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The Kentucky Transportation Cabinet (KYTC) inventories and inspects over 14,000 bridges in accordance with the National Bridge Inspection Standards National Bridge Inspection Standards (NBIS): Federal regulations establishing requirements for inspection procedures, frequency of inspections, qualifications of personnel, inspection reports, and preparation and maintenance of Kentucky's bridge inventory. The NBIS apply to all structures defined as a bridge and located on a public road. (NBIS). Over 250 data items are collected and maintained on each bridge. A portion of this data is referred to as the National Bridge Inventory (NBI) National Bridge Inventory (NBI): The total of all Structure Inventory and Appraisal (SI&A) data collected to fulfill the requirements of the National Bridge Inspection Standards (NBIS). The SI&A data is used in part to calculate the sufficiency rating and deficient status (not deficient, functionally obsolete, or structurally deficient) of the bridge, which determines the eligibility of the bridge for Highway Bridge Replacement and Rehabilitation Program (HBRRP) funds. and reported annually to the Federal Highway Administration (FHWA). Kentucky bridge maintenance activities are funded through state road funds State Road Funds: State road funds are receipts from motor vehicle usage tax, vehicle and boat registration, motor vehicle operator's licenses, motor fuels tax, tolls and interest. State road funds are used for road construction, maintenance, operations, engineering, planning and research. The Bridge Maintenance Branch (Division of Maintenance/Department of Highways) receives 20 to 24 million dollars annually from the State Road Fund. and the FHWA Highway Bridge Replacement and Rehabilitation Program Highway Bridge Replacement and Rehabilitation Program: The National Bridge Inventory will be used to determine eligibility for HBRRP funds. Highway bridges considered structurally deficient or functionally obsolete and with a sufficiency rating of 80 or less will qualify for HBRRP funds. Those bridges appearing on the list with a sufficiency rating of less than 50.0 will be eligible for replacement or rehabilitation. Those with a sufficiency rating of 80.0 or less will be eligible for rehabilitation only. To be considered for the classification of deficient bridge, a structure must be of bridge length, and have not been constructed or had major reconstruction within the past 10 years. The Bridge Maintenance Branch (Division of Maintenance/Department of Highways) receives approximately 60 to 70 million dollars annually from HBRRP. (HBRRP). The annual National Bridge Inventory (NBI) report determines the amount of HBRRP funds Kentucky will receive for a given fiscal year. The amount of state road funds is determined through the state legislative budgetary process.

HBRRP eligibility:

Rehabilitation: The bridge must be structurally deficient Structurally Deficient: A bridge is classified as structurally deficient if one of the following two conditions is true: (1) A condition rating of 4 (Poor) or less for the deck, superstructure, or substructure; (2) An appraisal rating of 2 (intolerable, high priority for replacement) or less for the structural condition, or waterway adequacy.
If the bridge is a culvert, a condition rating of 4(Poor) or less for the culvert will also cause the bridge to be classified as structurally deficient.
or functionally obsolete Functionally Obsolete: A bridge is classified as functional obsolete if one of the following two conditions is true: (1) An appraisal rating of 3 (intolerable, high priority for corrective action) or less for the deck geometry, under clearances, or approach alignment; (2) An appraisal rating of 3 (intolerable, high priority for corrective action) or less for the structural condition, or waterway adequacy. and have a sufficiency rating Sufficiency Rating: is calculated from a complex formula (developed by the FHWA) using 20 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". of 80 or less.

Replacement: The bridge must be structurally deficient Structurally Deficient: A bridge is classified as structurally deficient if one of the following two conditions is true: (1) A condition rating of 4 (Poor) or less for the deck, superstructure, or substructure; (2) An appraisal rating of 2 (intolerable, high priority for replacement) or less for the structural condition, or waterway adequacy.
If the bridge is a culvert, a condition rating of 4(Poor) or less for the culvert will also cause the bridge to be classified as structurally deficient.
or functionally obsolete Functionally Obsolete: A bridge is classified as functional obsolete if one of the following two conditions is true: (1) An appraisal rating of 3 (intolerable, high priority for corrective action) or less for the deck geometry, under clearances, or approach alignment; (2) An appraisal rating of 3 (intolerable, high priority for corrective action) or less for the structural condition, or waterway adequacy. and have a sufficiency rating Sufficiency Rating: is calculated from a complex formula (developed by the FHWA) using 20 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". of less than 50.

Condition ratings Condition Rating: Condition ratings are ratings assigned by the bridge inspector. Condition ratings consist of a one digit code from 0 to 9, where 9 indicates an "Excellent Condition" and a 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, and are also assigned to the channel/channel protection and culverts where applicable. and appraisal ratings Appraisal Ratings: 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. are key data items that determine the Sufficiency Rating, Structural Deficiency and Functional Obsolescence of a bridge.