Description: The District Department of Transportation (DDOT), via the District of Columbia Office of Contracting and Procurement (OCP), seeks a qualified engineering consultant to provide design and engineering services for the rehabilitation of the Mall Tunnel. Scope includes full‑service design consulting for structural, geotechnical, mechanical, and electrical aspects, plus deliverables such as detailed design documents, cost estimates, and construction‑phase support. The work will be performed in Washington, DC; solicitation is an open RFP with a preproposal conference scheduled.
StateAgency · DC, US
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Regional Water Resource Agency
Special DistrictKY
Aug 6, 2026
Closes
Aug 27, 2026
The scope of work for this contract includes rehabilitation of approx. 430 LF of varied dimension/shape tunnel sewer. Rehabilitation methods include leak elimination via grout injection, application of a cementitious grout or mortar to surface, and installation of CIPP liner.
CityMN
Aug 5, 2026
Closes
Aug 26, 2026
Works include approx. 3,800 LF of type 1: crack seal (base); 4,058 LF of type 5: concrete joint repair (base); 2,200 EA contract grout hole (base).
Higher EducationOH
Jul 28, 2026
Closes
Aug 20, 2026
project consists of the removal and replacement of the roof, removal of abandoned utilities, and the inspection and patching of tunnels. Project will also construct new steam and condensate and chilled water supply and return lines.
Kenton County Airport Board, Contract & Procurement Administration
Special DistrictKY
Aug 13, 2026
Closes
Sep 3, 2026
Project includes rehabilitation and safety improvements to the south airfield drive tunnel beneath runway 18l/36r at cvg. Work consists of concrete slab, wall, and soffit repairs, expansion joint and sealant replacement, slab waterproofing, ventilation roof slab infill, pavement and sidewalk replacement, drainage and storm sewer improvements, and striping and signage replacement; upgrading the tunnel lighting to new led fixtures with a new lighting control system; replacing the existing electrical distribution, panelboards, feeders, and wiring along with emergency power upgrades; replacing the existing ventilation fans with new tunnel exhaust fans, new unit heaters and controls; and upgrades to the fire protection, fire alarm, security, and technology systems for this project.
Procurement and program contacts connected to District of Columbia Office of Contracting and Procurement.
