U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Bridges & Structures

 

Detailed Code Mapping for Individual Data Items

The Data Crosswalk is a detailed mapping of the relationship between the Coding Guide (CG) data items and the data items described in the Specifications for the National Bridge Inventory (SNBI). It establishes the rules for data transition, defines temporary codes to be used only during the transition period, and defines data tags to be used for SNBI-based data submittals. Learn more about the Data Crosswalk at Memorandum - Implementation of the Specifications for the National Bridge Inventory (.pdf). The Primary Spreadsheet referenced in that memorandum is the Data Crosswalk for "Over" Records and "Under" Records, while the Detailed Spreadsheet is comprised of the tables found on this page.

The tables below are also available in Excel format - codemapping.xlsx 

General Notes Regarding Transition of Data:

  1. Certain assumptions must be made in transitioning data from a Coding Guide-based dataset to a SNBI-based dataset. Because the Coding Guide does not identify situations where there are multiple instances of a certain type of feature (highway, railroad, etc.) carried on or below the bridge, we must assume for the purposes of transition that there is a single instance. Likewise, we must assume only one route per highway, only one main span set and one approach span set. These assumptions will be correct in many cases, but the data should be adjusted after transition for bridges where these assumptions do not apply.
  2. Values not noted result in a null value.
  3. The phrase "See table," in the Notes to Developer column of the Data Crosswalk for "Over" Records and "Under" Records refers to the tables for each item on this page.
  4. Some Coding Guide codes do not transition into a permanent SNBI code, but may transition into a temporary code. Temporary codes are indicated by a "-T" appended to the code, the word "TEMP" prefacing the information in the Description column, and an asterisk in the TEMP column. The Description column gives a description of the temporary code and the possible permanent codes that could be mapped from that temporary code. All temporary codes should be updated to permanent codes in accordance with the established timeline.
  5. See additional notes on the Data Crosswalk for "Over" Records and "Under" Records page.

B.L.09 - Border Bridge Inspection Responsibility

CG ID CG Value SNBI Value SNBI Description
98B 99 0 No responsibility
98B 00 2 Full responsibility
98B Any other value 1 Shared responsibility

Back to top

B.CL.01 and B.CL.02 - Owner and Maintenance Responsibility

CG ID CG Value SNBI Value SNBI Description
21, 22 01 S01 State Transportation Department
21, 22 02 L01 County highway agency
21, 22 03 L02 Town or township highway agency
21, 22 04 L03 City or municipal highway agency
21, 22 11 S02 State park, forest, or reservation agency
21, 22 12 L04 Local park, forest, or reservation agency
21, 22 21 SX Other State agency
21, 22 25 LX Other local agency
21, 22 26 P Private
21, 22 27 R Railroad
21, 22 31 S03 State toll authority
21, 22 32 L05 Local toll authority
21, 22 40 T Transit agency/authority
21, 22 54 F08 Federal Emergency Management Agency (FEMA)
21, 22 55 F09 International Boundary and Water Commission, United States Section
21, 22 56 F07 U.S. Department of Veterans Affairs
21, 22 57 F03 General Services Administration (GSA)
21, 22 58 F05 Smithsonian – National Zoo
21, 22 59 D05 National Security Agency (NSA)
21, 22 60 FX Other Federal agency
21, 22 61 I Indian Tribal Government
21, 22 62 FL01 Bureau of Indian Affairs (BIA)
21, 22 63 FL04 U.S. Fish and Wildlife Service (FWS)
21, 22 64 FL07 U.S. Forest Service (USFS)
21, 22 66 FL05 National Park Service (NPS)
21, 22 67 F06 Tennessee Valley Authority (TVA)
21, 22 68 FL02 Bureau of Land Management (BLM)
21, 22 69 FL03 Bureau of Reclamation (USBR)
21, 22 70 FL06 U.S. Army Corps of Engineers (USACE)
21, 22 72 D01 Air Force
21, 22 73 D03 Navy/Marines
21, 22 74 D02 Army
21, 22 75 F04 National Aeronautics and Space Administration (NASA)
21,22 76 T Transit agency/authority
21, 22 77 D04 Pentagon
21, 22 78 F01 Agriculture Research Service (ARS)
21, 22 79 F02 Department of Energy (DOE)
21, 22 80 U Unknown

Additional SNBI Codes

SNBI Value SNBI Description
FL0X Other Federal Lands Management Agency
DX Other Department of Defense

Back to top

B.CL.03 - Federal or Tribal Land Access

CG ID CG Value SNBI Value SNBI Description
105 0 N Not applicable
105 1 BIA Indian Tribal Government or Bureau of Indian Affairs
105 2 USFS U.S. Forest Service
105 3 BLM Bureau of Land Management
105 4 BIA|USFS  
105 5 BIA|BLM  
105 6 BLM|USFS  
105 9 BIA|BLM|USFS  

Additional SNBI Codes

SNBI Value SNBI Description
NPS National Park Service
USACE U.S. Army Corps of Engineers
USBR Bureau of Reclamation
USFWS U.S. Fish and Wildlife Service
X Other

Note: Multiple values can be stored for this item.

Back to top

B.CL.04 - Historic Significance

CG ID CG Value SNBI Value SNBI Description TEMP
37 1 1 Bridge is on the National Register  
37 2 2 Bridge is eligible for the National Register  
37 3 T TEMP - 3 or 4 or 5 or 6 *
37 4 7 Historic significance of the bridge has not been determined  
37 5 N Bridge is not eligible for the National Register, and is not in a historic district eligible for the National Register  

*Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
3 Bridge is in a historic district that is on or eligible for the National Register, and contributes to the eligibility of the district
4 Bridge is in a historic district that is on or eligible for the National Register, but does not contribute to the eligibility of the district
5 Bridge is potentially eligible for the National Register, or potentially contributes to a historic district, but has not been evaluated
6 Bridge is on a State or local historic register, but is not eligible for the National Register

Back to top

B.CL.05 - Toll

CG ID CG Value SNBI Value SNBI Description
20 1 1 Toll bridge not under FHWA Toll Agreement
20 2 3 Bridge carries a toll road not under FHWA Toll Agreement
20 3 N Bridge does not carry a toll road and is not a toll bridge
20 4 4 Bridge carries a toll road under FHWA Toll Agreement
20 5 2 Toll bridge under FHWA Toll Agreement

Back to top

B.SP.01 - Span Configuration Designation

CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI Value SNBI Description
43B 19 44B 000 C01 Culvert
43B 19 44B Not 000 C01 and C02 Culvert
43B Any other value 44B 000 M01 Main
43B Any other value 44B Not 000 M01 and A01 Main and Approach

Back to top

B.SP.04 - Span Material

CG ID CG Value SNBI Value SNBI Description TEMP
43A/44A 0 X-T TEMP - other *
43A/44A 1, 2 CR-T TEMP - reinforced concrete - C01 or C02 or CX *
43A/44A 3, 4 S-T TEMP - steel - S01 or S02 or S03 or S04 or S05 or SX *
43A/44A 5, 6 CP-T TEMP - prestressed concrete - C03 or C04 or C05 *
43A/44A 7 T-T TEMP - timber - T01 or T02 or T03 or T04 or TX *
43A/44A 8 M-T TEMP - masonry - M01 or M02 *
43A/44A 9 AI-T TEMP - aluminum, wrought iron, or cast iron - A01 or I01 or I02 *

* Temporary code to be phased out

SNBI Codes

SNBI Value SNBI Description
A01 Aluminum
C01 Reinforced concrete – cast-in-place
C02 Reinforced concrete – precast
C03 Prestressed concrete – pre-tensioned
C04 Prestressed concrete – cast-in-place post-tensioned
C05 Prestressed concrete – precast post-tensioned
CX Concrete – other
F01 FRP composite – aramid fiber
F02 FRP composite – carbon fiber
F03 FRP composite – glass fiber
FX FRP composite – other
I01 Iron – cast
I02 Iron – wrought
M01 Masonry – block
M02 Masonry – stone
P01 Plastic – Polyethylene
PX Plastic - other
S01 Steel – rolled shapes
S02 Steel – welded shapes
S03 Steel – bolted shapes
S04 Steel – riveted shapes
S05 Steel – bolted and riveted shapes
SX Steel – other
T01 Timber – glue laminated
T02 Timber – nail laminated
T03 Timber – solid sawn
T04 Timber – stress laminated
TX Timber – other
X Other

Back to top

B.SP.05 - Span Continuity

CG ID 1 CG Value 1 CG ID 2 CG Value 2 CG ID 3 CG Value 3 SNBI Value SNBI Description TEMP
    43A/44A 2,4,6     C-T TEMP - continuous - 2 or 3 *
        43B/44B 7 6 Frame  
        43B/44B 11, 12 2 Continuous - applies only if the sum of Item 45 and 46 is greater than zero  
        43B/44B 13, 14 2 Continuous  
        43B/44B 19 7-T TEMP - buried *
43/44 Any other value         1 Simple or single span  

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
3 Continuous for live loads only
4 Cantilever
5 Cantilever with pin and hanger

Back to top

B.SP.06 - Span Type

CG ID CG Value SNBI Value SNBI Description TEMP
43B/44B 00 X-T TEMP - other *
43B/44B 01 S-T TEMP - slab - S01 or S02 *
43B/44B 02 GB-T TEMP - girder/beam - G01 or G02 or G10 or GX *
43B/44B 03 G09 Girder/beam – girder & floor beam  
43B/44B 04 GT-T TEMP - tee beam - G03 or G04 or G05 or G06 *
43B/44B 05 BM-T TEMP - box girder/beam - multiple - B02 or B03 *
43B/44B 06 BS-T TEMP - box girder/beam - single or spread - B01 or B03 *
43B/44B 07 F-T TEMP - frame - F01 or F02 or F03 or F04 *
43B/44B 08 S-T TEMP - slab - S01 or S02 *
43B/44B 09 T01 Truss – deck  
43B/44B 10 T-T TEMP - truss - through or pony - T02 or T03 *
43B/44B 11 AD-T TEMP - deck arch - A01 or A02 or A03 *
43B/44B 12 AT-T TEMP - through or tied arch - A04 or A05 *
43B/44B 13 L01 Cable – suspension  
43B/44B 14 L-T TEMP - cable-stayed or extradosed - L02 or L03 *
43B/44B 15 M01 Movable – vertical lift  
43B/44B 16 M02 Movable – bascule  
43B/44B 17 M03 Movable – swing  
43B/44B 19 C-T TEMP - CULVERT - arch, frame, or pipe *
44B 20 Z-T TEMP - MIXED TYPES *
43B/44B 21 B04 Box girder/beam – segmental  
43B/44B 22 GC-T TEMP - channel beam - G07 or G08 *

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
A01 Arch – under fill without spandrel
A02 Arch – open spandrel
A03 Arch – closed spandrel
A04 Arch – through
A05 Arch – tied
B01 Box girder/beam – single
B02 Box girder/beam – multiple adjacent
B03 Box girder/beam – multiple spread
F01 Frame – three-sided
F02 Frame – four-sided
F03 Frame – K-shaped
F04 Frame – delta-shaped
G01 Girder/beam – I-shaped adjacent
G02 Girder/beam – I-shaped spread
G03 Girder/beam – tee-beam
G04 Girder/beam – inverted tee-beam
G05 Girder/beam – double-tee adjacent
G06 Girder/beam – double-tee spread
G07 Girder/beam – channel adjacent
G08 Girder/beam – channel spread
G10 Girder/beam – through girder
GX Girder/beam – other
L02 Cable – cable-stayed
L03 Cable – extradosed
LX Cable – other
MX Movable – other
P01 Pipe - rigid
P02 Pipe - flexible
S01 Slab - solid
S02 Slab - voided
T02 Truss – through
T03 Truss – pony
X01 Other – railroad flat car
X02 Other – ferry transfer
X03 Other – floating
X Other

 

Back to top

B.SP.09 - Deck Material and Type

CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI Value SNBI Description TEMP
    107 1 CR-T TEMP - concrete cast-in-place - C01 or C04 or CX *
    107 2 CP-T TEMP - concrete precast - C02 or C03 or C05 or CX *
    107 3 S01 Steel – open grid  
    107 4 S02 Steel – filled or partially filled grid  
43B/44B not 08 107 5 S-T Steel – plate or orthotropic - S03 or S04 *
43B/44B 08 107 5 S04 Steel – orthotropic  
    107 6 S05 Steel – corrugated  
    107 7 A01 Aluminum  
    107 8 T-T TEMP - timber - T01 or T02 or T03 or T04 or TX *
    107 9 X-T TEMP - other - CX or F01 or F02 or F03 or FX or SX or X *
    107 N 0 None  

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
C01 Reinforced concrete – cast-in-place
C02 Reinforced concrete – precast
C03 Prestressed concrete – pre-tensioned
C04 Prestressed concrete – cast-in-place post-tensioned
C05 Prestressed concrete – precast post-tensioned
CX Concrete – other
F01 FRP composite – aramid fiber
F02 FRP composite – carbon fiber
F03 FRP composite – glass fiber
FX FRP composite – other
SX Steel – other
T01 Timber – glue laminated
T02 Timber – nail laminated
T03 Timber – solid sawn
T04 Timber – stress laminated
TX Timber – other
X Other

Back to top

B.SP.10 - Wearing Surface

CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI Value SNBI Description TEMP
    108A 0 0 None  
    108A 1 C01 Concrete – monolithic  
    108A 2 C02 Concrete – unmodified  
    108A 3 C-T TEMP - concrete – additive - C03 or C05 or C06 or C07 or CX *
    108A 4 C04 Concrete – low slump  
    108A 5 P-T TEMP - polymer – P01 or P02 or PX *
    108A 6 B01 Bituminous (asphalt)  
    108A 7 T01 Timber – running planks  
    108A 8 E01 Earth – gravel or soil  
    108A 9 X-T TEMP - other *
107 any value 108A N no value    
107 N 108A any value no value    

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
C03 Concrete – latex modified
C05 Concrete – fiber reinforced
C06 Concrete – microsilica
C07 Concrete – polyester
CX Concrete – other
CU Concrete – unknown
P01 Polymer – epoxy
P02 Polymer – polyester
PX Polymer – other
S01 Steel

Back to top

B.SP.11 - Deck Protective System

CG ID 1 CG Value 1 CG ID 2 CG Value 2 CG ID 3 CG Value 3 SNBI Value SNBI Description TEMP
    108C any value 108B 1 M01 Membrane – built up  
    108C any value 108B 2 M02 Membrane – sheet  
    108C any value 108B 3 MX-T TEMP - other *
    108C any value 108B 8 MU Membrane – unknown  
    108C any value 108B 9 MX-T TEMP - other *
    108C Not 6 or 7 108B 0 0 None  
    108C 6 108B 0 A03 Admixture – polymer impregnated  
    108C 7 108B 0 A01 Admixture – internally sealed  
107 N 108C any value 108B any value no value    

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
A02 Admixture – low permeability
A04 Admixture – corrosion inhibitor
A05 Admixture – ASR inhibitor
AX Admixture – other
C01 Coating – paint
C02 Coating – silane/siloxane
C03 Coating – methacrylate
CX Coating – other
M03 Membrane – liquid applied
MX Membrane – other
P01 Patina – weathering steel
X Other

Back to top

B.SP.12 - Deck Reinforcing Protective System

CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI Value SNBI Description TEMP
    108C 0, 6, or 7 0 None  
    108C 1 C01 Coating – epoxy coated  
    108C 2 C02 Coating – galvanized  
    108C 3 C-T TEMP - coating - C03 or CX *
    108C 4 S-T TEMP - sacrificial - S01 or S02 or SX *
    108C 8 or 9 X-T TEMP - other or unknown *
    108C N no value    
107 N 108C any value no value    

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
C03 Coating – metalized
CX Coating – other
R01 Reinforcing – stainless, clad
R02 Reinforcing – stainless, solid
R03 Reinforcing – high chromium
R04 Reinforcing – FRP, aramid fiber
R05 Reinforcing – FRP, carbon fiber
R06 Reinforcing – FRP, glass fiber
R07 Reinforcing – FRP, other
RX Reinforcing – other
S01 Sacrificial – cathodic, passive
S02 Sacrificial – cathodic, active
SX Sacrificial – other
X Other

Back to top

B.RH.01 and B.RH.02 - Bridge Railings and Transitions

CG ID CG Value SNBI Value SNBI Description TEMP
36A/B 0 I0-T TEMP - required and not present or does not meet standards - I or 0 (zero) *
36A/B 1 Y-T TEMP - crash-tested or meets approved standards - numerous possible codes *
36A/B N N Not applicable – roadside hardware is not required.  

* Temporary code to be phased out

Back to top

B.F.01, B.F.02, B.F.03 - Feature Type, Feature Location, and Feature Name

Features Carried On Bridge
CG ID 1 CG Value 1 CG Description 1 CG ID 2 CG Value 2 CG Description 2 SNBI Item 1 SNBI Value 1 SNBI Item 2 SNBI Value 2 SNBI Description 2 SNBI Item 3 SNBI Value 3 Note
      42A 1 Highway B.F.01 H01 B.F.02 C Carried on bridge B.F.03 CG Item 7  
      42A 4 Highway - Railroad B.F.01 H01 & R01 B.F.02 C Carried on bridge B.F.03 CG Item 7 2 records.
      42A 5 Highway - Trail B.F.01 H01 & P01 B.F.02 C Carried on bridge B.F.03 CG Item 7 2 records.
      42A 6 Highway B.F.01 H01 B.F.02 C Carried on bridge B.F.03 CG Item 7  
      42A 7 Highway B.F.01 H01 B.F.02 C Carried on bridge B.F.03 CG Item 7  
      42A 8 Highway B.F.01 H01 B.F.02 C Carried on bridge B.F.03 CG Item 7  

 

Features Located Below Bridge
CG ID 1 CG Value 1 CG Description 1 CG ID 2 CG Value 2 CG Description 2 SNBI Item 1 SNBI Value 1 SNBI Item 2 SNBI Value 2 SNBI Description 2 SNBI Item 3 SNBI Value 3 Note
42B 1 Highway 42A any value   B.F.01 H02 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 2 Railroad 42A 4 Highway - Railroad B.F.01 R02 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 2 Railroad 42A not 4 No Railroad B.F.01 R01 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 3 Trail 42A 5 Highway - Trail B.F.01 P02 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 3 Trail 42A not 5 No Trail B.F.01 P01 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 4 Highway - Railroad 42A 4 Highway - Railroad B.F.01 H02 & R02 B.F.02 B Below bridge B.F.03 CG Item 6a 2 records.
42B 4 Highway - Railroad 42A not 4 No Railroad B.F.01 H02 & R01 B.F.02 B Below bridge B.F.03 CG Item 6a 2 records.
42B 5 Waterway 42A any value   B.F.01 W01 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 6 Highway - Waterway 42A any value   B.F.01 H02 & W01 B.F.02 B Below bridge B.F.03 CG Item 6a 2 records.
42B 7 Railroad - Waterway 42A 4 Highway - Railroad B.F.01 R02 & W01 B.F.02 B Below bridge B.F.03 CG Item 6a 2 records.
42B 7 Railroad - Waterway 42A not 4 No Railroad B.F.01 R01 & W01 B.F.02 B Below bridge B.F.03 CG Item 6a 2 records.
42B 8 Highway - Waterway - Railroad 42A 4 Highway - Railroad B.F.01 H02 & W01 & R02 B.F.02 B Below bridge B.F.03 CG Item 6a 3 records.
42B 8 Highway - Waterway - Railroad 42A not 4 No Railroad B.F.01 H02 & W01 & R01 B.F.02 B Below bridge B.F.03 CG Item 6a 3 records.
42B 9 Relief for Waterway 42A any value   B.F.01 F01 B.F.02 B Below bridge B.F.03 CG Item 6a  
42B 0 Other 42A any value   B.F.01 X01 B.F.02 B Below bridge B.F.03 CG Item 6a  

Note: Each bridge record should have one set of feature records from the Features Carried On Bridge table and one from the Features Located Below Bridge table. Bridges where Item 42A = 2, 3, 9, 0, or null are not highway bridges and should be omitted.

Back to top

B.RT.02 - Route Number

CG ID CG Value SNBI Value SNBI Description
5E 0 no value  
5E 1 N North
5E 2 E East
5E 3 S South
5E 4 W West

Note: Item B.RT.02 is mapped by combining CG Item 5D (Route Number) and Item 5E (Directional Suffix). Item 5E applies only when the directional letters are included as part of the route number.

Back to top

B.RT.03 - Direction of Traffic

CG ID CG Value SNBI Value SNBI Description TEMP
102 1 1-T TEMP - One-way traffic - NB or EB or SB or WB *
102 2 or 3 2-T TEMP - Two-way traffic - NS or EW *
102 any other value no value    

* Temporary code to be phased out

SNBI Codes

SNBI Value SNBI Description
NB Northbound
EB Eastbound
SB Southbound
WB Westbound
NS Northbound and Southbound
EW Eastbound and Westbound

Back to top

B.H.01 - Functional Classification

CG ID CG Value SNBI Value SNBI Description TEMP
26 01 1 Interstate  
26 02 3 Principal Arterial – Other  
26 06 4 Minor Arterial  
26 07 5 Major Collector  
26 08 6 Minor Collector  
26 09 7 Local  
26 11 1 Interstate  
26 12 2 Principal Arterial – Other Freeways and Expressways  
26 14 3 Principal Arterial – Other  
26 16 4 Minor Arterial  
26 17 C-T TEMP - collector - 5 or 6 *
26 19 7 Local  

* Temporary code to be phased out

Back to top

B.H.02 - Urban Code

CG ID CG Value SNBI Value SNBI Description TEMP
26 01, 02, 06, 07, 08, or 09 99999 Rural  
26 11, 12, 14, 16, 17, or 19 T-U TEMP - urban *

* Temporary code to be phased out

Back to top

B.H.03 - NHS Designation

CG ID CG Value SNBI Value SNBI Description
104 0 N Non-NHS
104 1 Y NHS

Back to top

B.H.04 - National Highway Freight Network

CG ID CG Value SNBI Value SNBI Description TEMP
110 0 N Not on the NHFN  
110 1 1-T TEMP - NHFN - 1 or 2 or 3 or 4 *

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
1 Primary Highway Freight System
2 Interstate portions not on the Primary Highway Freight System
3 Critical Rural Freight Corridor
4 Critical Urban Freight Corridor

Back to top

B.H.05 - STRAHNET Designation

CG ID CG Value SNBI Value SNBI Description
100 0 N Not a STRAHNET route
100 1 1 STRAHNET route
100 2 1 STRAHNET route
100 3 2 STRAHNET Connector route

Back to top

B.N.01 - Navigable Waterway

CG ID CG Value SNBI Value SNBI Description
38 N no value  
38 0 N Not navigable waters
38 1 Y Navigable waters

Additional SNBI Codes

SNBI Value SNBI Description
U Navigable waters designation is undetermined

Back to top

B.N.02 - Navigation Minimum Vertical Clearance

CG ID CG Value CG ID2 CG Value3 SNBI Value
38 1 43B 15 Item 116 value
38 1 43B Any other value Item 39 value
38 any other value     no value

Back to top

B.N.06 - Substructure Navigation Protection

CG ID CG Value SNBI Value SNBI Description TEMP
111 null no value    
111 1 1-T TEMP - Not Required - 0 or 1 *
111 2 2 In place and functioning  
111 3 3 In place but damaged/deteriorated  
111 4 4 In place but reevaluation of design suggested  
111 5 5 None present but reevaluation of need recommended  

TEMP = Temporary code to be phased out

Back to top

B.LR.01 - Design Load

CG ID CG Value SNBI Value SNBI Description
31 null no value  
31 0 U Unknown
31 1 H10 H-10
31 2 H15 H-15
31 3 HS15 HS-15
31 4 H20 H-20
31 5 HS20 HS-20
31 6 HS20M HS-20 and Military
31 7 no value  
31 8 RR Railroad
31 9 HS20Plus Greater than HS-20
31 A HL93 HL-93
31 B HL93Plus Greater than HL-93
31 C X Other

Back to top

B.LR.04 - Load Rating Method

CG ID CG Value SNBI Value SNBI Description
63 null no value  
63 0 EJ Field evaluation and documented engineering judgment
63 1 LFR Load Factor Rating
63 2 ASR Allowable Stress Rating
63 3 LRFR Load and Resistance Factor Rating
63 4 LT Load Testing
63 5 N No rating anlysis or evaluation has been performed
63 6 LFR Load Factor Rating
63 7 ASR Allowable Stress Rating
63 8 LRFR Load and Resistance Factor Rating
63 A AR Assigned Rating
63 B AR Assigned Rating
63 C AR Assigned Rating
63 D AR Assigned Rating
63 E AR Assigned Rating
63 F AR Assigned Rating

Back to top

B.PS.01 - Load Posting Status

CG ID CG Value SNBI Value SNBI Description TEMP
41 null no value    
41 A PO Permanent bridge in place, open with no restrictions  
41 B PA-T TEMP - Permanent or temporary bridge in place, posting needed - PA or PD or PM or TA or TD or TM or SA or SD or SM *
41 D SO Permanent bridge with temporary shoring, open with no restrictions  
41 E TO Temporary bridge in place, open with no restrictions  
41 G N New bridge not yet open to traffic  
41 K C Bridge is closed to all traffic  
41 P PP-T TEMP - Permanent or temporary bridge in place, posted for load - PP or TP or SP *
41 R PR-T TEMP - Permanent or temporary bridge in place, posted for restriction other than load - PR or TR or SR *

* Temporary code to be phased out

Back to top

B.IE.01, B.IE.02, and B.IE.05 - Inspection Type, Inspection Begin Date, and Inspection Interval

Inspection Events for Routine and Initial Inspections:
CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI ID 1 SNBI Value 1 SNBI Description 1 SNBI ID 2 SNBI Value 2 SNBI ID 3 SNBI Value 3
90 MMYY 91 XX B.IE.01 2 Routine (if Item 8 matches a previous year of data) B.IE.02 20YYMM01 B.IE.05 XX, but drop leading zero
90 MMYY 91 XX B.IE.01 1 Initial (otherwise) B.IE.02 20YYMM01 B.IE.05 XX, but drop leading zero
Inspection Events for NSTM Inspections:
CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI ID 1 SNBI Value 1 SNBI Description 1 SNBI ID 2 SNBI Value 2 SNBI ID 3 SNBI Value 3
92A YXX 93A MMYY B.IE.01 4 NSTM B.IE.02 20YYMM01 B.IE.05 XX, but drop leading zero
92A any other value 93A MMYY B.IE.01 4 NTSM B.IE.02 20YYMM01 B.IE.05 no value
92A any value 93A any other value B.IE.01 no value   B.IE.02 no value B.IE.05 no value
Inspection Events for Underwater Inspections:
CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI ID 1 SNBI Value 1 SNBI Description 1 SNBI ID 2 SNBI Value 2 SNBI ID 3 SNBI Value 3
92B YXX 93B MMYY B.IE.01 3 Underwater B.IE.02 20YYMM01 B.IE.05 XX, but drop leading zero
92B any other value 93B MMYY B.IE.01 3 Underwater B.IE.02 20YYMM01 B.IE.05 no value
92B any value 93B any other value B.IE.01 no value   B.IE.02 no value B.IE.05 no value
Inspection Events for Special Inspections:
CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI ID 1 SNBI Value 1 SNBI Description 1 SNBI ID 2 SNBI Value 2 SNBI ID 3 SNBI Value 3
92C YXX 93C MMYY B.IE.01 7 Special B.IE.02 20YYMM01 B.IE.05 XX, but drop leading zero
92C any other value 93C MMYY B.IE.01 7 Special B.IE.02 20YYMM01 B.IE.05 no value
92C any value 93C any other value B.IE.01 no value   B.IE.02 no value B.IE.05 no value

Note: Repeat all actions for previous datasets in the NBI, going back year by Note: Repeat all actions for previous datasets in the NBI, going back year by year until you reach the first dataset (which for the first set of criteria will set B.IE.01 to 1 - Initial). Do not create an inspection event for a MMYY date that has already been used (i.e. the same date may appear in multiple consecutive datasets - only the most recent data for a single date should be used to create an inspection event).

Note: Date field DD = 01 is a proxy value, as CG does not include a day.

Back to top

B.C.11 and B.AP.03 - Scour Condition Rating and Scour Vulnerability

CG ID CG Value SNBI ID 1 SNBI Value 1 SNBI Description 1 SNBI ID 2 SNBI Value 2 SNBI Description 2 TEMP
113 N B.C.11 N   B.AP.03 no value Bridge does not cross over waterway.  
113 U B.C.11 no value   B.AP.03 U Scour appraisal has not been completed due to unknown foundations.  
113 T B.C.11 no value   B.AP.03 0 Scour appraisal has not been completed.  
113 9 B.C.11 9 No scour. B.AP.03 A Scour appraisal completed. Bridge determined to be stable for scour.  
113 8 B.C.11 MI-T TEMP - Scour may exist but has not affected strength or stability - 5 or 6 or 7 or 8 or 9 B.AP.03 AB-T TEMP - Stable for scour, possibly dependent on countermeasures - A or B *
113 7 B.C.11 MI-T TEMP - Scour may exist but has not affected strength or stability - 5 or 6 or 7 or 8 or 9 B.AP.03 BCE-T TEMP - Undesigned scour countermeasures installed - B or C or E *
113 6 B.C.11 no value   B.AP.03 0 Scour appraisal has not been completed.  
113 5 B.C.11 MI-T TEMP - Scour may exist but has not affected strength or stability - 5 or 6 or 7 or 8 or 9 B.AP.03 AB-T TEMP - Stable for scour, possibly dependent on countermeasures - A or B *
113 4 B.C.11 MO-T TEMP - Scour is significant but has not affected strength or stability - 5 or 6 B.AP.03 AB-T TEMP - Stable for scour, possibly dependent on countermeasures - A or B *
113 3 B.C.11 MI-T TEMP - Scour may exist but has not affected strength or stability - 5 or 6 or 7 or 8 or 9 B.AP.03 CD-T TEMP - Unstable for theoretical scour, regardless of any undesigned countermeasures - C or D *
113 2 B.C.11 MA-T TEMP - Scour has affected strength and/or stability of the bridge - 2 or 3 or 4 B.AP.03 CD-T TEMP - Unstable for theoretical scour, regardless of any undesigned countermeasures - C or D *
113 1 B.C.11 1 Bridge is closed to traffic due to scour condition. Channel rehabilitation may return the bridge to service. B.AP.03 CD-T TEMP - Unstable for theoretical scour, regardless of any undesigned countermeasures - C or D **
113 0 B.C.11 0 Bridge is closed due to scour condition, and is beyond corrective action. Bridge replacement is needed to restore service. B.AP.03 CD-T TEMP - Unstable for theoretical scour, regardless of any undesigned countermeasures - C or D **

* Temporary codes for B.C.11 and B.AP.03 to be phased out
** Temporary code for B.AP.03 to be phased out

Additional SNBI Codes for Item B.C.11

SNBI Value SNBI Description
8 Insignificant scour.
7 Some minor scour.
6 Widespread minor or isolated moderate scour.
5 Moderate scour; strength and stability of the bridge are not affected.
4 Widespread moderate or isolated major scour; strength and/or stability of the bridge is affected.
3 Major scour; strength and/or stability of the bridge is seriously affected. Condition typically necessitates more frequent monitoring, load restrictions, and/or corrective actions.
2 Major scour; strength and/or stability of the bridge is severely compromised. Condition typically necessitates frequent monitoring, significant load restrictions, and/or corrective actions to keep the bridge open.

Additional SNBI Codes for Item B.AP.03

SNBI Value SNBI Description
B Scour appraisal completed. Bridge determined to be stable for scour, dependent upon designed, and functioning countermeasures.
C Scour appraisal completed. Bridge could become unstable for scour. Temporary (not designed) countermeasure installed to mitigate scour. Bridge is scour critical.
D Scour appraisal completed. Bridge is, or may become, unstable for scour. Bridge is scour critical.
E Scour appraisal has not been completed. Temporary (not designed) countermeasure installed to mitigate scour.

Back to top

B.AP.01 - Approach Roadway Alignment

CG ID CG Value SNBI Value SNBI Description
72 null no value  
72 0 to 4 P Poor
72 5 to 6 F Fair
72 7 to 9 G Good

Back to top

B.AP.02 - Overtopping Likelihood

CG ID 1 CG Value 1 CG ID 2 CG Value 2 SNBI Value SNBI Description TEMP
71 N 26 any value no value Bridge does not cross over a waterway  
71 9 26 any value 1 Remote – once every 100 years or less frequently  
71 8 26 any value 1 Remote – once every 100 years or less frequently  
71 7 26 any value VLM-T TEMP - Very low to moderate - 2 or 3 or 4 *
71 6 26 08, 09, or 19 1 Remote – once every 100 years or less frequently  
71 6 26 any other value VLM-T TEMP - Very low to moderate - 2 or 3 or 4 *
71 5 26 any value 1 Remote – once every 100 years or less frequently  
71 4 26 08, 09, or 19 5 High - once every 3-10 years  
71 4 26 any other value 1 Remote – once every 100 years or less frequently  
71 3 26 08, 09, or 19 6 Very High - once every 2 years or more frequently  
71 3 26 01, 11, or 12 1 Remote – once every 100 years or less frequently  
71 3 26 any other value 5 High - once every 3-10 years  
71 2 26 any value HVH-T TEMP - High to very high - 5 or 6 *
71 0 26 any value HVH-T TEMP - High to very high - 5 or 6 *

* Temporary code to be phased out

Additional SNBI Codes

SNBI Value SNBI Description
0 Never
2 Very low - once every 51 to 99 years
3 Low - once every 26 to 50 years
4 Moderate - once every 11 to 25 years

Back to top

B.AP.04 - Scour Plan of Action

CG ID CG Value SNBI ID SNBI Value SNBI Description TEMP
113 N B.AP.04 No value    
113 4, 5, 8, 9 B.AP.04 0 A scour POA is not required  
113 Any other value B.AP.04 Y-T A scour POA is required and implemented *

* Temporary code to be phased out

Back to top

Updated: 06/20/2023
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000