BVF provided engineering support services under the MDTA AE3108 contract, delivering comprehensive preliminary and final engineering design solutions for various transportation infrastructure needs. The scope of work included developing task order documents and cost estimating for multiple repair and rehabilitation projects. BVF followed MDTA guidelines to prepare and execute seven task orders, ensuring compliance with ASIR reports, as-built drawings, standard specifications, and MDOT SHA Maintenance of Traffic Standards. BVF developed the task order documents and cost estimates for the following task orders:

1. TO 3031 Update PLC at Curtis Creek

BVF developed the task order documents and cost estimates for Task Order 3031, addressing an urgent Priority 1 defect related to the overtravel alarm on the bascule span control system at the Curtis Creek Bridge (Structures BCZ001051 and BCZ001061) on I-695. Working in coordination with MDTA and the joint venture design team, BVF supported the update of the Programmable Logic Controller (PLC) program, which governs the mechanical and electrical operations of the movable span. The effort included reviewing existing as-built documentation, ASIR reports, and previous rehabilitation project records, particularly from Contract KB 3010. The task addressed conditions observed at the trunnion bearing limit switches, tail lock brackets, and droop cable boxes. BVF ensured the PLC modifications would correct overtravel detection anomalies and restore full functionality to the redundant ring network PLC system responsible for alarm logging, limit switch integration, and sequence interlocking.

2. TO 3032 FMT Leaks Arresting

BVF developed the task order documents and cost estimates under Task Order 3032 supporting leak mitigation efforts at the Fort McHenry Tunnel (FMT), encompassing Bores 1 through 4 of structure BCW561002 on I-95. This task addressed a political-priority assignment to arrest active water infiltration through construction joints, concrete cracks, and liner interfaces within the tunnel’s lower and upper plenums, roadway, and ventilation structures. BVF reviewed detailed ASIR reports and coordinated closely with MDTA to identify defect locations, evaluate deterioration mechanisms, and develop practical repair strategies using specialty sealants and injection grouts such as Koster and Mountain Grout. The scope included detailing of spall repair, joint sealing, crack injection, and moisture mitigation measures across tunnel walls, slabs, and ceilings. BVF produced task order documents and repair procedures for each bore, supporting MDTA’s efforts to extend the tunnel’s service life and address long-standing water intrusion concerns.

3. TO 3038 Concrete Deck Spall Repair at BCWT08021

BVF developed the task order documents and cost estimates under Task Order 3038 for deck repair efforts for the I-395 Ramp G bridge (Structure No. BCWT08021), a nineteen-span steel girder bridge over Middle Branch, CSX tracks, and MTA Light Rail. The scope focused on addressing Priority 1 spalling and delamination issues on the reinforced concrete deck of Span 17. BVF performed field evaluations, coordinated with MDTA and reviewed inspection data to develop targeted concrete repair strategies. The design included partial and full-depth deck patching following SHA Section 400.06 standards, with materials such as Duracrete II and Bonsal Rapid Patch specified for rapid-setting repairs. BVF provided detailed repair procedures, limits of removal, bonding agent specifications, and MOT requirements (MD 104.05-08). Special attention was paid to sawcut perimeters, undercutting profiles, and rideability to ensure long-term durability and a smooth driving surface.

4. TO 3039 Loose Anchor Bolt Nut for BCWT08S10 Sign Structure

BVF developed the task order documents and cost estimates for Task Order 3039, addressing a Priority 1 defect on the overhead sign structure BCWT08S10 located on the I-395 Spur Northbound near the Fort McHenry Tunnel. BVF developed detailed repair procedures in accordance with the 2023 MD SHA Standard Specifications. The repair scope included site-specific maintenance of traffic (MOT) setup, surface preparation, torque verification, nut replacement as needed, and post-repair markings to monitor future displacement. The solution ensured long-term structural stability of the sign support system while meeting safety and documentation requirements set forth by MDTA.

5. TO 3040 Repair Pannel Connection on AAZ050041 (T29-T31)

BVF developed the task order documents and cost estimates for Task Order 3040 for the westbound span of the William Preston Lane, Jr. Memorial Bridge (Structure No. AAZ050041, Spans T29–T31). BVF developed site-specific repair

procedures following MD SHA Section 400.31 for structural bolt replacement. The scope included the use of galvanized F3125 Grade A325 bolts, field verification of dimensions, and cleaning and painting protocols to match the existing finish. BVF also outlined MOT requirements in accordance with MD 104.05-07 for lane closures over the Chesapeake Bay. The repair ensured full restoration of structural integrity and compliance with safety and documentation standards required by MDTA.

6. TO 3179 Spall and Joint Trough Replacement on BCW558021

BVF developed the task order documents and cost estimates under Task Order 3179, addressing structural deterioration on the ramp structure BCW558021, located on I-395 Spur Southbound. BVF conducted field assessments, analyzed inspection data, and prepared detailed repair drawings and specifications. The design included removal of unsound concrete using saw cutting and hydro-demolition, patching with approved rapid-setting materials, and sealing of cracks and joints. For joint trough replacement, BVF specified stainless steel trough sections and anchors, coordinated with drainage details, and ensured compatibility with existing expansion joint systems. MOT plans followed SHA MD 104.11 standards to safely manage traffic during construction. The solution aimed to restore deck integrity, improve water drainage, and extend the service life of the structure.

7. TO 3216 Remove Unsound Concrete and Patch at BCZ001061 (S1-S20) and BCZ001051 (S21-S29)

BVF developed the task order documents and cost estimates for Task Order 3216 at the Curtis Creek Drawbridge (Structures BCZ001061 and BCZ001051) on I-695, focusing on structural concrete deterioration. BVF conducted field investigations and developed a targeted repair approach to remove delaminated and spalled concrete across deck soffits, diaphragms, pier caps, and parapets. Detailed repair drawings and technical specifications aligned with SHA Section 420 and included notes on staging, curing methods, and surface finish criteria. MOT provisions were integrated to facilitate safe access while minimizing traffic disruption. The repairs were designed to restore structural performance, prevent moisture ingress, and extend the operational life of the bridge.