January 4, 2026 - Rockland Tunnel - Allegheny River Trail | Allegheny Valley Trails Association
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After 97 years of wear and tear, the Armstrong Tunnel portals needed a good cleaning, and that’s exactly what they got. Over the past few months, crews have been wet-blasting the north and south entrances/exits to the tunnel. That involved using high-pressure water with abrasive particles to remove almost a century’s worth of soot and grime. Architect Stanley L. Roush designed the portals. In addition to numerous bridges throughout the region, Roush also designed the County Office Building, Corl
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