ARA Gulfia, Gemeinde Klosters - Umbau Biologie zu SBR: Ausschreibung Generalplaner

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Location: Canton GR
Procuring office: Gemeinde Klosters

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Awarded

According to the simap publication. Values that are not given are deliberately missing here.

Awarded to

As published on simap.ch: winner and price (with or without VAT, as stated).

Award of 31.03.20264 bids
- TBF + Partner AG, ZürichCHF 551’147.85 incl. VAT

Awards of this contracting authority

Justification

Vorteilhafteste Angebot gemäss den Zuschlagskriterien

AI summary

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In brief
Services
Requirements
Conditions
Dates
Award criteria

An example of the structure without content: no summary is stored for this tender yet.

What is being procured?

Scope of work

Die Abwasserreinigungsanlage (ARA) Gulfia in der Gemeinde Klosters hat den Betrieb im Jahr 1975 aufgenommen. Die 2-strassige Biologie reinigt das Abwasser der Fraktionen Monbiel, Klosters und Madrisa.

Da die bestehende Infrastruktur des Beckenblocks sich dem Ende ihrer Lebensdauer nähert, wurde im Jahr 2023 eine Zukunftsstudie durchgeführt. Basierend darauf soll zukünftig das biologische Reinigungsverfahren von einer klassischen Belebschlammbiologie zu einem Sequencing Batch Reactor (SBR) umgerüstet werden. Die Planung wurde im Rahmen eines Vorprojektes vertieft. Das Ausbauziel wurde auf 12'000 EW und ein Qmax von 150 l/s festgelegt. Das Ausbauziel ist zu Beginn des Bauprojekt zu überprüfen.

Mit der vorliegenden Submission wird der Generalplaner für den Umbau der Biologie für die SIA-Phasen 32 (Bauprojekt) bis Phase 53 (Inbetriebnahme, Abschluss) ausgeschrieben.

Key facts, codes and options

Type of contract: Service
Procedure: Open procedure
Trades: Not evident from the available publication data.
CPV: CPV 90400000 – Sewage services
CPV 71300000 – Engineering services
Options: Not evident from the available publication data.
Variants: Not evident from the available publication data.
Partial offers: Not evident from the available publication data.

TEXFY assessment: Products, installations, quantities, technical specifications and exclusions are not structured fields of the publication. TEXFY does not analyse the free text on them: check the original text and the tender documents.

Market data for this service

From awards published on simap.ch, without rankings and without rating companies.

Comparable awards

Wastewater treatment plants, canton of Graubünden, last 12 months

3 awards, bids (median): 2.

Awards: Wastewater treatment plants

Range of award prices

Wastewater treatment plants, all of Switzerland, last 12 months

CHF 207’05110 % of the prices were lower

CHF 681’396Median: half were lower

CHF 5’676’86310 % of the prices were higher

8 out of 10 award prices were between CHF 207’051 and CHF 5’676’863.

From 178 published award prices in CHF from 13.11.2025 to 02.11.2026, with or without VAT, as published. A single contract can differ widely.

Official source

Go to the official tender

simap project number: 30211
Publication number: 30211-02
Covered by international agreements: Yes
TED (EU): Publication on ted.europa.eu (opens in a new tab)

Checked against simap: 10.11.2026, 18:02

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