S. 4157Senate118th Congress (2023-2025)In Committee

Improving Corps Civil Works Compensatory Mitigation Act

Introduced April 18, 2024

AI-Generated Summary

Updated January 20, 2026 at 4:04 PM UTC

The Improving Corps Civil Works Compensatory Mitigation Act amends the Water Resources Development Act of 1986 to strengthen how fish and wildlife mitigation is handled for Army Corps civil‑works projects. It adds the ability to use contracts as a mitigation tool, defines what a contract means, and ties mitigation to existing state, local, or regional restoration plans. The changes also require the Secretary of the Army to ensure compliance with Corps and EPA mitigation rules.

Key Provisions

  • Defines “contract” as an agreement between the Secretary and a mitigation provider that follows Corps district‑level practices and prioritizes an existing restoration plan for the affected area.
  • Allows contracts (in addition to other instruments) to be used for compensatory mitigation under the Act.
  • Permits the purchase of mitigation credits under the Corps’ regulations as part of a contract to satisfy mitigation requirements.
  • Requires the Secretary to ensure compliance with the Corps and EPA final rule on compensatory mitigation for aquatic resources.

Legislative Activity

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1 earlier action
SenateIntro Referral Latest Action

Read twice and referred to the Committee on Environment and Public Works. (Sponsor introductory remarks on measure: CR S2876)

April 18, 2024

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SenateIntro Referral

Introduced in Senate

April 18, 2024

SenateIntro Referral

Read twice and referred to the Committee on Environment and Public Works. (Sponsor introductory remarks on measure: CR S2876)

April 18, 2024

Floor Debate

2 members

What members said about S. 4157 on the floor

2 Democrats
Alex Padilla
Sen. Alex PadillaD-CA · Apr 18, 2024

Madam President, I rise to introduce bipartisan legislation that aims to improve flexibility around compensatory and environmental mitigation for U.S Army Corps of Engineers Civil Works…

Alex Padilla
Sen. Alex PadillaD-CA · Apr 18, 2024

Madam President, I rise to introduce bipartisan legislation that aims to improve flexibility around compensatory and environmental mitigation for U.S Army Corps of Engineers Civil Works…

Richard J. Durbin
Sen. Richard J. DurbinD-IL · Apr 18, 2024

Madam President, I ask unanimous consent that the text of the bill be printed in the Record.

Bill Text

Latest available legislative text

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Introduced in SenateIssued April 18, 2024

II

118th CONGRESS

2d Session

S. 4157

IN THE SENATE OF THE UNITED STATES

April 18, 2024

Mr. Padilla (for himself and Mr. Tillis) introduced the following bill; which was read twice and referred to the Committee on Environment and Public Works

A BILL

To amend the Water Resources Development Act of 1986 to improve compensatory mitigation, and for other purposes.

1.

Short title

This Act may be cited as the Improving Corps Civil Works Compensatory Mitigation Act.

2.

Fish and wildlife mitigation

Section 906 of the Water Resources Development Act of 1986 (33 U.S.C. 2283) is amended—

(1)

in subsection (d)(3)(B)(iv)—

(A)

in subclause (I), by inserting or contract (as defined in subsection (i)(1)) after instrument; and

(B)

in subclause (II), by inserting or contract (as so defined) after instrument;

(2)

in subsection (i)—

(A)

by redesignating paragraphs (1) through (4) as paragraphs (2) through (5), respectively;

(B)

by inserting before paragraph (2) (as so redesignated) the following:

(1)

Definition of contract

In this subsection, the term contract means an agreement between the Secretary and a mitigation provider that—

(A)

uses accepted Corps of Engineers District-level mitigation practices described in part 332 of title 33, Code of Federal Regulations (or successor regulations); and

(B)

prioritizes implementation of an existing restoration plan developed by a State, local, or regional entity that covers the area or resources affected by the civil works project that is the subject of the third-party arrangement.

;

(C)

in subparagraph (A) of paragraph (2) (as so redesignated)—

(i)

in clause (i), by striking and at the end; and

(ii)

by adding at the end the following:

(iii)

the purchase of credits under part 332 of title 33, Code of Federal Regulations (or successor regulations) in accordance with section 332.4(c)(6) of that title (or a successor regulation) through a contract to satisfy the mitigation plan required under subsection (d); and

;

(D)

in paragraph (3) (as so redesignated), by striking paragraph (1) and inserting paragraph (2); and

(E)

in paragraph (4) (as so redesignated), in the matter preceding subparagraph (A)—

(i)

by inserting the Secretary shall ensure that before contributions; and

(ii)

by striking may; and

(3)

by adding at the end the following:

(l)

Compliance

In carrying out this section, the Secretary shall ensure compliance with this section and with the final rule of the Corps of Engineers and the Environmental Protection Agency entitled Compensatory Mitigation for Losses of Aquatic Resources (73 Fed. Reg. 19594 (April 10, 2008)) or any subsequent rule.

.