Title 23HighwaysRelease 119-73

§169 Development of programmatic mitigation plans

Title 23 › Chapter CHAPTER 1— - FEDERAL-AID HIGHWAYS › § 169

Last updated Apr 6, 2026|Official source

Summary

States or metropolitan planning organizations can create one or more programmatic mitigation plans to deal with likely environmental effects of future transportation projects. The plans can be made at regional, ecosystem, watershed, or statewide levels. They can cover many types of resources or just one (for example, water, parks, or wildlife), and can apply to all projects in an area or only certain kinds. The planning agency must set the plan’s scope after talking with the agencies that manage the resources. Plans can include a short resource condition check (including trends and threats), ideas for improving resources through strategic mitigation, standard mitigation actions and rules (like ratios or site criteria), monitoring and adaptive management steps, and notes about legal requirements. Before adopting a plan, the planning agency must consult the resource agencies, share a draft for agency and public review, consider comments received, and address them in the final plan. The plan can be combined with other planning documents. Federal agencies doing environmental reviews, permits, or approvals must give substantial weight to the plan’s recommendations under NEPA and other federal environmental laws. This does not limit using programmatic approaches for NEPA reviews.

Full Legal Text

Title 23, §169

Highways — Source: USLM XML via OLRC

(a)As part of the statewide or metropolitan transportation planning process, a State or metropolitan planning organization may develop 1 or more programmatic mitigation plans to address the potential environmental impacts of future transportation projects.
(b)(1)A programmatic mitigation plan may be developed on a regional, ecosystem, watershed, or statewide scale.
(2)The plan may encompass multiple environmental resources within a defined geographic area or may focus on a specific resource, such as aquatic resources, parkland, or wildlife habitat.
(3)The plan may address impacts from all projects in a defined geographic area or may focus on a specific type of project.
(4)The scope of the plan shall be determined by the State or metropolitan planning organization, as appropriate, in consultation with the agency or agencies with jurisdiction over the resources being addressed in the mitigation plan.
(c)A programmatic mitigation plan may include—
(1)an assessment of the condition of environmental resources in the geographic area covered by the plan, including an assessment of recent trends and any potential threats to those resources;
(2)an assessment of potential opportunities to improve the overall quality of environmental resources in the geographic area covered by the plan, through strategic mitigation for impacts of transportation projects;
(3)standard measures for mitigating certain types of impacts;
(4)parameters for determining appropriate mitigation for certain types of impacts, such as mitigation ratios or criteria for determining appropriate mitigation sites;
(5)adaptive management procedures, such as protocols that involve monitoring predicted impacts over time and adjusting mitigation measures in response to information gathered through the monitoring; and
(6)acknowledgment of specific statutory or regulatory requirements that must be satisfied when determining appropriate mitigation for certain types of resources.
(d)Before adopting a programmatic mitigation plan, a State or metropolitan planning organization shall—
(1)consult with each agency with jurisdiction over the environmental resources considered in the programmatic mitigation plan;
(2)make a draft of the plan available for review and comment by applicable environmental resource agencies and the public;
(3)consider any comments received from such agencies and the public on the draft plan; and
(4)address such comments in the final plan.
(e)A programmatic mitigation plan may be integrated with other plans, including watershed plans, ecosystem plans, species recovery plans, growth management plans, and land use plans.
(f)If a programmatic mitigation plan has been developed pursuant to this section, any Federal agency responsible for environmental reviews, permits, or approvals for a transportation project shall give substantial weight to the recommendations in a programmatic mitigation plan when carrying out the responsibilities under the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.) or other Federal environmental law.
(g)Nothing in this section limits the use of programmatic approaches to reviews under the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.).

Legislative History

Notes & Related Subsidiaries

Editorial Notes

References in Text

The National Environmental Policy Act of 1969, referred to in subsecs. (f) and (g), is Pub. L. 91–190, Jan. 1, 1970, 83 Stat. 852, which is classified generally to chapter 55 (§ 4321 et seq.) of Title 42, The Public Health and Welfare. For complete classification of this Act to the Code, see

Short Title

note set out under section 4321 of Title 42 and Tables.

Amendments

2015—Subsec. (f). Pub. L. 114–94 substituted “shall give substantial weight to” for “may use” and inserted “or other Federal environmental law” before period at end.

Statutory Notes and Related Subsidiaries

Effective Date

of 2015 AmendmentAmendment by Pub. L. 114–94 effective Oct. 1, 2015, see section 1003 of Pub. L. 114–94, set out as a note under section 5313 of Title 5, Government Organization and Employees.

Effective Date

Section effective Oct. 1, 2012, see section 3(a) of Pub. L. 112–141, set out as an Effective and Termination Dates of 2012 Amendment note under section 101 of this title.

Reference

Citations & Metadata

Citation

23 U.S.C. § 169

Title 23Highways

Last Updated

Apr 6, 2026

Release point: 119-73