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CI31 - Excavation et construction de la structure auxiliaire SA6

Issued by Société de transport de Montréal · via SEAO — Québec government electronic tendering system

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Published
9 Oct 2026
Closes
3 Dec 2026, 18:30 UTC
Reference
6000038226
Location
Québec — Montréal, Canada
Sector
Construction & Infrastructure
Type
works

This notice was amended

Details changed after publication. Re-check the official notice before bidding.

  • Submission deadline changed from 3 Dec 2026, 18:31 UTC to 3 Dec 2026, 18:30 UTC
    First seen by FreeTender on 10 Oct 2026 — most portals don’t publish when a corrigendum was issued.

At a glance

Société de transport de Montréal in Canada has published a tender in construction & infrastructure: “CI31 - Excavation et construction de la structure auxiliaire SA6”. Submissions close on 3 December 2026, 55 days from today. Quote reference 6000038226 in any correspondence with the buyer. FreeTender has recorded 21 notices from this buyer since 2026, 16 of them currently open. There are 732 open construction & infrastructure notices in Canada on FreeTender. Bids are submitted to the buyer through SEAO — Québec government electronic tendering system, not through FreeTender.

Details

Le prolongement de la ligne bleue constitue une nouvelle phase de construction du réseau du métro de Montréal. La conception des stations du prolongement de la ligne bleue reflètera le mouvement architectural de son époque, tout en maintenant la continuité avec le réseau existant du métro de Montréal. Dans le cadre du présent appel d’offres, la STM désire obtenir des soumissions pour le lot CI31 - Excavation et construction de la structure auxiliaire SA6

Buyer: Société de transport de Montréal

Notice type: Call for Tenders

Contract nature: Construction work

SEAO number: 6000038226

Planned duration: 41 months

Duration including options: 41 months

Delivery region(s): Montréal

Territory: Open to all, without territorial limits

Trade agreements: None applicable

Category: C01 - Buildings

UNSPSC: 72000000 - Building and facility construction and maintenance services; 72120000 - Nonresidential building construction services; 72141511 - Digging services

Submission deadline: 2026-12-03 No later than 13:30 Quebec Legal Time

Bid opening: 2026-12-03 13:30 Quebec Legal Time

Electronic submission: Yes, via SEAO, with a document

Tender documents: 6000038226_CI31_Devis IM (171 p.); 6000038226_CI31_Plans IM (46 p.); 6000038226_CI31_Liste IM (7 p.); 6000038226_CI31_Devis MOB (268 p.); 6000038226_CI31_Plans MOB_2 de 2 (1 p.); 6000038226_CI31_Liste MOB (3 p.); 6000038226_CI31_Plans TU (14 p.); 6000038226_CI31_Liste TU (2 p.); 6000038226_CI31_Devis AR (387 p.); 6000038226_CI31_Liste AR (4 p.)

Tender documents are obtained through SEAO (seao.gouv.qc.ca), which charges a fee for document orders.

Context for bidders

We hold 21 notices from Société de transport de Montréal, going back to March 2026 — 16 of them still open. They buy mostly in Construction & Infrastructure, Manufacturing & Supply and Transport & Logistics. There are 732 open Construction & Infrastructure tenders in Canada. This one closes in 55 days.

Before you bid on this tender

A quick checklist to help you decide whether to bid and prepare a compliant submission for this construction & infrastructure opportunity. Always verify the details on the official source.

  • Confirm the exact closing date and time (and time zone) on the official portal — deadlines are strict and can be revised by a corrigendum.
  • Read the full notice and every attached document, including the scope, specifications and any bill of quantities or terms of reference.
  • Check the eligibility criteria — prior similar experience, annual turnover, certifications and registrations — and make sure you qualify before investing effort.
  • Prepare any earnest-money deposit (EMD) or bid security and the required formats early; missing or wrongly-formatted documents are a common cause of rejection.
  • Note how bids must be submitted (online or physical), in what format, and whether a digital signature or portal registration is required.
  • Watch for corrigenda and clarifications right up to the deadline — requirements and dates can change.
Common bidding mistakes to avoid →Writing a winning proposal

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