RIVERBANK EROSION, BLACKTOFT CLOUGH, BLACKTOFT LANE, BLACKTOFT

 

We have been planning a short term repair that intended to last 3 or 4 years. We carried out an initial design of installing sheet piles and rock armour using ground investigation date we obtained from nearby sites. This previous date did indicate potential for a layer of peat, a poor strength material close to the site. We therefore made the decision to obtain additional ground investigation closer the Blacktoft Clough site so that it would aid in the design of the temporary repair. 

 

As per our last update on 11 November 2022 we confirmed that our contractor would be carrying out the ground investigation works at Blacktoft Clough on Wednesday 16 November 2022. However, due to poor weather and ground conditions the works did not actually go ahead until Monday 21 November 2022. The 15m deep borehole was drilled adjacent to the slip to get the ground conditions at the site. The blue lines were marked out by the Ouse and Humber IDB* to identify their culvert prior to us breaking ground. 

 

We received the draft results on Tuesday 11 November 2022 which have shown there is a 5.8m thick strata of peat directly below the embankment. This finding has now caused us to review the proposed design and consider alternative short term repair solutions. 

 

As previously stated, that subject to all going according to plan, we intended to be on site starting these works by mid to late November 2022. Unfortunately, due to the results of the recent ground investigation, any short term repairs are now unlikely to occur in this calendar year. 

 

 

We continue to monitor the defences using our CCTV cameras which are checked by our staff on a regular basis. Our contingency plan is in place and ready to be used in an emergency situation including the deployment of the dumpy bags. We can ask the IDB for assistance in deploying if required as they are located close to the site and we also have the option to air life the bags in place if required. 

 

As always we will continue to keep you updated with our progress. Please contact me directly should you have any questions or need any further information. Regards." 

 

 

Blacktoft Parish Council is in contact with the Environment Agency at all times and if anyone has the need for more information please do not hesitate in contacting Sue Nicholson, Clerk to Blacktoft Parish Council. 

 

* IDB - House and Humber Internal Drainage Board