Barrier at South Hinksey

A red letter day for South Hinksey village, with temporary barriers deployed (in a trial exercise) for the first time!

The exercise went well with the EA teams getting the barriers up in 3-4 hours from delivery to site. In a real flood event in the wet it might take longer and pumps would have to be deployed too but even so this would represent a good time. The residents will now feel very much more secure as winter approaches. Let’s hope the barrier isn’t needed but if it is it will be there. A big thank you to all involved.

Flood exercise today

The flood exercise mentioned in the last post, testing and demonstrating readiness to deploy defences, is under way today. In South Hinksey temporary barriers are being set up by the Environment Agency (EA). At Bullstake Close on the Botley Road the barriers there, which have been used before in a flood, will be erected; and fire crews are showing how the pipe which has been installed under the Botley Road can be used to deal with flood water and reduce the flooding of the road.

For South Hinksey this is a very reassuring demonstration of the ability to now defend the village from flooding. Such barriers have never been used here before.

Of course Oxford still needs a bigger, more permanent scheme – in the form of the Oxford Flood Alleviation Scheme. The OFA update in the previous post summarises the present position – the Scheme is under way, albeit delayed. In the meantime today’s activities show that we will not be without  protection in the interim.

Emma Howard-Boyd, Chair of the EA, and Sir James Bevan, Chief Executive, are in South Hinksey today to see what’s being done and meet the teams and there is no doubt that protecting Oxford in both the short and long term is being taken very seriously.

Our thanks to everyone who is working hard on behalf of the many local residents, businesses and other organisations affected by flooding.

OFA Update / OFAS & Flood Exercise

This update has recently been sent to those on our mailing list.

Dear OFA contact,

We last sent out an update in Oct 2019, just after the news about the problems with the A423 bridge (southern bypass) and likely delays to the Oxford Flood Alleviation Scheme (OFAS). OFA is still active and has been participating in meetings of the Sponsoring Group for the OFAS scheme and has also held separate meetings with the Environment Agency team about water course maintenance since our last update.

Despite the A423 issues, and the challenges presented by coronavirus, the OFAS scheme continues to progress. The EA and the County Council have agreed a collaborative approach to replacing the A423 bridge and constructing the OFAS scheme. This should save on costs for OFAS, and reduce the level of maintenance required in future.

The EA withdrew the original planning application earlier in the year and is currently revising this to incorporate the new A423 arrangements, and to update the documents on some other aspects of the scheme. Once these are resubmitted to the planning authority the public will have a fresh opportunity to comment on the plans. The EA is continuing to meet with objectors to the scheme with a view to trying to address outstanding areas of public concern.

Because OFAS is now expected to be delivered two years later than originally expected it is important that effective flood response procedures are in place in case a major flood event happens in the next few years. The EA, Fire Brigade and the local Council officials will be holding a practice response on 20 August to test aspects of current procedures. Because of coronavirus these will not involve the pubic.

The text of a recent update from the Environment Agency is pasted below which provides some additional information on OFAS and other matters,

OFA Steering Group

Oxford Scheme update

A423 bridge replacement

Oxfordshire County Council began the propping work on the A423 Kennington Railway Bridge in July.

Replacement of the A423 Bridge has provided an opportunity to design and build the bridge and the flood scheme together. This allows us to reduce disruption during construction and ensure the best use of public money. The updated design will use open channels instead of culverts to allow the flow of floodwater under the bridge. This will provide a better environment for wildlife and requires less maintenance.

The bridge is at the southern end of the scheme and during a flood, water would need to pass underneath it to re-join the River Thames. This capacity needs to be in place before the scheme is constructed to avoid increasing flood risk elsewhere. We also need to have all approvals, including planning permission and our Compulsory Purchase Order secured.

South Hinksey Archaeology

If you’ve been walking near South Hinksey, you may have spotted our contractors on site. We are carrying out archaeology surveys in a field near South Hinksey village to check whether the area is suitable for us to use as the main compound for when we construct the scheme. The archaeology surveys will determine whether there are any historical artefacts in the field. We want to ensure there’s no risk of us damaging any artefacts or remains. Once we have finished the investigations, we will remove our equipment from the site and reinstate the fields.

Kendall Copse Ground Investigations

To complement the new A423 bridge replacement, we are reviewing the design of the scheme around Kendall Copse, near Kennington.

From 10 August, we will be digging trial pits and drilling boreholes to understand the ground conditions beneath the site in order to finalise these designs.

Oxford Flood Incident Exercise

To ensure our flood protection plans are well-tested, the Oxford Flood Alleviation Scheme partners and emergency responders will be practicing their incident response plans on 20 August 2020.

The flood response exercise will consist of:

 •temporary flood barriers in South Hinksey and Bullstake Close

•pumps to remove flood water along Botley Road

Due to the current Government guidance on public gatherings, we won’t be able to invite members of the community to attend. We will be sharing updates on Twitter and Facebook as the exercise progresses. We will also share video footage of the temporary barriers and pumps so you can see our field teams in action.

Managing your flood risk

During the summer months, flood risk might be low on your list of priorities, but Environment Agency officers are thinking about it year-round. Throughout the year our operations staff carry out inspections and clear debris to keep main rivers moving. To report a blockage that could cause flooding call our 24 incident hotline: 0800 80 70 60.

You can also find out what maintenance is planned in your area: environment.data.gov.uk/asset-management/index.html

Stay prepared by signing up for flood alerts and preparing a flood plan: https://flood-warning-information.service.gov.uk

  

Want to know more?

If you have any questions or want to be added to our mailing list, please contact us at: OxfordScheme@environment-agency.gov.uk

Oxford today

River levels in Oxford today have not risen as far as had been predicted. So good news so far. The EA is watching things closely for the whole area.

In the case of South Hinksey, the barriers which were delivered there this morning are to be kept in reserve for now. Barriers for other areas remain in reserve at Osney.

Barrier deployment

Temporary flood barriers will be moved from Osney to South Hinksey tomorrow, in readiness for possible deployment by the Environment Agency tomorrow or Wednesday – if conditions require. The situation following the recent rains is being closely monitored and analysed – what happens will depend on these assessments. Similar vigilance applies to the deployment of barriers for Osney Island and at Hinksey Park on the Abingdon Road: barriers for both these areas are ready at Osney if needs be. These latter areas have had temporary barriers before, whereas for South Hinksey, if it happens, it will be a first, following making the village ‘barrier-ready’. Temporary barriers are supported by high volume pumps to deal with any water leaking through the barrier or arriving within the barrier as rising groundwater.

 

Gravel mining – Be careful what you wish for

Gravel mining in Oxfordshire

The County Council is responsible for minerals and waste planning in Oxfordshire, including the preparation of a local plan setting out planning policies for mineral working and supply and for waste management. The Council is preparing a new Oxfordshire Minerals and Waste Local Plan, which will comprise: Part 1 – Core Strategy; and Part 2 – Site Allocations.

Sand and gravel is the most common mineral resource in Oxfordshire.

Part 1, the Core Strategy was approved and adopted in September 2017. It sets out the vision, objectives, spatial planning strategy and policies for meeting development requirements for the supply of minerals and the management of waste in Oxfordshire over the period to 2031. Para 4.21 reads:

“4.21 Policy M2: Provision for working aggregate minerals

Provision will be made through policies M3 and M4 to enable the supply of:

  • sharp sand and gravel – 1.015 mtpa giving a total provision requirement of 18.270 million tonnes
  • soft sand – 0.189 mtpa giving a total provision requirement of 3.402 million tonnes
  • crushed rock – 0.584 mtpa giving a total provision requirement of 10.512 million tonnes

from land-won sources within Oxfordshire for the period 2014 – 2031 inclusive.

Permission will be granted for aggregate mineral working under policy M5 to enable separate landbanks of reserves with planning permission to be maintained for the extraction of minerals of:

  • at least 7 years for sharp sand and gravel;
  • at least 7 years for soft sand;
  • at least 10 years for crushed rock;

in accordance with the annual requirement rates in the most recent Local Aggregate Assessment, taking into account the need to maintain sufficient productive capacity to enable these rates to be realised.”

Part 2 is the Site Allocations, currently being prepared. A consultation began in August 2018 (Oxfordshire minerals and waste local plan, part 2 – site allocations, issues and options consultation); comments had to be in by 3 October 2018.

One of the sites that is nominated and so under consideration is Site number SG-37: Land at Grandpont and South Hinksey. This is a 20hA site, with an estimated yield of 1.5 million tonnes.

A map of the area can be seen on p. 63 of this document MWLPSitesIssuesOptionsConsultation

We commented (as did the Environment Agency). Our own objection read:

“Site number SG-37: Land at Grandpont and South Hinksey.

This area is the subject of a major planning application currently being considered by Oxfordshire County Council for the construction of the Oxford Flood Alleviation Scheme. For this reason we ask that this site should not be taken forward.”

OFA comment

Many of the easiest to mine areas in the County have been mined, increasing pressure on those that remain. While there are logistical difficulties to mining at Site SG-37, Land at Grandpont and South Hinksey, the demand for gravel seems likely to continue unabated with road and rail schemes and new housing very much on the agenda both nationally and in Oxfordshire. In our opinion it is far from impossible that in future this Site might be chosen for mining.

The Oxford Flood Alleviation Scheme (the Scheme) is not designed or intended in any way to prevent gravel mining in the future.

However, having said that, it seems to us that having the Scheme in place would make gravel mining at this site much, much less likely. We say this because mining for gravel once the flood alleviation scheme is built would compromise its design and its proper functioning. (The very fact that the Scheme is under consideration is probably already affording protection in the present consultation round.)

Disclaimer: this present brief note is intended to explain the issues as we understand them. There is a great deal more information available in the relevant County documents and on their website, e.g.

https://www.oxfordshire.gov.uk/residents/environment-and-planning/planning/planning-policy/minerals-and-waste-policy/new-minerals-and-waste-plan  

https://www.oxfordshire.gov.uk/residents/environment-and-planning/planning/planning-policy/minerals-and-waste-policy/core-strategy#adoption

which anyone particularly interested should read for themselves.

New Chair of RFCC visits Oxford

The recently appointed new Chair of Thames Regional Flood and Coastal Committee (RFCC), Professor Robert Van de Noort, visited Oxford on 19 October with EA staff. He was briefed on the Oxford Flood Alleviation Scheme and then shown the Seacourt area at the western end of the Botley Road, which marks the northern end of the Scheme.

We were pleased to meet Professor Van de Noort in South Hinksey, where he went on to see both the lie of the land where the channel will come past the village and on to Kennington to the south, and the earthworks done in the village itself to make the village ‘temporary barrier ready’ for the coming winter and beyond.

OFA Update, August 2017

We have just sent this to the people on our mailing list:

Since our last update in February this year we have seen further steady progress on the Oxford Flood Alleviation Scheme (OFAS), designed to reduce flood risk for hundreds of properties in Oxford and nearby. We have been involved in several ways:
  • As part of the Sponsoring Group, the body representing the various partners in the scheme and having overall responsibility for it.
  • Urging that maintenance be provided for in perpetuity rather than just 10 years. We have proposed setting up a dedicated body to be responsible for this; this idea has received good support. We are discussing with the Environment Agency and partners other possible approaches, and if an independent body, what corporate structure might be best.
  • We have been working with the Freshwater Habitats Trust and the Environment Agency to try to ensure that the scheme (while it will regrettably involve some environmental losses) can incorporate significant environmental enhancements too, including the important freshwater habitat.
  • We are supporting the EA if their efforts to close the funding gap for the scheme – currently at $4m. This money needs to be found by the end of November if the scheme is to go ahead.
  • We have participated in a number of public consultation events about the route of the scheme.
OFAS is running to schedule, and assuming the money is found the next major step is application for planning permission, probably in spring 2018.
 
Local matters
Earl Street has a new, dedicated, mobile pump that will be available to them in the event of future floods. Nick Hills, an Earl Street resident and member of our Steering Group, applied successfully for a generous grant, £20,000, from Scottish & Southern Electricity Networks.
South Hinksey groundworks have been completed, meaning the village is now ‘temporary barrier ready’ when floods next threaten. Many thanks to the Vale of the White Horse District Council for funding and to the Environment Agency, especially engineer Magnus Williams, for all the hard work that’s made this happen.
Both areas can now look forward to the coming winter with more confidence.
Seacourt Park & Ride
As reported previously we opposed the application by Oxford City Council to extend this P&R into the flood plain. The application did not, in our view, show that flood risk would not be increased. We believe that a revised application will be advertised at some point and we will scrutinise this with care. The timeframe for this is currently not clear.
Local MPs
Following the elections this year we have two new MPs, Anneliese Dodds for Oxford East, and Layla Moran for Oxford West & Abingdon; we are in the process of meeting and briefing them on flood related matters. Both MPs are supportive of the need for a flood scheme.
OFA Steering Group

South Hinksey ‘barrier-ready’ works all but complete

In South Hinksey, the works designed to make deploying temporary defences, should flooding threaten, quicker and easier, are almost complete.

Three flap valves have just been installed on pipes which connect into field ditches. These non-return valves will allow water out from within any temporary barrier but not allow it back in from the flooded area outside.

Elsewhere wide garden gates have been installed, reinforced fences built, and removable fence panels fitted.

A very few minor snagging items remain, but the scheme is otherwise complete and fully ready for temporary barriers. Many thanks to the Vale of White Horse District Council for funding and to the Environment Agency for organising the work – not least to engineer Magnus Williams who has managed the scheme from its inception to its completion. Thanks too to farmer Nick Frearson, and to the horse owners for their cooperation during the works.

OFAS: drilling a borehole

Oxford FAS ground investigations: a borehole being drilled this afternoon in South Hinksey.

The A-frame percussive drill dug 9 metres down, below the alluvial layer, the gravel layer and 5 metres into the clay.
The capped pipe is a monitoring site where the changes in ground water depth over time can be observed.