ARA Hofen; Schlammentwässerungsanlage

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Location: Canton SG
Procuring office: Entsorgung St.Gallen

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Awarded

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Awarded to

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

Award of 18.11.20251 bid
- Kuster + Hager Ingenieurbüro AG St. Gallen, St. GallenCHF 869’438.05 incl. VAT

Awards of this contracting authority

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Services
Requirements
Conditions
Dates
Award criteria

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What is being procured?

Scope of work

Die Schlammabsetzung in der ARA Hofen in Wittenbach hat sich in den letzten Jahren verschlechtert, was zu betrieblichen Problemen führt. Zur Sicherung eines langfristig stabilen Betriebs der ARA Hofen ist der Bau einer neuen Schlammentwässerungsanlage vorgesehen.

Im Rahmen des Projekts wird eine neue Schlammentwässerungsanlage mit Schlammbehältern und sämtlichen erforderlichen Installationen und Aggregaten erstellt. Der Neubau wird sowohl in die technische Infrastruktur als auch in die Prozessabläufe der bestehenden ARA integriert.

2023 wurde in einer Vorstudie die Bestvariante zur Schlammeindickung und -entwässerung auf der ARA Hofen ermittelt. Auf Basis dieser Vorstudie wurde 2024 ein erweitertes Vorprojekt für die Schlammentwässerungsanlage erarbeitet.

Am 29. April 2025 hat das Stadtparlament das Projekt in Höhe von rund 8,3 Mio. CHF (exkl. MWST) genehmigt und den auf die Stadt St. Gallen entfallenden Kostenanteil von 6’879’222 CHF (exkl. MWST) bewilligt.

Mit diesen Grundlagen wird mit der vorliegenden Submission der Generalplaner für die Planung und die Realisierung der Schlammentwässerungsanlage ermittelt.

Key facts, codes and options

Type of contract: Service
Procedure: Open procedure
Trades: eBKP-T V 1.5 – Lead designer, design consortium
CPV: CPV 71320000 – Engineering design services
CPV 71240000 – Architectural, engineering and planning services
CPV 90420000 – Sewage treatment services
CPV 90492000 – Sewage treatment consultancy 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 St. Gallen, last 12 months

8 awards, bids (median): 2.5.

Awards: Wastewater treatment plants

Range of award prices

Wastewater treatment plants, all of Switzerland, last 12 months

CHF 208’19110 % of the prices were lower

CHF 672’693Median: half were lower

CHF 5’663’63510 % of the prices were higher

8 out of 10 award prices were between CHF 208’191 and CHF 5’663’635.

From 179 published award prices in CHF from 13.11.2025 to 05.11.2026, with or without VAT, as published. A single contract can differ widely.

Official source

Go to the official tender

simap project number: 23101
Publication number: 23101-02
Covered by international agreements: No

Checked against simap: 11.11.2026, 08:08

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More in the guide

Award, reasons and appeal

Contract awards in St. Gallen: monthly reports

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