Flood Risk to our Area

Dear Mr Lester and Mr Rumble, please excuse this email at this unprecedented time however we need to continue with as much a normality as possible and as always there are time constraints, we are concerned the quarry application we are questioning may come to a DCC hearing before we have completed this line of enquiry if we do not continue now.​​ 

 

A s I understand you are the Lead Flood Authority that covers our part of Hertfordshire, this being Ellenbrook, Smallford and Salisbury village, in and around the Hatfield and St Albans area. If I have this wrong please advise us soonest.​​ 

 

I write to you as concerned residents of the Ellenbrook Area of Hatfield, Salisbury Village and the residents of Smallford St Albans.​​ 

 

We are extremely concerned over the potential increased flood impact on our area by the quarry proposed at the Old Hatfield Aerodrome, Hatfield now known as Ellenbrook Fields.​​ 

 

As the lead flood risk authority protecting us from the risks of​​ flooding,​​ we would like to know what research/work you have done to ensure that this proposed quarry does not end up flooding our streets and homes. ​​ 


Please inform us of the rationale you have relied upon and that has led to your​​ conclusion there is no greater flood risk should this quarry go ahead.​​ 

 

This area is a mix of high and medium flood risk already as can be seen from the government own flood risk maps of the area, see via the following links​​ 

https://flood-warning-information.service.gov.uk/long-term-flood-risk/map?easting=520904&northing=208024&address=100080957137&map=RiversOrSea​​ 


https://flood-warning-information.service.gov.uk/long-term-flood-risk/map?easting=520904&northing=208024&address=100080957137&map=SurfaceWater​​ 

 

These maps indicate that the actual university grounds to the east of the site, the houses adjacent to Ellenbrook Fields part of Salisbury village, again east of the site are at a high risk of flooding​​ 

 

As you no doubt know we suffer from flooding already in a number of places that are generally South or East of the proposed site and land that lies lower the further south you go, including but not limited to:-​​ 

  • the junction of Albatross Way and the A1057 at the Ellenbrook Lane roundabout,

  • the entrance and road by Popes Farm, A1057

  • the brook running along Ellenbrook Lane​​ 

  • the brook running along Wilkins Green Lane 

  • Wilkins Green Lane near the Bridle path

  • The walk-way between the Ellenbrook Fields and the adjacent housing at Salisbury Village

The houses in various streets within the Ellenbrook area are affected by either a high or medium risk of flooding as things stand, what assurances can you give us that we will not be put at a higher risk should the quarry go ahead.​​ 



To come to your conclusions, have you studied the applicants Ground Water Management Plan and considered​​ the short and long term​​ effects:-​​ 

  • of diverting ground water around the northern perimeter to flow south (the down gradient direction) along the eastern border of the site

  • of removing permeable materials (sand and gravel etc) and infilling with less porous material such as building rubble etc

  • that particles of silt from such infill material will have on the permeability on the surrounding areas of land that would normally act as a soak away

These will all impact on the areas marked high risk in the above mentioned government flood maps?​​ 

 

To summarise we would like the answers to the following questions​​ 

 

  • As the lead flood risk authority protecting us from the risks of​​ flooding,​​ we would like to know what research / work you have done to ensure that this proposed quarry does not end up flooding our streets and homes. 

  • Please inform us of the rationale you have relied upon and that has led to your conclusion there is no greater flood risk should this quarry go ahead.

  • To come to your conclusions, have you studied the applicants Ground Water Management Plan and considered the short and long term effects:-

    • of diverting ground water around the northern perimeter to flow south (the down gradient direction) along the eastern border of the site

    • of removing permeable materials (sand and gravel etc) and infilling with less porous material such as building rubble etc

    • that particles of silt from such infill material will have on the permeability on the surrounding areas of land that would normally act as a soak away


This is an initial request and we are currently carrying out our own investigations and may return to ask you further questions, meanwhile​​ I look forward to your urgent response, if​​ necessary,​​ please take this request as a Freedom of Information request ​​ 

Regards​​ 

 

John Jackson​​ 

07941 302 513​​ 

 

On behalf of the EARA Committee ​​ 

Local residents trying to preserve our community and local environment for future generations with no political affiliation.​​ Website -​​ www.ellenbrookresidents.org​​ 

 

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