Thames Estuary Phase 1 Programme (TEP1)

The Thames Estuary 2100 Plan (TE2100 Plan), first published in 2012 and updated in 2023, is a strategic approach to managing tidal flood risk to communities and business in the Thames Estuary area due to rising sea levels. Over 1.42 million people and 586,000 homes worth £321 billion in London …

CPV: 45246400 Защитни речни съоръжения срещу наводнения
Място на изпълнение:
Thames Estuary Phase 1 Programme (TEP1)
Издаващ орган:
Environment Agency
Номер на наградата:
001

1. Buyer

1.1 Buyer

Official name : Environment Agency

2. Procedure

2.1 Procedure

Title : Thames Estuary Phase 1 Programme (TEP1)
Description : The Thames Estuary 2100 Plan (TE2100 Plan), first published in 2012 and updated in 2023, is a strategic approach to managing tidal flood risk to communities and business in the Thames Estuary area due to rising sea levels. Over 1.42 million people and 586,000 homes worth £321 billion in London and the wider estuary will benefit from the Plan. Thames Estuary Phase 1 (TEP1) was established to deliver the first 10 years of the TE2100 plan as an industry-leading programme following an adaptative pathways strategy. In the Plan, Option 1.4 calls for a strategic approach to asset management that optimises between maintenance, repair and replacement and incorporates adaptation for our changing climate and future sea level rise. The Environment Agency Sustainable Engineering Procurement Strategy (SEPS), approved by Defra and HM Treasury, identified TEP1 as a pathfinder contract for the Environment Agency working with a single delivery partner (CH2M Hill UK) to deliver a series of outcomes more efficiently than current arrangements i.e. via framework call-offs and various discrete Thames Estuary flood risk projects. The new integrated delivery team approach was approved due to the benefits it would bring in terms of optimised delivery, retention of expertise and competency at a programme-scale. The original TEP1 Full Business Case for the delivery of activities to support the first 10 years of the TE2100 Plan was approved by HM Treasury in September 2014.
Procedure identifier : 17cee46a-75fc-4ded-b75b-7910683df68d

2.1.1 Purpose

Main classification ( cpv ): 45246400 Flood-prevention works

2.1.4 General information

Legal basis :
Directive 2014/24/EU

5. Lot

5.1 Lot technical ID : LOT-0001

Title : TEP1 Contract
Description : The Thames Estuary 2100 Plan (TE2100 Plan), first published in 2012 and updated in 2023, is a strategic approach to managing tidal flood risk to communities and business in the Thames Estuary area due to rising sea levels. Over 1.42 million people and 586,000 homes worth £321 billion in London and the wider estuary will benefit from the Plan. Thames Estuary Phase 1 (TEP1) was established to deliver the first 10 years of the TE2100 plan as an industry-leading programme following an adaptative pathways strategy. In the Plan, Option 1.4 calls for a strategic approach to asset management that optimises between maintenance, repair and replacement and incorporates adaptation for our changing climate and future sea level rise. The Environment Agency Sustainable Engineering Procurement Strategy (SEPS), approved by Defra and HM Treasury, identified TEP1 as a pathfinder contract for the Environment Agency working with a single delivery partner (CH2M Hill UK) to deliver a series of outcomes more efficiently than current arrangements i.e. via framework call-offs and various discrete Thames Estuary flood risk projects. The new integrated delivery team approach was approved due to the benefits it would bring in terms of optimised delivery, retention of expertise and competency at a programme-scale. The TEP1 programme came to an end on 31 March 2025. The next multi-year delivery programme for the TE2100 Plan is currently under development and will utilise the knowledge and asset intelligence gained within TEP1 to inform its activities. The original TEP1 Full Business Case for the delivery of activities to support the first 10 years of the TE2100 Plan was approved by HM Treasury in September 2014 for £308m. During the 10-year period there to have been two principal changes to the original TEP1 contract that qualify as contractual modifications totalling £183,652,721. These can be summarised as 1) Inflation (£29,652,721) and 2) various Scope Modifications (£154,000,000).
Internal identifier : 001

5.1.1 Purpose

Main nature of the contract : Works
Additional nature of the contract : Services

5.1.16 Further information, mediation and review

Review organisation : Environment Agency

6. Results

6.1 Result lot ldentifier : LOT-0001

6.1.2 Information about winners

Winner :
Official name : CH2M HILL UNITED KINGDOM
Tender :
Tender identifier : 165-273641
Identifier of lot or group of lots : LOT-0001
Value of the tender : 183 652 721 Pound sterling
Contract information :
Identifier of the contract : EAAA-9AQJ45 TEP1-01 TEP1-02 TEP1-03 TEP1-04 TEP1-05
Date of the conclusion of the contract : 31/03/2025 31/03/2025 31/03/2025 31/03/2025 31/03/2025 31/03/2025

7. Modification

7.1 Modification

Identifier of the previous contract award notice : 310059-2013
Identifier of the modified contract : CON-0002
Reason for modification : Modifications based on review clauses or options.
Description : Within the TEP1 contract documents there is a provision that allows for the unit costs in the contract’s price list to be adjusted against pre-determined indices for inflation.

7.1.1 Change

Description of modifications : Rising inflation costs have contributed to greater expenditure against the original contract value adding an additional £29,652,721 to the contract value.

7.1 Modification

Identifier of the previous contract award notice : 310059-2013
Identifier of the modified contract : CON-0003
Reason for modification : Need for additional works, services or supplies by the original contractor.
Description : During the first seven years of delivery, the Environment Agency (EA) recognised that the strategic asset investment need was greater than the original value forecasted at Full Business Case (FBC) stage and as a result more work was required to deliver the objectives of the Thames Estuary 2100 Plan and FBC. Whilst the objectives of the programme were clear at FBC, the scope of works required to deliver these objectives was an estimate based on information known at the time about the fixed and active assets within the geographical extent of the Plan area.

7.1.1 Change

Description of modifications : During the first seven years of delivery of TEP1, the EA have advanced the asset intelligence within the Thames Estuary and their increased knowledge and understanding of assets in the Thames Estuary highlighting that the need differs from the original baseline. Consequently, there has been additional works by the original contractor totalling £85,540,776.

7.1 Modification

Identifier of the previous contract award notice : 310059-2013
Identifier of the modified contract : CON-0004
Reason for modification : Need for modifications because of circumstances which a diligent buyer could not predict.
Description : During the first seven years of delivery, the Environment Agency (EA) recognised that the strategic asset investment need was greater than the original value forecasted at Full Business Case (FBC) stage and as a result more work was required to deliver the objectives of the Thames Estuary 2100 Plan and FBC. Whilst the objectives of the programme were clear at FBC, the scope of works required to deliver these objectives was an estimate based on information known at the time about the fixed and active assets within the geographical extent of the Plan area.

7.1.1 Change

Description of modifications : During the first seven years of delivery of TEP1, the EA have advanced the asset intelligence within the Thames Estuary and their increased knowledge and understanding of assets in the Thames Estuary highlighting that the need differs from the original baseline. Consequently, there have been modifications that could not be predicated at time of contract totalling £18,269,963.

7.1 Modification

Identifier of the previous contract award notice : 310059-2013
Identifier of the modified contract : CON-0005
Reason for modification : Modifications that are not substantial.
Description : During the first seven years of delivery, the Environment Agency (EA) recognised that the strategic asset investment need was greater than the original value forecasted at Full Business Case (FBC) stage and as a result more work was required to deliver the objectives of the Thames Estuary 2100 Plan and FBC. Whilst the objectives of the programme were clear at FBC, the scope of works required to deliver these objectives was an estimate based on information known at the time about the fixed and active assets within the geographical extent of the Plan area.

7.1.1 Change

Description of modifications : During the first seven years of delivery of TEP1, the EA have advanced the asset intelligence within the Thames Estuary and their increased knowledge and understanding of assets in the Thames Estuary highlighting that the need differs from the original baseline. Consequently, there have been modifications determined to be not substantial totalling £44,235,943.

7.1 Modification

Identifier of the previous contract award notice : 310059-2013
Identifier of the modified contract : CON-0006
Reason for modification : Modifications under a minimal value ("de minimis").
Description : During the first seven years of delivery, the Environment Agency (EA) recognised that the strategic asset investment need was greater than the original value forecasted at Full Business Case (FBC) stage and as a result more work was required to deliver the objectives of the Thames Estuary 2100 Plan and FBC. Whilst the objectives of the programme were clear at FBC, the scope of works required to deliver these objectives was an estimate based on information known at the time about the fixed and active assets within the geographical extent of the Plan area.

7.1.1 Change

Description of modifications : During the first seven years of delivery of TEP1, the EA have advanced the asset intelligence within the Thames Estuary and their increased knowledge and understanding of assets in the Thames Estuary highlighting that the need differs from the original baseline. Consequently, the have been modifications determined to be de minimis totalling £5,953,326

8. Organisations

8.1 ORG-0001

Official name : Environment Agency
Registration number : 549300Q588PLLR442U24
Postal address : Horizon House Deanery Road
Town : Bristol
Postcode : BS1 5AH
Country : United Kingdom
Contact point : Department of Environment, Food and Rural Affairs
Telephone : 0370 850 6506
Roles of this organisation :
Buyer
Review organisation

8.1 ORG-0002

Official name : CH2M HILL UNITED KINGDOM
Registration number : 02533469
Town : London
Postcode : SE1 2QG
Country : United Kingdom
Roles of this organisation :
Tenderer
Winner of these lots : LOT-0001

8.1 ORG-0000

Official name : Publications Office of the European Union
Registration number : PUBL
Town : Luxembourg
Postcode : 2417
Country subdivision (NUTS) : Luxembourg ( LU000 )
Country : Luxembourg
Telephone : +352 29291
Internet address : https://op.europa.eu
Roles of this organisation :
TED eSender

Notice information

Notice identifier/version : b95e5c9d-5cf7-4b9c-b6a5-459c98535c9e - 01
Form type : Contract modification
Notice type : Contract modification notice
Notice dispatch date : 01/07/2025 06:55 +00:00
Languages in which this notice is officially available : English
Notice publication number : 00428505-2025
OJ S issue number : 124/2025
Publication date : 02/07/2025