Role: Construction Management, Technical Support Client: City of Columbus Construction Cost: $375 Million Technology: EPBM/Slurry TBM Geology:  Karst limestone Diameter: 20 ft (6 m) Length: 23,000 ft (7010 m) Depth: 200 ft (50 m) Project Elements: Combined Sewer Overflow (CSO) Tunnel in urban environment Deep shafts (access and drop shafts) Slurry wall construction Drill and blast shafts, adits, […]

Role: Cost and Risk Verification Check and Expert Review Panel Member Client: Washington State DOT Construction Cost: $3.1 Billion\Technology: EPBM and Cut and Cover Geology:  Soft Ground Dimensions: 58 ft (17.6 m) Length: 9600 ft (2.9 km) Depth: 20-50 ft (6-15 m) Project Elements: Single-tube double-deck tunnel Two lane highways on each level with 50 mph design speed […]

Role: Tunnel, Shaft and Station cavern Design – Precast Concrete Liners, Connections and Complex Fault Crossings Client: Aeroports de Montreal Construction Cost: $600 Million Technology: Drill and Blast Geology: Rock Length: 815 ft (250 m) Diameter: 31 ft (9.6 m) with 79 ft (24 m) span cavern Depth: 86-142 ft (26-43 m) Project Elements: Design of cavern under terminal building Access […]

Role: Microtunnel Designer & Construction Inspection/Administration Client: Cole Engineering Construction Cost: $43 Million Technology: Drill and Blast Geology: Rock Diameter: 1,200mm (48 in) & 1,350mm (54 in) Length: 12,476 m & 1,575 m Depth: 14 m (46 ft) Project Elements: Fourteen (14) microtunneling drives Twelve (12) composite curved drives Long microtunneling drives from 180m to 626m Concrete caisson shafts Shallow […]

Role: Owner’s Engineer for tunnel and Access Shaft; Progressive Design Build Client: Ricondo Construction Cost: $140 Million Technology: CSEM, Drill and Blast Geology:  Soil/Rock Dimensions: 22 ft (6.7 m); Tunnel bifurcation up to 48 ft (14.5 m) span Length: 1780 ft (237 m) Depth: 36-55 ft (11-17 m) Project Elements: (x1) Access Shaft – 36 ft ID x […]

Role: SOE Design of Stations; Design Build for Contractor Client: Walsh-Shea Constructors Construction Cost: $1.27 Billion Technology: Cut and Cover Geology:  Soft Ground; Young and Old Alluvium Dimensions: 3 stations, each 806 x 110 ft (245 x 33 m) – 70 ft (21 m) diameter Length: 13,728 ft (4 km) Depth: 67-71 ft (20-21 m) Project Elements: Basis of […]

This project created a much-needed connection for residents and cyclists in northern Montgomery County, Ohio. LJB completed the feasibility study and final design for the construction of a 1.8-mile bikeway extension, linking the Old National Road Trail to the Great Miami River Recreational Trail. The final route blends on-road bike lanes, a two-way cycle track, […]

Fire Station No. 45 stands as a modern, purpose-built emergency services facility serving the growing needs of a rural area in Ottawa. The 12,000-square-foot facility features a robust 5,100-square-foot apparatus bay with three front and rear doors, a hose drying tower, and dedicated zones for gear storage, workshops, and mechanical systems. Beyond its functional core, […]

LJB supported Chagrin Valley Engineering, LTD (CVE) in the design and plan development for a multi-use trail bridge within the City of Bay Village, Ohio. LJB was responsible for the design, hydraulics, floodplain analysis and structural plans for the trail bridge over Cahoon Creek. The new prefabricated steel truss bridge has an overall span of […]

LJB designed two cast-in-place reinforced concrete slab bridges on SR 698 in Hancock County. LJB worked closely with ODOT District 1 and the Office of Geotechnical Engineering (OGE) during the structure type study to determine the most appropriate and cost-efficient structure types for the project. Our team first completed a hydraulic analysis and scour assessment […]

This project for the Muskingum Watershed Conservancy District involved master planning for a 35-acre, multi-tenant mixed-used development at Atwood Lake. The development will include residential and commercial/retail, emergency management, and common activity spaces, as well as recreational amenities such as trails, boat docks, canoe/kayak launch, swimming beach, and gathering and recreational areas. As a subconsultant, […]

This bridge rehabilitation project involved the replacement of the existing non-composite prestressed concrete box beam superstructure with a new composite box beam superstructure. The three-span bridge (47.5’-48.0’-47.5’) was also widened by 2-feet and converted to semi-integral with new full width reinforced concrete approach slabs. The bridge was closed to traffic during construction and a detour […]