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The official Kentucky Transportation Cabinet (KYTC) bridge identification number. The Bridge ID uniquely identifies the bridge from all other Kentucky structures.
Not Deficient: A Bridge that is neither structurally deficient nor functionally obsolete.
Structurally Deficient: A bridge that is structurally deficient is not necessarily unsafe.
This category indicates the bridge has elements that need to be repaired and/or monitored.
A structurally deficient bridge should be maintained, inspected and monitored on a regular basis.
Functionally obsolete: A bridge that is functionally obsolete is not necessarily unsafe.
This category indicates the bridge has older design features not built to today's standards.
A functionally obsolete bridge is likely not wide enough or tall enough to accommodate current vehicle sizes,
weights and traffic volumes.
The Sufficiency Rating is calculated from a complex formula (developed by the FHWA) using 18 data items from the Structural Inventory and Appraisal (SI&A). A number (or rating) is generated from 0 to 100 indicating the bridge's structural and functional condition. The 100 possible points are allocated as follows: 55 points for "Structural Adequacy and Safety", 30 points are for "Serviceability and Functional Obsolescence", and 15 points for "Essentiality for Public Use".
Condition ratings are ratings assigned by the bridge inspector and consist of a one digit code from 0 to 9. A rating of "9" indicates an "Excellent Condition" and a rating of "0" indicates a "Failed Condition". These ratings are used to describe the existing, in-place bridge condition as compared to the as-built bridge condition. Condition ratings are assigned to the deck, superstructure, and substructure components of a bridge. Condition ratings are also assigned to the channel/channel protection and culverts where applicable.
Appraisal ratings are used to evaluate a bridge in relation to the level of service which it provides on the highway system of
which it is a part. The existing structure is compared to a new one which is built to current standards for that particular type of
road.
Kentucky bridge components are rated on a 0 to 9 rating scale according to the FHWA "Recording and Coding Guide for the Structural Inventory and Appraisal of the Nation's Bridges". Inspectors give a rating to each of a bridge's primary elements: deck, superstructure and substructure. Inspectors also rate the channel/channel protection and the structure as a culvert if applicable.
Deck: The portion of the bridge that directly carries traffic. Superstructure: The portion of the bridge that supports the deck and the weight of the vehicular traffic on the deck.
It also connects one substructure element to another. Substructure: The portion of the bridge that supports the superstructure and distributes all bridge loads to the ground.
SATISFACTORY CONDITION - structural elements show minor deterioration.
5
FAIR CONDITION - all primary structural elements are sound but may have minor corrosion, cracking or chipping. May include minor erosion on bridge piers.
4
POOR CONDITION - advanced corrosion, deterioration, cracking or chipping. Also significant erosion of concrete bridge piers.
3
SERIOUS CONDITION - corrosion, deterioration, cracking and chipping, or erosion of concrete bridge piers have seriously affected deck, superstructure, or substructure. Local failures are possible.
2
CRITICAL CONDITION - advanced deterioration of deck, superstructure, or substructure. May have cracks in steel or concrete, or erosion may have removed substructure support. It may be necessary to close the bridge until corrective action is taken.
1
"IMMINENT" FAILURE CONDITION - major deterioration or corrosion in deck, superstructure, or substructure, or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in light service.
0
FAILED CONDITION - out of service - beyond corrective action.
Channel: A channel is a well-defined depression which directs stream flow during non-flood conditions. The channel will consist of a streambed, embankments and a stream flow.
Channel Protection: A man-made or man-placed device to direct stream flow, protect the bank from erosion and/or protect the bridge substructure from scour.
Channel and Channel Protection Elements are rated on a 0 to 9 rating scale according to the FHWA "Recording and Coding Guide for the Structural Inventory and Appraisal of the Nation's Bridges". Inspectors give a rating to each of a bridge's primary elements: deck, superstructure and substructure. Inspectors also rate the channel/channel protection and the structure as a culvert if applicable.
EXCELLENT CONDITION - There are no noticeable or noteworthy deficiencies which affect the condition of the channel.
8
VERY GOOD CONDITION - 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
GOOD CONDITION - 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
SATISFACTORY CONDITION - 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
FAIR CONDITION - Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and brush restrict the channel.
4
POOR CONDITION - Bank and embankment protection is severely undermined. River control devices have severe damage. Large deposits of debris are in the channel.
3
SERIOUS CONDITION - 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
CRITICAL CONDITION - The channel has changed to the extent the bridge is near a state of collapse.
1
"IMMINENT" FAILURE CONDITION - Bridge closed because of channel failure. Corrective action may put back in light service.
0
FAILED CONDITION - Bridge closed because of channel failure. Replacement necessary.
N
Not applicable. Use when bridge is not over a waterway (channel).
Culvert: A culvert is a hydraulic structure typically under fill (covered with embankment material). Culverts have no definite distinction between superstructure and substructure elements, and they have no deck.
Kentucky culverts are rated on a 0 to 9 rating scale according to the FHWA "Recording and Coding Guide for the Structural Inventory and Appraisal of the Nation's Bridges". Inspectors give a rating to each of a bridge's primary elements: deck, superstructure and substructure. Inspectors also rate the channel/channel protection and the structure as a culvert if applicable.
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 occurred 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 settlement 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 deflection 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 undermining at curtain walls and pipes. Corrective action required to maintain traffic. Metal culverts have extreme distortion 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.
N
NOT APPLICABLE - Use if structure is not a culvert.
Structural Evaluation, Deck Geometry, and Underclearance appraisal ratings are calculated values generated from the Federal Highway Administration's (FHWA) Edit/Update program. The program generates a numeric code using a 0-9 rating scale.
The structural evaluation code is based on the inventory load rating, average daily traffic (ADT), deck condition rating, superstructure condition rating and culvert condition rating.
Structural Evaluation, Deck Geometry, and Underclearance appraisal ratings are calculated values generated from the Federal Highway Administration's (FHWA) Edit/Update program. The program generates a numeric code using a 0-9 rating scale.
The deck geometry code is based on the curb-to-curb bridge roadway width, number of lanes, one-way or two-way traffic, functional classification, minimum vertical clearance over bridge roadway, and average daily traffic (ADT).
Structural Evaluation, Deck Geometry, and Underclearance appraisal ratings are calculated values generated from the Federal Highway Administration's (FHWA) Edit/Update program. The program generates a numeric code using a 0-9 rating scale.
The Underclearance code is based on the minimum vertical underclearance, minimum horizontal underclearance, and functional classification of the route under the bridge.
Waterway adequacy and Approach Roadway Alignment appraisal ratings are assigned by the bridge inspector. The inspector will assign a code using a 0-9 rating scale.
The Waterway Adequacy code is based on the ability of the bridge to properly handle the amount of water that will travel under it. Overtopping of the road is an indication that the waterway opening is not adequate to handle the volume of water that is present.
Waterway adequacy and Approach Roadway Alignment appraisal ratings are assigned by the bridge inspector. The inspector will assign a code using a 0-9 rating scale.
The approach roadway alignment code is based on whether or not a vehicle will need to slow down in order to cross the bridge based on vertical or horizontal curvature of the approach roadway. The following guidelines are used:
If no reduction in speed is required then the code should be an 8
If a minor reduction in speed is required then the code should be an 6
If a substantial reduction in speed is required then the code should be an 3
The remaining codes between these general values should be applied at the inspector's discretion.
