Background reports

                                                                                                                                                               Page last updated: 22.12.2015
Links will be provided here to reports from the Environment Agency, B&NES, Bristol Water etc.

22 December 2015  The updated Chew Magna Parish Community Flood Plan 2015 is now available on the Chew Magna website ( http://www.chewmagna.org.uk/regdocs.html click to open). This is a comprehensive resource covering actions to be taken before or during flooding, responsibilities of all the various agencies, and a detailed schedule of contacts.

18 August 2015  Chew Magna Flood Modelling  At a public meeting on 28 July 2015 the Environment Agency gave a presentation of their computer modelling exercise into the September and November 2012 floods.  Copies of the two sets of presentation slides are attached (Chew Presentation July 2015 and Chew Magna Model Presentation Final click to open.  The EA has also provided a set of maps showing the flood extent and the modelling impacts - these maps are in the attached Word document  (Maps click to open).  Their modelling assessed the potential for reducing flooding levels under a range of possible scenarios including reducing water levels in the reservoirs, altering the confluence of the River Chew and Winford Brook and removing the bridge on the B3130. The modelling results indicate that such actions would have not reduced the 2012 flooding sufficiently to have prevented property flooding.

2 June 2014 The Department for Environment Food and Rural Affairs (DEFRA) has published (pdf attached click to open) 'Best Practice in Property Level Protection Systems - Advice for Local Authorities.' This gives advice on the best practice to follow when procuring and installing property level protection systems. The best practice is based on evaluation work carried out by JBA Consulting.  JBA Consulting also prepared the major reports into the 2012 Chew Magna and Chew Stoke floods, and are also managing the current Chew Magna project to enhance property level protection.

3 April 2014  Flood Warnings - notes on a meeting held with the Environment Agency  on 28th March attached (Word doc - click to open).  The meeting was called to consider how Flood Warning forecasting can be improved.

11 March 2014 Co-Chairs Rachel Wilson and Mike Curtis submitted questions for response by B&NES Planning, Transport & Environment Scrutiny Panel meeting on 4 March 2014.  These questions covered issues such as outstanding matters concerning UK Flood Barriers, how the £200,000 alocation for Chew Magna PLP will be disbursed, and the proposed Strategic Flood Risk Management Group.  The full list of questions asked, and the Scrutiny Panel response, is attached here (Word doc click to open).

1 February 201
CVFF Co-Chair Mike Curtis exchanged emails in early January with Bristol Water requesting action to reduce the water level of the Chew Valley Reservoir, because of the risk associated with high rainfall coupled with a full lake. The text of these emails is attached modelling Lake level reduction request 06 01 20 , Word doc click to open).  Subsequently Mike exchanged emails with Ed Lockington and Joby Graham (Environment Agency), and this correspondence together with Mike's comments and update is attached (Lake level reduction iss Jan 2014. Word doc click to open).

24 January 2014  Chew Valley Reservoir levels and drain off matters.
Attached are two pieces of correspondence between the Flood Forum and Martin Berry of Bristol Water relating to the issues around active management of water levels. 1) Martin (Word doc, click to open), and 2) BW Response to 22 Oct questions (pdf, click to open.)

4 December Responses to questions raised by Chew Magna Flood Forum (pdf, click to open) Response from B&NES, Bristol Water and the Environment Agency to the questions raised at the Flood Forum meeting on 1 October and also at the Public Meeting on 8 October.

28 November 2013  Report (click to open) on the meeting (attended by the Co-Chairs of the Flood Forum) of the B&NES Planning, Transport and Environment Scrutiny Panel on 20 November to discuss progress. Also, the Response from B&NES (click to open) to the questions which the Flood Forum sent to B&NES before the Public Meeting on 8 October.

23 November 2013  Bristol Water have prepared for the Flood Forum a Technical note (click to open) on the operation, capacity and management of the Chew Magna Reservoir.

B&NES has published (20 September 2013) the four reports from JBA Consulting into the 2012 floods and the performance of the property level protections installed in 2010-11. B&NES together with the EA and Bristol Water has also issued a briefing paper covering Chew Magna, with one covering Chew Stoke to follow shortly.) Click on the links to the briefing and all reports below:

- Briefing paper Chew Magna Flooding - September update : Chew Magna Flooding - September update pdf (click to open). The briefing also includes links to the following four reports, but links are indivually provided below.
- Briefing paper Chew Stoke - What we have been doing pdf (click to open) also includes the links.

- JBA Consulting  Chew Magna Flood Investigation. Final Report 2011-12 pdf (click to open)
- JBA Consulting - Chew Magna Flood Investigation. Technical Report  pdf  (click to open)
- JBA Consulting - Chew Magna Property Level Protection Scheme Evaluation Final Report  pdf (click to open)
- JBA Consulting - Chew Stoke Flood Investigation. Final Report 2011-2012 pdf (click to open)