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Title 43 — Public Lands

Chapter 32B — Colorado River Floodway

§ 1600c. Colorado River Floodway

Statutory text

(a)

Establishment

There is established the Colorado River Floodway as identified and generally depicted on maps that are to be submitted by the Secretary.

(b)

Study of tributary floodflows; determination of Floodway boundary

Within eighteen months after , the Secretary, in consultation with the seven Colorado River Basin States, represented by persons designated by the Governors of those States, the Colorado River Floodway Task Force, and any other interested parties shall:

(1)

complete a study of the tributary floodflows downstream of Davis Dam;

(2)

define the specific boundaries of the Colorado River Floodway so that the Floodway can accommodate either a one-in-one hundred year river flow consisting of controlled releases and tributary inflow, or a flow of forty thousand cubic feet per second (cfs), whichever is greater, from below Davis Dam to the Southerly International Boundary between the United States of America and the Republic of Mexico.

(c)

Review and modification of boundaries; notice and comment; written justification for decision of Secretary

(1)

The Secretary shall conduct, at least once every five years, a review of the Colorado River Floodway and make, after notice to and in consultation with appropriate chief executive officers of States, counties, municipalities, water districts, Indian tribes, or equivalent jurisdictions in which the Floodway is located, and others, such minor and technical modifications to the boundaries of the Floodway as are necessary solely to reflect changes that have occurred in the size or location of any portion of the floodplain as a result of natural forces, and as necessary pursuant to subsection (c) of section 1600e of this title.

(2)

If, in the case of any minor and technical modification to the boundaries of the Floodway made under the authority of this subsection, an appropriate chief executive officer of a State, county, municipality, water district, Indian tribe, or equivalent jurisdiction, to which notice was given in accordance with this subsection files comments disagreeing with all or part of the modification and the Secretary makes a modification which is in conflict with such comments, the Secretary shall submit to the chief executive officer a written justification for his failure to make modifications consistent with such comments or proposals.

Legislative history

Reconstructed from this section’s Code source credit and amendment notes, resolved against the local Statutes at Large. Editorial notes are evidence, not the law that made the change.

  1. Pub. L. 99–450 § 5 · 100 Stat. 1129

    Enacted · 43 U.S.C. § 1600c

    Pub. L. 99–450, § 5, Oct. 8, 1986, 100 Stat. 1131

    Source evidence

    Code source credit
    Pub. L. 99–450, § 5, Oct. 8, 1986, 100 Stat. 1131

    Enacted provision · exact public law section
    Sec. 5. (a) There is established the Colorado River Floodway as 43 USC 1600c. identified and generally depicted on maps that are to besubmitted by the Secretary. (b) (1) Within eighteen months after the date of enactment of this Act, the Secretary, in consultation with the seven Colorado River Basin States, represented by persons designated by the Governors of those States, the Colorado River Floodway Task Force, and any other interested parties shall: (i) complete a study of the tributary floodflows downstream of Davis Dam. Davis Dam; (ii) define the specific boundaries of the Colorado River Floodway so that the Floodway can accommodate either a one-in-one hundred year river flow consisting of controlled releases and tributary inflow, or a flow of forty thousand cubic feet per second (cfs), whichever is greater, from below Davis Dam to the Southerly International Boundary between the United States of America and the Republic of Mexico. (2) As soon as practicable after the determination of the Floodway boundary pursuant to this subsection, the Secretary shall prepare and file with the Committees maps depicting the Colorado River Floodway, and each such map shall be considered a standard map to be adhered to by all agencies and shall have the same force and effect as if included in this Act, except that correction of clerical and typographical errors in each such map may be made. Each such map shall be on file and available for public inspection in the Office of the Commissioner of the Bureau of Reclamation, Department of the Interior, and in other appropriate offices of the Department. (3) The Secretary shall provide copies of the Colorado River State and local governments. Indians. Banks and banking. Floodway maps to (A) the chief executive officer of each State, county, municipality, water district, Indian tribe, or equivalent jurisdiction in which the Floodway is located, (B) each appropriate Federal agency, including agencies which regulate Federal financial institutions, and (C) each federally insured financial institution which serves the geographic area as one of its primary markets. (c) (1) The Secretary shall conduct, at least once every five years, a review of the Colorado River Floodway and make, after notice to and in consultation with the appropriate officers referred to in paragraph (3) of subsection (b), and others, such minor and technical modifications to the boundaries of the Floodway as are necessary solely to reflect changes that have occurred in the size or location of any portion of the floodplain as a result of natural forces, and as necessary pursuant to subsection (c) of section (7) of this Act. (2) State and local governments. Indians. If, in the case of any minor and technical modification to the boundaries of the Floodway made under the authority of this subsection, an appropriate chief executive officer of a State, county, municipality, water district, Indian tribe, or equivalent jurisdiction, to which notice was given in accordance with this subsection files comments disagreeing with all or part of the modification and the Secretary makes a modification which is in conflict with such comments, the Secretary shall submit to the chief executive officer a written justification for his failure to make modifications consistent with such comments or proposals.

  2. An Act to provide for the conservation of anthracite coal resources through measures of flood control and anthracite mine drainage, and for other purposes

    Pub. L. 105–362 § 901(d)(1) · 112 Stat. 3280

    1. Struck · 43 U.S.C. § 1600c(b)

      Pub. L. 105–362, § 901(d)(1), struck out par. (1) designation

    2. Redesignated · 43 U.S.C. § 1600c(b)

      Pub. L. 105–362, § 901(d)(1), redesignated cls. (i) and (ii) of former par. (1) as pars. (1) and (2), respectively

    3. Struck · 43 U.S.C. § 1600c(b)

      Pub. L. 105–362, § 901(d)(1), struck out former pars. (2) and (3) which related to preparation and filing of maps with congressional committees, Federal, State, and local government agencies, and federally insured financial institutions

    Source evidence

    Code amendment note
    Subsec. (b). Pub. L. 105–362, § 901(d)(1), struck out par. (1) designation, redesignated cls. (i) and (ii) of former par. (1) as pars. (1) and (2), respectively, and struck out former pars. (2) and (3) which related to preparation and filing of maps with congressional committees, Federal, State, and local government agencies, and federally insured financial institutions.

    Enacted provision · exact public law section
    (1) Repeal of requirements.— Section 5(b) of the Colorado River Floodway Protection Act (43 U.S.C. 1600c(b)) is amended— (A) by striking “(b)(1)” and inserting “(b)”; (B) by striking paragraphs (2) and (3); and (C) by redesignating clauses (i) and (ii) as paragraphs(1) and (2), respectively.

  3. An Act to provide for the conservation of anthracite coal resources through measures of flood control and anthracite mine drainage, and for other purposes

    Pub. L. 105–362 § 901(d)(2) · 112 Stat. 3280

    Substituted · 43 U.S.C. § 1600c(c)(1)

    Pub. L. 105–362, § 901(d)(2), substituted “appropriate chief executive officers of States, counties, municipalities, water districts, Indian tribes, or equivalent jurisdictions in which the Floodway is located,” for “the appropriate officers referred to in paragraph (3) of subsection (b) of this section,”

    Source evidence

    Code amendment note
    Subsec. (c)(1). Pub. L. 105–362, § 901(d)(2), substituted “appropriate chief executive officers of States, counties, municipalities, water districts, Indian tribes, or equivalent jurisdictions in which the Floodway is located,” for “the appropriate officers referred to in paragraph (3) of subsection (b) of this section,”.

    Enacted provision · exact public law section
    (2) Conforming amendment.— Section 5(c)(1) of such Act(43 U.S.C. 1600c(c)(1)) is amended by striking “the appropriate officers referred to in paragraph (3) of subsection (b),” and inserting “appropriate chief executive officers of States, counties, municipalities, water districts, Indian tribes, or equivalent jurisdictions in which the Floodway is located,”.

5 of 5 references resolved to an enrolled provision

Editorial Notes

Amendments

1998—Subsec. (b). Pub. L. 105–362, § 901(d)(1), struck out par. (1) designation, redesignated cls. (i) and (ii) of former par. (1) as pars. (1) and (2), respectively, and struck out former pars. (2) and (3) which related to preparation and filing of maps with congressional committees, Federal, State, and local government agencies, and federally insured financial institutions.

Subsec. (c)(1). Pub. L. 105–362, § 901(d)(2), substituted “appropriate chief executive officers of States, counties, municipalities, water districts, Indian tribes, or equivalent jurisdictions in which the Floodway is located,” for “the appropriate officers referred to in paragraph (3) of subsection (b) of this section,”.

Credits

1986–1998 · 2 acts
  1. 1986Pub. L. 99–450, § 5, , 100 Stat. 1131
  2. 1998Pub. L. 105–362, title IX, § 901(d), , 112 Stat. 3289.
Show as published

(Pub. L. 99–450, § 5, , 100 Stat. 1131; Pub. L. 105–362, title IX, § 901(d), , 112 Stat. 3289.)

Parsed from the official OLRC USLM XML in data/usc_all/usc43.xml · release point 119-108 · OLRC build 2026-04-17

USLM identifier /us/usc/t43/s1600c