Update from Severn Trent on Project at Sterndale Moor


Please see below for a project update:

Summary of recent work undertaken:

·         CCTV Survey of all shared sewers was carried out for three days between 13 September 2016 and 15th September 2016 – High success rate – approximately 90% of total length successfully surveyed in full.

·         Vac-Jetter recycling unit used on 15 September 2016,  over 9 hrs on site,  to clear blocked sewer lengths caused by solid ragging, tree roots, sewer defects and half a house brick removed to enable second pre-cleansed CCTV Survey to be completed. Awaiting DVD and full survey report from contractor.

·         Summary of Blocked sewers:  

1.        Sewer cleansed between No. 2-13 Sterndale Moor at rear of properties (flat, localised reverse gradient/backfall).

2.       Blocked sewer Rear of Nos. 20-28  jetted clear, caused by obstruction (solid rags) in inspection chamber rear of No. 28 Sterndale Moor.

3.       30% Tree root mass  removed from sewer approx. 7 metres downstream of MH adjacent to garage at rear of No. 20 Sterndale Moor.

4.       Silt blockage removed / half brick removed from sewer in road between 2 no. buried manholes just upstream of  broken pipe  / pipe invert in sewer outside No. 42 Sterndale Moor.  Broken pipe invert and buried manholes prevented full completion of CCTV Survey.

5.       Blockage removed from damaged sewer upstream of Septic tank (Rear of Nos. 44/46 Sterndale Moor)

6.       Unable to CCTV Survey drain between Sports Pavilion and No. 15 Sterndale Moor due to blockages/debris in pipe.

·         Ecological desktop study and walk-over survey at Sterndale Moor,  undertaken by RPS, Ecological Consultants on 13 September 2016.

·         Geo-technical desktop Study undertaken by Nicholls Colton and received on 19 September 2016.

·         STW Meeting with Paul Chambers – Environment Agency (EA) on 24 August 2016 to discuss existing works consent, EA requirements, advise for residents regarding their connection options and investigations if local waste water treatment site at Sterndale Moor was chosen as an Option.

·         Meeting with Severn Trent Water Non-Infra to discuss merits of localised new treatment facility at Sterndale Moor and update on potential spare capacity at Chelmorton Waste Water Treatment Works.

Following these meetings and further site surveys,  Severn Trent Water will over the next few weeks, need to evaluate the Option of treating locally at Sterndale Moor against a second option of laying a gravity sewer to Chelmorton Waste Water Treatment Works.

This evaluation will be in respect of whole –life cost (Capital Costs and Future Operational Costs), including maintenance, risk of planning delay and  refusal, construction risks, risks to underground aquifers and EA Approval.

There will also be localised sewer replacement, remedial work to some manholes and possible relining work on the existing sewerage system in Sterndale Moor, included in either option.

Some further CCTV /Cleansing will be undertaken in  November 2016  to survey the blocked sports pavilion connection and sewers upstream of  Chelmorton Waste Water Treatment Works.

Further information and updates will follow in due course and we plan to hold a meeting with High Peak BC , Hartington Upper Quarter Parish Council and local Councillors in advance of any public meeting.  We need to decide where to hold this meeting? Could it be held at the committee hall in Sterndale Moor or can a room be booked at the Buxton Council Offices again?

We propose to hold a public meeting / exhibition with local residents when the preferred option has been established, hopefully before mid December 2016. Ideally this meeting needs be held locally so it is a walkable distance from affected properties. Would it be possible to use the existing Sterndale committee hall? We tend to schedule these meetings between 2pm and 7:30pm to try and catch as many people as possible.

Best regards

Graham Robinson

Senior Programme Engineer

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