• AASHTO Practitioner’s Handbook #11: Complying with Section 4(f) of the U.S. DOT Act (May 2009)
• AASHTO Practitioners Handbook #6: Consulting Under Section 106 of the National Historic Preservation Act (February 2007)

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Section 4(f) and Section 106

• Final Nationwide Section 4(f) Evaluation and Approval for Federally-Aided Highway Projects with Minor Involvements with Historic Sites [PDF 381kb], (December 23, 1986)
• Programmatic Section 4(f) Evaluation and Approval for FHWA Projects that Necessitate the Use of Historic Bridges [PDF 380kb], (July 5, 1983)
• National Evaluations for Projects with Minor Section 4(f) Involvements [PDF 87kb], (December 23, 1986)

Tribal Consultation

• DOT Order 5301.1 - Department of Transportation Programs, Policies, and Procedures Affecting American Indians, Alaska Natives, and Tribes, November 16, 1999 [PDF 106kb]
• INFORMATION Memorandum: Working With Tribal Governments on Historic Preservation Effort, (August 7, 2001)

Historic Bridges

• INFORMATION Memorandum Interpretation of Title 23, Section 144(o) Reasonable Costs Associated With the Demolition of Historic Bridges. (April 26, 2001)
• Memorandum: Surface Transportation and Uniform Relocation Assistance Act of 1987 Section 123(f) Historic Bridges [PDF 465kb], (July 22, 1987)

General Research, Documents and Report

• Memorandum: Programmatic Agreement on Transportation Enhancements [PDF 482kb], (June 11, 1997)
• Memorandum: Eligibility of Historic Preservation Work for Transportation Enhancement Funding [PDF 167kb], (June 6, 1995)
• Memorandum: Issuance of New Regulation on Curation of Archeological Collections (36 CFR Part 79) [PDF 56kb], (November 26, 1990)
• Memorandum: ACHP Guidance Document on Working with Section 106 [PDF 116kb]
• Memorandum: Section 106 Policy Guidance Interpretation of Setting [PDF 107kb], (August 30, 1989)
• Memorandum: Section 106 Policy Guidance Interpretation of Setting [PDF 421kb], (December 5, 1989)
• Memorandum: FHWA Guidance on the Consideration of Historic and Archeological Resources in the Highway Project Development Process [PDF 1.53mb], (December 23, 1988)
• Memorandum of Understanding: Emergency Procedures Applicable to Unanticipated Cultural Resources Discovered During Construction of Federal-Aid Highways [PDF 143kb], (September 23, 1980)

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Section 106

• Section 106 Case Digest Index (February 2009)
• Regulations Text (August 2004)
• Regulations Summary (April 2002)
• Regulations Flow Chart and Explanatory Material (February 2001)
• Section-by-Section Questions and Answers (April 2002)
• Citizen's Guide to Section 106 Review (October 2003)
• "Using Section 106 to Protect Historic Properties" (May 2003)
• Extension of Emergency Provisions under 36 CFR Part 800.12 
• Section 106 Consultation Involving National Historic Landmarks 
• Federal Alternate Procedures 
• Fees in the Section 106 Review Process 
• Section 106 Archeology Guidance
• ACHP Exemption Regarding Historic Preservation Review Process for Effects to the Interstate Highway System [PDF 64kb]

Tribal Consultation

• ACHP Policy Statement Regarding ACHP's Relationships with Indian Tribes 
• Consulting with Indian Tribes in the Section 106 Review Process 
• Native Hawaiian Organizations and the Section 106 Review Process 
• Relationship Between E.O. 13007 Regarding Indian Sacred Sites and Section 106 
• Policy Statement Regarding Treatment of Burial Sites, Human Remains, and Funerary Objects (February 2007)

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• Minnesota Department of Transportation's Deeply Buried Archaeological Site Testing Protocol Project

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• Compendium of Environmental Fieldwork Technologies, NCHRP 25-25, Task 48 (October 2009)
• Guidelines for Historic Bridge Rehabilitation and Replacement, NCHRP Project 25-25, Task 19 (March 2007)
• A Guide to Incorporating Geophysical Remote Sensing in Transportation Archeological Investigations, NCHRP Project 25-25, Task 21 (September 2006)
• Managing Archeological Investigations, A Synthesis of Highway Practices, NCHRP Synthesis Report 347
• Transportation Research Circular Number E-C055, August 2003, National Forum on Assessing Historic Significance for Transportation Programs, May 23-25, 1999.
• Evaluating Cultural Resource Significance: Implementation Tools, National Cooperative Highway Research Program, Report 542
• Tribal Transportation Programs, NCHRP Synthesis Report 366 (March 2007)

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Federal Highway Administration Policies, Guidance, and Programs

• FHWA’s Historic Bridges Web site - Includes links to FHWA bridge programs, state programs, and other resources on historic bridges.
• FHWA Highway Bridge Replacement and Rehabilitation Program 
• Information Memorandum: Interpretation of Title 23, Section 144(o) Reasonable Costs Associated with the Demolition of Historic Bridges (April 26, 2001)

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National Register Eligibility Evaluations: State Historic Bridge Inventories, Databases and Historic Contexts

• California Department of Transportation Historic Bridge Inventory 
• Colorado Department of Transportation Historic Bridge Program 
• Connecticut Historic Bridge Survey, Inventory – Phase Final Report [PDF 466kb], December 1990, Connecticut Department of Transportation.
• Historic Bridges of Connecticut 
• Connecticut’s Open Spandrel Concrete Bridges 
• Delaware’s Historic Bridges 
• Historic Highway Bridges of Florida (Note: this is a very large file)
• Indiana Historic Bridges Inventory Summary and Results
• Indiana Bridges Historic Context Study, 1830s – 1965
• Iowa Department of Transportation, Historic Bridges of Iowa 
• Historic Highway Bridges in Maryland: 1631-1960, Historic Context Report 
• Historic Bridges of Maryland
• Massachusetts Historic Bridge Inventory
• Michigan’s Historic Bridges 
• Minnesota’s Historic Bridges 
• National Register Evaluation of Nebraska Historic Bridges 1947 – 1965 (including the reassessment of select pre-1947 bridges)
• Historic Bridges of Nebraska 
• Historic Context and National Register Evaluation of New Mexico Department of Transportation Historic Bridges [Note: Not all historic bridges in the New Mexico DOT system are listed in this document. For a more comprehensive list, see historic bridge programmatic agreement.]
• New York State Historic Bridge Inventory 
• Ohio Department of Transportation: Historic Bridges
  • The First Historic Bridge Inventory
  • The Second Historic Bridge Inventory (1941-1950)
  • The 1994 Concrete Arch Supplement
  • Third Historic Bridge Inventory (1951-1960)
• Oklahoma Department of Transportation – A History of Oklahoma Highway Bridges 
• Historic Bridges of Oregon 
• Slab, Beam & Girder Bridges in Oregon: Historic Context Statement 
• The Pennsylvania Historic Bridge Survey 
• Vermont Historic Bridge Program 
• Washington State Department of Transportation – Historic Bridges
• A Context for Common Historic Bridge Types – NCHRP 25-25, Task 15, October 2005

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Historic Bridge Programmatic Agreements

• Programmatic Agreement Regarding the Management and Preservation of Colorado Historic Bridges 
• Programmatic Agreement for the Management and Preservation of Indiana’s Historic Bridges
• Ohio Historic Bridge Programmatic Agreement 
• Minnesota Historic Bridge Programmatic Agreement
  • Appendix A: Eligible Pre-1956 Bridge List
  • Appendix B: Bridges to Preserve
• Programmatic Agreement Regarding Historic Roads and Bridges Affected by Montana Department of Transportation Undertakings in Montana 
• Programmatic Agreement Regarding the Management and Preservation of New Mexico DOT Owned Historic Bridges 
• Vermont: Programmatic Agreement Regarding Implementation of a Program for Projects Involving Historic Bridges 

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Historic Bridge Management and Treatment Plans

• Connecticut Historic Bridge Inventory, Final Report: Preservation Plan [PDF 801kb], May 1991, Connecticut Department of Transportation
• Management Plan for Historic Bridges in Minnesota (2006)
• Management Plan – Nebraska 
• New York State Department of Transportation Historic Bridge Management Plan
• Ohio Historic Bridge Preservation Plan 
• Oregon Department of Transportation Historic Bridge Preservation Plan [PDF 22.7mb]
• Pennsylvania Department of Transportation’s Management Plan for Stone Arch Bridges 
• Texas Department of Transportation Historic Bridge Manual, 2006
• Management Plan for Historic Bridges in Virginia

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Historic Bridge Rehabilitation Guidance, Reports

• Idaho Transportation Department Environmental Process Manual, Section 1830.02.07
• Texas: Preservation Alternatives for Historic Truss Bridges, Center for Transportation Research, University of Texas at Austin
• Guidelines for Historic Bridge Rehabilitation and Replacement, National Cooperative Highway Research Program Project 25-25, Task 19
• Best Practices for the Rehabilitation and Moving of Historic Metal Truss Bridges - June 2006, Virginia Transportation Research Council and VDOT
• Washington State Department of Transportation Historic Bridge Rehabilitation Guidelines (Environmental Procedures Manual, Chapter 456, see Exhibit 456.5)

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Historic Bridge Marketing and Reuse Programs

• Indiana DOT Historic Bridge Marketing Program
• Montana Department of Transportation Historic Bridge Adoption
• North Carolina Department of Transportation Bridge Reuse Program
• Pennsylvania Department of Transportation Historic Bridge Marketing 

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General Reports, Documents, and Websites

• Historic Bridge Practices Nationwide: Inventory, Evaluation, and Management - Mead & Hunt in cooperation with the Historic Bridge Alliance(June 2008) NEW
• Historic Bridges: A Heritage at Risk: A Report on a Workshop on the Preservation and Management of Historic Bridges [PDF 367kb]
• Historic Bridge Foundation 
• Historic Bridges of the United States
• Historic Bridges of Michigan and Elsewhere 
• Bridge Terms Definitions, AASHTO Standing Committee on Highways and Subcommittee on Bridges and Structures
• National Historic Covered Bridge Program 

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