Beam, Longest and Neff, L.L.C. features one of the most accomplished Bridge Departments in the region. Our award-winning staff is proficient in performing a variety of services from bridge inventory and inspection, to bridge rehabilitation and replacement, to new bridge design.

As a multi-disciplinary firm, we utilize in-house staff experienced in all aspects of bridge rehabilitation and replacement projects. Additionally, BLN has nine (9) INDOT Certified Bridge Inspectors. All nine (9) are also certified to perform complex bridge inspections.

The BLN bridge department works closely with our survey, right-of-way, and environmental departments, as well as with our transportation department, to ensure all elements of your project are completed efficiently.

At BLN, customer service is our #1 priority! The services we provide are customized to our clients needs. We provide options, and turn those options into the most feasible solutions for our clients.


Past Performance



NBIS Inventory


BLN Bridge Small Structure Design

BLN Bridge Design

BLN Bridge Design


Bridge Replacement

  • Long Span-Steel Through and Deck Trusses
  • Medium Span-Prestressed Concrete, Post Tensioned Beams and Steel Girders
  • Small Span--Reinforced Concrete and Post-Tensioned Slabs and Prefabricated Structures
  • Complex Structures--Curved Girder, Post-Tensioned Beams and Slant Leg Frames
  • Other Structures--Railroad & Pedestrian Bridges

Bridge Rehabilitation

  • Interstate Rehabilitation
  • Deck Overlays & Widening
  • Timber Covered Bridges
  • Steel Trusses & Concrete Arches

Complex / Level 3 Bridge Design

  • Complex Geometry
  • Curved girder, beam or box girder
  • Piers over 45 feet tall
  • 3D finite element analysis
  • Through girder railroad bridges
  • Superstructures utilizing post tensioned segmental construction Steel Trusses

Bridge Studies

  • Hydraulic Analysis & Floodplain Modeling
  • Bridge Condition Reports
  • Engineering Assessment Reports
  • Economic Life-Cycle Cost Comparisons

Bridge Inventory & Inspection

    • Bridge & Culvert Inventories
    • Fracture Critical & Special Detail Inspections
    • Innovative In-House Bridge and Culvert Management Program

Segmental Bridge Design