StacksVerified U.S. regulatory reference

23 CFR Part 773, Appendix A

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov

NEPA, 42 U.S.C. 4321 et seq.

Regulations for Implementing the Procedural Provisions of NEPA at 40 CFR parts 1500-1508.

FHWA/FTA environmental regulations at 23 CFR part 771.

FRA's Procedures for Considering Environmental Impacts, 64 FR 28545, May 26, 1999 and 78 FR 2713, Jan. 14, 2013.

Clean Air Act, 42 U.S.C. 7401-7671q. Any determinations that do not involve conformity.

Efficient Environmental Reviews for Project Decisionmaking, 23 U.S.C. 139.

Noise Control Act of 1972, 42 U.S.C. 4901-4918.

Airport Noise and Capacity Act of 1990, 49 U.S.C. 47521-47534.

FHWA noise regulations at 23 CFR part 772.

Endangered Species Act of 1973, 16 U.S.C. 1531-1544.

Marine Mammal Protection Act, 16 U.S.C. 1361-1423h.

Anadromous Fish Conservation Act, 16 U.S.C. 757a-757f.

Fish and Wildlife Coordination Act, 16 U.S.C. 661-667d.

Migratory Bird Treaty Act, 16 U.S.C. 703-712.

Magnuson-Stevens Fishery Conservation and Management Act of 1976, as amended, 16 U.S.C. 1801-1891d.

National Historic Preservation Act of 1966, 16 U.S.C. 470 et seq.

Archaeological Resources Protection Act of 1979, 16 U.S.C. 470aa-470mm.

Archeological and Historic Preservation Act, 16 U.S.C. 469-469c.

Native American Graves Protection and Repatriation Act, 25 U.S.C. 3001-3013; 18 U.S.C. 1170.

American Indian Religious Freedom Act, 42 U.S.C. 1996.

Farmland Protection Policy Act, 7 U.S.C. 4201-4209.

Clean Water Act, 33 U.S.C. 1251-1387.

Section 404, 33 U.S.C. 1344

Section 401, 33 U.S.C. 1341

Section 319, 33 U.S.C. 1329

Coastal Barrier Resources Act, 16 U.S.C. 3501-3510.

Coastal Zone Management Act, 16 U.S.C. 1451-1466.

Safe Drinking Water Act, 42 U.S.C. 300f—300j-26.

Rivers and Harbors Act of 1899, 33 U.S.C. 403.

Wild and Scenic Rivers Act, 16 U.S.C. 1271-1287.

Emergency Wetlands Resources Act, 16 U.S.C. 3901 and 3921.

Wetlands Mitigation, 23 U.S.C. 119(g) and 133(b)(14).

FHWA wetland and natural habitat mitigation regulations at 23 CFR part 777.

Flood Disaster Protection Act, 42 U.S.C. 4001-4130.

Section 4(f), 49 U.S.C. 303; 23 U.S.C. 138.

FHWA/FTA Section 4(f) regulations at 23 CFR part 774.

Land and Water Conservation Fund, 16 U.S.C. 460l-4-460l-11

Comprehensive Environmental Response, Compensation, and Liability Act, 42 U.S.C. 9601-9675.

Superfund Amendments and Reauthorization Act of 1986, 42 U.S.C. 9671-9675.

Resource Conservation and Recovery Act, 42 U.S.C. 6901-6992k.

E.O. 11990, Protection of Wetlands

E.O. 11988, Floodplain Management

E.O. 12898, Federal Actions to Address Environmental Justice in Minority Populations and Low Income Populations

E.O. 13112, Invasive Species