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RESOLUTION R-1718-68: A RESOLUTION OF THE COUNCIL OF THE CITY OF NORMAN, OKLAHOMA, SELECTING H.W. LOCHNER AS THE CITY OF NORMAN'S APPOINTED BRIDGE INSPECTION CONSULTANT TO THE OKLAHOMA DEPARTMENT OF TRANSPORTATION FOR COMPLIANCE WITH THE NATIONAL BRIDGE INSPECTION STANDARDS.
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BACKGROUND: The Oklahoma Department of Transportation (ODOT) is tasked by Federal Highway Administration (FHWA) to perform Bridge Safety Inspections for all structures over 20' in length. Inspections are performed at least once every 2 years or more frequently if necessary. The purpose of the inspections is to identify any critical findings, document the bridge condition and make repair recommendations. The last inspection cycle performed in October, 2017, revealed the City of Norman has 75 bridges that currently meet the FHWA criteria. Of those bridges, 19 are classified as Structurally Deficient, and 5 are considered Functionally Obsolete. The average age of Norman's bridges is 42 years.
A Structurally Deficient bridge is defined as "a bridge inadequate to carry legal loads, whether caused by obsolete design standards, structural deterioration, or waterway inadequacy". Bridges in this category may include those posted to restrict load limits. A structurally deficient bridge rating is determined from the results of the field inspection findings where the condition of the deck, superstructure or substructure is considered to be in poor condition. The deck, superstructure and substructure are considered structural components of a bridge.
A Functionally Obsolete bridge is defined as "a bridge inadequate to properly accommodate the traffic due to inadequate clearances, either horizontal or vertical, approach roadway alignment, structural condition, or waterway adequacy". Structures in this category could include narrow bridges, bridges where the approach roadway alignment has limited sight distance or low under-clearances. The bridges are not structurally deficient, but...
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