Highway Agency District
County (Parish) Code
Facility Carried by Structure
Inventory Route, Minimum Vertical Clearance
Base Highway Network
LRS Inventory Route, Subroute Number
Bypass, Detour Length
Functional Classification of Inventory Route
Lanes On and Under the Structure
Average Daily Traffic
Year of Average Daily Traffic
Approach Roadway Width
Traffic Safety Features
Navigation Vertical Clearance
Navigation Horizontal Clearance
Structure Open, Posted or Closed to Traffic
Type of Service
Structure Type, Main
Structure Type, Approach Spans
Number of Spans in Main Unit
Number of Approach Spans
Inventory Route, Total Horizontal Clearance
Length of Maximum Span
Curb or Sidewalk Widths
Bridge Roadway Width, Curb-to-Curb
Deck Width, Out-to-Out
Minimum Vertical Clearance Over Bridge Roadway
Minimum Vertical Underclearance
Minimum Lateral Underclearance on Right
Minimum Lateral Underclearance on Left
Deck Condition Rating
Superstructure Condition Ratings
Substructure Condition Ratings
Channel and Channel Protection
Culverts Condition Ratings
Method used to Determine Operating Rating
Method used to Determine Inventory Rating
Structural Evaluation Appraisal Ratings
Deck Geometry Appraisal Ratings
Underclearances, Vertical and Horizontal Appraisal Ratings
Waterway Adequacy Appraisal Ratings
Approach Roadway Alignment Appraisal Ratings
Type of Work
Length of Structure Improvement
Designated Inspection Frequency
Critical Feature Inspection
Critical Feature Inspection Date
Bridge Improvement Cost
Roadway Improvement Cost
Total Project Cost
Year of Improvement Cost Estimate
Border Bridge Structure Number
STRAHNET Highway Designation
Parallel Structure Designation
Direction of Traffic
Temporary Structure Designation
Highway System of the Inventory Route
Federal Lands Highways
Deck Structure Type
Wearing Surface/Protective System
Average Daily Truck Traffic
Designated National Network
Pier or Abutment Protection [for navigation]
NBIS Bridge Length
Scour Critical Bridges
Future Average Daily Traffic
Year of Future Average Daily Traffic
Minimum Navigation Vertical Clearance
NBI Elements > ITEM 1 - State Code: 2 - Digit FIPS only Code Description 01 Alabama 02 Alaska 04 Arizona 05 Arkansas 06 California 08 Colorado 09 Connecticut 10 Delaware 11 District of Columbia 12 Florida 13 Georgia 15 Hawaii 16 Idaho 17 Illinois 18 Indiana 19 Iowa 20 Kansas 21 Kentucky 22 Louisiana 23 Maine 24 Maryland 25 Massachusetts 26 Michigan 27 Minnesota 28 Mississippi 29 Missouri 30 Montana 31 Nebraska 32 Nevada 33 New Hampshire 34 New Jersey 35 New Mexico 36 New York 37 North Carolina 38 North Dakota 39 Ohio 40 Oklahoma 41 Oregon 42 Pennsylvania 44 Rhode Island 45 South Carolina 46 South Dakota 47 Tennessee 48 Texas 49 Utah 50 Vermont 51 Virginia 53 Washington 54 West Virginia 55 Wisconsin 56 Wyoming 60 American Samoa 66 Guam 69 Northern Marianas 72 Puerto Rico 78 Virgin Islands
NBI Elements > ITEM 2 - Highway Agency District The highway agency district (State or Federal) in which the bridge is located represented by a 2-digit code.
NBI Elements > ITEM 4 - Place Code Cities, towns, townships, villages, and other census-designated places identified using the FIPS codes given in the current version of the Census of Population and Housing - Geographic Identification Code Scheme.
NBI Elements > ITEM 5 - Inventory Route The inventory route is a 9-digit code composed of 5 segments. Length Segment Description 1 digit 5A Record Type 1 digit 5B Route Signing Prefix 1 digit 5C Designated level of service 5 digit 5D Route Number 1 digit 5E Directional Suffix
NBI Elements > ITEM 5A - Record Type There are 2 types of NBI records: "ON" and "UNDER". Code Description 1 Route carried "ON" the structure 2 Single route goes "UNDER" the sturcture A - Z Multiple routes go "UNDER" the structure 99 Miscoded data
NBI Elements > ITEM 5B - Record Signing Prefix Code Description 1 Interstate highway 2 U.S. numbered highway 3 State highway 4 County highway 5 City street 6 Federal lands road 7 State lands road 8 Other 99 Miscoded data
NBI Elements > ITEM 5C - Designated Level of Service Code Description 0 None of the below 1 Mainline 2 Alternate 3 Bypass 4 Spur 6 Business 7 Ramp, Wye, Connector, etc. 8 Service and/or unclassified frontage road 99 Miscoded data
NBI Elements > ITEM 5D - Route Number The route number of inventory route in 5 digits, right justified with leading zeros.
NBI Elements > ITEM 5E - Directional Suffix Code Description 0 N/A 1 North 2 East 3 South 4 West 99 Miscoded data
NBI Elements > ITEM 6A - Features Intersected / ITEM 6B - Critical Facility Indicator These items contain the description of the features intersected by the structure and a critical facility indicator( no longer coded ).
NBI Elements > ITEM 7 - Facility Carried by Structure The facility being carried by the structure. In all situations this item describes the use "on" the structure.
NBI Elements > ITEM 8 - Structure Number A 15 digit structure number unique for each bridge within the state.
NBI Elements > ITEM 9 - Location A narrative description of the bridge location.
NBI Elements > ITEM 10 - Inventory Route, Minimum Vertical Clearance The minimum vertical clearance over the inventory route identified in Item 5, whether the route is "on" the structure or "under" the structure. Measured in meters.
NBI Elements > ITEM 11 - Kilometerpoint The linear referencing system(LRS) kilometerpoint is used to establish the location of the bridge on the Base Highway Network(Item 12).
NBI Elements > ITEM 12 - Base Highway Network The Base Highway Network includes the through lane(mainline) portions of the NHS, rural/urban principal arterial system and rural minor arterial system. Ramps, frontage roads and other roadways are not included in the Base Network. Code Description 0 Inventory route is not on the Base Network 1 Inventory route is on the Base Network 99 Miscoded data
NBI Elements > ITEMS 13A, 13B - LRS Inventory Route, Subroute Number If Item 12 - Base Highway Network has been coded 1, the information to be recorded for this item is inventory route for the State's linear referencing system(LRS). If Item 12 has been coded 0, this entire item is left blank.
NBI Elements > ITEM 19 - Bypass, Detour Length The actual length to the nearest kilometer of the detour length. It is the total additional travel for a vehicle which would result from closing of the bridge.
NBI Elements > ITEM 20 - Toll Code Description 1 Toll bridge. Tolls are paid specifically to use the structure. 2 On toll road. The structure carries a toll road, i.e. tolls are paid to the facility, which includes both the highway and the structure. 3 On free road. The structure is toll-free and carries a toll-free highway. 4 On Interstate toll segment under Secretarial Agreement. Structure functions as a part of the toll segment. 5 Toll bridge is a segment under Secretarial Agreement. Structure is seperate agreement from highway segment. 99 Miscoded data
NBI Elements > ITEMS 21, 22 - Maintenance Responsibility / Owner Code Description 01 State Highway Agency 02 County Highway Agency 03 Town or Township Highway Agency 04 City or Municipal Highway Agency 11 State Park, Forest, or Reservation Agency 12 Local Park, Forest, or Reservation Agency 21 Other State Agencies 25 Other Local Agencies 26 Private (other than railroad) 27 Railroad 31 State Toll Authority 32 Local Toll Authority 60 Other Federal Agencies (not listed below) 61 Indian Tribal Government 62 Bureau of Indian Affairs 63 Bureau of Fish and Wildlife 64 U.S. Forest Service 66 National Park Service 67 Tennessee Valley Authority 68 Bureau of Land Management 69 Bureau of Reclamation 70 Corps of Engineers (Civil) 71 Corps of Engineers (Military) 72 Air Force 73 Navy/Marines 74 Army 75 NASA 76 Metropolitan Washington Airports Service 80 Unknown 99 Miscoded data
NBI Elements > ITEM 26 - Functional Classification of Inventory Route Code Description Rural 01 Principal Arterial - Interstate 02 Principal Arterial - Other 06 Minor Arterial 07 Major Collector 08 Minor Collector 09 Local Urban 11 Principal Arterial - Interstate 12 Principal Arterial - Other Freeways or Expressways 14 Other Principal Arterial 16 Minor Arterial 17 Collector 19 Local 99 Miscoded data
NBI Elements > ITEM 27 - Year Built Year of construction of the structure.
NBI Elements > ITEMS 28A, 28B - Lanes On and Under the Structure Number of lanes being carried by the structure and being crossed over by the structure.
NBI Elements > ITEM 29 - Average Daily Traffic Average daily traffic volume for the inventory route identified in Item 5.
NBI Elements > ITEM 30 - Year of Average Daily Traffic Year represented by the ADT(Item 29).
NBI Elements > ITEM 31 - Design Load Code Metric / English Description 1 M 9 / H 10 2 M 13.5 / H 15 3 MS 13.5 / HS 15 4 M 18 / H 20 5 MS 18 / HS 20 6 MS 18+Mod / HS 20+Mod 7 Pedestrian 8 Railroad 9 MS 22.5 / HS 25 0 Other or Unknown 99 Miscoded data
NBI Elements > ITEM 32 - Approach Roadway Width Normal width of usable roadway approaching the structure measured in meters.
NBI Elements > ITEM 33 - Bridge Median Code Description 0 No median 1 Open median 2 Closed median(no barriers) 3 Closed median with non-mountable barriers 99 Miscoded data
NBI Elements > ITEM 34 - Skew The skew angle is the angle between the centerline of a pier and a line normal to the roadway centerline. Major variation in skews of substructure units is indicated with 99.
NBI Elements > ITEM 35 - Structure Flared Flared = width of structure varies. Code Description 0 No flare 1 Yes, flared 99 Miscoded data
NBI Elements > ITEM 36 - Traffic Safety Features Bridge inspection shall include the recording of information on the following traffic safety features so that the evaluation of their adequacy can be made. Segment Description 36A Bridge railings 36B Transitions 36C Approach guardrail 36D Approach guardrail ends The reporting of these features shall be as follows: Code Description 0 Inspected feature does not meet currently acceptable stds. or a safety feature is required and none is provided.* 1 Inpected peature meets currently acceptable standards.* N Not applicable or a safety feature is not required.* 99 Miscoded data * For structures on the NHS, national standards are set by regulation. For those not on the NHS, it shall be the responsibility of the highway agency (state, county, local or federal) to set standards.
NBI Elements > ITEM 37 - Historical Significance Code Description 1 Bridge is on the National Register of Historic Places(NRHP). 2 Bridge is eligible for the NRHP. 3 Bridge is possibly eligible for the NRHP(requires further investigation before determination can be made) or bridge is on a State or local historic register. 4 Historical significance is not determinable at this time. 5 Bridge is not eligible for the NRHP. 99 Miscoded data
NBI Elements > ITEM 38 - Navigation Control Code Description N Not applicable, no waterway. 0 No navigation control on waterway(bridge permit not required). 1 Navigation control on waterway(bridge permit required). 99 Miscoded data
NBI Elements > ITEM 39 - Navigation Vertical Clearance If Item 38 - Navigation Control has been coded 1, clearance is the minimum vertical clearance imposed at the site as measured above a datum that is specified on a navigation permit issued by a control agency. Measured in meters.
NBI Elements > ITEM 40 - Navigation Horizontal Clearance If Item 38 - Navigation Control has been coded 1, clearance is the horizontal clearance imposed at the site that is shown on the navigation permit. Measured in meters.
NBI Elements > ITEM 41 - Structure Open, Posted or Closed to Traffic Code Description A Open, no restriction B Open, posting recommended but not legally implemented (all signs not in place or not correctly implemented) D Open, would be posted or closed except for temporary shoring, etc. to allow for unrestricted traffic E Open, temporary structure in place to carry legal loads while original structure is closed and awaiting replacement or rehabilitation G New structure not yet open to traffic K Bridge closed to all traffic P Posted for load (may include other restrictions such a temporary bridges which are load posted) R Posted for other load-capacity restriction (speed, number of vehicles on bridge, etc.) 99 Miscoded data
NBI Elements > ITEMS 42A, 42B - Type of Service On / Under bridge Type of Service On Bridge Code Description 1 Highway 2 Railroad 3 Pedestrian-bicycle 4 Highway-railroad 5 Highway-pedestrian 6 Overpass structure at an interchange or second level of a multilevel interchange 7 Third level (Interchange) 8 Fourth level (Interchange) 9 Building of plaza 0 Other 99 Miscoded data Type of Service under Bridge Code Description 1 Highway, with or without pedestrian 2 Railroad 3 Pedestrian-bicycle 4 Highway-railroad 5 Waterway 6 Highway-waterway 7 Railroad-waterway 8 Highway-waterway-railroad 9 Relief for waterway 0 Other 99 Miscoded data
NBI Elements > ITEMS 43A, 44A - Kind of material, Main / Approach Code Description 1 Concrete 2 Concrete continuous 3 Steel 4 Steel continuous 5 Prestressed concrete * 6 Prestressed concrete continuous * 7 Wood or timber 8 Masonry 9 Aluminum, Wrought Iron or Cast Iron 0** Other 99 Miscoded data * Post-tensioned concrete coded as prestressed concrete ** Not applicable for Item 44
NBI Elements > ITEMS 43B, 44B - Type of Design, Main / Approach Code Description 01 Slab 02 Stringer/Multi-beam or girder 03 Girder and floorbeam system 04 Tee beam 05 Box beam or girders - Multiple 06 Box Beam or girders - Single or Spread 07 Frame 08 Orthotropic 09 Truss - Deck 10 Truss - Thru 11 Arch - Deck 12 Arch - Thru 13 Suspension 14 Stayed girder 15 Movable - Lift 16 Movable - Bascule 17 Movable - Swing 18 Tunnel 19 Culvert 20* Mixed types 21 Segmental box girder 22 Channel beam 00** Other 99 Miscoded data * Applicable to only approach spans - Item 44. ** Not applicable for Item 44
NBI Elements > ITEM 45 - Number of Spans in Main Unit Number of spans in the main or major unit.
NBI Elements > ITEM 46 - Number of Approach Spans Number of spans in the approach spans to the major bridge, or the number of spans of material different from that of the major bridge.
NBI Elements > ITEM 47 - Inventory Route, Total Horizontal Clearance The total horizontal clearance for the inventory route identified in Item 5 measured in meters. It is the available clearance measured between the restrictive features -- curbs, rails, walls, piers or other structural features limiting the roadway (surface and shoulders). When the restriction is 100 meters or greater, code could be 999.
NBI Elements > ITEM 48 - Length of Maximum Span The length of maximum span. It shall be noted whether the measurement is center of bearing points or clear open distance between piers, bents or abutments. The measurement shall be along the centerline of the bridge. Measured in meters.
NBI Elements > ITEM 49 - Structure Length The length of the structure measured in meters. This shall be the length of roadway which is supported on the bridge structure. The length is measured back to back of backwalls of abutments or from paving notch to paving notch. Culvert lengths are measured along the center line of roadway regardless of their depth below grade. Measurement is made between inside faces of exterior walls. Tunnel length is measured along the centerline of the roadway.
NBI Elements > ITEMS 50A, 50B - Curb or Sidewalk Widths (Left / Right) The widths of the left and right curbs or sidewalks measured in meters. "Left" and "Right" is determined on the basis of direction of the inventory.
NBI Elements > ITEM 51 - Bridge Roadway Width, Curb-to-Curb The most restrictive minimum distance between curbs or rails on the structure roadway measured in meters.
NBI Elements > ITEM 52 - Deck Width, Out-to-Out The out-to-out width measured in meters.
NBI Elements > ITEM 53 - Minimum Vertical Clearance Over Bridge Roadway The actual minimum vertical clearance over the bridge roadway, including shoulders, to any superstructure restriction, measured in meters. When no superstructure restriction exists above the bridge roadway, or when a restriction is 30 meters or greater, indicated as 99.99.
NBI Elements > ITEM 54A - Minimum Vertical Underclearance - Reference feature The reference feature from which the clearance measurement is taken: Code Description H Highway beneath structure R Railroad beneath structure N Feature not a highway or railroad 99 Miscoded data
NBI Elements > ITEM 54B - Minimum Vertical Underclearance The minimum vertical clearance from the roadway(travel lanes only) or railroad track beneath the structure to the underside of the superstructure. Measured in meters.
NBI Elements > ITEM 55A - Minimum Lateral Underclearance - Reference feature The reference feature from which the clearance measurement is taken: Code Description H Highway beneath structure R Railroad beneath structure N Feature not a highway or railroad 99 Miscoded data
NBI Elements > ITEM 55B - Minimum Lateral Underclearance on Right The minimum lateral underclearance on the right measured in meters.
NBI Elements > ITEM 56 - Minimum Lateral Underclearance on Left The minimum lateral underclearance on the left measured in meters.
NBI Elements > ITEMS 58, 59, 60 - Condition ratings: Deck, Superstructure, Substructure Code Description N NOT APPLICABLE 9 EXCELLENT CONDITION 8 VERY GOOD CONDITION - no problems noted. 7 GOOD CONDITION - some minor problems. 6 SATISFACTORY CONDITION - structural elements show some minor deterioration. 5 FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling or scour. 4 POOR CONDITION - advanced section loss, deterioration, spalling or scour. 3 SERIOUS CONDITION - loss of section, deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present. 2 CRITICAL CONDITION - advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken. 1 "IMMINANT" FAILURE CONDITION - major deterioration or section loss present in critical sructural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put it back in light service. 0 FAILED CONDITION - out of service; beyond corrective action. 99 Miscoded data
NBI Elements > ITEM 61 - Channel and Channel Protection Code Description N Not applicable. 9 There are no noticeable or noteworthy deficiencies which affect the condition of the channel. 8 Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. 7 Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. 6 Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. 5 Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and brush restrict the channel. 4 Bank and embankment protection is severely undermined. River control devices have severe damage. Large deposits of debris are in the channel. 3 Bank protection has failed. River control devices have been destroyed. Stream bed aggradation, degradation or lateral movement has changed the channel to now threaten the bridge and/or approach roadway. 2 The channel has changed to the extent the bridge is near a state of collapse. 1 Bridge closed because of channel failure. Corrective action may put back in light service. 0 Bridge closed because of channel failure. Replacement necessary. 99 Miscoded data
NBI Elements > ITEM 62 - Culverts Code Description N Not applicable. Used if structure is not a culvert. 9 No defeciencies 8 No noticeable or noteworthy deficiencies which affect the condition of the culvert. Insignificant scrape marks caused by drift. 7 Shrinkage cracks, light scaling and insignificant spalling which does not expose reinforcing steel. Insignificant damage caused by drift with no misalignment and not requiring corrective action. Some minor scouring has occured near curtain walls, wingwalls or pipes. Metal culverts have a smooth symmetrical curvature with superficial corrosion and no pitting. 6 Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete or masonry walls and slabs. Local minor scouring at curtain walls, wingwalls or pipes. Metal culverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting. 5 Moderate to major deterioration or disintegration, extensive cracking and leaching or spalls on concrete or masonry walls and slabs. Minor settlement or misalignment. Noticeable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection in one section, significant corrosion or deep pitting. 4 Large spalls, heavy scaling, wide cracks, considerable efflorescence or opened construction joint permitting loss of backfill. Considerable settlement or misalignment. Considerable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection throughout, extensive corrosion or deep pitting. 3 Any condition described in Code 4 but which is excessive in scope. Severe movement or differential setlement of the segments or loss of fill. Holes may exist in walls or slabs. Integral wingwalls nearly severed from culvert. Severe scour or erosion at curtain walls, wingwalls or pipes. Metal culverts have extreme distortion and delection in one section, extensive corrosion, or deep pitting with scattered perforations. 2 Integral wingwalls collapsed, severe settlement of roadway due to loss of fill. Section of culvert may have failed and can no longer support embankment. Complete undrmining at curtain walls and pipes. Corrective action required to maintain traffic. Metal culverts have extreme distortion and deflection and deflection throughout with extensive perforations due to corrosion. 1 Bridge closed. Corrective action may put back in light service. 0 Bridge closed. Replacement necessary. 99 Miscoded data
NBI Elements > ITEMS 63, 65 - Method Used to Determine: Operating Rating / Inventory Rating Code Description 1 Load Factor(LF) 2 Allowable Stress(AS) 3 Load and Resistance Factor(LRFR) 4 Load Testing 5 No rating analysis performed 99 Miscoded data
NBI Elements > ITEM 64 - Operating Rating This capacity rating referred to as the operating rating, will result in the absolute maximum permissible load level to which the structure may be subjected for the vehicle type used in the rating. Represents the total mass of the entire vehicle measured in metric tons. If the bridge will not carry a minimum of 2.7 metric tons of live load, the operating rating is 0 metric tons.
NBI Elements > ITEM 66 - Inventory Rating This capacity rating referred to as the inventory rating, will result in a load level which can safely utilize an existing structure for an indefinite period of time. Coded as '999' for a structure under sufficient fill such that, according to AASHTO design, the live load is insignificant in the structure load capacity.
NBI Elements > ITEMS 67, 68, 69, 71, 72 - Appraisal ratings - Structural Evaluation - Deck Geometry - Underclearances, Vertical and Horizontal - Water Adequacy - Approach Roadway Alignment Code Description N N/A 9 Superior to present desirable criteria 8 Equal to present desirable criteria 7 Better than present minimum criteria 6 Equal to present minimum criteria 5 Somewhat better than minimum adequacy to tolerate being left in place as is 4 Meets minimum tolerable limits to be left in place as is 3 Basically intolerable requiring high priority of corrrective action 2 Basically intolerable requiring high priority of replacement 1 This value of rating code not used 0 Bridge closed 99 Miscoded data
NBI Elements > ITEMS 70 - Bridge Posting Code Description 5 Equal to or above legal loads 4 00.1 - 09.9 % below 3 10.0 - 19.9 % below 2 20.0 - 29.9 % below 1 30.0 - 39.9 % below 0 > 39.9% below 99 Miscoded data
NBI Elements > ITEM 75A - Type of Work Code Description 31 Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. 32 Replacement of bridge or other structure because of relocation of road. 33 Widening of existing bridge or other major structure without deck rehabilitation or replacement; includes culvert lengthening. 34 Widening of existing bridge with deck rehabilitation or replacement. 35 Bridge rehabilitation because of general structure deterioration or inadequate strength. 36 Bridge deck rehabilitation with only incidental widening. 37 Bridge deck replacement with only incidental widening. 38 Other structural work, including hydraulic replacements. 99 Miscoded data
NBI Elements > ITEM 75B - Work Done By Code Description 1 Work to be done by contract 2 Work to be done by owner's forces 99 Miscoded data
NBI Elements > ITEM 76 - Length of Structure Improvement This is the length of the proposed bridge improvement measured in meters.
NBI Elements > ITEM 90 - Inspection Date This is the month(2-digits) and year(4-digits) of the last routine inspection of the structure performed.
NBI Elements > ITEM 91 - Designated Inspection Frequency This is the number of months between designated inspections of the structure.
NBI Elements > ITEMS 92A, 92B, 92C - Critical Feature Inspection - Fracture Critical Details - Underwater Inspection - Other Special Inspection 1st digit Code Description Y Special inspection or emphasis needed N Not needed 2nd and 3rd digit 2 - digit number to indicate the number of months between inspections only if the first digit is coded 'Y'.
NBI Elements > ITEMS 93A, 93B, 93C - Critical Feature Inspection Date If the first digit of Item 92 is coded 'Y' then the first 2 - digits represent the month and last 2 - digits represent the year that the last inspection of the denoted critical feature was performed.
NBI Elements > ITEM 94 - Bridge Improvement Cost Estimated cost of the proposed bridge or major structure improvements in thousands of dollars. This cost shall include only bridge construction costs, excluding roadway, right of way, detour, demolition, prelimnary engineering, etc.
NBI Elements > ITEM 95 - Roadway Improvement Cost Estimated cost of the proposed roadway improvement in thousands of dollars. This shall include only roadway construction costs, excluding bridge, right-of-way, detour, extensive roadway realignment costs, preliminary engineering, etc.
NBI Elements > ITEM 96 - Total Project Cost Estimated total project costs associated with the proposed bridge improvement project in thousands of dollars, including incidental costs not included in Items 94 and 95. The total project cost will therefore be greater than the sum of Items 94 and 95.
NBI Elements > ITEM 97 - Year of Improvement Cost Estimate The 4 - digit year that the costs of work estimated in Items 94, 95 and 96 were based upon.
NBI Elements > ITEM 98 - Border Bridge This item indicates structures crossing borders of States. Segment Description 98A Neighboring State Code[ 3 digits ] 98B Percent Responsibility*[ 2 digits ] * - Percentage of total deck area of the existing bridge that the neighboring State is responsible for funding. If the structure is not on a border, left blank.
NBI Elements > ITEM 99 - Border Bridge Structure Number This item indicates neighboring State's 15-Digit NBI structure number for any structure noted in Item 98. Blank if Item 98 is blank.
NBI Elements > ITEM 100 - STRAHNET Highway Designation Code Description 1 The inventory route is not a STRAHNET route. 2 The inventory route is on a Interstate STRAHNET route. 3 The inventory route is on a Non-Interstate STRAHNET route. 4 The inventory route is on a STRAHNET connector route. 99 Miscoded data
NBI Elements > ITEM 101 - Parallel Structure Designation Code Description R The right structure of parallel bridges carrying the roadway in the direction of the inventory. ( For a STRAHNET highway, this is west to east and south to north. ) L The left structure of parallel bridges. This structure carries traffic in the opposite direction. N No parallel structure exists. 99 Miscoded data
NBI Elements > ITEM 102 - Direction of Traffic Code Description 0 Highway traffic not carried 1 1 - way traffic 2 2 - way traffic 3 One lane bridge for 2 - way traffic 99 Miscoded data
NBI Elements > ITEM 103 - Temporary Structure Designation Code Description T Temporary structure(s) or conditions exist. 99 Miscoded data Blank if not applicable.
NBI Elements > ITEM 104 - Highway System of the Inventory Route Code Description 0 Inventory Route is not on the NHS. 1 Inventory Route is on the NHS. 99 Miscoded data
NBI Elements > ITEM 105 - Federal Lands Highway Code Description 0 N/A 1 Indian Reservation Road (IRR) 2 Forest Highway (FH) 3 Land Management Highway System (LMHS) 4 Both IRR and FH 5 Both IRR and LMHS 6 Both FH and LMHS 9 Combined IRR, FH and LMHS 99 Miscoded data
NBI Elements > ITEM 106 - Year Reconstructed 4 - digit year of most recent reconstruction of the structure. If there has been no reconstruction, year is 0.
NBI Elements > ITEM 107 - Deck Structure Type Code Description 1 Concrete Cast-in-Place 2 Concrete Precast Panels 3 Open Grating 4 Closed Grating 5 Steel plate (includes orthotropic) 6 Corrugated Steel 7 Aluminum 8 Wood or Timber 9 Other N Not applicable 99 Miscoded data
NBI Elements > ITEM 108 - Wearing Surface/Protective System Information on the wearing surface and protective system of the bridge deck is composed of 3 segments. Length Segment Description 1 digit 108A Type of Wearing Surface 1 digit 108B Type of Membrane 1 digit 108C Deck Protection
NBI Elements > ITEM 108A - Type of Wearing Surface Code Description 1 Monolithic Concrete (concurrently placed with structural deck) 2 Integral Concrete (separate non-modified layer of concrete added to structural deck) 3 Latex Concrete or similar additive 4 Low slump Concrete 5 Epoxy Overlay 6 Bituminous 7 Wood or Timber 8 Gravel 9 Other 0 None (no additional concrete thickness or wearing surface is included in the bridge deck) N Not applicable (applies only to structures with no deck) 99 Miscoded data
NBI Elements > ITEM 108B - Type of Membrane Code Description 1 Built-up 2 Preformed Fabric 3 Epoxy 8 Unknown 9 Other 0 None N Not applicable (applies only to structures with no deck) 99 Miscoded data
NBI Elements > ITEM 108C - Deck Protection Code Description 1 Epoxy Coated Reinforcing 2 Galvanized Reinforcing 3 Other Coated Reinforcing 4 Cathodic Protected 6 Polymer Impregnated 7 Internally Sealed 8 Unknown 9 Other 0 None N Not applicable (applies only to structures with no deck) 99 Miscoded data
NBI Elements > ITEM 109 - Average Daily Truck Traffic The percentage that shows the percentage of Item 29 - Average Daily Traffic that is truck Trafic.
NBI Elements > ITEM 110 - Designated National Network Code Description 0 The inventory route is not part of the national network for trucks. 1 The inventory route is part of the national network for trucks. 99 Miscoded data
NBI Elements > ITEM 111 - Pier or Abutment Protection Code Description 1 Navigation protection not required 2 In place and functioning 3 In place but in a deteriorated condition 4 In place but re-evaluation of design suggested 5 None present but re-evaluation suggested 99 Miscoded data
NBI Elements > ITEM 112 - NBIS Bridge Length Does this structure meet or exceed the minimum length specified to be designated as a bridge for National Bridge Inspection Standards purposes? Code Description Y Yes N No 99 Miscoded data
NBI Elements > ITEM 113 - Scour Critical Bridges Code Description N Bridge not over waterway. U Bridge with "unknown" foundation that has not been evaluated for scour. Until risk can be determined, a plan of action should be developed and implemented to reduce the risk to users from abridge failure during and immediately after a flood event (see HEC 23). T Bridge over "tidal" waters that has not been evaluated for scour, but considered low risk. Bridge will be monitored with regular inspection cycle and with appropriate underwater inspections until an evaluation is performed ("Unknown" foundations in "tidal" waters should be coded U.) 9 Bridge foundations (including piles) on dry land well above flood water elevations. 8 Bridge foundations determined to be stable for the assessed or calculated scour condition. Scour is determined to be above top of footing (Example A) by assessment (i.e., bridge foundations are on rock formations that have been determined to resist scour within the service life of the bridge4), by calculation or by installation of properly designed countermeasures (see HEC 23). 7 Countermeasures have been installed to mitigate an existing problem with scour and to reduce the risk of bridge failure during a flood event. Instructions contained in a plan of action have been implemented to reduce the risk to users from a bridge failure during or immediately after a flood event. 6 Scour calculation/evaluation has not been made. (Use only to describe case where bridge has not yet been evaluated for scour potential.) 5 Bridge foundations determined to be stable for assessed or calculated scour condition. Scour is determined to be within the limits of footing or piles (Example B) by assessment (i.e.,bridge foundations are on rock formations that have been determined to resist scour within the service life of the bridge), by calculations or by installation of properly designed countermeasures (see HEC 23). 4 Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required to protect exposed foundations (see HEC 23). 3 Bridge is scour critical; bridge foundations determined to be unstable for assessed or calculated scour conditions: - Scour within limits of footing or piles. (Example B) - Scour below spread-footing base or pile tips. (Example C) 2 Bridge is scour critical; field review indicates that extensive scour has occurred at bridge foundations, which are determined to be unstable by: - a comparison of calculated scour and observed scour during the bridge inspection, or - an engineering evaluation of the observed scour condition reported by the bridge inspector in Item 60. 1 Bridge is scour critical; field review indicates that failure of piers/abutments is imminent. Bridge is closed to traffic. Failure is imminent based on: - a comparison of calculated and observed scour during the bridge inspection, or - an engineering evaluation of the observed scour condition reported by the bridge inspector in Item 60. 0 Bridge is scour critical. Bridge has failed and is closed to traffic. 99 Miscoded data
NBI Elements > ITEM 114 - Future Average Daily Traffic The forecasted average daily traffic(ADT) for the inventory route identfied in Item 5.
NBI Elements > ITEM 115 - Year of Future Average Daily Traffic Year represented by the future ADT in Item 114.
NBI Elements > ITEM 116 - Minimum Navigation Vertical Clearance, Vertical Lift Bridge The minimum vertical clearance imposed at the site as measured above a datum that is specified on a navigation permit issued by a control agency. Measured in meters.
NBI Elements > Deck area This is Deck width( ITEM 52 ) times Structure length( ITEM 49 ) or ITEM_52 x ITEM_49.
NBI Elements > FIPS The first 2 digits are the Federal Information Processing Standards (FIPS) code for Item 1, and the last 3 digits are the code for Item 3.
NBI Elements > Status Code Description 0 Not defecient 1 Structurally defecient 2 Functionally obsolete N Not applicable
NBI Elements > Sufficiency rating The sufficiency is a method of evaluating highway bridge data by calculating four separate factors to obtain a numeric value which is indicative of bridge sufficiency to remain in service. The result of this method is a percentage in which 100 percent would represent a entirely sufficient bridge and zero percent would represent an entirely insufficient or deficient bridge.
NBI Elements > Structurally defecient(SD) & Functionally obsolete(FO) Criteria Below are the definitions for SD criteria and FO criteria in this application. It must be noted that, based on the criteria used, a bridge could be both structurally deficient and functionally obsolete. The status field however provides the option of running a query in which a bridge designated as functionally obsolete is not structurally deficient. In other words functionally obsolete bridges are exclusive of structurally deficient bridges. Also, the status field definition of bridge deficiencies is limited only to those bridges which are 10 years or older and are more than 20 feet in length. Definition of SD criteria SD(Structurally deficient) criteria are defined as bridges that meet at least one of the following qualifications: 1. ITEM 58 coded 0, 1, 2, 3 or 4; or 2. ITEM 59 coded 0, 1, 2, 3 or 4; or 3. ITEM 60 coded 0, 1, 2, 3 or 4; or 4. ITEM 62 coded 0, 1, 2, 3 or 4; and the last two digits of ITEM 43 are coded 19; or 5. ITEM 67 coded 0, 1 or 2; or 6. ITEM 71 coded 0, 1 or 2 and the last digit of ITEM 42 coded 0, 5, 6, 7, 8 or 9. Definition of FO criteria FO(Functionally Obsolete) criteria are defined as bridges that meet at least one of the following qualifications: 1. ITEM 68 coded 0, 1, 2 or 3; or 2. ITEM 69 coded 0, 1, 2 or 3 and the last digit of ITEM 42 coded 0, 1, 2, 4, 6, 7 or 8; or 3. ITEM 72 coded 0, 1, 2 or 3; or 4. ITEM 67 coded 3; or 5. ITEM 71 coded 3 and the last digit of ITEM 42 coded 0, 5, 6, 7, 8 or 9.