Item # Description
1 State Code
2 Highway Agency District
3 County (Parish) Code
4 Place Code
5 Inventory Route
6 Features Intersected
7 Facility Carried by Structure
8 Structure Number
9 Location
10 Inventory Route, Minimum Vertical Clearance
11 Kilometer Point
12 Base Highway Network
13 LRS Inventory Route, Subroute Number
19 Bypass, Detour Length
20 Toll
21 Maintenance Responsibility
22 Owner
26 Functional Classification of Inventory Route
27 Year Built
28 Lanes On and Under the Structure
29 Average Daily Traffic
30 Year of Average Daily Traffic
31 Design Load
32 Approach Roadway Width
33 Bridge Median
34 Skew
35 Structure Flared
36 Traffic Safety Features
37 Historical Significance
38 Navigation Control
39 Navigation Vertical Clearance
40 Navigation Horizontal Clearance
41 Structure Open, Posted or Closed to Traffic
42 Type of Service
43 Structure Type, Main
44 Structure Type, Approach Spans
45 Number of Spans in Main Unit
46 Number of Approach Spans
47 Inventory Route, Total Horizontal Clearance
48 Length of Maximum Span
49 Structure Length
50 Curb or Sidewalk Widths
51 Bridge Roadway Width, Curb-to-Curb
52 Deck Width, Out-to-Out
53 Minimum Vertical Clearance Over Bridge Roadway
54 Minimum Vertical Underclearance
Item # Description
55 Minimum Lateral Underclearance on Right
56 Minimum Lateral Underclearance on Left
58 Deck Condition Rating
59 Superstructure Condition Ratings
60 Substructure Condition Ratings
61 Channel and Channel Protection
62 Culverts Condition Ratings
63 Method used to Determine Operating Rating
64 Operating Rating
65 Method used to Determine Inventory Rating
66 Inventory Rating
67 Structural Evaluation Appraisal Ratings
68 Deck Geometry Appraisal Ratings
69 Underclearances, Vertical & Horizontal Appraisal Rating
70 Bridge Posting
71 Waterway Adequacy Appraisal Ratings
72 Approach Roadway Alignment Appraisal Ratings
75 Type of Work
76 Length of Structure Improvement
90 Inspection Date
91 Designated Inspection Frequency
92 Critical Feature Inspection
93 Critical Feature Inspection Date
94 Bridge Improvement Cost
95 Roadway Improvement Cost
96 Total Project Cost
97 Year of Improvement Cost Estimate
98 Border Bridge
99 Border Bridge Structure Number
100 STRAHNET Highway Designation
101 Parallel Structure Designation
102 Direction of Traffic
103 Temporary Structure Designation
104 Highway System of the Inventory Route
105 Federal Lands Highways
106 Year Reconstructed
107 Deck Structure Type
108 Wearing Surface/Protective System
109 Average Daily Truck Traffic
110 Designated National Network
111 Pier or Abutment Protection [for navigation]
112 NBIS Bridge Length
113 Scour Critical Bridges
114 Future Average Daily Traffic
115 Year of Future Average Daily Traffic
116 Minimum Navigation Vertical Clearance
ITEM 1 - State Code: 2 - Digit FIPS only
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
ITEM 2 - Highway Agency District
The highway agency district (State or Federal) in which the bridge is located represented by a 2-digit code.
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.
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
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 structure
A - Z Multiple routes go "UNDER" the structure
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
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
ITEM 5D - Route Number
The route number of inventory route in 5 digits, right justified with leading zeros.
ITEM 5E - Directional Suffix
Code Description
0 N/A
1 North
2 East
3 South
4 West
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 ).
ITEM 7 - Facility Carried by Structure
The facility being carried by the structure. In all situations, this item describes the use "on" the structure.
ITEM 8 - Structure Number
A 15 digit structure number unique for each bridge within the stat
ITEM 9 - Location
A narrative description of the bridge location.
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.
ITEM 11 - Kilometerpoint
The linear referencing system(LRS) kilometer point is used to establish the location of the bridge on the Base Highway Network(Item 12).
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
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.
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 the closing of the bridge.
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 apart of the toll segment.
5 Toll bridge is a segment under Secretarial Agreement. The structure is seperate agreement from highway segment.
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
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
ITEM 27 - Year Built
Year of construction of the structure.
ITEMS 28A, 28B - Lanes On and Under the Structure
Number of lanes being carried by the structure and being crossed over by the structure.
ITEM 29 - Average Daily Traffic
Average daily traffic volume for the inventory route identified in Item 5.
ITEM 30 - Year of Average Daily Traffic
Year represented by the ADT(Item 29).
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
ITEM 32 - Approach Roadway Width
Normal width of usable roadway approaching the structure measured in meters.
ITEM 33 - Bridge Median
Code Description
0 No median
1 Open median
2 Closed median(no barriers)
3 Closed median with non-mountable barriers
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.
ITEM 35 - Structure Flared
Flared = width of structure varies.
Code Description
0 No flare
1 Yes, flared
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.*
* 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.
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.
ITEM 38 - Navigation Control
Code Description
N Not applicable, no waterway.
0 No navigation controlonwaterway(bridge permit not required).
1 Navigation controlonwaterway(bridge permit required).
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.
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.
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 whileoriginal structure is closed and awaiting replacement or rehabilitation
G New structure not yet open to traffic
K Bridge closed to all traffic
P Posted forload (may include other restrictions such a temporary bridges which are load posted)
R Posted for other load-capacity restriction (speed, number of vehicles onbridge, etc.)
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
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
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
* Post-tensioned concrete coded as prestressed concrete
** Not applicable for Item 44
ITEMS 43B, 44B - Type of Design, Main / Approach
Code Description
01 Slab
02 Stringer/Multi-beam or girder
03 Girder andfloorbeam 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
* Applicable to only approach spans - Item 44.
** Not applicable for Item 44
ITEM 45 - Number of Spans in Main Unit
Number of spans in the main or major unit.
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.
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.
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.
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 ofbackwalls 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.
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.
ITEM 51 - Bridge Roadway Width, Curb-to-Curb
The most restrictive minimum distance between curbs or rails on the structure roadway measured in meters.
ITEM 52 - Deck Width, Out-to-Out
The out-to-out width measured in meters.
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.
ITEM 54A - Minimum Vertical Underclearance - Reference feature
The reference feature from which the clearance measurement is taken:
Code Description
H Highway beneathstructure
R Railroad beneathstructure
N Feature not a highway or railroad
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.
ITEM 55A - Minimum Lateral Underclearance - Reference feature
The reference feature from which the clearance measurement is taken:
Code Description
H Highway beneathstructure
R Railroad beneathstructure
N Feature not a highway or railroad
ITEM 55B - Minimum Lateral Underclearance on Right
The minimum lateral underclearance on the right measured in meters.
ITEM 56 - Minimum Lateral Underclearance on Left
The minimum lateral underclearance on the left measured in meters.
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 structural 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.
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 thechannel 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.
ITEM 62 - Culverts
Code Description
N Not applicable. Used ifstructure 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.
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
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.
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.
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
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
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.
ITEM 75B - Work Done By
Code Description
1 Work to be done by contract
2 Work to be done by owner's forces
ITEM 76 - Length of Structure Improvement
This is the length of the proposed bridge improvement measured in meters.
ITEM 90 - Inspection Date
This is the month(2-digits) and year(4-digits) of the last routine inspection of the structure performed.
ITEM 91 - Designated Inspection Frequency
This is the number of months between designated inspections of the structure.
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'.
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.
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.
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.
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.
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.
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.
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.
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
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.
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
ITEM 103 - Temporary Structure Designation
Code Description
T Temporary structure(s) or conditions exist.
Blank if not applicable.
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.
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
ITEM 106 - Year Reconstructed
4 - digit year of most recent reconstruction of the structure. If there has been no reconstruction, year is 0.
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
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
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)
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)
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)
ITEM 109 - Average Daily Truck Traffic
The percentage that shows the percentage of Item 29 - Average Daily Traffic that is truck Trafic.
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.
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
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
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 foundation,
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.
ITEM 114 - Future Average Daily Traffic
The forecasted average daily traffic(ADT) for the inventory route identfied in Item 5 .
ITEM 115 - Year of Future Average Daily Traffic
Year represented by the future ADT in Item 114.
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.
Deck area
This is Deck width( ITEM 52 ) times Structure length( ITEM 49 ) or ITEM_52 x ITEM_49.
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.
Status
Code Description
0 Not defecient
1 Structurally defecient
2 Functionally obsolete
N Not applicable
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.
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.