hi all,just noticed some very large boulders going into the river,opposite the new hospital in mountain ash.there seems some sort of river diversion going on.Anybody know exactly whats going on.You can see the works from the footpath going through the 'peace park'.
Andy
Yes it appears to be the
Yes it appears to be the start of a large flood prevention scheme for Ysbyty Cwm Cynon the new £65 million hospital.
After the last spell of heavy rain the riverbank on two sides of the hospital seems to have eroded quite a lot in one part.
When you allow a known floodplain Tirfounder fields about a mile up the valley to be raised up by almost 1 meter for the construction of houses you can expect the river to flow faster down the valley and expect problems in the future.
It all adds cost to the new hospital after all we are paying for the idiot’s the people that allow building on floodplains.
I think the large boulders need to be placed below the bed of the river otherwise they will be undermined by the floodwater
River in flood
http://www.aberdareonline.co.uk/content/river-cynon-5-9-08
Riverbank eroded
http://www.aberdareonline.co.uk/content/ysbyty-cwm-cynon-13-6-2012-0
River in flood
http://www.aberdareonline.co.uk/content/river-cynon-5-9-08-0
http://www.aberdareonline.co.uk/content/ysbyty-cwm-cynon-13-6-2012-3
an amateur photographer,in
an amateur photographer,in mountain ash.
thanks Lewis, for the information.much appreciated.
andy
This was part of the
This was part of the agreement in building the new hospital, I saw on the RCT Website a planning application to do this back about 18 months ago so this isnt anything new or in response to recent bad weather.
If I can find the link I'll post it as the application was about 18 months ago I think
When the site of the new
When the site of the new hospital was first proposed it lead to the formation of the 'Save Aberdare Hospital Committee'. The committee tried to sow the seeds of doubt about the Mountain Ash site by saying it was regularly flooded, both historically and in recent times.
The site of the new hospital has never flooded, the natural flood plain at the bend in the river is the playing fields on the northwestern border of the river. It is regularly flooded to a depth of a metre.
The committee also stated that the hospital site had seen flood water of 10 feet or more. That statement made my jaw drop as prior the school playing fields it was used for the tipping of waste from the Deep Duffryn Colliery, which stood some 50 feet above the present level. That would have been some flood to behold. My father's house would have been a goner that for sure.
The new defences are not so much for flood but for river erosion. Any banking on a river's meander is prone to erosion and the large rocks will also help to prevent this. The underlying soil of the site is particularly sandy as a result of the last ice age. It has caused problems in the area previously, in fact, the sinking of Deep Duffryn was nearly abandoned because of it.
I think the application for
I think the application for (Additional information received with regards to Flooding Consequences and Transport Assessment). Were in place before the council on 27/09/2005.
With regard to the new hospital site flooding as you can see from the Environment agency Risk of Flooding from Rivers map the new hospital is quite safe from flooding
http://www.aberdareonline.co.uk/content/environment-agency-risk-flooding...