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United Kingdom-Reading: Sewage-treatment plant construction work
Contract notice – utilities
Section I: Contracting entity
Main address: www.thameswater.co.uk
Section II: Object
Mogden STW AMP 7 Resilience
Design, construct and commission resilience works to the current Mogden Sewage Treatment Works (STW) with the scope summarised as follows:
• improve the capacity of preliminary treatment;
• improve the resilience and capacity of primary and secondary treatment;
• improve the resilience of the Sludge and Digester Streams and prepare them for AMP8 work;
• provide additional onsite energy generation;
• enable the works to meet its flow and quality consent for population growth.
Contract award is expected to be May 2021 and the project is required to be complete by March 2025, unless the Options for AMP 8 works are instructed.
The contractor will be required to carry out the works without adversely impacting on the integrity of the STW and in accordance with the current permits.
Mogden Sewage Treatment Works (STW) is the second largest STW in the Thames region and the country. Its catchment area in the west of London stretches from Chiswick to the north and west of Heathrow Airport.
The design flow to full treatment capacity is 1 064 Mld. The works which are the subject matter of this contract opportunity are to provide for growth, resilience and consent compliance to a design horizon of 2 036 with the population equivalent (PE) projected to be 2.4 million; the contract will also include related planning, design and engineering services.
The scope of this project comprises the following activities:
Upgrades to the inlet pumping station and preliminary treatment to provide capacity, resilience and protection to downstream processes, including:
• high voltage (HV) and low voltage (LV) electrical infrastructure;
• additional screenings capacity on the East side;
• improved grit distribution and capacity on the west side.
Capital maintenance improvement works on the East Side Primary Settlement Tanks (PSTs) 1-8.
Capital maintenance work and improved process control, to increase the resilience of the activated sludge plants (ASPs) including:
• C battery blower replacement and ASP works including RAS system improvements;
• D battery blower replacement;
• E battery blower power supply;
• remove flow restriction on North Final Settlement Tanks (FSTs) on Batteries A&B.
New sludge treatment facilities to increase capacity, improve asset reliability and provide resilience. This includes:
• additional thickened sludge blending tank with odour control;
• new raw sludge thickening streams including thickeners and strain presses with the associated pumps and polymer system;
• modifications to the sludge import facility to improve the throughput of the sludge stream;
• digester modifications including capital maintenance work on mixing systems, replacement of roofs and preparatory works for a future sludge scheme by enabling sequential primary digestion;
• replace the existing gas forwarding compressors and installation of a fourth Combined Heat and Power (CHP) engine;
• capital maintenance works to replacement or upgrade existing HV and LV Switchboards;
• modifications to the power management system and upgrade of the site SCADA (supervisory control and data acquisition) system
Other works to upgrade the capacity of the existing systems for the 2036 growth scenario.
The contractor shall also be responsible for submitting the application for planning consent, if required.
As stated in procurement documents.
Please refer to the project brief.
Section III: Legal, economic, financial and technical information
As detailed in the procurement documents.
Bonds and/or parent company guarantees of performance and financial standing may be required.
Please refer to the procurement documents
Consortia may be required to form a legal entity prior to award.
Please refer to the procurement documents.
Section IV: Procedure
Section VI: Complementary information
Anticipated duration of the project is 46 months.
Sections of the project will be required to be delivered at specific milestones within the 46 months.
The figure stated in Section II.1.5) and Section II.2.6) is the current estimated maximum value of the contract. Thames Water considers that the value of this project is estimated to be in the range of GBP 60 m — GBP 70 m.
Organisations wishing to express an interest in this contract opportunity must complete and submit a pre-qualification questionnaire (PQQ) response by the date specified in Section IV.2.2). A pack of procurement documents (including the PQQ instructions and questionnaire) is available by using the link in Section I.3 of this notice, i.e. https://www.thameswater.co.uk/procurement
We will be holding a webinar to help applicants understand technical aspects of our requirements. This will be held at 10 am on 16 June 2020. Organisations expressing an interest in this project and requesting a pre-qualification questionnaire using the web link in Section 1.3 of this notice will be sent a link for the webinar. By participating in this webinar you agree to it being recorded and shared with other interested parties. If you are unable to take part in the webinar then the recording will be made available.
The ITN process is being conducted in two stages with the initial 4 tenderers reducing to 2 for the second stage.
Thames Water reserves the right to change any aspect of or terminate this procurement and/or consider alternative procurement options. Under no circumstances shall Thames Water incur any liability (costs or otherwise) arising from an organisation expressing an interest in, preparing responses to and/or participating in this procurement.
Note that your client may be Thames Water Utilities Ltd or another company within the Kemble Water group structure.
Thames Water Utilities Ltd will incorporate a standstill period at the point information on the award of the contract is communicated to tenderers. That notification will provide full information on the award decision. The standstill period, which will be for a minimum of 10 calendar days, provides time for unsuccessful tenderers to challenge the award decision before the contract is entered into.
The Utilities Contracts Regulations 2016 provide for aggrieved parties who have been harmed or are at risk of harm by a breach of the rules to take action in the High Court (England, Wales and Northern Ireland).