christmas tree, with its ugly 'skirt' of advertising hoardings, be sited there?

By the way, excuse my ignorance, but what is a 'rain garden'?

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The reconfigured Palmers Green Triangle 30 Nov 2017 21:46 #3381


Here's one definition of rain garden: "A rain garden is a planted depression or a hole that allows rainwater runoff from impervious urban areas, like roofs, driveways, walkways, parking lots, and compacted lawn areas, the opportunity to be absorbed." Given the Triangle's history, and all the works that were necessary to create the new junction, I can well understand the need for one.

Personally I haven't stopped to enjoy the new island; just cycled through or paused at the traffic lights. As far as its visual appearance is concerned I'll wait till after Christmas to take a good look.

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The reconfigured Palmers Green Triangle - what is a Rain Garden? 30 Nov 2017 22:38 #3383


Rain gardens - even small ones like on the Triangle - are small parts of a big scheme to improve the quality of the water in streams and rivers - the Lea and the Thames = and reduce flooding. One little rain garden doesn't have much impact, but combined with many others it has a noticeable effect.

Rain gardens are one form of "sustainable drainage system" or SuDS.

So if there is sustainable drainage, then logically there must be unsustainable forms of drainage. Unfortunately, there's a lot of them around. Gutters and drains in roads, for example, tarmaced over gardens. When it rains heavily on impermeable surfaces, large quantities of water rush along the gutters and go down the drains. That water, full of impurities from the road surface, such as heavy metals, ends up flowing into streams - locally, the Pymmes Brook, thence into the Lea, and is damaging to flora and fauna (or may encourage some undesirable flora and fauna at the expense of more desirable ones).

The idea of sustainable drainage is to get water to soak into the ground and/or be slowed down and filtered by vegetation and "wetlands". The net result is that water flows more evenly into the rivers istead of in spurts and less water rushes down tarmaced hills and causes flooding at the bottom.

The above is terribly oversimplified. The page below explains it much better than I ever could and has some pictures:

www.thames21.org.uk/sustainable-drainage-systems/

Good examples of SuDS round here are in Grovelands Park, Houndsden Spinney (a great place for wild garlic!) and, above all, Firs Farm.
The following user(s) said Thank You: David Eden

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