Design StandardsDesign StandardsFor Local Agency For Local Agency

BridgesBridges

Statewide Local AgencyStatewide Local AgencyProject Delivery Project Delivery

ConferenceConferenceMay, 2006May, 2006

What We’ll Cover HereWhat We’ll Cover Here

Who Owns The Bridge?Who Owns The Bridge? Definition of a “Public Road”Definition of a “Public Road”

How Does A Bridge Become Eligible for How Does A Bridge Become Eligible for Rehabilitation or Replacement?Rehabilitation or Replacement? Inspection & Load Rating for Local BridgesInspection & Load Rating for Local Bridges ““HBRR” The Highway Bridge Rehabilitation and HBRR” The Highway Bridge Rehabilitation and

Replacement Program – Federal Funds for Local Replacement Program – Federal Funds for Local BridgesBridges

Design Standards for Local Agency BridgesDesign Standards for Local Agency Bridges AASHTOAASHTO

Who Who OwnsOwns The Bridge? The Bridge? Who Owns the Bridge?Who Owns the Bridge?

Your agency owns the bridge if your agency Your agency owns the bridge if your agency owns the street or road. Simple – right? owns the street or road. Simple – right?

Federal law provides oversight for bridges.Federal law provides oversight for bridges.

The National Bridge Inspection Standards, The National Bridge Inspection Standards, which is Federal law, covers all bridges which is Federal law, covers all bridges longer than 20 feet that are on public roads.longer than 20 feet that are on public roads.

The definition of public road that is used by The definition of public road that is used by the NBIS, 23CFR650 Part C, is contained in the NBIS, 23CFR650 Part C, is contained in 23 USC 101(a)(27). This is a definition that 23 USC 101(a)(27). This is a definition that you may be familiar with. "Any road or you may be familiar with. "Any road or street under the jurisdiction of and street under the jurisdiction of and maintained by a public authority and open to maintained by a public authority and open to the public".the public".

Another Stewardship Another Stewardship AgreementAgreement

FHWA Has Delegated Authority To FHWA Has Delegated Authority To States To Provide OversightStates To Provide Oversight

Local Bridges Are Owned And Managed By Local Bridges Are Owned And Managed By Local AgenciesLocal Agencies

States Ensure That The Bridges Are States Ensure That The Bridges Are Inspected Periodically (Usually Every Two Inspected Periodically (Usually Every Two Years)Years)

States Ensure That The Bridges Are Analyzed States Ensure That The Bridges Are Analyzed For Structural Capacity (Load Rated)For Structural Capacity (Load Rated)

States Ensure That Structurally Deficient States Ensure That Structurally Deficient Bridges Are Posted for Load Restrictions Bridges Are Posted for Load Restrictions and/or replacedand/or replaced

The HBRR ProgramThe HBRR Program

Highway Bridge Rehabilitation and Highway Bridge Rehabilitation and Replacement ProgramReplacement Program

This Program Includes Local Agency This Program Includes Local Agency BridgesBridges

Provides Funding For Rehabilitation Provides Funding For Rehabilitation And ReplacementAnd Replacement

Funding Is Usually Limited In Oregon Funding Is Usually Limited In Oregon to Replacement Activitiesto Replacement Activities Rehabilitation Is Sometimes Funded Rehabilitation Is Sometimes Funded

For Historic BridgesFor Historic Bridges

What Types Bridges Get What Types Bridges Get ReplacedReplaced

Bridges That Are DeterioratedBridges That Are Deteriorated Bridges That Have Posted Load Bridges That Have Posted Load

RestrictionsRestrictions Bridges That Are Functionally Bridges That Are Functionally

Obsolete (usually means too Obsolete (usually means too narrow)narrow)

Bridge Replacement Bridge Replacement StandardsStandards

For Geometric DesignFor Geometric Design

For Load Rating And For Load Rating And Structural DesignStructural Design

AASHTO LRFD Bridge Design SpecificationsAASHTO LRFD Bridge Design Specifications AASHTO is American Association State Highway

and Transportation Officials Covers Most of North America, Including Canada

LRFD is a Design Code; Load Resistance Factor Design

The LRFD Code Covers Load Rating and The LRFD Code Covers Load Rating and Design of Bridges, Culverts, Sign Supports, Design of Bridges, Culverts, Sign Supports, Tunnels, Retaining Walls, Illumination Tunnels, Retaining Walls, Illumination Supports and any other type of structure on a Supports and any other type of structure on a transportation facility.transportation facility.

Who Selects The Bridges Who Selects The Bridges That Are Going To Get That Are Going To Get

Funded For Funded For Replacement?Replacement?

The HBRR Local Agency Bridge Selection Committee.

Composed of State, County & Local Officials.

Selection Criteria Is Based On A Point System Using Information From Bridge Inspections And Bridge Load Ratings