Man Trunk UIDs & Eccles WwTW CEO Briefing 22 nd April 2013 - PowerPoint PPT Presentation

Man Trunk UIDs & Eccles WwTW CEO Briefing 22 nd April 2013

Background and Purpose The briefing provided at UU CIC on 5 th April 13 (Darren Hill/David Baines) updated the committee on the land access and ownership issues in relation to delivery of the UID schemes on and associated with Eccles WwTW (and the associated hydraulic flooding scheme). Specifically the briefing centred on: • the need to enter into Compulsory Purchase proceedings for the right to discharge into the Manchester Ship Canal • the revised legal advice on tactics provided shortly prior to the briefing that recommended expansion of the scope of CPO • the effect the CPO process would have on our ability to meet the regulatory commitment date A number of actions were agreed, including an offline briefing for the CEO to consider: • Our options to avoid the need for a new discharge into the Manchester Ship Canal and • Our options to close Eccles WwTW This briefing pack intends to address both of these actions.

Agenda • Introduction and purpose of the briefing • Actions arising from UU CIC 5th April 13 • Recap of current arrangement at Eccles and investment needs • Recap regulatory commitments • Review and discussion of options to meet needs • Summary of position in relation to disposal of any potential residual land at Eccles WwTW • Summary • Actions, next steps and feedback

5 th April UU CIC actions 1. Project team to provide Steve Mogford with a further briefing to present alternative options to preferred option 2. Steve Mogford to arrange meeting with Steve Moore from EA 3. Continue with the process for Compulsory Purchase (on-going process: open letter to be sent to Peel Holdings w/c 22 nd April) NB: Since the 5 th April UU CIC meeting, Russell Gettell (EA) has been notified in the form of verbal discussion and a short briefing note of the significant issues associated with delivery of the outputs associated with this project in advance of any meeting between UU and EA Senior Leadership

Current Arrangements & Needs Peel Green Rd 25 no. DG5 properties close to Eccles WwTW M60 J11 Roundabout A57 Liverpool Road SAL 0018 UID Eccles WwTW Located underneath M60 WFD Eccles WwTW Discharges unscreened flows Tightening of NH4 Inlet UID and to Salteye Brook. standard for Salteye M60 / Barton Bridge Peel Green Road Storm Tanks Brook Storm overflow at work inlet (screen solution) and Storm Tank imps Salteye Brook Existing Eccles WwTW outfall Eccles WwTW UU Land Ownership Peel Land Ownership Barton Manchester Ship Canal Locks Davyhulme WwTW

Regulatory Commitments There are 4 EA commitments associated with the works and one hydraulic flooding scheme that we are able to deliver as a ‘catchment solution’ as a result of the changes we make at the WwTW UID Regulatory Forecast Delivery Name/Title Reference Commitment (EA) Date SAL0018 Winton Outfall 28 Feb 2015 27 Feb 2015 016940144ST Eccles WwTW Storm Tanks 28 Feb 2015 27 Feb 2015 016940144SO Eccles WwTW Inlet Overflow 28 Feb 2015 27 Feb 2015 016940144 Eccles WwTW Final Effluent 28 Feb 2015 27 Feb 2015 DG5 Peel Green Rd DG5 31 Mar 2015 27 Feb 2015 Note: the forecast delivery dates shown in table above refer to current preferred option and assumes no delay in managing Peel Holdings

Options Considered 1. New gravity outfall into Manchester Ship Canal (MSC) 2. New pumped outfall into MSC 3. Retention of existing outfall into Salteye Brook 4. Transfer Eccles WwTW Flow To Works (FTW) to Davyhulme WwTW and retain use of existing discharge point into Salteye Brook for SAL 0018 and Inlet Overflow (includes the ‘closure’ of Eccles WwTW) 5. Transfer Inlet Overflow and Flow To Works (FTW) to Davyhulme WwTW and retain use of existing discharge point into Salteye Brook for SAL 0018 (includes the ‘closure’ of Eccles WwTW) 6. Maintain the discharge into Salteye Brook but move outfall to the confluence of MSC

1. New gravity outfall into Manchester Ship Canal (MSC) [ current preferred] 1. New gravity outfall into MSC downstream of Barton Locks Capex LBE: £35.5m Scope and Solution: • SAL 0018 : intercept existing sewer overflow , construct new CSO and screen – Construct two shafts and tunnel beneath M60 J11 (95m 2.1m id) – Tunnel into Eccles WwTW into new shaft (505m 2.87m id) • Eccles WwTW Inlet overflow : install two powered screens on existing overflow weirs • Eccles WwTW Inlet overflow, Storm Tanks and Final Effluent : convey all flows into new shaft and tunnel (1300m 2.87m id) beneath Barton Bridge across Peel land to new outfall into MSC • Peel Green Rd DG5 : isolate 25 properties from existing sewer and form new connections into new pumping station/rising main. Sewer upsizing in Peel Green Rd

1. New gravity outfall into Manchester Ship Canal [ current preferred] Peel Green Rd Disconnect from existing sewer and install new Pump Station and rising M60 J11 Roundabout main A57 Liverpool Road SAL 0018 UID Eccles WwTW Tunnel under motorway to WFD Eccles WwTW convey flows to Eccles Transfer of discharge to Inlet UID and WwTW. MSC removes need for M60 / Barton Bridge Peel Green Road Storm Tanks new Permit (dilution effect) New storm screens and overflow into new outfall Salteye Brook Divert existing outfall to Eccles WwTW facilitate Peel development New gravity outfall into MSC UU Land Ownership Peel Land Ownership Barton Manchester Ship Canal Locks Davyhulme WwTW

2. New pumped outfall into MSC 2. New pumped outfall into MSC adjacent to Eccles WwTW Capex LBE: £38.0m Scope and Solution : • SAL 0018 : intercept existing sewer overflow , construct new CSO and screen – Construct two shafts and tunnel beneath M60 J11 (95m 2.1m id) – Tunnel into Eccles WwTW into new shaft (505m 2.87m id) • Eccles WwTW Inlet overflow : install two powered screens on existing overflow weirs • Eccles WwTW Inlet overflow, Storm Tanks and Final Effluent : convey all flows into new pumping station to pump all flows into new outfall into MSC • Peel Green Rd DG5 : isolate 25 properties from existing sewer and form new connections into new pumping station/rising main. Sewer upsizing in Peel Green Rd

2. New pumped outfall into MSC Peel Green Rd Disconnect from existing sewer and install new Pump Station and rising M60 J11 Roundabout main A57 Liverpool Road SAL 0018 UID Eccles WwTW Tunnel under motorway to WFD Eccles WwTW convey flows to Eccles Transfer of discharge to Inlet UID and WwTW. MSC removes need for M60 / Barton Bridge Peel Green Road Storm Tanks new Permit (dilution New storm screens and effect) overflow into new outfall Salteye Divert existing outfall to Brook facilitate Peel development and retain long term as Eccles WwTW Pump Station Emergency Station Pump Overflow New pumped outfall into MSC UU Land Ownership Peel Land Ownership Barton Manchester Ship Canal Locks Davyhulme WwTW

3. Retention of existing outfall into Salteye Brook 3. Preserve Discharge into Salteye Brook, no new outfall into MSC, meaning we treat at Eccles to the tighter Ammonia standard (i.e. BAFF Plant and storage at Eccles WwTW) Capex LBE: £79.5m Scope and Solution : • SAL 0018 : intercept existing sewer overflow , construct new CSO and screen – Construct two shafts and tunnel beneath M60 J11 (95m 2.1m id) – Tunnel into Eccles WwTW (505m 2.87m id) • Eccles WwTW Inlet Overflow : New CSO chamber complete with Escalator Screens • Eccles WwTW Storm Tanks : Construct additional storage volume 32,800 m3 • Eccles WwTW Final Effluent : New BAFF plant • Peel Green Rd DG5 – construct 11,000 m3 storage Note: The permit limit for Eccles is likely to tighten even further if we remain in Salteye Brook due to non compliance with WFD. In future AMP periods we are likely to get a BOD limit of 7/8mg/l, an ammonia limit of 1mg/l and a tight P limit

3. Retention of existing outfall into Salteye Brook Peel Green Rd Disconnect from existing sewer and install new Pump Station and rising M60 J11 Roundabout main A57 Liverpool Road SAL 0018 UID Eccles WwTW Tunnel under motorway to WFD Eccles WwTW convey flows to Eccles New BAFF plant to meet Inlet UID and WwTW. new NH4 standard M60 / Barton Bridge Peel Green Road Storm Tanks New storm screens and additional storage New Salteye Brook Storm Storage New BAFF Plant Existing Eccles WwTW outfall Eccles WwTW UU Land Ownership Peel Land Ownership Barton Manchester Ship Canal Locks Davyhulme WwTW

4. Transfer Eccles WwTW FTW to Davyhulme (retaining use of existing discharge into Salteye Brook and ‘closing’ Eccles WwTW ) 4. Closure and transfer of substantial part of existing Eccles WwTW to Davyhulme WwTW (sub-option 1) Capex LBE: £176.7m Scope and Solution: • SAL 0018 : intercept existing sewer overflow , construct new CSO and screen – Construct two shafts and tunnel beneath M60 J11 (95m 2.1m id) – Tunnel into Eccles WwTW (505m 2.87m id) • Eccles WwTW Inlet Overflow : New CSO chamber complete with Escalator Screens • Eccles WwTW Storm Tanks : Construct additional storage volume 32,800 m3 • Eccles WwTW Storm Tanks and Final Effluent: – Transfer of FTW to new treatment facility including storm tanks sited within UU land adjacent to Davyhulme WwTW – Flow to Full Treatment (FtFT) is 1,035 l/s. New shaft at Eccles WwTW and tunnel beneath MSC – New pumping station at new treatment facility to lift FTW flows (2,138 l/s) from tunnel for treatment at ground level • New outfall into MSC on south bank, downstream of Barton Locks • Peel Green Rd DG5: 11,000 m3 storage