DOE O 437.1B, Bridge and Tunnel Management

AVAILABLE ONLINE AT: INITIATED BY: www.directives.doe.gov Office of Asset Management U.S. Department of Energy ORDER Washington, D.C. Approved: 08-05-2026 SUBJECT: BRIDGE AND TUNNEL MANAGEMENT 1. PURPOSE. Ensure the safety, function, and efficient management of all Department of Energy (DOE) bridges, culverts, and tunnels in support of DOE missions through regular, comprehensive inspections and evaluations using resources effectively, efficiently, and in compliance with governing laws and regulations.1 2. CANCELS/SUPERSEDES. DOE O 437.1A, Bridge and Tunnel Management, dated September 23, 2024. Cancellation of a directive does not, by itself, modify or otherwise affect any contractual or regulatory obligation to comply with the directive. 3. APPLICABILITY. a. Departmental Applicability. (1) This Order applies to all DOE elements with responsibility for bridges, tunnels, or culverts where DOE has a legal interest or right to use such property except for the exemptions identified in Paragraph 3.c. The requirements supplement those of DOE O 430.1, Real Property Asset Management, current version. (2) The Administrator of the National Nuclear Security Administration (NNSA) must assure that NNSA employees comply with their responsibilities under this directive. Nothing in this directive will be construed to interfere with the NNSA Administrator’s authority under Section 3212(d) of Public Law 106-65, 106-65, National Defense Authorization Act for Fiscal Year 2000, to establish Administration- specific policies, unless disapproved by the Secretary. 1 23 CFR § 650, Subpart C, “National Bridge Inspection Standards (FHWA)”; 23 CFR § 650, Subpart E, “National Tunnel Inspection Standards (FHWA)”; and 49 CFR § 237, Bridge Safety Standards (FRA). DOE O 437.1B 2 DOE O 437.1B 08-05-2026 b. DOE Contractors. The requirements of this Order shall be incorporated into applicable contracts, including Management and Operating (M&O) contracts. The contractor is responsible for flowing down the requirements of this Contractor Requirements Document (CRD), if applicable. Contractors shall comply with the requirements of applicable federal, state, and local laws and regulations in carrying out the requirements of this Order unless relief has been granted in writing. Omission of any applicable law or regulation from the Order does not affect the obligation of the contractor to comply with such law or regulation. Contractors must comply with the requirements of this Order, except to the extent modified by the equivalencies or exemptions identified herein or issued to the contractor in writing by DOE utilizing the process outlined in DOE O 251.1E, Departmental Directives Program, including as amended or updated. c. Equivalencies and Exemptions for DOE O 437.1B. Equivalencies and exemptions to this Order are processed in accordance with DOE O 251.1, current version. Attachment 2 establishes the basis for equivalent requirements. The accountable Program Secretarial Officer (PSO) must approve any equivalency or exemption to the requirements delineated in this Order except those identified or otherwise required by federal regulation or implementing Department of Transportation guidance. (1) Exemptions. The following are not subject to this Order: (a) Federal Energy Regulatory Commission.

(b) Power Marketing Administrations. In accordance with Section 302 of P.L. 95-91, Department of Energy Organization Act of 1977, the Secretary operates and maintains the Power Marketing Administrations’ (PMAs’) electric power transmission systems by and through the PMA administrators. The PMAs are uniquely established within the Department by nature of their administrators’ obligations to meet statutory and public utility responsibilities for the safety, security, and reliability of electric power transmission. Administrators must determine the appropriate real property asset management program for their facilities, including consideration of appropriate parts of the criteria set forth in this Order and prudent utility industry practice. Except for assets subject to federal regulation, the PMAs are exempt from the requirements in this Order. (c) Accelerator facilities that are covered by DOE O 420.2, Safety of Accelerator Facilities, current version. (d) Culverts not inventoried in the Facilities Information Management System with Usage Code 2629. DOE O 437.1B 3 08-05-2026 (e) Pedestrian-only bridges (including elevated walkways) that do not meet the 23 CFR § 650, Subpart C definition of a highway bridge. These structures shall be managed in accordance with DOE O 430.1, current version. (f) Pedestrian-only tunnels that do not meet the 23 CFR § 650, Subpart E, definition of a tunnel. These structures shall be managed in accordance with DOE O 430.1, current version. (g) Equivalency. In accordance with the responsibilities and authorities assigned by Executive Order 12344, Naval Nuclear Propulsion Program, codified at 50 U.S.C. §§ 2406, Deputy Administrator for Naval Reactors, and 2511 and to ensure consistency through the joint Navy/DOE Naval Nuclear Propulsion Program, the Deputy Administrator for Naval Reactors (Director) will implement and oversee requirements and practices pertaining to this Directive for activities under the Director’s cognizance, as deemed appropriate. The notification requirements in Section 5 do not apply. 4. REQUIREMENTS. The following paragraphs set forth the requirements for bridge and tunnel management, including inspections, load rating and posting, scour appraisal, seismic vulnerability evaluation, vehicle traffic volume data collection, use of qualified personnel, quality management, records and reporting, and inventory and asset management. Attachment 2 provides acceptable approaches for implementing federal regulation and for meeting the requirements of this Order. It references federal regulations, DOE directives, and industry best practices. It also provides criteria for applying a graded approach to pedestrian bridges, tunnels, or culverts. a. Inspections. The contractor will ensure timely inspections, assessments, studies, and evaluations of each vehicle, railroad, and pedestrian bridge, culvert, and tunnel, as described in Attachment 2, are planned, conducted, and documented as required. b. Seismic Vulnerability Evaluation. The contractor will ensure each DOE real property asset subject to 23 CFR § 650.303 is evaluated for vulnerability to seismic events and the need for seismic retrofitting using the criteria in Attachment 2. c. Load Rating and Posting. The contractor will: (1) Maintain a current load rating for each active vehicle, railroad, and pedestrian bridge, tunnel, and culvert, as applicable, using the criteria and methods in Attachment 2. At-grade roadways in tunnels are exempt from load rating.

(2) When necessary, post a vehicle, railroad, and pedestrian bridge, tunnel, or culvert for load restrictions or restrict access using the criteria in Attachment 2. 4 DOE O 437.1B 08-05-2026 d. Scour Appraisal. (1) Maintain a current scour appraisal for each active bridge that crosses a waterway and culverts with a Facilities Information Management System (FIMS) usage code of 1768, using the criteria and methods in Attachment 2. (2) Scour appraisals are a risk-based and data-driven determination of the vulnerability to scour of a bridge or culvert with FIMS usage code of 1768, resulting from the least stable result of scour that is either observed or estimated through a scour evaluation or a scour assessment. e. Vehicle Traffic Volume Data Collection. (1) For each active public access vehicle bridge or tunnel, the contractor will determine the Annual Average Daily Traffic (AADT) and the Annual Average Daily Truck Traffic (AADTT). Do not include vans, pickup trucks, and other light delivery trucks in the AADTT volume. Update every 5 years. (2) For each active controlled access vehicle bridge or tunnel and for all culverts, the contractor will determine the average daily traffic (ADT) and the average daily truck traffic (ADTT). Do not include vans, pickup trucks, and other light delivery trucks in the AADTT volume. Update every 5 years f. Use of Qualified Personnel. The contractor will: (1) Ensure each person performing an inspection or evaluation meets the qualification requirements specific to the inspection or evaluation conducted and understands the duties of the role he or she is expected to perform as described in Attachment 2. (2) Document individual personnel qualifications including appropriate education, experience, licensure, and certifications, and current training, satisfy requirements in Attachment 2. Submit documented personnel qualifications to the DOE Bridge and Tunnel Manager. g. Quality Management. The contractor will: (1) Establish quality management procedures or requirements necessary to produce accurate and consistent bridge inspections conforming with inspection standards and criteria, inspection plans, quality control (QC) procedures, DOE policy, and federal and state requirements, including but not limited to all laws, rules, and regulations. DOE O 437.1B 5 08-05-2026 (2) Establish quality management procedures or requirements necessary to ensure that evaluation products—such as calculations, reports, and studies—are complete, accurate, and properly checked in accordance with applicable industry standards. (3) Establish quality management procedures or requirements necessary to ensure that information and data supporting the Department’s external reporting or implementation of bridge and tunnel management requirements is validated and provided in a timely manner. h. Records and Reporting. The contractor will ensure records, reports, and data are prepared, maintained, and submitted using the criteria in Attachment 2. i. Inventory and Asset Management. (1) The contractor will integrate requirements for bridge and tunnel management with existing operating and management procedures for real property. Document any locally established policies, procedures, or inspection intervals for bridges, tunnels, or culverts. (2) When available resources are inadequate to maintain an acceptable level of bridge, culvert, or tunnel safety, appropriate authorities must act to impose lane or load restrictions, or closures.

(3) The contractor will establish, document, and implement protocols for responding to a critical finding. Establish, document, and implement protocols for managing permit loads. (4) The contractor will establish, document, and implement bridge closure and reopening procedures. Once closed, a bridge may not be reopened until repairs are complete and a qualified engineer determines that the bridge is safe and, if necessary, posted for load restrictions. (5) For railroad bridges, the contractor will establish, document, and implement procedures and issue instructions to personnel responsible for train operations to prevent operation of equipment that would exceed the capacity of the bridge. 5. RESPONSIBILITIES. DOE real property is operated and managed by qualified and experienced federal and contractor personnel at Headquarters and field locations. The paragraphs below describe the responsibilities and authorities for effective management of DOE bridges, culverts, and tunnels, and establish accountabilities for management of these assets. a. Program Secretarial Officer/Program Office. (1) Implement the requirements of this Order through DOE elements. 6 DOE O 437.1B 08-05-2026 (2) Ensure validation and timely submission of information and data supporting the Department’s requirements and external reporting. (3) Determine which M&O and non-M&O contracts must include the CRD and notify Contracting Officers (COs) to incorporate the CRD. Determine which non-M&O contracts must include equivalent requirements to the CRD (in a contract clause or other contract provision, for example, in the statement of work) and notify COs to include the equivalent requirements in the contracts in a timely manner. (4) Approves equivalencies or exemptions from bridge and tunnel management requirements as defined in Paragraph 3.c. b. Director, Office of Environment, Health, Safety and Security. Provide advice and assistance for environment, health, safety, and security implementation. c. Site and/or Field Office Manager. Integrate bridge and tunnel management requirements into existing quality assurance2 and safety management systems,3,4 as well as site operations or emergency operations plans and procedures. d. Contracting Officer. For all applicable contracts and upon notification that a site/facility management contract is affected by this Order, the contracting officer(s) shall incorporate the requirements into the affected contract(s) via the “Laws, Regulations, and DOE Directives” clause of the contract, or through negotiation and modification, as appropriate. e. Head of Contracting Activity.5 Provides direction to COs to incorporate the CRD into contracts in a timely fashion upon notification of its applicability. f. DOE Bridge and Tunnel Manager. Serves as the DOE official responsible for performing the duties of Bridge Program Manager and Load Rating Engineer as set forth in Code of Federal Regulations 23 CFR § 650, Subpart C, and the duties of Tunnel Program Manager as set forth in Code of Federal Regulations 23 CFR § 650.507 pertaining to agency-wide bridge inspection policies and procedures, QC and quality assurance procedures, and preparation and maintenance of a bridge inventory. Ensures compliance with the requirements of 23 CFR § 650.307(e)(2). 2 DOE O 414.1, Quality Assurance, current version. 3 DOE O 450.2, Integrated Safety Management, current version. 4 48 CFR § 970.5223-1, DEAR Clause: Department of Energy Acquisition Regulations, Integration of

Environment, Safety and Health into Work Planning and Execution. 5 DOE O 361.1, Acquisition Career Management Program, current version. DOE O 437.1B 7 08-05-2026 6. INVOKED TECHNICAL STANDARDS. This Order does not invoke any DOE technical standards or industry standards as required methods. Any technical standard or industry standard mentioned in or referenced by this Order is not invoked by this Order. Note: DOE O 251.1, current version, provides a definition for “invoked technical standard.” 7. DEFINITIONS. Federal requirements or industry standards establish definitions for many of the terms used in this Order. Attachment 3 lists the source of established definitions or establishes definitions for Departmental use. Refer to the FIMS Glossary of Bridge and Tunnel Management Terms for additional definitions or terms. 8. REFERENCES. a. 23 U.S.C. § 101(a)(23), “Public Road.” b. 23 CFR§ 650, “Bridges, Structures, and Hydraulics,” Subpart C, National Bridge Inspection Standards (NBIS) and Subpart E, National Tunnel Inspection Standards. c. 49 CFR § 213, “Track Safety Standards” d. 49 CFR § 214, “Railroad Workplace Safety” e. 49 CFR § 237, “Bridge Safety Standards” f. Federal Highway Administration (FHWA) Standards and Manuals, including: (1) FHWA-HIF-22-017, “Specifications for the National Bridge Inventory” (2) FHWA-HIF-15-006, “Specifications for the National Tunnel Inventory” (3) FHWA-NHI-23-024, “Bridge Inspector’s Reference Manual” (4) Manual on Uniform Traffic Control Devices (11th ed., 2023) (5) Seismic Retrofitting Manuals, (Parts 1 and 2) (6) Tunnel Operations, Maintenance, Inspection, and Evaluation Manual (7) Underwater Bridge Inspection (8) Bridge Preservation Guide (9) Traffic Monitoring Guide (2022) (10) Hydraulic Engineering Circulars (HEC)-17, 18, 20, and 23 (11) FHWA-HOP-06-105, “Bridge Formula Weights” (Rev. 2015). 8 DOE O 437.1B 08-05-2026 g. American Association of State Highway and Transportation Officials (AASHTO) Manuals, including Culvert and Storm Drain Inspection Guide, Load and Resistance Factor Design (LRFD) Bridge Design Specifications, LRFD Guide Specifications for Pedestrian Bridges, Manual for Bridge Evaluation, and Manual for Bridge Element Inspection. h. American Railway Engineering and Maintenance-of-Way Association (AREMA)/ American Society of Civil Engineers (ASCE) Standards, including AREMA Manual for Railway Engineering, AREMA Bridge Inspection Handbook, and ASCE Underwater Investigations Manual. i. DOE O 226.1, Implementation of Department of Energy Oversight Policy, current version. j. DOE O 361.1, Acquisition Career Management Program, current version. k. DOE O 414.1, Quality Assurance, current version. l. DOE O 430.1, Real Property Asset Management, current version. m. DOE O 450.2, Integrated Safety Management, current version. n. International Organization for Standardization (ISO) 9000 Series, Quality Management Systems. 9. CONTACT. Questions regarding the implementation of this Order should be directed to the Office of Asset Management at doe-bpm@hq.doe.gov. BY ORDER OF THE SECRETARY OF ENERGY: JAMES P. DANLY Deputy Secretary DOE O 437.1B Attachment 1, CRD, Contractors Only 08-05-2026 Page 1-1 ATTACHMENT 1 CONTRACTOR REQUIREMENTS DOCUMENT DOE O 437.1A, BRIDGE AND TUNNEL MANAGEMENT

This Contractor Requirements Document (CRD) sets forth requirements applicable to the contract to which this CRD is inserted. It establishes the requirements for Department of Energy (DOE) contractors, including National Nuclear Security Administration contractors, whose contracts involve the management or operation of DOE sites or facilities that include bridges, tunnels, or culverts. Contractors are expected to meet these functional requirements through tailoring of their business processes and management practices and through use of nationally recognized industry standards and practices and voluntary consensus standards. Regardless of the performer of the work, the contractor is responsible for complying with the requirements of this CRD. The contractor is responsible for flowing down the requirements of this CRD to subcontractors at any tier to the extent necessary to ensure the contractor’s compliance with the requirements. In addition to the requirements set forth in this CRD, contractors are responsible for complying with Attachments 2, 3, and 4 to DOE O 437.1, current version, referenced in and made a part of this CRD, which provide requirements and information applicable to contracts in which this CRD is inserted. The contractor must establish and maintain a documented bridge and tunnel management approach satisfying federal regulations, DOE directives, and industry standards and practices. Attachment 2 provides acceptable approaches for implementing federal regulation and for meeting the requirements of this Order. It references federal regulations, DOE directives, and industry best practices. It also provides criteria for applying a graded approach to pedestrian bridges, tunnels, or culverts. The contractor’s bridge and tunnel management approach must satisfy the following requirements for the following structures: public- and controlled-access vehicular bridges; public- and controlled-access railroad bridges; public- and controlled-access pedestrian bridges, subject to 23 CFR § 650, Subpart C (including elevated walkways); public- and controlled-access vehicular tunnels; and culverts assigned Usage Code 2629 in the Facilities Information Management System. These include requirements specific to assets with nonredundant steel tension member bridges or complex features. 1. Inspections. Plan, conduct, and document timely inspections, assessments, studies, and evaluations of each bridge, culvert, or tunnel as described in Attachment 2. 2. Load Rating and Posting. a. Maintain a current load rating for each active vehicle, railroad, and pedestrian bridge, tunnel, or culvert using the criteria and methods in Attachment 2. At-grade roadways in tunnels are exempt from load rating. b. When necessary, post a vehicle, railroad, and pedestrian bridge, tunnel, or culvert for load restrictions or restrict access using the criteria in Attachment 2. Attachment 1, CRD, Contractors Only DOE O 437.1B Page 1-2 08-05-2026 3. Scour Appraisal. a. Maintain a current scour appraisal for each active bridge that crosses a waterway and culverts with FIMS usage code of 1768 using the criteria and methods in Attachment 2. b. Scour appraisals are a risk-based and data driven determination of vulnerability to scour for a bridge or culvert with FIMS usage code of 1768 resulting from the least stable result of scour that is either observed, or estimated, through a scour evaluation or a scour assessment.

4. Seismic Vulnerability Evaluation. Ensure each DOE real property asset subject to 23 CFR § 650.303 is evaluated for vulnerability to seismic events and the need for seismic retrofitting using the criteria in Attachment 2. 5. Vehicle Traffic Volume Data Collection. Determine traffic counts for each bridge and tunnel using the criteria in Attachment 2. 6. Use of Qualified Personnel. a. Ensure each person performing an inspection or evaluation meets the qualification requirements specific to the inspection or evaluation conducted and understands the duties of the role he or she is expected to perform as described in Attachment 2. b. Document and submit individual personnel qualifications including appropriate education, experience, licensure, and certifications as applicable, and current training using criteria in Attachment 2, to the DOE Bridge and Tunnel Manager. 7. Quality Management. a. Establish and implement quality management procedures or requirements necessary to produce accurate and consistent bridge inspections conforming with inspection standards and criteria; inspection plans; QC procedures; DOE policy; and federal and state requirements. b. Establish and implement quality management procedures or requirements necessary to ensure that evaluation products, such as calculations, reports, and studies, are complete, accurate, and properly checked in accordance with applicable industry standards. c. Establish and implement quality management procedures or requirements necessary to ensure that information and data supporting the Department’s external reporting and that bridge and tunnel management is validated and provided in a timely manner. 8. Records and Reporting. Prepare, maintain, and provide records, reports, or data using the criteria in Attachment 2. DOE O 437.1B Attachment 1, CRD, Contractors Only 08-05-2026 Page 1-3 9. Inventory and Asset Management. a. Integrate requirements for bridge and tunnel management with existing operating and management procedures for real property. Document any locally established policies, procedures, or inspection frequencies for bridges, tunnels, or culverts. b. When available resources are inadequate to maintain an acceptable level of bridge, culvert, or tunnel safety, act to impose lane or load restrictions, or closures. c. Maintain protocols for responding to a critical finding. d. Maintain bridge closure and reopening procedures. Once closed, a bridge may not be reopened until repairs are complete, and a qualified engineer determines that the bridge is safe and, if necessary, posted for load restrictions. e. For railroad bridges, maintain procedures and issue instructions to personnel responsible for train operations to prevent operation of equipment that would exceed the capacity of the bridge. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-1 ATTACHMENT 2 BRIDGE AND TUNNEL MANAGEMENT The following paragraphs set forth the requirements for bridge and tunnel management, including conduct of inspections and evaluations, use of qualified personnel, quality management, records and reporting, and inventory and asset management. Requirements are applicable and specific to the following structures: public- and controlled-access vehicular bridges, public- and controlled-access railroad bridges, public- and controlled- access pedestrian bridges subject to 23 CFR § 650, Subpart C (including elevated walkways), public- and controlled-access vehicular tunnels, and culverts assigned Usage Code 2629 in the Facilities Information Management System (FIMS). It includes requirements specific to assets with nonredundant steel tension members (NSTM) or complex features.

1. Inspections. The type and frequency of inspections performed may vary over the life of a bridge or tunnel to reflect the level of effort needed to document its condition. a. Types of Inspection. (1) Department of Energy (DOE) elements with a bridge, including a short-span bridge or tunnel structure among their real property holdings must plan, conduct, and document timely inspections6,7 in accordance with applicable national standards8,9,10,11,12,13,14 and the following requirements. Required inspections15 may include the following types: initial, routine, in-depth, NSTM, underwater, damage, or special. NSTM and underwater inspections are not applicable to tunnels. (2) DOE real property assets with Usage Code 2629 may be inspected in accordance with the AASHTO Culvert and Storm Drain System Inspection Guide in lieu of the 23 CFR § 650, Subpart C, National Bridge Inspection Standards. Assets with Usage Code 2629 with no fill or that are not designed structurally to account for soil-structure interaction shall be considered a short-span bridge. (3) Bridges with NSTMs, and bridges with complex features will be identified. 6 23 CFR § 650, Subpart C, National Bridge Inspection Standards 7 49 CFR § 237, Bridge Safety Standards, Subpart D, Capacity of Bridges 8 FHWA, Bridge Inspector’s Reference Manual 9 FHWA, Specifications for National Bridge Inventory 10 AASHTO Manual for Bridge Evaluation 11 AASHTO, Manual for Bridge Element Inspection 12 AREMA, Manual for Railway Engineering 13 AREMA, Bridge Inspection Handbook 14 FHWA, Tunnel Operations, Maintenance, Inspection, and Evaluation Manual 15 Federal regulations for railroad bridges and highway bridges include slightly different terminology and requirements for type of inspections. The Department of Energy maintains consistent terminology for the various types of inspections as defined in Attachment 3. Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-2 08-05-2026 (4) Bridges with Critical Findings will be identified. (5) Bridges requiring underwater inspections will be identified. (6) Bridges that are scour critical or have unknown foundations and bridges where scour appraisals have not been conducted will be identified. (7) Bridges on the National Highway System will be identified. (8) The inspection interval for all required inspections of each bridge will be determined and documented. (9) Seismic trigger events for prioritizing damage inspections after seismic events will be determined and documented. (10) Types of inspections required for each bridge, culvert, and tunnel will be determined and documented. b. Inspection Interval. The frequency of inspection is specific to each bridge, tunnel, or culvert based on factors affecting safety, reliability, and consequences of failure. (1) Table 2.1 will be used to determine and document the inspection interval of each required inspection for each active asset by (a) Establishing a baseline month for routine, underwater, or NSTM inspections. 1 Inspection tolerances shall be in accordance with 23 CFR § 650.311(e) for vehicular bridges. Subsequent inspections must revert to the previous schedule. 2 Inspection tolerances shall be in accordance with 23 CFR § 650.511(b)(5) for vehicular tunnels. Subsequent inspections must revert to the previous schedule. (b) Identifying those structures requiring variations from the established intervals and documenting the rationale for such determination.16 16 23 CFR § 650.311 Inspection interval. Regular inspection intervals, reduced inspection intervals, and extended

inspection intervals for routine, NSTM, and underwater inspections were determined using Method 1. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-3 Table 2.1: Established Regular Inspection Intervals (2) Inspection Interval Variance. The inspection interval may be adjusted based on the condition of the asset. The following guidelines are used to determine whether an asset is a likely candidate for variance approval: (a) Routine Inspections of Vehicular and Short-Span Bridges. 1 Reduced Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(a)(1)(ii). 2 Extended Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(a)(1)(iii). Inspection Type Asset Type w/ FIMS Usage Code Vehicle Bridge Short Span Bridge Railroad Bridge Vehicular Tunnel Pedestrian Bridge Culvert 1768 or 1769 2629 1468 or 1469 1471 1168 or 1169 2629 Initial - Perform initial routine inspection within 3 months of date placed in service, acquisition, change in configuration, or replacement/rehabilitation - Perform initial underwater and/or NSTM inspections within 12 months of date placed in service, acquisition, change in configuration, or replacement/ rehabilitation Routine Regular intervals not to exceed 24 months 1 per calendar year Regular intervals not to exceed 24 months Regular intervals not to exceed 60 months In-Depth As determined by the cognizant Responsible Engineer NSTM Regular intervals not to exceed 24 months 1 per calendar year N/A Regular intervals not to exceed 24 months N/A Underwater Regular intervals not to exceed 60 months As determined by the Responsible Engineer N/A Regular intervals not to exceed 60 months N/A Damage - As soon as practical after damage occurs - Before structure is reopened to traffic, or - Per the site’s emergency action plan following an established seismic trigger event. Special As established Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-4 08-05-2026 (3) In-Depth Inspection. An In-Depth Inspection may be scheduled17 along with or independent of a routine inspection or conducted as a follow-up to a damage or other type of inspection. Schedule in-depth inspection of railroad bridges in consultation with the cognizant Railroad Bridge Engineer. (4) Nonredundant Steel Tension Member (NSTM) Inspection. NSTM inspections may be performed as part of a routine inspection or as an independent inspection effort. The following guidelines are used to determine whether a vehicular and short-span bridge is a likely candidate for variance approval: (a) Reduced Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(c)(1)(ii). (b) Extended Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(c)(1)(iii). (5) Underwater Inspection. Underwater inspections may be performed as part of a routine inspection or as an independent inspection effort. Use the following guidelines to determine whether a vehicular and short-span bridge is a likely candidate for variance approval: (a) Reduced Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(b)(1)(ii). (b) Extended Inspection Intervals: Will meet all requirements of 23 CFR § 650.311(b)(1)(iii) (6) Damage Inspection. Damage inspections will be scheduled immediately following an accident or trigger event involving the structure to determine whether it should be closed. This may be followed by an in-depth inspection to document the full extent of the damage as well as the urgency and scope of repairs.

(7) Scour Monitoring Inspection. An inspection performed during or after a triggering storm event may be required by a scour plan of action (Scour POA). 17 Conditions that may prompt an in-depth inspection of a bridge include apparent cracks in steel members; apparent cracks, de-bonding, or loss of tendon section in prestressed concrete members; suspected frozen bearings or failed hold-down devices; severe section loss from steel members; buckled or bent steel girders or beams; disconnected or loose members; or visual fretting rust on the pin of a pin and hanger connection. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-5 (8) Special Inspection. Special inspections are scheduled at the discretion of the responsible DOE Element considering the severity of a known deficiency. Changes in condition between inspections should be a factor in determining the frequency for conduct of special inspections. Inspections will be conducted more frequently as conditions deteriorate. The following guidelines serve to determine the special inspection interval: (a) For a bridge not capable of carrying state legal loads, inspection interval of no more than 12 months. (b) For a bridge with a National Bridge Inventory (NBI) Condition Rating of 4 for the deck, superstructure, substructure, or a primary load carrying member, inspection interval at 6–12 months. (c) For a bridge with an NBI Condition Rating of 3 or less for the deck, superstructure, substructure, or a primary load carrying member, inspection interval of 6 months or less. (d) For a bridge with known load-carrying deficiencies, inspection interval as determined in coordination with the DOE Bridge and Tunnel Manager (BTM). (e) For a bridge with advanced deterioration, inspection interval as determined in coordination with the DOE BTM. (9) Complex Feature Inspection. An inspection interval less than 24 months may be required for deficient members as determined in coordination with the Site and/or Field Office Manager and DOE BTM. (10) Vehicular Tunnels. Apply the following criteria for selecting a Routine Inspection interval of less than 24 months: poor condition, damage, change in condition between inspections, unknown capacity or history of performance, known problems, consequences of failure, and existence of temporary supports or necessary repairs. (11) Inspection Interval Variation Approval. (a) Any variation from the inspection intervals in Table 2.1 requires documentation. A less frequent inspection schedule requires advance approval. Any change to a more frequent inspection schedule requires notification. Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-6 08-05-2026 (b) Less Frequent Inspections. A request to the DOE BTM via line management will be submitted prior to increasing the inspection interval. The DOE BTM will review the request and determine its merit, or when appropriate, submit to the Federal Highway Administration (FHWA) for review and approval. For bridges included in the NBI or tunnels included in the National Tunnel Inventory, final determination is subject to FHWA approval. The request must include: 1 The structure real property unique identification number; 2 The proposed inspection interval in months; 3 A list of criteria used to justify the request and how each criterion is met; and 4 Any other explanation as to why the proposed inspection interval is suitable.

c. Inspection Procedures. (1) Prepare a plan for each inspection specific to the intended inspection type and addressing each of the following phases of the inspection. Identify all specialized procedures necessary to inspect bridges with NSTM or all the complex features or special features of a bridge. Inspect each bridge according to established procedures and structure-specific inspection plan addressing: (a) Pre-inspection phase—planning and coordination activities; (b) On-site inspection phase—worker safety; public safety; traffic management; field inspection equipment, tools, and materials; inspection techniques including nondestructive tests and/or other physical and chemical tests; and documentation techniques; and (c) Post-inspection phase—recording, reporting, recommendations, archiving, and follow-up to critical findings. (2) Each Public, controlled-access, or short-span vehicle bridge, railroad bridge, or tunnel inspection will be conducted under the full time, onsite supervision of an Inspection Team Leader or Railroad Bridge Inspector who is responsible for the accuracy of the results and is accompanied by at least one other inspector. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-7 (3) Conduct underwater inspections18,19 to determine member condition where conditions are such that the stream bottom elevation around the foundations cannot be accurately measured by use of rods, poles, weighted sounding lines, or other means, or if any portion of a substructure is exposed to water deeper than 3 feet during periods of normal low water. A qualified diver must complete this inspection if the waterway cannot be waded safely. (4) Upon discovery of a critical finding, determine what action is required, how quickly that action needs to be implemented, the extent to which the bridge can be used (e.g., partial lane closures, load limits), or if it should be closed. Provide notifications and submit a follow-up to critical findings report detailing the intended recovery strategy with planned actions and milestone dates to ensure the safety of personnel and continuance of site operations. (5) If a crack in an NSTM is detected during an inspection, a Responsible Engineer will determine the necessity for a fatigue or fracture evaluation. When needed, complete the evaluation under the direction of a qualified engineer to determine the useful life and the critical crack size. Document and initiate monitoring procedures or necessary repairs. (6) Review existing load rating during each routine inspection to ensure conditions and assumptions are still valid. Perform a new load rating if conditions and assumptions used for the existing load rating are not valid, or when recommended by inspectors, or when concern for reduced structural capacity is caused by unexpected events. (7) Review existing scour appraisal during each routine inspection to confirm conditions and assumptions are still valid. Perform a new scour appraisal if conditions and assumptions used in the existing scour appraisal are not valid, or after any bridge-specific trigger event, following a flood event, or when conditions affect the flow change. (8) Review existing seismic vulnerability evaluation during each routine inspection to ensure conditions and assumptions used are still valid. 18 American Society of Civil Engineers (ASCE), Underwater Investigations: Standard Practice Manual, and

FHWA-NHI-10-027, Underwater Bridge Inspection, June 2010 19 Among other factors used to determine type and extent of inspection, include structure type, materials of construction, foundation type, footing location relative to channel bottom, known or suspected problems, waterway characteristics, superstructure and substructure redundancy, and scour susceptibility. Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-8 08-05-2026 (9) Promptly following structural damage resulting from environmental factors or human action, conduct a damage inspection20 sufficient to determine whether there is a need for emergency load restrictions or closure of part or all of the structure to traffic as well as the level of effort necessary to repair the damage. 2. Load Rating and Posting. The intent of load rating and posting is to ensure that bridges are appropriately evaluated to determine their safe live load carrying capacity and any load restrictions are appropriately posted. a. Rate each active vehicle bridge, railroad bridge, pedestrian bridge, culvert, and vehicular tunnel for its load carrying capacity. Load rate each newly acquired bridge within 90 days of the date placed in service or acquired. b. Review existing load rating during each routine inspection to ensure conditions and assumptions are still valid. Perform a new load rating if conditions and assumptions used for the existing load rating are not valid, or when recommended by inspectors, or when concern for reduced structural capacity is caused by unexpected events. c. Vehicle Bridges. (1) Rate a vehicle bridge or short-span bridge for its safe load carrying capacity of all unrestricted state legal loads, including state routine permits loads in accordance with Section 6A of the AASHTO Manual for Bridge Evaluation. (2) The load rating must reflect the condition of the bridge as reported in the most recent bridge inspection report. Reflect any deficiencies that reduce member capacity in the load capacity determination. If the effects of condition on capacities is unknown or uncertain, conduct a special inspection21 to adequately quantify location and extent of deficiencies. Account for any modifications to the bridge that affect loading on (e.g., change in dead loads) or response of the member being rated. 20 May require collection of detailed measurements and descriptions of damage necessary to assess the impacts to strength and function of the affected member as well as on-site calculations needed to establish emergency load restrictions. May be followed by a more refined analysis to establish or adjust interim load restrictions. 21 Performed when a structure requires more frequent inspection than is given by the routine inspection cycle, typically for a known defect or condition severe enough to warrant extra scrutiny. The frequency of special inspections is determined on a case-by-case basis. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-9 (3) Base load ratings on as-built drawings that have been verified by field measurements. When these drawings are not available, take field measurements and perform field testing. When as-built drawings do not exist, and field measurements cannot adequately quantify capacity (e.g., bridges with reinforced concrete members), base the load rating on a field evaluation and documented engineering judgment in accordance with FHWA guidance. Document basis of assumptions to include some evidence that a search for design or as-built data has been attempted or other efforts to provide some background or history of the structure and a discussion of load history that confirms the load assumptions for normal traffic. Specifically, identify the assumed normal traffic. Coordinate with state agencies to identify state legal loads and if they comply with federal weight limits and the bridge formula,22 (also known as Formula B).

(4) Evaluate bridge for the AASHTO HL 93 design vehicle for determining NBI Items B.LR.06, Operating Load Rating Factor, and B.LR.05, Inventory Load Rating Factor, and to determine the need for evaluating state legal loads. (a) If the Inventory Rating Factor is less than 1.0, and the state does not comply with federal weight limits and the Bridge Formula, rate for state legal loads. (b) In states that comply with federal weight limits and the Bridge Formula, rate for state legal loads when the Operating Rating Factor is less than 1.0. (5) Determine load ratings and rating factors for specialized hauling vehicles. (6) If the Inventory Rating Factor for the AASHTO HL 93 design vehicle is less than 0.9 using the load and resistance factor design (LRFD) method,23 determine load ratings and rating factors for emergency vehicles (EV2 and EV3). d. Railroad Bridges. (1) Rate each railroad bridge for the applicable limit states defined in the AREMA Manual for Railway Engineering. 22 FHWA, FHWA-HOP-06-105, Bridge Formula Weights, August 2006 23 AASHTO, LRFD Bridge Design Specifications, 7th Edition with Interim Revisions, or current version Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-10 08-05-2026 (2) Base load ratings on as-built drawings that have been verified by field measurements. When these drawings are not available, take field measurements and perform field-testing. When as-built drawings do not exist, and where field measurements cannot adequately quantify required dimensional data, base the load capacity on a field evaluation and the documented engineering judgment of the Railroad Bridge Engineer. Determinations by judgment can be based on history and current use of the bridge. For example, the bridge could be rated based on known weight of passing loads if there is no evidence of distress. (3) Evaluate each bridge for the Cooper E-80 loading as defined in Figure 15-1-2 of the AREMA Manual for Railway Engineering. Consider other standard loading or loading consisting of specific equipment based on normal use of the bridge. The load rating must consider capacity of the superstructure as well as the substructure. (4) Conduct a fatigue evaluation on each bridge with fatigue-susceptible details following the procedures in Chapter 15 of AREMA Manual for Railway Engineering. Live load stresses and traffic volumes must be known. A qualitative analysis may be completed for bridges with low traffic volumes and low stresses. (5) Determine normal rating both with and without fatigue considerations. If there is a need to allow infrequent operation of loads greater than normal, determine maximum rating in accordance with AREMA Manual for Railway Engineering. Fatigue need not be considered for maximum rating. e. Pedestrian Bridges. (1) Determine24 the design strength of the bridge considering the existing condition, geometry, and materials. (2) Determine required strength for loads prescribed in the LRFD Guide Specifications for the Design of Pedestrian Bridges or as required by the state within which the bridge is located or actual loads. (a) When vehicular access is not prevented on the pedestrian bridge, use the design vehicle and limit state specified in 3.2 of LRFD Guide Specifications for the Design of Pedestrian Bridges. (b) If vehicular access is prevented on the pedestrian bridge, do not consider the design vehicle. 24 AASHTO LRFD Guide Specifications for the Design of Pedestrian Bridges, current version

Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-11 (3) Where the design strength is determined to be less than the required strength, and where: (a) Vehicular access is not prevented, conduct an iterative process to determine if the design strength is adequate with a lesser design vehicle load (using standard AASHTO H or known loading). If the design strength is acceptable for a lesser vehicle load, then the bridge must be posted. If it is determined that the design strength is less than required with no vehicle loading, develop a plan of action to prevent unsafe access. (b) Vehicular access is prevented, develop a plan of action to prevent unsafe pedestrian access. (c) A fatigue evaluation is required, evaluate for the AASHTO LRFD Fatigue I limit state for applicable loads specified in 3.5 of LRFD Guide Specifications for the Design of Pedestrian Bridges. (4) Alternatively, post each pedestrian bridge for the allowed vehicle load where vehicular access is not prevented. If vehicular access is prevented, post for the maximum number of people allowed on the bridge at one time. f. Culverts. Rate each culvert for its safe load carrying capacity. For a culvert with sufficient fill to minimize live load effects, showing no signs of distress, and the consequences of failure are low, rate in accordance with Section 6.1.4 of the AASHTO Manual for Bridge Evaluation.25 For a culvert with a depth of fill greater than either 8 feet or its span length whichever is greater, the live load is considered negligible, so live load analysis is not required. g. Vehicular Tunnels. Rate each tunnel’s safe vehicular load-carrying capacity in accordance with Sections 6 or 8 of the AASHTO Manual for Bridge Evaluation. 25 Section 6.1.4 of the AASHTO Manual for Bridge Evaluation is specifically for reinforced concrete bridges. It is acceptable for application to concrete culverts and to culverts constructed from other materials where the structure has carried normal traffic for an appreciable period of time and shows no distress. Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-12 08-05-2026 h. Refined Analyses and Testing. When the load rating results in intolerable deficiencies and posting will result in severe impacts to site operations, consider conducting more refined analyses or testing. This analysis will typically consist of detailed three-dimensional finite element analyses of varying complexities. It may be conducted in conjunction with a load test or material testing to determine material properties, strength, or condition. The refined analyses or load testing may provide a more realistic distribution of loads to the various members and overall system response. See Section 5 of the AASHTO Manual for Bridge Evaluation for guidelines on testing. Alternatively, the bridge can be proof tested. See Chapter 8 of the AASHTO Manual for Bridge Evaluation for load and proof test procedures. These procedures are highly specialized and must be performed only by qualified individuals with documented experience in performing this type of analysis. i. Rerate a bridge within 90 days when: (1) There is a change in the condition of the bridge that would affect its load carrying capacity; (2) There is a change in the configuration of the bridge through construction, alteration, or rehabilitation that would affect its load carrying capacity;

(3) Damage occurs to the bridge either through physical or environmental conditions, i.e., corrosion has resulted in significant section loss on load-carrying steel members or components, cracking in primary members, losses at critical connections, or strength has changed due to damage from vessel or vehicular collision, fire, flood, or earthquake; (4) There are changes to dead loads—for example, from deck resurfacing or utility additions, changes in traffic loadings and/or traffic volume, or temporary construction loads exceed traffic loads; (5) Soil and substructure settlement or slope instability has occurred; or (6) Required by additional guidance. j. Posting. (1) Post bridge load restrictions in accordance with the Manual for Uniform Traffic Control Devices26 or state requirements. (2) Post a vehicle bridge for load restrictions where state legal loads exceed the calculated load capacity of the bridge. (3) Post bridges for speed to reduce impact loading where necessary. 26 FHWA Manual on Uniform Traffic Control Devices, 11th Edition. December 2023 Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-13 (4) Post a vehicle bridge for load restrictions when evaluated for emergency vehicles. Post appropriately for both the governing single axle weight limit and tandem axle weight limit derived for each emergency vehicle configuration. (5) For railroad bridges that have normal load ratings less than normal load requirements, determine and document necessary operational restrictions. These may involve speed restrictions, coordination with track operation personnel, or other operational constraints. Issue instructions to the personnel who are responsible for the configuration and operation of trains to prevent the operation of cars, locomotives, or other equipment over a bridge that would exceed the capacity or dimensions of the bridge. (6) For each pedestrian bridge where the design strength is less than required strength, post for the allowed vehicle load where vehicular access is not prevented. For a pedestrian bridge where vehicular access is prevented and the design strength is less than 60 pounds per square foot or less than the required strength, determine a safe posting that limits the number of pedestrians on the bridge at one time. Select site-appropriate posting and enforcement procedures. (7) Post or restrict the highways in or over a tunnel when the maximum unrestricted legal loads or state routine permit loads exceed those allowed under the operating rating or equivalent rating factor. k. Bridge Restrictions or Closure. (1) Immediately close to traffic any vehicle bridge with a load rating of 3 tons or less. Close to traffic any vehicle bridge when an imminent failure is possible. Bridge closure requires some combination of barrier, signage, and flagging or other means of controlling bridge access. The closure could be limited to specific lanes, or it could be a complete closure to all traffic. Follow state guidelines for closure and detour traffic control requirements. (2) When the load rating evaluation reveals that a vehicle bridge requires posting, but is not, posting must be complete within 30 days of load capacity determination. Where posting is insufficient to ensure compliance with weight restrictions, engage law enforcement or install monitoring devices, including cameras, weigh-in-motion sensors, or radar stations.

(3) For railroad bridges that have normal load ratings less than normal load requirements, document necessary operational restrictions within 90 days of load capacity determination. Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-14 08-05-2026 l. Load Rating Report. (1) Report must include information about who performed the load rating, when the rating was performed, date of determination, assumptions and known information about the bridge used in rating the bridge, loading information, capacity calculations, load rating methodology, load rating calculations, and any computer input and output used to calculate the loads and the capacities. Identify formulas used in the analysis and reference sources. Identify state legal loads as well as the state’s compliance with federal weight limits and the Bridge Formula. Define terms and nomenclature used. (2) All calculations must be checked and initialed by the engineer who developed the calculations and by the engineer who checked them. (3) Document use of computer programs to include description of model (i.e., elements, boundary conditions, and load application) and comparison of differences between the model and actual behavior. Calculations developed by computer analysis must include a cover page explaining the analysis performed and must be initialed by the engineer who developed the input and the engineer who checked the input and results. State why the differences are acceptable and how the results might be affected. Results should include load effect diagrams and deflection plots, as applicable. (4) For vehicle bridges, include a summary of the calculation results including the inventory and operating ratings for the AASHTO design vehicle, state legal loads if evaluated, and any required posting values for each vehicle type. Identify the controlling member(s). (5) For vehicle bridges, identify recommended data entries for NBI Items B.LR.01 through 08, and B.PS.01 and B.PS.02 in accordance with the FHWA Specifications for the National Bridge Inventory.27 (6) For railroad bridges, include a summary of the calculation methodology and results including the normal and maximum ratings for the Cooper E-80 loading, or any modified loading that is normal for the track. Identify the controlling member(s) for each load rating. (7) A qualified Load Rating Engineer must certify the rating as complete, accurate, and in accordance with applicable standards. Include the qualifications of Load Rating Engineer or Railroad Bridge Engineer and Load Rating Reviewer. (8) Include QC documentation. 27 FHWA Specifications for the National Bridge Inventory, March 2022. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-15 m. Bridge File. (1) Place all documents, including evaluator’s qualifications, load rating calculations and reports in the bridge file. (2) When the bridge requires load limit posting, place evidence of bridge posting in the bridge file. (3) When operational restrictions are necessary, place evidence of such restrictions and enforcement procedures in the bridge file. 3. Scour Appraisal. A scour appraisal is a risk-based and data-driven determination of a bridge’s vulnerability to scour, resulting from the least stable result of scour that is either observed, or estimated through a scour evaluation or a scour assessment. Appraise28,29 each active bridge that crosses a waterway and culverts with FIMS Usage Code 1768 for vulnerability to scour and stream instability from floods. Appraise each new and newly acquired bridge and culvert within 90 days of the date placed in service or acquired.

a. Approach. The extent of each scour appraisal depends upon existing site conditions. A complete appraisal may include a qualitative assessment (Level 1) only, a quantitative evaluation (Level 2 or Level 3), or a hydraulic engineering analysis. (1) Level 1 Assessment. A Level 1 field assessment identifies the susceptibility of a bridge or culvert to scour and accurately records the present condition of the culvert, bridge foundations, and stream stability. Each bridge or culvert is evaluated by viewing all available data, including as-built plans, hydraulic studies, soundings and other underwater investigations, streambed and foundation soils, and historical use. If needed, HEC-18, “Evaluating Scour at Bridges,” and HEC-20, “Stream Stability at Highway Structures,” include guidance for collecting site data. The Level 1 assessment results in bridge or culvert classification for scour vulnerability as low risk, scour critical, or scour susceptible. (2) Bridge with Low Risk for Scour. Low risk bridges are monitored for scour during routine inspections and after significant events. They are reevaluated for scour after significant flood events and when site conditions change. Bridge types and locations often considered low risk when there is no history of scour are: (a) Single-span bridges with protected abutments; (b) Bridges with foundations well above the flood plain; (c) Bridges over dams or pools with small flows; 28 FHWA Publication No. FHWA-HIF-12-003, Hydraulic Engineering Circular (HEC)-18, “Evaluating Scour at Bridges,” April 2012 29 FHWA Publication No. FHWA-HIF-12-004, HEC-20, “Stream Stability at Highway Structures,” April 2012 Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-16 08-05-2026 (d) Bridges over lined channels; (e) Bridges with spread footings on non-erodible bedrock; and (f) Bridge length culvert with a floor. (3) Level 2 or Level 3 Evaluation. Further analysis must be completed within 90 days when a Level 1 assessment determines the bridge is scour susceptible, has unknown foundations, or is over tidal waters. Hydrologic data and streambed material properties must be obtained to conduct the Level 2 analysis. Level 3 analysis uses more detailed hydrologic and streambed material property data to complete mathematical or physical model studies. Bridge susceptibility to scour cannot be determined unless the construction details of the foundation are known. Make every attempt to determine the foundation type and depth, including searching for bridge records or conducting foundation testing. Once the foundation has been determined, perform a scour evaluation to determine potential scour depths and scour classification. Until the foundation is determined and the potential scour depths are known, implement a scour plan of action with a scout monitoring inspection plan and closure protocols. b. Scour Appraisal Results. Determine appropriate rating for NBI Items B.C.11, B.AP.02, B.AP.03, and B.AP.04 (scour condition rating, overtopping likelihood, scour vulnerability, and scour plan of action) in accordance with FHWA Specification for the National Bridge Inventory. Record the results of the scour evaluation in the structure inventory and appraisal (SI&A) data. Review existing scour appraisal concurrent with each routine inspection. (1) Reappraise each bridge for changes in vulnerability to scour after any bridge-specific trigger event, following a flood event, or when conditions affecting the flow change.

(2) Develop and execute a bridge-specific scour critical plan of action (Scour Critical POA) for each bridge where NBI Item B.AP.04 (scour plan of action) is coded N or Y. (3) Immediately close to traffic any bridge where the recommended rating code for NBI Item B.C.11 (scour condition rating) is 1 or where the recommended rating code for NBI Item B.C.03 is 1 based on scour. (4) Where NBI Item B.C.11 (scour condition rating) is coded 0, retain evidence of bridge closure. (5) Bridge File. Place the completed scour appraisal, including qualifications for the Responsible Engineer and Inspection Team Leader, information required to do the appraisal, any Scour Critical POA, and evidence of any mitigation efforts in the bridge file. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-17 4. Seismic Vulnerability Evaluation. a. Evaluate30,31 existing bridges subject to 23 CFR § 650.303 to determine vulnerability to seismic events and the need for seismic retrofitting. Evaluate each newly acquired bridge subject to 23 CFR § 650.303 within 90 days of the date placed in service or acquired. A bridge is exempt from retrofitting for both levels of ground motion if it: (1) Has 15 years or less of anticipated service life; (2) Is temporary; or (3) Is closed to traffic and does not cross an active highway, rail, or waterway. b. Review existing seismic vulnerability evaluation during each routine inspection to ensure conditions and assumptions used are still valid. c. Reevaluate a bridge within 60 days of a change in configuration or seismic retrofit. d. Seismic Vulnerability Evaluation Results. Document the conduct and results of seismic vulnerability evaluations and reviews. (1) Identify evaluation assumptions, methods and formulas, calculations, and terms or nomenclature used. Identify resultant seismic retrofit category for both upper and lower ground motion levels. (2) If the bridge meets the criteria for Seismic Retrofit Category A for the upper-level ground motion, document justification for retrofit exemption in the bridge file. (3) If the bridge meets the criteria for Seismic Retrofit Category B, C, or D, identify bridge rank and priority index. Where the need for retrofit is determined, document the retrofit strategy. (4) Include qualifications of the Responsible Engineer. e. Bridge File. Place the completed seismic evaluations, including qualifications for the Responsible Engineer and evidence of any retrofit efforts in the bridge file. 30 FHWA Seismic Retrofitting Manual for Highway Structures: Part 1 – Bridges, January 2006 31 FHWA Seismic Retrofitting Manual for Highway Structures: Part 2 – Retaining Structures, Slopes, Tunnels, Culverts, and Roadways, August 2004 Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-18 08-05-2026 5. Vehicle Traffic Volume Data Collection. a. For each active publicly accessible vehicle bridge or tunnel determine the annual average daily traffic (AADT) and the annual average daily truck traffic (AADTT). Do not include vans, pickup trucks and other light delivery trucks in this percentage. Update every 5 years. b. For each active controlled-access vehicle bridge or tunnel and for all culverts, determine the ADT and the ADTT). Do not include vans, pickup trucks, and other light delivery trucks in the AADTT volume. Update every 5 years. c. Record the results in the SI&A or National Tunnel Inventory (NTI) data. Place data collection32 results and forecasts in the Bridge File or Tunnel File.

6. Use of Qualified Personnel. Required education, experience, licensure, certifications, and current training is specific to inspection type or evaluation and role. Submit documentation supporting the satisfaction of all qualifications to the DOE BTM. Minimum qualifications include: a. Inspection Team Leader or Railroad Bridge Inspector. (1) For public- or controlled-access bridges and short-span bridges, the Inspection Team Leader must meet the requirements of 23 Code of Federal Regulations (CFR) § 650.309(b). (2) For structures with NSTM, the Inspection Team Leader must meet the requirements of 23 CFR § 650.309(c). (3) For bridges with complex features or requiring special inspection, the Inspection Team Leader must have additional qualifications including: (a) A current registration as a professional engineer (civil or structural); (b) At least 5 years of experience in inspection of bridge type being inspected; and (c) Completed training specific to type of bridge being inspected. (4) For culverts, the Inspection Team Leader must hold a current registration as a professional engineer (civil or structural). (5) For railroad bridges, the Railroad Bridge Inspector must also: (a) Complete training from an accredited university or industry-related organization such as American Railway Engineering and Maintenance-of-Way Association (AREMA); 32 FHWA Traffic Monitoring Guide presents methodology for gathering data on traffic volumes. Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-19 (b) Have at least 5 years of experience similar to that identified in 49 CFR § 237.53; and (c) Demonstrate familiarity with 49 CFR § 214, Railroad Workplace Safety, through successful completion of an employer-provided or industry training course. (6) For vehicular tunnels, the Inspection Team Leader must meet 23 CFR § 650.509(b) requirements. When the tunnel is complex or has distinctive features the Inspection Team Leader must hold a current registration as a professional engineer (civil or structural). b. Inspection Team Members. For railroad bridges, demonstrated familiarity with 49 CFR § 214, Railroad Workplace Safety, through successful completion of employer-provided training or course provided by an industry-related organization such as AREMA. c. Underwater Bridge Inspection Diver. Meet the requirements of 23 CFR § 650.309(e). d. Load Rating Engineer or Railroad Bridge Engineer. (1) For public- or controlled-access vehicle bridges, short-span bridges, culverts, and pedestrian bridges, meet the requirements of 23 CFR § 650.309(d). (2) For railroad bridges: (a) Current registration as a professional engineer; (b) At least 10 years of experience similar to that identified in 49 CFR § 237.51(a); and (c) Demonstrated working knowledge of the AREMA Manual and of rating methodology used in the given load rating through submission of a personnel qualifications statement identifying work on a similarly constructed and loaded structure. (3) For tunnels, meet the requirements of 23 CFR § 650.509(c). e. Responsible Engineer. (1) Current registration as a professional engineer, (2) Completed training specific to the evaluation type performed, such as: (a) NHI course in Stream Stability and Scour at Highway Bridges or equivalent training for conducting scour evaluations; or Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-20 08-05-2026

(b) NHI course in Design and Evaluation of Bridges for Fatigue and Fracture or equivalent training for conducting fatigue and fracture evaluations; or (c) Course from the Multidisciplinary Center for Earthquake Engineering Research in Seismic Retrofit of Highway Bridges course or equivalent training for conducting seismic screening evaluations. f. Railroad Bridge Supervisor. Demonstrates at least 10 years of supervisory experience similar to that identified in 49 CFR § 237.55 through submission of a personnel qualifications statement identifying similar work experience. g. Quality Management Personnel. Personnel responsible for QC or quality assurance activities associated with the inspection or evaluation of products for service provider assurance shall comply with 23 CFR § 650.313(p). 7. Quality Management. a. Establish and maintain quality management procedures or requirements necessary to ensure bridge inspections conform with inspection standards and criteria, inspection plans, QC procedures, DOE policy, and federal33,34 and state requirements. b. Establish and maintain quality management procedures or requirements necessary to ensure that evaluation products such as calculations, reports, and studies are complete, accurate, and properly checked in accordance with applicable standards.35 The individual conducting the QC review must verify compliance with applicable references and criteria, that reasonable assumptions were used, and results were properly applied. The QC review of each evaluation product must include an engineering technical review for accuracy of calculations and appropriateness of methods applied. c. Ensure service provider’s inspection and evaluation activities include independent36 quality assurance (QA) processes necessary to assure that QC activities are accomplished as planned and that those activities are effective in producing a product that meets the desired end quality. d. Develop and execute a Plan of Corrective Actions (PCA) when quality management activities or an external review reveals that activities and systems do not comply with requirements. 33 23 CFR § 650.313, Inspection Procedures 34 49 CFR § 237.111, Review of bridge inspection reports 35 49 CFR § 237.71, Determination of bridge load capacities 36 Independent means the reviewer did not participate or assist in any of the inspection activities Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-21 e. Develop, document, and implement methods to determine that each member of the bridge and tunnel inspection organization holds current qualifications. Document the method by which each Inspection Team Leader or Railroad Bridge. Inspector qualified for the role. Submit Inspection Team Leader or Railroad Bridge Inspector qualifications to the DOE BTM. f. Develop, document, and implement methods to determine when an Inspection Team Leader’s qualification must meet 23 CFR § 650.509(b)(4) in order to adequately and appropriately lead an inspection of a complex tunnel or a tunnel with distinctive features or functions. At a minimum, the process must consider a tunnel’s type of construction, functional systems, history of performance, and physical and operational conditions. 8. Records and Reporting. a. Document the education, experience, licensure, certifications, and training of each qualified personnel member in the bridge or tunnel file.

b. Document inspection activities to include inspection planning, inspection field documentation, inspection report and recommendations, QC/QA documents and checklists, follow-up to critical findings report with status reports, and all other documents related to each inspection. c. Document recommendations for corrective actions intended to ensure the safety and integrity of the bridge, culvert, or tunnel; to maintain it in good condition; and to extend its service life. For each recommendation provide an estimated cost and timeframe to complete. d. Prepare and submit SI&A data following each inspection in accordance with national standards37,38 and Departmental guidance, for all public- and controlled-access bridges to the DOE BTM e. Prepare and submit NTI data items following each inspection in accordance with national standards39 and Departmental guidance to the DOE BTM. f. Document inspection and evaluation used to assess the condition, functionality, safety, or vulnerability of the bridge, culvert, or tunnel. (1) Each report will include a cover page; a title page; an executive summary stating the purpose of the evaluation; overall results, and recommendations, such as additional analyses, repairs, monitoring, or load posting; a list of assumptions used; and all calculations and supporting documentation. 37 FHWA Specifications for the National Bridge Inventory, March 2022 38 FHWA Metrics for the Oversight of the National Bridge Inspection Program, May 2017 and revisions 39 FHWA Specifications for the National Tunnel Inventory, and revisions Attachment 2 – Federal Employees and Contractors DOE O 437.1B Page 2-22 08-05-2026 (2) Each report will specifically note recommended entries for NBI or NTI data items when related. (3) The performing registered Professional Engineer and Quality Management Personnel shall seal and sign any inspection report and evaluation product. (4) Include personnel qualifications for each qualified personnel responsible for or associated with the inspection or evaluation report. g. Prepare40 and maintain a bridge or tunnel file for each bridge, vehicular tunnel, and culvert in local records and in the FIMS. h. Submit documentation and complete notifications in a timely manner to the Site and/or Field Office Manager. Adhere to the following submission dates: (1) Initial SI&A data or NTI data within 90 days of completing construction, rehabilitation, or repair. (2) Inspection reports with SI&A or NTI data within 90 days of the inspection. This may be extended to 180 days with approval from the Site and/or Field Office Manager. (3) Load rating report or scour evaluation report within 90 days of completing the evaluation. When load rating report includes determination to post, provide a sign installation schedule or photo of completed installation. (4) PCA within 30 days of non-compliance notification. For each deficiency cited, the PCA must include: (a) The deficiency and date of notification; (b) A description of the action and schedule required to resolve the deficiency; and (c) A procedure for periodically reporting status updates, milestone completions, and completion of corrective actions to cognizant line management and the DOE BTM.

(5) Notification within 7 days of the determination to close a bridge based on scour. Include evidence of bridge closure and an initial plan of action to mitigate impact on site operations. Submit a scour critical plan of action within 30 days of determination. Submit POA close-out report documenting completion of countermeasures and revised codes for NBI Items B.C.11 (Scour Condition Rating), B.AP.02 (Overtopping Likelihood), B.AP.03 (Scour Vulnerability), and B.AP.03 (Scour POA) once complete. 40 See the Section 2 of the AASHTO Manual for Bridge Evaluation for specific information to include in the Bridge File Attachment 2 – Federal Employees and Contractors DOE O 437.1B 08-05-2026 Page 2-23 (6) Initial follow-up to critical findings report within 24 hours of discovery. Submit a follow-up to critical findings report detailing the intended recovery strategy within 30 days of initial report. Thereafter, provide status reports on follow-up to critical findings report quarterly through finding resolution. (7) Notification no less than 30 days in advance of the anticipated delay that an inspection will not occur within the established interval. (8) Data to support FHWA metrics compliance assessments, as requested. (9) Report within 90 days of completing any seismic vulnerability evaluation, traffic volume data collection, or any other engineering studies or evaluations. i. Use DOE standard document formats and reporting tools when available. Find standard reporting tools and templates as well as quality management checklists at: https://powerpedia.energy.gov/wiki/Bridge_Management_Program or Energy Hub. 9. Inventory and Asset Management. a. Integrate requirements for bridge and tunnel management with existing operating and management procedures. b. Develop, document, and implement procedures to take action to address recommendations for corrective actions intended to ensure the safety and integrity of the bridge, culvert, or tunnel; to maintain it in good condition; and to extend its service life. For each recommendation provide an estimated cost and timeframe to complete. c. When available resources are inadequate to maintain an acceptable level of bridge, culvert, or tunnel safety, act to impose lane or load restrictions, or closures. d. Establish, document, and implement protocols for responding to a critical finding. e. Establish, document, and implement protocols for managing permit loads. f. Develop, document, and implement bridge closure and reopening procedures. Once closed, a bridge may not be reopened until repairs are complete and a qualified engineer determines that the bridge is safe and, if necessary, posted. g. Develop, document, and implement procedures and issue instructions41 to personnel responsible for train operations to prevent operation of equipment that would exceed the capacity of the bridge. 41 49 CFR § 237.73, Protection of bridges from over-weight and over-dimension loads. DOE O 437.1B Attachment 3 – Federal Employees and Contractors 08-05-2026 Page 3-1 ATTACHMENT 3 DEFINITIONS This Attachment provides information associated with Department of Energy (DOE) Order (O) 437.1B as well as information applicable to contracts in which the associated Contractor Requirements Document (Attachment 1 to DOE O 437.1B) is inserted. 1. Anticipated Service Life (ASL). Selection of the anticipated service life is the responsibility of the Responsible Engineer in consultation with site management. See Federal Highway Administration (FHWA)-HRT-06-032, Seismic Retrofitting Manual for Highway Structures, Part 1—Bridges, January 2006.

2. Average Daily Traffic. The average volume of traffic for the average 1-day (24-hour) period during a data reporting year at a specific location or specific segment of road. See FHWA Traffic Monitoring Guide, December 2022. 3. Annual Average Daily Traffic. The total annual volume of traffic passing a point or segment of a highway in both directions, divided by the number of days in a year. See FHWA-HIF-22-017, Specifications for the National Bridge Inventory, March 2022. 4. Annual Average Daily Truck Traffic. The total annual volume of truck traffic passing a point or segment of a highway in both directions divided by the number of days in a year. FHWA-HIF-22-017, Specifications for the National Bridge Inventory, March 2022. 5. Bridge. See vehicle bridge, pedestrian bridge or railroad bridge. 6. Bridge Evaluation. An assessment of the performance of an existing bridge. See AASHTO, Manual for Bridge Evaluation, 3rd Edition, 2018. 7. Bridge or Tunnel File. A full history of the structure, including all design, construction, maintenance, repair, rehabilitation, use, and damage records. The bridge or tunnel file contains inventory data, inspection, testing, and evaluation records, load rating and evaluation data and reports. See AASHTO, Manual for Bridge Evaluation, 3rd Edition, 2018. 8. Bridge Inspection Report. An inspection-specific summary including information pertinent to bridge inventory management. The report serves as a summary of the inspection, inspection findings, and recommendations; as a historical record for future reference; and, as a legal record that documents inspection activity. 9. Bridge or Tunnel Inspection. Determination of the physical and functional condition of a bridge, tunnel, or culvert by identifying, quantifying, and documenting existing defects, performed by qualified technical personnel familiar with relevant methods and procedures, tools and equipment, safety requirements, and documentation practices. 10. Bridge or Tunnel Inspection Findings. Observations or measurements describing the overall condition of the bridge or tunnel and defects collected during an inspection. Attachment 3 – Federal Employees and Contractors DOE O 437.1B Page 3-2 08-05-2026 11. Bridge and Tunnel Inspection Organization. Personnel assigned responsibility for implementing the DOE bridge management requirements or who conduct inspections or evaluations. 12. Bridge or Tunnel Inspection Report Recommendations. Corrective actions intended to ensure the safety and integrity of the bridge, culvert, or tunnel; to maintain it in good condition; and, to extend its service life. Actions may include additional inspection or evaluation, maintenance and repair, modernization, or operational activities. 13. Complex Feature. Bridge components or members with advanced or unique structural members or operational characteristics, construction methods, and/or requiring specific inspection procedures. This includes mechanical and electrical elements of moveable spans and cable-related members of suspension and cable-stayed superstructures. 14. Countermeasures. Materials or systems intended to prevent, delay, or reduce the severity scour and stream instability. 15. Critical Finding. A structural or safety related deficiency that requires immediate action to ensure public safety. See 23 CFR § 650.305. Levels of Critical Findings and corresponding response times follow:

a. Emergency: Used to report the failure or imminent failure of a critical primary structural component. An emergency critical finding means that a failure is likely within a short time period. A reinspection or repair should be scheduled, and the structure may require a prompt interim action, load posting, or closure. Immediate action required. b. Urgent: Used to report a potentially hazardous condition, which, if left unattended beyond the next anticipated inspection, would likely become dangerous to persons or property. Also used to report the actual or imminent failure of a non-critical structural component. Such failures may reduce the reserve capacity or redundancy of the structure but would not result in a structural collapse. A reinspection or repair should be scheduled, and the structure may require load posting. Action required prior to next routine inspection. 16. Critical Findings Protocols. A site-specific plan minimally identifying: a. Members of the Critical Findings team and alternates; b. Team member contact information and responsibilities; c. Procedures for notifying team members upon discovery of a critical finding; DOE O 437.1B Attachment 3 – Federal Employees and Contractors 08-05-2026 Page 3-3 d. Procedures for notifying: (1) Local agencies, (2) Local law enforcement agencies, and the Public Affairs Officer where local roads and traffic are affected, (3) Site/Program leadership and the DOE Bridge and Tunnel Manager (BTM), e. Procedures for implementing temporary measures; and f. Guidelines on timeliness of actions, reporting requirements, and documentation procedures. 17. Culvert. A transverse structure, pipe, or series of multiple pipes, boxes, or arches constructed to convey water or utilities under a road or railway. a. Culvert assets under a road with a structure length equal to or greater than 20 linear feet meet the FHWA definition of a bridge. These assets are inventoried in Facilities Information Management System (FIMS) with Usage Code 1768 or 1769. b. Culvert assets under railway with a structure length equal to or greater than 10 feet and located at such a depth that it is affected by live loads meet the Federal Railroad Administration (FRA) definition of a bridge. These assets are inventoried in FIMS with Usage Code 1468 or 1469. c. Culvert assets with a structure length less than FHWA or FRA bridge length and an opening area of more than 20 square feet are inventoried in FIMS with Usage Code 2629. The FIMS Users Guide provides addition guidance for selecting real property asset usage codes. 18. Design Strength. The capacity of the structure or structural member being designed or analyzed (i.e., the nominal strength) multiplied by the appropriate resistance factor. 19. DOE Elements. Headquarters elements or first-tier organizations as listed in the Correspondence Style Guide, Office of the Executive Secretariat. [DOE O 251.1, Department Directives Program, current version] 20. Elevated Walkway. See pedestrian bridge. 21. Graded Approach. The process of ensuring that the levels of analyses, documentation, and actions used to comply with requirements are commensurate with: the relative importance to safety, safeguards, and security; the magnitude of any hazard involved; the life-cycle stage of a facility or item; the programmatic mission of a facility; the particular characteristics of a facility or item; the relative importance to radiological and non-radiological hazards; and, any other relevant factors. See 10 CFR § 830.3.

Attachment 3 – Federal Employees and Contractors DOE O 437.1B Page 3-4 08-05-2026 22. Inspection—Damage. Unscheduled inspection to access structural damage resulting from environmental factors or human actions. See 23 CFR § 650.305. Analogous to a special or emergency inspection for railroad bridges. See AREMA Manual for Railway Engineering. 23. Inspection—Nonredundant Steel Tension Member (NSTM). A type of in-depth inspection conducted at regularly scheduled intervals specifically to inspect NSTMs or member components. It requires close-up access, hands-on inspection, and may require non-destructive testing by qualified personnel to determine location and extent of cracking or other defects. See 23 CFR § 650.305. 24. Inspection—In-Depth. A hands-on, closeup inspection of one or more structure elements above or below the water level to identify any deficiencies not readily detectible using routine inspection procedures. An in-depth inspection is also used to identify developing problems that impact present service requirements or to obtain detailed information needed to facilitate the preparation of structure rehabilitation plans. This inspection may result in a full investigation, including structural analysis to determine member capacity that will be used in a revised load rating. It may be performed independently from a routine inspection at intervals other than 24 months. It can be at a longer interval or one time only. Analogous to a special inspection for railroad bridges. See 23 CFR § 650.305. 25. Inspection—Hands-on. A visual or manual inspection technique made at a distance no greater than arm’s length from the entire member or member component surface. Includes examination of all surfaces of the members and member components. May require use of specialized equipment to access members or member components. See 23 CFR § 650.305. 26. Inspection—Initial. Inspection conducted after construction or rehabilitation of a bridge or when the configuration or geometry of the structure changes (examples include widening, lengthening, and change in vertical clearance). It is the baseline inspection with which all future inspections will be compared. Performance may be coincident with the final construction inspection but must be done by a qualified inspection team. See 23 CFR § 650.305. 27. Inspection—Routine. Regularly scheduled inspection consisting of observations and/or measurements needed to determine the physical and functional condition of the bridge, to identify any changes from initial or previously recorded conditions and to ensure that the structure continues to satisfy present service requirements. See 23 CFR § 650.305. Analogous to a periodic inspection for railroad bridges. See AREMA Manual for Railway Engineering, current edition, updated annually. 28. Inspection—Special. An inspection scheduled at the discretion of the bridge owner, used to monitor a particular known or suspected deficiency. See 23 CFR § 650.305. Analogous to an interim inspection for railroad bridges. See AREMA Manual for Railway Engineering, current edition, updated annually. DOE O 437.1B Attachment 3 – Federal Employees and Contractors 08-05-2026 Page 3-5 29. Inspection—Underwater. Inspection of the underwater portion of a bridge substructure and the surrounding channel, which cannot be inspected visually at low water by wading or probing, generally requiring diving or other appropriate techniques. See 23 CFR § 650.305.

30. Inspection Team Leader. Individual in charge of an inspection team responsible for planning, preparing, and performing field inspection of the bridge. See 23 CFR § 650.305, Subpart C, and 23 CFR § 650.505, Subpart E. 31. Length. The measured opening along the center of the structure between under copings of abutments or spring lines of arches, or extreme ends of openings for multiple boxes. It includes multiple pipes where the clear distance between openings is less than half of the smaller contiguous opening. For vehicular bridges, also known as National Bridge Inspection Standards (NBIS) bridge length. See FHWA-HIF-22-017, Specifications for the National Bridge Inventory, March 2022. 32. Load and Resistance Factor Design. A design method used by AASHTO, based on limit states of material with increased loads and reduced member capacity based on statistical probabilities. See FHWA Bridge Inspector’s Reference Manual, FHWA-NHI-23-024, March 2023. 33. Load Rating. The analysis to determine the safe vehicular live load carrying capacity of a bridge using bridge plans and supplemented by measurements and other information gathered from an inspection. See 23 CFR § 650.305. 34. National Bridge Inventory. A database of structure inventory and appraisal data collected by each state or federal bridge-owning agency to fulfill the requirements of the NBIS. See 23 CFR § 650.305. 35. National Bridge Inventory Bridge or Reportable Bridge. A structure, including supports, erected over a depression or an obstruction, such as water, highway, or railway, and having a track or passageway for carrying traffic or other moving loads, and having an opening measured along the center of the roadway of more than 20 feet between under copings of abutments or spring lines of arches, or extreme ends of openings for multiple boxes; it includes multiple pipes, where the clear distance between openings is less than half of the smaller contiguous opening. See 23 CFR § 650.305, Subpart C. 36. National Bridge Inspection Standards. The national standard for the proper safety inspection and evaluation of all highway bridges. See 23 CFR § 650.305. 37. National Tunnel Inventory. A database maintained by the FHWA containing inventory and inspection data for all highway tunnels located on public roads, on and off federal-aid highways. 38. Non-Destructive Testing. Any of a variety of methods used to assess the strength and condition of materials or structural components of a real property asset that does not result in any damage or change to the material or part under examination. Attachment 3 – Federal Employees and Contractors DOE O 437.1B Page 3-6 08-05-2026 39. Nonredundant Steel Tension Member. A primary steel member fully or partially in tension, and without load path redundancy, system redundancy or internal redundancy, the failure of which may cause a portion of or the entire bridge to collapse. See 23 CFR § 650.305. 40. Pedestrian Bridge. A structure that carries primarily pedestrian, bicycle, and equestrian traffic but may include light maintenance vehicles over a chasm, waterway, ditch, or other obstacle or convey pedestrian traffic from one building or structure to another including enclosed walkways. It does not include work or machinery platforms, stairways, platforms, boardwalks, or docks or similar type structures.

41. Performance Level or Performance Criteria. A level of performance, expressed in terms of post-earthquake service and damage, expected to be achieved during and immediately following an earthquake of a specified size. See FHWA-HRT-06-032, Seismic Retrofitting Manual for Highway Structures, Part 1—Bridges, January 2006. 42. Permit Load. A vehicle or load that exceeds the legal size or weight limits established by each state for operation on state roads. Each state has established procedures for reviewing the safety and serviceability of bridges along the planned route and for providing permission for transit. 43. Plan of Corrective Action. Written plan identifying individual deficiencies or areas where bridge and tunnel management does not comply with federal or Departmental policy. It describes actions required to correct each deficiency and the schedule for completing each action. [Adapted from FHWA memorandum HIBS-30, “National Bridge Inspection Standards Plan of Corrective Action(s) Guidelines,” January 3, 2017.] 44. Prompt Interim Action. Any action, including repairs, load limits, or partial or full bridge closure, that is enacted to alleviate a significant safety problem on the bridge. Prompt means as soon as possible or practical given the conditions and consequences of inaction. Interim means that the action may be temporary but is to the extent necessary to ensure safe use of the bridge. 45. Professional Engineer. An individual, who has fulfilled education and experience requirements and passed examinations for professional engineering and/or structural engineering license that, under state licensure laws, permits the individual to offer engineering services within areas of expertise directly to the public. 46. Public Road. Any road or street under the jurisdiction of and maintained by a public authority and open to public travel. See 23 U.S.C. § 101(a)(23). 47. Qualified Personnel. Persons performing an inspection or evaluation who meet the qualification requirements specific to the inspection or evaluation being conducted and who understand the duties of the role he or she is expected to perform, and who has documented and submitted individual personnel qualifications, including appropriate education, experience, licensure, and certifications, and current training, as required. 48. Railroad Bridge. See 49 CFR § 237.5. DOE O 437.1B Attachment 3 – Federal Employees and Contractors 08-05-2026 Page 3-7 49. Required Strength. Structural capacity needed to meet or exceed the demands put on the structure by the loads. 50. Responsible Engineer. An engineer charged with the overall responsibility for conducting bridge evaluations other than load ratings. This may include scour evaluations, fatigue and fracture evaluations, or seismic evaluations. 51. Scour. Erosion of streambed or bank material or erosion of soil surrounding a bridge foundation due to flowing water. Often the erosion is localized around the bridge piers or abutments. See 23 CFR § 650.305. 52. Scour Appraisal. A risk-based and data-driven determination of a bridge’s vulnerability to scour, resulting from the least stable result of scour that is either observed, or estimated through a scour evaluation or a scour assessment. 53. Scour Assessment. The determination of an existing bridge’s vulnerability to scour which considers stream stability and scour potential as described in HEC 20 and other scour-related data sources.

54. Scour Critical Bridge. A bridge with a foundation that is unstable, or may become unstable, as determined by the scour appraisal. 55. Scour Evaluation. The application of hydraulic analysis as described in HEC 18 and HEC 20 to estimate scour depths and determine bridge and substructure stability considering potential scour. 56. Scour Monitoring Inspection. An inspection performed during or after a triggering storm event as required by a Scour Plan of Action (Scour POA), by personnel with qualifications required by the agency. 57. Scour Plan of Action. Procedures for DOE Site personnel, bridge inspectors, and engineers in managing each bridge determined to be scour critical or that has unknown foundations. The Scour POA should explain why the preferred actions of the procedures were selected, include a scour monitoring plan, possibly a plan for design and construction of countermeasures with a schedule, and a commitment to quarterly progress reporting until corrective actions are satisfied. 58. Seismic Retrofitting Category. Used to recommend minimum screening requirements, evaluation methods and retrofitting measures for deficient bridges. Four categories, A– D, are determined by the anticipated service life, bridge importance, and the seismic and geotechnical hazards at the site. See FHWA-HRT-06-032, Seismic Retrofitting Manual for Highway Structures, Part 1—Bridges, January 2006, and FHWA-HRT-06-032, Seismic Retrofitting Manual for Highway Structures, Part 1—Bridges, January 2006. 59. Service Life. See FHWA-HIF-11042, Bridge Preservation Guide, Spring 2018. 60. Short-Span Bridge. A vehicular bridge with a structure length less than 20 feet. Attachment 3 – Federal Employees and Contractors DOE O 437.1B Page 3-8 08-05-2026 61. Structure Inventory and Appraisal Data. Data recorded and stored for each bridge as standardized by the FHWA to effectively monitor and manage a bridge inventory. For data submissions guidelines see FHWA-HIF-22-017, March 2022. 62. Tunnel—Controlled-Access Vehicular. Enclosed roadway for motor vehicle and pedestrian traffic with vehicle access limited to portals, regardless of type of structure or method of construction. May include lighting, ventilation, fire protection systems, and emergency egress capacity. 63. Tunnel—Pedestrian. An underground passageway, dug through the surrounding soil, earth, or rock and enclosed except for entrance and exit, commonly at each end, and used exclusively for pedestrian or bicycle traffic. It does not include vehicular tunnels that have sidewalks. A tunnel used by both vehicles and pedestrians should be counted in one of the vehicular tunnel categories. A similar tunnel between two buildings may be inventoried with one of the buildings. 64. Tunnel—Public Access Vehicular. Enclosed roadway for motor vehicle traffic with vehicle access limited to portals, regardless of type of structure or method of construction, and located on a public road. May include lighting, ventilation, fire protection systems, and emergency egress capacity. 65. Tunnel—Train. Tunnel used exclusively by trains. 66. Vehicle Bridge. A structure, including supports, erected over a depression or an obstruction, such as water, highway, or railway, and having a track or passageway for carrying traffic or other moving loads. a. Controlled-Access Vehicle Bridge. A vehicle bridge where a traveler must pass through a staffed entry point and present identification to traverse this structure. These structures are not included in the National Bridge Inventory.

b. Public-Access Vehicle Bridge. A vehicle bridge where a traveler may traverse the structure without ever passing through a staffed entry point or presenting identification. Public-access vehicle bridges with a structure length of more than 20 feet will be included in the National Bridge Inventory unless permanently closed. DOE O 437.1B Attachment 4 – Federal Employees and Contractors 08-05-2026 Page 4-1 ATTACHMENT 4 ACRONYMS AADT Annual average daily traffic AADTT Annual average daily truck traffic AASHTO American Association of State Highway and Transportation Officials ADCI Association of Diving Contractors International ADT Average daily traffic ADTT Average daily truck traffic ANSI/EIA American National Standards Institute/Electronic Industries Alliance AREMA American Railway Engineering and Maintenance-of-Way Association ASCE American Society of Civil Engineers BTM (DOE) Bridge and Tunnel Manager CO Contracting Officer CFR Code of Federal Regulations CRD Contractor Requirements Document DOE Department of Energy EO Executive Order FHWA Federal Highway Administration FIMS Facilities Information Management System FRA Federal Railway Administration HEC Hydraulic Engineering Circular LRFD Load and resistance factor design M&O Management and operating NBI National Bridge Inventory NBIS National Bridge Inspection Standards NHI National Highway Institute Attachment 4 – Federal Employees and Contractors DOE O 437.1B Page 4-2 08-05-2026 NNSA National Nuclear Security Administration NSTM Nonredundant steel tension member NTI National Tunnel Inventory PCA Plan of corrective action PMA Power Marketing Administration POA Plan of action PSO Program Secretarial Officer QA Quality assurance QC Quality control SHL Seismic Hazard Level SI&A Structure inventory and appraisal SNBI Specifications for the National Bridge Inventory