NIGP 90690: Tunnels and Subways - Architectural

NIGP 90690 Tunnels and Subways—Architectural, an Item code, encompasses professional architectural and engineering design services for tunnel and subway infrastructure projects, including assessment, rehabilitation, and safety enhancement work on submerged and underground transit corridors. Recent solicitations show state and local governments buying design services for tunnel tile replacement, motor control systems, system-wide infrastructure inspections, and condition assessments; architectural and engineering design for adaptive reuse and historic preservation projects; and construction project management oversight across both design and construction phases. The issuing bodies include regional toll authorities, county governments, city municipalities, and special-purpose authorities. Harris County Toll Road Authority (HCTRA) is the dominant repeat buyer in the current opportunity set, appearing across multiple discipline-focused RFSQs for professional engineering services spanning roadway, structural, drainage, traffic, tolling, and architectural design work.

Recent activity concentrates in Texas and Georgia. HCTRA has issued multiple RFSQs: one posted July 17, 2026 (due August 17, 2026) for system-wide inspection and condition assessments across roadway, bridge, and facility infrastructure with multiple awards planned; another posted June 26, 2026 (due August 10, 2026) for design consultant services on the Hardy Downtown Connector Program's roadway and structural segments; and a June 12, 2026 RFQ for on-call services spanning 19 engineering and design disciplines. Specific tunnel work includes two HCTRA RFSQs for Washburn Tunnel safety enhancements: one posted March 20, 2026 (due May 4, 2026) for motor control center replacement design, and another posted March 13, 2026 (due April 6, 2026) for tile replacement serving approximately one million ceramic tiles in a 2,936-foot submerged historic tunnel. Outside toll authorities, the City of Union City, Georgia posted an RFP on May 13, 2026 (due June 10, 2026) for building plan review and inspection services; the City of Nicholls, Georgia issued an RFQ on May 6, 2026 (due June 10, 2026) for architectural and engineering services for gymnasium replacement following Hurricane Helene, incorporating FEMA PA Program compliance requirements and M/WBE utilization goals; and Broward County, Florida posted an ITB on May 1, 2026 (due June 2, 2026) for Pine Island Road capacity expansion construction including design-related engineering work subject to 30 percent County Business Enterprise participation goals.