# Quebec SEAO #20182666

Poste Des Sources Substation Construction and Upgrades

**Posted:** November 10, 2026
**Respond By:** December 18, 2026
**Identifier:** 20182666
**NAICS:** 237130, 237990

Hydro-Québec is seeking qualified contractors to construct and upgrade Poste Des Sources, a 315–25 kV substation in Montréal.
- **Buyer:** Hydro-Québec.
- **Scope of work:**
  - Building work: demolition, architectural repairs, structural modifications, and building mechanical work.
  - Civil work: reinforced-concrete and prefabricated foundations, excavation and backfill, steel structure work, waterproofing, and drainage.
  - Electrical installation: replacement of electrical equipment and work on busbars, grounding, and capacitor banks.
  - Control systems: cable and panel work, GPS antenna installation, and operator console installation.
- **OEMs and vendors:** No manufacturers, OEMs, or vendors are named; no specific products, part numbers, or quantities are provided.
- **Notable requirement:** Contractors must be qualified by Hydro-Québec for substation construction in both civil engineering and electrical installation.

### Description

Hydro-Québec is seeking bids for construction work to ensure the long-term viability and upgrade of Poste Des Sources (315-25 kV) in Montréal. The scope includes building and civil work, electrical equipment replacement and installation, and control-system work. Only suppliers qualified by Hydro-Québec in the substation construction category for both civil engineering and electrical installation may bid. The indicative estimated value is $10,000,000–$20,000,000, including options; Hydro-Québec is not committed to this estimate and does not undertake to accept any proposal.

[View original listing](https://seao.gouv.qc.ca/avis-resultat-recherche/consulter?ItemId=4779a89e-be89-4abd-a406-f697b9a7c0e5)