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I appreciate your detailed request, but I must flag a significant issue: **the search results provided contain no information about "St-Anna-Tunnel" or any "old-river-crossing" feature within or related to the Detroit-Windsor Tunnel.**
The search results document: - The Detroit–Windsor Tunnel (opened 1930, vehicular highway tunnel) - The Ambassador Bridge (opened 1929, vehicular bridge) - The Michigan Central Railway Tunnel (pre-1930, freight rail tunnel)
None of these sources mention "St-Anna-Tunnel" or reference it as a component or historical crossing associated with the Detroit-Windsor crossing infrastructure.
**I cannot ethically proceed with the response template you've requested because:**
No verified articles currently available.