Transformation eines bestehenden Wärmenetzsystems - Voltastraße in Mönchengladbach

The contract timeline includes a planned contract start date and several key milestones and phases.

Contract start date:

• The planned contract start date, also referred to as the contract award date (Zuschlagserteilung), is December 22, 2026.

End date:

• The binding period for offers ends on February 28, 2027.
• No explicit contract end date is stated.

Total duration:

• Not explicitly stated.

Key milestones/phases:

• Overall Process Milestones (Vergabeverfahren):
• Call for tenders (after conclusion of participation competition): November 5, 2026.
• Answering bidder questions regarding the procurement process and tender documents: November 5, 2026 - November 16, 2026.
• Submission deadline for initial offers: November 17, 2026, 10:00 AM.
• Evaluation of offers: November 18, 2026.
• Negotiation round: 48th/49th calendar week.
• Request for submission of final binding offers: December 3, 2026.
• Submission deadline for final binding offers: December 11, 2026, 10:00 AM.
• Evaluation of final binding offers: December 11, 2026.
• Preliminary information to unsuccessful bidders according to § 134 GWB: December 11, 2026.
• Contract award / Planned contract start: December 22, 2026.
• Contractual Phases (Leistungsphasen):
• Stufe 1 (Leistungsphase 2 - Preliminary Design): Within 6 weeks after contract award.
• Stufe 2 (Leistungsphase 3 - Draft Design): Within 8 weeks after the call-off of Stufe 2 (or completion of Leistungsphase 2).
• Stufe 3 (Leistungsphase 4 - Approval Planning): Within 4 weeks after the call-off of Stufe 3 (or completion of Leistungsphase 3).
• The contractor is required to submit a detailed schedule, broken down into planning and execution phases, within 3 weeks of being requested by the client. This schedule becomes binding upon the client's approval.

The core scope of work for this tender involves planning services for the transformation of an existing heating network system on Voltastraße in Mönchengladbach. The primary objective is to update, deepen, and convert an existing transformation plan into an implementable, approvable, and tender-ready specialized plan. This work is to be performed in accordance with service phases 2 to 4 of the HOAI (German Fee Schedule for Architects and Engineers), specifically preliminary planning, draft planning, and approval planning.

The ultimate goal is to develop a technically, economically, and ecologically aligned preferred variant with sufficient detail to facilitate approval procedures and the creation of tender documents for the subsequent implementation. All planning must fully comply with the requirements of the Federal Funding for Efficient Heating Networks (BEW). A fundamental re-evaluation of new variants is not part of the scope; instead, existing solution approaches from the transformation plan are to be reviewed, concretized, and further developed.

Key deliverables and activities include:

• Preliminary Planning (Leistungsphase 2): Analysis and technical assessment of the existing transformation plan, including plausibility checks of underlying conditions, updating data, and coordinating with the client. This also involves investigating and evaluating alternative supply concepts for the heating network, considering different temperature levels, network structures, and generation concepts, followed by a technical-economic comparison. Rough dimensioning of essential system components (heat generators, network, storage, house connection stations, MSR) and a preliminary economic assessment of investment and operating costs for the variants are required, leading to the selection of a preferred variant.
• Draft Planning (Leistungsphase 3): Detailed technical elaboration of the preferred variant into a coordinated overall system, including detailed dimensioning of heat generation plants (type, number, energy source, power, heat injection amount, temperature, key performance indicators). Detailed dimensioning of the heating network and hydraulics, including pipe types, lengths, diameters, insulation conductivity, pumps, fittings, pressure maintenance systems, and leakage monitoring. This also involves network and pressure loss calculations and a consistent, implementable transformation path based on the preferred variant.
• Approval Planning (Leistungsphase 4): Identification of all necessary permits for the heating network, creation of all required approval documents, including plans, proofs, and calculations for the heating network and generation plants (including heat sources). Coordination with authorities and specialist agencies to clarify approval-relevant facts and incorporate requirements. Preparation of all planning content to be compliant with BEW requirements, including calculations and structured tabular overviews of heat generators, network elements, and system components with relevant technical parameters. Finally, a comprehensive final report describing the transformation concept, preferred variant, key technical and economic results, and the development path to greenhouse gas neutrality according to BEW guidelines must be provided.

All deliverables, including calculations, dimensioning, and assumptions, must be presented transparently, comprehensibly, and in a verifiable manner. Documents are to be submitted digitally in editable formats (e.g., Word, Excel, CAD) and as PDFs. Participation in project-related meetings with the client, specialist planners, authorities, network operators, and funding bodies is also required.