National Bridge Inventory
Every bridge and culvert longer than 20 feet on a public road in North Carolina, as the state, local and federal agencies that own them report them to the Federal Highway Administration (FHWA) each year: where each one is, the route it carries and what it crosses, who owns it, when it was built and rebuilt, how long and wide it is, its traffic and truck share, the condition of its deck, superstructure, substructure or culvert, whether it is in good, fair or poor condition, its load rating and posting, how vulnerable it is to scour, and the work proposed for it and its estimated cost. Good for finding the poor, posted or closed bridges in a county or on a corridor, the bridges a freight route or detour depends on, and where repair and replacement needs are concentrated.
- Published by
- Federal Highway Administration, Office of Bridges and Structures
- Source
- NBI (FHWA National Bridge Inventory)
- Original data
- www.fhwa.dot.gov
- Terms of use
- Public domain (work of the U.S. government); acknowledge FHWA and BTS
- On the map
- Points
From the publisher
The following datasets represent bridge data submitted annually to FHWA by the States, Federal agencies, and Tribal governments in accordance with the National Bridge Inspection Standards and the Recording and Coding Guide for the Structure Inventory and Appraisal of the Nations Bridges. Each dataset is submitted in the spring, and may be corrected or updated throughout the year. The data for public highway bridges is considered final and is published on this website by June 15th of each calendar year.
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Fields
What each record holds, as the publisher describes it: 165 fields.
| Field | Description |
|---|---|
(file year) | Inventory year, 2025 |
(file state) | State code, NC |
STATE_CODE_001 | State FIPS code, 37 |
STRUCTURE_NUMBER_008 | The bridge's structure number, leading spaces removed |
STATE_CODE_001, COUNTY_CODE_003 | County FIPS code, five digits |
ROUTE_PREFIX_005B | Route signing: Interstate highway, U.S. numbered highway, State highway, County highway, City street, … |
ROUTE_PREFIX_005B | The same, as FHWA's code |
SERVICE_LEVEL_005C | Mainline, Alternate, Bypass, Spur, Business, Ramp, wye or connector, Service or frontage road, None |
SERVICE_LEVEL_005C | The same, as FHWA's code |
ROUTE_NUMBER_005D | Route number carried, five digits |
DIRECTION_005E | Directional suffix of the route: North, East, South, West, Not applicable |
DIRECTION_005E | The same, as FHWA's code |
HIGHWAY_DISTRICT_002 | The state transportation department's district |
PLACE_CODE_004 | Census place code, five digits; 00000 outside a place |
FEATURES_DESC_006A | What the bridge crosses |
FACILITY_CARRIED_007 | What the bridge carries |
LOCATION_009 | Where the bridge is, in words |
MIN_VERT_CLR_010 | Minimum vertical clearance over the bridge roadway, meters; 99.99 is no restriction |
KILOPOINT_011 | Kilometer point on the route |
BASE_HWY_NETWORK_012 | On the base highway network |
LRS_INV_ROUTE_013A | Linear referencing system route id |
SUBROUTE_NO_013B | Linear referencing system subroute |
LAT_016 | Latitude, decimal degrees |
LONG_017 | Longitude, decimal degrees (negative) |
DETOUR_KILOS_019 | Added length of the shortest detour, km |
TOLL_020 | Toll bridge, On toll road, On free road, … |
TOLL_020 | The same, as FHWA's code |
MAINTENANCE_021 | Agency responsible for maintenance |
MAINTENANCE_021 | The same, as FHWA's code |
OWNER_022 | Owning agency: State highway agency, County highway agency, City or municipal highway agency, … |
OWNER_022 | The same, as FHWA's code |
FUNCTIONAL_CLASS_026 | Functional class of the route on the bridge, Rural: Minor arterial, Urban: Local, … |
FUNCTIONAL_CLASS_026 | The same, as FHWA's code |
YEAR_BUILT_027 | Year built |
TRAFFIC_LANES_ON_028A | Traffic lanes on the bridge |
TRAFFIC_LANES_UND_028B | Traffic lanes under the bridge |
ADT_029 | Average daily traffic |
YEAR_ADT_030 | Year of the traffic count |
DESIGN_LOAD_031 | Design live load: HS 20, HL 93, … |
DESIGN_LOAD_031 | The same, as FHWA's code |
APPR_WIDTH_MT_032 | Approach roadway width, meters |
MEDIAN_CODE_033 | No median, Open median, Closed median, … |
MEDIAN_CODE_033 | The same, as FHWA's code |
DEGREES_SKEW_034 | Skew angle, degrees; 99 is a varying skew |
STRUCTURE_FLARED_035 | Width varies (flared) |
RAILINGS_036A | Bridge railings: Meets standards, Does not meet standards, Not required |
RAILINGS_036A | The same, as FHWA's code |
TRANSITIONS_036B | Railing transitions, as railings |
TRANSITIONS_036B | The same, as FHWA's code |
APPR_RAIL_036C | Approach guardrail, as railings |
APPR_RAIL_036C | The same, as FHWA's code |
APPR_RAIL_END_036D | Approach guardrail ends, as railings |
APPR_RAIL_END_036D | The same, as FHWA's code |
HISTORY_037 | On or eligible for the National Register of Historic Places, … |
HISTORY_037 | The same, as FHWA's code |
NAVIGATION_038 | Whether the waterway below has navigation control |
NAVIGATION_038 | The same, as FHWA's code |
NAV_VERT_CLR_MT_039 | Navigation vertical clearance, meters |
NAV_HORR_CLR_MT_040 | Navigation horizontal clearance, meters |
OPEN_CLOSED_POSTED_041 | Open, no restriction; Posted for load; Closed to all traffic; … |
OPEN_CLOSED_POSTED_041 | The same, as FHWA's code |
SERVICE_ON_042A | What the bridge carries: Highway, Highway-pedestrian, Railroad, … |
SERVICE_ON_042A | The same, as FHWA's code |
SERVICE_UND_042B | What is under it: Waterway, Highway, Railroad, … |
SERVICE_UND_042B | The same, as FHWA's code |
STRUCTURE_KIND_043A | Main span material: Concrete, Steel, Prestressed concrete, … (continuous where spans are) |
STRUCTURE_KIND_043A | The same, as FHWA's code |
STRUCTURE_TYPE_043B | Main span design: Slab, Stringer/multi-beam or girder, Culvert, Truss, … |
STRUCTURE_TYPE_043B | The same, as FHWA's code |
APPR_KIND_044A | Approach span material, as main_material |
APPR_KIND_044A | The same, as FHWA's code |
APPR_TYPE_044B | Approach span design, as main_design |
APPR_TYPE_044B | The same, as FHWA's code |
MAIN_UNIT_SPANS_045 | Number of main spans |
APPR_SPANS_046 | Number of approach spans |
HORR_CLR_MT_047 | Inventory route total horizontal clearance, meters |
MAX_SPAN_LEN_MT_048 | Length of the longest span, meters |
STRUCTURE_LEN_MT_049 | Structure length, meters |
LEFT_CURB_MT_050A | Left curb or sidewalk width, meters |
RIGHT_CURB_MT_050B | Right curb or sidewalk width, meters |
ROADWAY_WIDTH_MT_051 | Roadway width curb to curb, meters |
DECK_WIDTH_MT_052 | Deck width out to out, meters |
VERT_CLR_OVER_MT_053 | Minimum vertical clearance over the bridge deck, meters; 99.99 is no restriction |
VERT_CLR_UND_REF_054A | What the underclearance is measured to: Highway, Railroad, Neither |
VERT_CLR_UND_REF_054A | The same, as FHWA's code |
VERT_CLR_UND_054B | Minimum vertical underclearance, meters |
LAT_UND_REF_055A | What the lateral underclearance is measured to |
LAT_UND_REF_055A | The same, as FHWA's code |
LAT_UND_MT_055B | Minimum lateral underclearance on the right, meters |
LEFT_LAT_UND_MT_056 | Minimum lateral underclearance on the left, meters |
DECK_COND_058 | Deck condition rating, 0–9 |
SUPERSTRUCTURE_COND_059 | Superstructure condition rating, 0–9 |
SUBSTRUCTURE_COND_060 | Substructure condition rating, 0–9 |
CHANNEL_COND_061 | Channel and channel protection rating, 0–9 |
CULVERT_COND_062 | Culvert condition rating, 0–9 |
OPR_RATING_METH_063 | Method of the operating rating |
OPR_RATING_METH_063 | The same, as FHWA's code |
OPERATING_RATING_064 | Operating rating: metric tons, or a rating factor where the method says so |
INV_RATING_METH_065 | Method of the inventory rating |
INV_RATING_METH_065 | The same, as FHWA's code |
INVENTORY_RATING_066 | Inventory rating, as operating_rating |
STRUCTURAL_EVAL_067 | Structural evaluation appraisal, 0–9 |
DECK_GEOMETRY_EVAL_068 | Deck geometry appraisal, 0–9 |
UNDCLRENCE_EVAL_069 | Underclearance appraisal, 0–9 |
POSTING_EVAL_070 | Load posting appraisal, 0–5: 5 at or above legal loads, lower the further below |
WATERWAY_EVAL_071 | Waterway adequacy appraisal, 0–9 |
APPR_ROAD_EVAL_072 | Approach roadway alignment appraisal, 0–9 |
WORK_PROPOSED_075A | Type of work proposed: replacement, widening, rehabilitation, … |
WORK_PROPOSED_075A | The same, as FHWA's code |
WORK_DONE_BY_075B | Contract or Owner's forces |
WORK_DONE_BY_075B | The same, as FHWA's code |
IMP_LEN_MT_076 | Length of the proposed improvement, meters |
DATE_OF_INSPECT_090 | Month of the last routine inspection (its first day) |
INSPECT_FREQ_MONTHS_091 | Months between routine inspections |
FRACTURE_092A | Fracture-critical inspection required |
FRACTURE_092A | Its interval, months |
UNDWATER_LOOK_SEE_092B | Underwater inspection required |
UNDWATER_LOOK_SEE_092B | Its interval, months |
SPEC_INSPECT_092C | Other special inspection required |
SPEC_INSPECT_092C | Its interval, months |
FRACTURE_LAST_DATE_093A | Month of the last fracture-critical inspection |
UNDWATER_LAST_DATE_093B | Month of the last underwater inspection |
SPEC_LAST_DATE_093C | Month of the last special inspection |
BRIDGE_IMP_COST_094 | Estimated cost of the bridge improvement, dollars |
ROADWAY_IMP_COST_095 | Estimated cost of the roadway improvement, dollars |
TOTAL_IMP_COST_096 | Estimated total project cost, dollars |
YEAR_OF_IMP_097 | Year of the cost estimate |
OTHER_STATE_CODE_098A | Neighboring state's code (FIPS and region digit), CAN or MEX, for a border bridge |
OTHER_STATE_PCNT_098B | Percent the neighboring state is responsible for |
OTHR_STATE_STRUC_NO_099 | The neighboring state's structure number |
STRAHNET_HIGHWAY_100 | Strategic Highway Network designation |
STRAHNET_HIGHWAY_100 | The same, as FHWA's code |
PARALLEL_STRUCTURE_101 | Left or right structure of a parallel pair, or none |
PARALLEL_STRUCTURE_101 | The same, as FHWA's code |
TRAFFIC_DIRECTION_102 | One-way, Two-way, One-lane bridge for two-way traffic, … |
TRAFFIC_DIRECTION_102 | The same, as FHWA's code |
TEMP_STRUCTURE_103 | A temporary structure |
HIGHWAY_SYSTEM_104 | On the National Highway System |
FEDERAL_LANDS_105 | Federal lands highway designation |
FEDERAL_LANDS_105 | The same, as FHWA's code |
YEAR_RECONSTRUCTED_106 | Year last reconstructed |
DECK_STRUCTURE_TYPE_107 | Deck structure type |
DECK_STRUCTURE_TYPE_107 | The same, as FHWA's code |
SURFACE_TYPE_108A | Wearing surface |
SURFACE_TYPE_108A | The same, as FHWA's code |
MEMBRANE_TYPE_108B | Deck membrane |
MEMBRANE_TYPE_108B | The same, as FHWA's code |
DECK_PROTECTION_108C | Deck protection |
DECK_PROTECTION_108C | The same, as FHWA's code |
PERCENT_ADT_TRUCK_109 | Trucks as a percent of average daily traffic |
NATIONAL_NETWORK_110 | On the national network for trucks |
PIER_PROTECTION_111 | Pier or abutment protection for navigation |
PIER_PROTECTION_111 | The same, as FHWA's code |
BRIDGE_LEN_IND_112 | Long enough to be an NBI bridge |
SCOUR_CRITICAL_113 | Scour status in words |
SCOUR_CRITICAL_113 | The same, as FHWA's code |
FUTURE_ADT_114 | Forecast average daily traffic |
YEAR_OF_FUTURE_ADT_115 | Year of the forecast |
MIN_NAV_CLR_MT_116 | Minimum navigation clearance of a lift bridge, meters |
FED_AGENCY | Reported by a federal agency |
SUBMITTED_BY | Who submitted the record: the state's FIPS code or a federal agency's owner code |
BRIDGE_CONDITION | Good, Fair or Poor |
BRIDGE_CONDITION | The same, as FHWA's code |
LOWEST_RATING | Lowest of the deck, superstructure, substructure and culvert ratings |
DECK_AREA | Deck area, square meters |
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- Building Permits by County · BPS
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