Overview
Timmons Group has worked with the City’s Dept. of Public Works under an on-call contract since 2004, providing bridge design and inspection services, roadway design, traffic analysis and signal design, bike and pedestrian design, and stormwater design.
As part of this on-call contract, our Structure & Bridge Design group has performed nearly 200 task order assignments in the last five years, primarily focused on performing bridge design and rehabilitation, bridge safety inspections, and load rating analyses for City owned/maintained structures. Representative projects include:
Bridge Safety Inspections
Timmons Group regularly performs bridge safety inspections for City-owned bridges, including routine inspections and interim inspections for fracture critical and poor condition bridges. To-date, Timmons has inspected approximately 50 of the City’s 80 structures. Many of these bridges have been inspected multiple times. This inspection work has included dozens of inspections over both Norfolk Southern and CSX railroads, which requires coordination of Right-of-Entry permits and railroad flagging operations. Representative inspections include the Manchester Bridge (9th St) over the James River, CSX and Norfolk Southern, Manchester On-ramp and Off-ramp over Norfolk Southern, Westwood Avenue over CSX, Arthur Ashe Blvd over CSX, Midlothian Turnpike over CSX.
Richmond Road over Gillies Creek and Stony Run
Timmons Group provided engineering design to replace two fracture-critical bridges for the City. Timmons Group had performed the safety inspection of these bridges for multiple cycles and is currently designing the replacement structures. The existing two-girder-floorbeam-stringer bridges are being replaced by precast concrete arch structures supported on steel H-piles. In addition to structural design, the project includes roadway design, maintenance of traffic (full detour design), utility coordination, hydraulic analysis and scour design, geotechnical engineering, environmental permitting, survey, and right of way coordination. The design incorporates safety improvements with wider travel lanes and bicycle accommodations. Timmons Group is managing all project disciplines, coordinating with the City and VDOT.
Arthur Ashe Boulevard over CSX
Timmons Group is currently designing a replacement bridge for this structure that is approximately 100 years old. The project involves extensive coordination with CSX and Virginia Passenger Rail Authority to determine requirements for vertical and horizontal clearance and allowance for future tracks, including high-speed rail and accommodation for double-stack trains. The project also includes bike/ped accommodations, challenging MOT design, utility coordination, and incorporation of aesthetic design components.
Broad Street over Abandoned CSX Spur
Timmons Group is currently designing a superstructure replacement for the existing bridge that is approximately 100 years old The new superstructure will utilize prestressed concrete box beams and will tie into the existing abutments using frame action. It will also incorporate aesthetic components to closely match the existing bridge, which contributes to a designated historic area. This project involves major maintenance of traffic considerations, utility coordination, and floodplain analysis. There is also significant stakeholder coordination with the adjacent historic Lumpkin Slave Jail and Burial Ground site and coordination with the City’s Urban Design Committee.
Westwood Avenue over CSX Bridge Repairs
Timmons Group initially performed a routine bridge safety inspection of this 8-span bridge over CSX, which identified areas of concrete spalling and delamination on the bottom of the bridge deck and faces of the concrete pier caps and columns. Below several spans of the bridge, there is parking for CSX employees adjacent to the nearby rail yard. A few months after the inspection, pieces of spalled concrete from below the bridge fell on one employee’s car. The City immediately mobilized Timmons Group to perform a follow-up inspection to identify the most critical repairs. We quickly developed repair plans to remove loose concrete and patch spalled/delaminated areas on the deck and piers, and then coordinated with the City’s on-call contractor to perform the repairs.
