Roadway Items Excluded from Bridge Item Estimate

To calculate the unit cost of a bridge project accurately, the bid items need to be divided in the appropriate manner.
FHWA provides the proper breakout of bridge items from roadway items at https://www.fhwa.dot.gov/bridge/nbi/uc_criteria.pdf
Do not include the following items in the bridge item section of the estimate:
  • Mobilization
  • Demolition of existing structure (Item 496)
  • Bridge approach slabs (only include in the bridge items if the approach slab is integral with the abutment)
  • Stream channel work such as riprap, slope paving
  • Earthwork relating to channel excavation
  • Clearing and grubbing
  • Retaining walls not attached to, or not for the protection of, the abutments
  • Guardrail transitions to bridges
  • Maintenance and protection of traffic
  • Detour costs
  • Signing and marking
  • Lighting
  • Electrical Conduit
  • Inlet frames and grates
  • Field office
  • Construction engineering items
  • Training
  • Right-of-way
  • Utility relocations
  • Contingencies Include the following item with the bridge items section of the estimate:
Include the following item with the bridge items section of the estimate:
  • Riprap if needed for abutment protection
    only
The most current federal requirements can be found
also
on the Bridge Division internal
Bridge Management
 web page.
If you need assistance accessing any of the internal website documents referenced in this chapter, please contact the
District
 with which you are working, or the Bridge Division
Bridge Management Section
.