SST04 – Cloudburst Tunnel & Structures Project (Denmark)
Tender Reference: https://ted.europa.eu/en/notice/-/detail/836460-2025
TED Notice: Prior Information Notice (PIN)
Notice Type: Prior Information Notice
Procedure: Restricted procedure
Contract Type: Works
CONTRACTING AUTHORITY
Client:
HOFOR Spildevand København A/S (lead)
Novafos Spildevand Gladsaxe A/S
Novafos Spildevand Gentofte A/S
Activity: Urban wastewater and stormwater management
Location: Copenhagen, Gentofte, Gladsaxe and Frederiksberg, Denmark
PROJECT DESCRIPTION
The SST04 Cloudburst Tunnel forms a central element of Greater Copenhagen’s long‑term climate adaptation strategy. The project will divert excess stormwater and combined sewer flows into a new deep tunnel system, reducing flood risk in densely populated districts during extreme rainfall events.
The scheme includes:
Diversion of surplus stormwater from four municipalities into a new cloudburst tunnel
Temporary underground storage when tunnel capacity allows
Pumping of stored water to the Lynetten wastewater treatment plant via a new discharge pipeline
Controlled emergency overflow to the Øresund via a new outfall at Fiskerihavnen/Skudehavnen during extreme events
The works will be executed predominantly in dense urban areas with limited space, heavy traffic and complex stakeholder interfaces.
CONTRACT DETAILS
Lot: Single works contract
Internal Reference: SST04 – Tunnel & Structures
Main CPV Code: 45221240 – Construction work for tunnels
Estimated Contract Value: approx. DKK 2.0 billion (≈ €270 million)
Estimated Start Date: To be confirmed with tender launch
Estimated Completion: To be confirmed
Maximum Renewals: 0
LOCATION
Cities: Copenhagen, Gentofte, Gladsaxe, Frederiksberg
Country: Denmark
PROCUREMENT INFORMATION
Legal Basis: EU Utilities Directive
EU Funding: Not EU‑funded
GPA Coverage: Yes
Framework Agreement: No
Dynamic Purchasing System: No
Electronic Auction: No
SME Suitability: No
Investment Screening:
The contract is classified as critical infrastructure.
Non‑EU/EFTA contractors or owners must obtain approval from the Danish Business Authority.
SELECTION CRITERIA (Mandatory and Weighted)
Financial Requirements:
• Minimum average annual turnover: DKK 4 billion (last 3 years)
• Minimum average solvency ratio: 25%
• Positive average profit margin (last 3 years)
Technical Requirements:
• Up to 10 reference projects covering 12 technical categories (A–F)
• References may be up to 10 years old due to limited comparable mega‑projects
Mandatory Competencies:
• Segmental tunnel construction (with design responsibility)
• Pipe jacking (with design responsibility)
• CSM‑regulated railway crossings (CSM‑RA compliant)
• Deep shafts using diaphragm walls or secant pile walls (≥1000 mm, ≥15 m depth)
• Complex utility diversions in high‑traffic corridors
• In‑situ concrete works for shafts and pumping stations
• Experience in comparable ground conditions
• Full lifecycle project management from award to handover
AWARD CRITERIA
(To be confirmed at tender launch; expected to include:)
• Technical quality
• Methodology and construction planning
• Organisation and key personnel
• Price
SUBMISSION DETAILS
Submission Method: Electronic (details to be provided in formal tender)
Submission Language: Expected to be Danish or English
Deadline for Receipt of Tenders: Early 2026 (exact date to follow)
Tender Validity: 9 months, with possible extensions linked to foreign subsidy or investment screening processes
Variants: To be confirmed
Multiple Tenders: To be confirmed
Financial Guarantees: To be defined in tender documents
REVIEW & APPEALS
Review procedures will follow Danish public procurement rules.
Details will be provided in the formal tender documentation.
CONTACTS
Contracting Authority:
HOFOR Spildevand København A/S
Copenhagen, Denmark
Additional Authorities:
Novafos Spildevand Gladsaxe A/S
Novafos Spildevand Gentofte A/S
Further information will be published with the full tender in early 2026.
