Land Adjacent to Hinksford Substation
There is no flood risk at the Hinksford Mobile Home Park. Appendix D of the Flood Risk Assessment and Drainage Strategy shows that all surface water (i.e., rain) is captured within the designed system (extract below). The drainage system works by lining the development compound areas with an impermeable layer, to stop any water draining into the ground. Surface water is collected via a series of pipes, which then drain into an underground tank beneath the emergency access track. The water is then conveyed into an attenuation basin, which stores the water before discharging it at a controlled rate into a ditch, which will then flow into Holbeche Brook. The drainage system includes filters to ensure any water released in a rainfall event is suitable.
The attenuation basin has been sized to store water for rainfall events plus allowance for 40% climate change. This makes sure that even during extreme rainfall events, water will still be stored within the drainage system to ensure there won’t be an impact on flooding.
Our cottage is prone to flooding, the proposed reservoir overflow will fall out into Smestow brook. This will increase the chance of our property flooding this will occur more than once in ten years.
There is no reservoir on site. The ‘blue’ feature which can be seen on the layout plan is an attenuation basin. This is a drainage feature used to store water, and therefore slow down the rate of surface water discharging from site in rainfall events.
Lithium iron phosphate (LFP) – we have not selected the battery supplier yet as that happens during the detailed design and the tendering process following a successful decision at planning.
However, the BESS suppliers we engage with are all using LFP battery chemistry due to high thermal stability.
There will be lighting around the perimeter of the development compounds. However, because the battery storage facility is operated remotely, there is no requirement for the site to be permanently lit. Instead, the lighting is motion-sensor activated and will only be triggered during periods of routine maintenance. Additionally, the lighting is designed to be downward facing to reduce light spill leaving the site.
An unredacted report was sent to the council and this version is reviewed by the Ecology Officer.
The Council chooses to redact the report prior to uploading it on the planning portal, where it can be viewed in the public domain. This is because Ecology reports contain sensitive information relating to protected species. All records must remain confidential to ensure that any locations of a particular species are removed from the document.
The drainage strategy has been designed to have an underground tank beneath the emergency access track. This tank will store water during rainfall events and therefore act as the supply for the required volume of water supply (as per NFCC guidance) to use, should emergency services which to use it.
Because the water is sourced from rainwater, the tank will constantly be replenished with fresh water, to ensure there is no stagnation within the tank.
The tank has been sized to hold 228m3 of fire suppression water. This volume is in accordance with the NFCC guidance which requires that fire suppression water totalling 1,900 litres per minute for at least 2 hours can be provided on site.
In order to ensure no runoff escapes into the ground or surrounding environment during an emergency event, the development compounds will be lined with an impermeable membrane. As mentioned in the answer to question 11, the water in the underground tank is used as suppression water by the emergency services. If utilised, there is a penstock which will close at the end of the tank to stop any water exiting the drainage system and into Holbeche Brook. At the end of the event, the contaminated water will be held in the tank, which will be removed from the site from wastewater vehicles and safely disposed of.