Sanierung Stauwehr Winznau - Los 1.1: Baumeister Neubauten, Baumeisterarbeiten für den Bau des neuen Kraftwerksgebäudes, der Fischaufstiegsanlage, der Wehrbrücke, des Gebäudes für die Dammbalken und des Blocksteinsatzes

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Location: Canton SO
Procuring office: Alpiq Hydro Aare AG

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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 06.06.20253 bids
- STRABAG AG, SchlierenCHF 13’954’572.90 incl. VAT

Awards of this contracting authority

AI summary

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In brief
Services
Requirements
Conditions
Dates
Award criteria

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What is being procured?

Scope of work

Das Stauwehr Winznau bei Olten wurde 1914-1917 erbaut und gehört zum Laufwasserkraftwerk Gösgen (KWG) der Alpiq Hydro Aare AG (Bestellerin). Es leitet die Aare in den 4,8 km langen Oberwasserkanal zum Maschinenhaus in Niedergösgen, welches in den Jahren 1996-2000 neu gebaut wurde.

Das Stauwehr ist in seiner ursprünglichen, über 110-jährigen Bauart in einem guten, betriebsfähigen Zustand.

Im Rahmen der Neukonzessionierung sind u.a. Sanierungstätigkeiten am bestehenden Bauwerk (Stauwehr) sowie ein neues Dotierkraftwerk mit einer installierten Leistung von ca. 1.2 MW geplant.

Gegenstand des vorliegenden Vertrages bilden die Baumeisterleistungen für den Bau eines Dotierkraftwerks für die Restwassernutzung sowie die Konstruktion einer Fischaufstiegs- und Fischabstiegsanlage, den Bau einer neuen Wehrbrücke, den Bau des neuen Dammbalkenlagers und die Kolkschutzsanierung (Los 1.1).

Für weitere Details wird auf die Ausschreibungsunterlagen verwiesen.

Key facts, codes and options

Type of contract: Construction and installation
Type of construction: Civil engineering
Construction service: Execution
Procedure: Open procedure
Trades: OAG 4.2.1 – Energy production
CPV: CPV 45000000 – Construction workCPV general: general code without a field
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

Main construction works, canton of Solothurn, last 12 months

15 awards, bids (median): 4.

Awards: Main construction works

Range of award prices

Main construction works, canton of Solothurn, last 12 months

CHF 587’74510 % of the prices were lower

CHF 2’110’058Median: half were lower

CHF 14’592’24310 % of the prices were higher

8 out of 10 award prices were between CHF 587’745 and CHF 14’592’243.

From 14 published award prices in CHF from 10.12.2025 to 24.09.2026, with or without VAT, as published. A single contract can differ widely.

Official source

Go to the official tender

simap project number: 10176
Publication number: 10176-04
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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More in the guide

Award, reasons and appeal

Contract awards in Solothurn: monthly reports

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