US Code

Public Law 119-73 (01/23/2026)

43 U.S.C. § 508

Costs incurred in the modification of structures

(a)

Costs resulting from age and normal deterioration or lack of maintenance of structures

Costs heretofore or hereafter incurred in the modification of structures under this subchapter, the cause of which results from age and normal deterioration of the structure or from nonperformance of reasonable and normal maintenance of the structure by the operating entity shall be considered as project costs and will be allocated to the purposes for which the structure was authorized initially to be constructed and will be reimbursable as provided by existing law.

(b)

Nonreimbursable costs resulting from new hydrologic or seismic data or changes in criteria

43 U.S.C. 509With respect to the $100,000,000 authorized to be appropriated in the Reclamation Safety of Dams Act of 1978 [], costs heretofore or hereafter incurred in the modification of structures under this subchapter, the cause of which results from new hydrologic or seismic data or changes in state-of-the-art criteria deemed necessary for safety purposes shall be nonreimbursable and nonreturnable under the Federal Reclamation law.

(c)

Reimbursement of certain modification costs

section 509 of this titleWith respect to the additional amounts authorized to be appropriated by , costs incurred in the modification of structures under this subchapter, the cause of which results from new hydrologic or seismic data or changes in state-of-the-art criteria deemed necessary for safety purposes, shall be reimbursed to the extent provided in this subsection.
(1)
Fifteen percent of such costs shall be allocated to the authorized purposes of the structure, except that in the case of Jackson Lake Dam, Minidoka Project, Idaho-Wyoming, such costs shall be allocated in accordance with the allocation of operation and maintenance charges.
(2)
Costs allocated to irrigation water service and capable of being repaid by the irrigation water users shall be reimbursed within 50 years of the year in which the work undertaken pursuant to this subchapter is substantially complete. Costs allocated to irrigation water service which are beyond the water users’ ability to pay shall be reimbursed in accordance with existing law.
(3)
79 Stat. 21316 U.S.C. 460l Costs allocated to recreation or fish and wildlife enhancement shall be reimbursed in accordance with the Federal Water Project Recreation Act (), as amended [–12 et seq.].
(4)
16 U.S.C. 460l Costs allocated to the purpose of municipal, industrial, and miscellaneous water service, commercial power, and the portion of recreation and fish and wildlife enhancement costs reimbursable under the Federal Water Project Recreation Act [–12 et seq.], shall be repaid within 50 years with interest. The interest rate used shall be determined by the Secretary of the Treasury, taking into consideration average market yields on outstanding marketable obligations of the United States with remaining periods to maturity comparable to the applicable reimbursement period during the month preceding the fiscal year in which the costs are incurred. To the extent that more than one interest rate is determined pursuant to the preceding sentence, the Secretary of the Treasury shall establish an interest rate at the weighted average of the rates so determined.
(d)

Contracts for return of costs

Provided, howeversection 390cc(a) of this titleThe Secretary is authorized to negotiate appropriate contracts with project beneficiaries providing for the return of reimbursable costs under this subchapter: , That no contract entered into pursuant to this subchapter shall be deemed to be a new or amended contract for the purposes of .

(e)

Cost containment; modification status

(1)
During the construction of the modification, the Secretary shall consider cost containment measures recommended by a project beneficiary that has elected to consult with the Bureau of Reclamation on a modification.
(2)
The Secretary shall provide to project beneficiaries on a periodic basis notice regarding the costs and status of the modification.

Pub. L. 95–578, § 492 Stat. 2471Pub. L. 98–404, § 1(1)98 Stat. 1481Pub. L. 106–377, § 1(a)(2) [title II]114 Stat. 1441Pub. L. 107–117, div. B, § 503(1)115 Stat. 2308Pub. L. 108–439118 Stat. 2627(, , ; , (2), , ; , , , 1441A–67; , , ; , §§ 1(a), 2(a), , .)

Editorial Notes

References in Text

section 509 of this titlesection 509 of this titleThe $100,000,000 authorized to be appropriated in the Reclamation Safety of Dams Act of 1978, referred to in subsec. (b), probably refers to the authorization originally contained in . See 1984 Amendment note set out under .

act June 17, 1902, ch. 109332 Stat. 388section 506 of this titlesection 371 of this titleThe Federal Reclamation law, referred to in subsec. (b), probably means , , and Acts amendatory thereof and supplementary thereto. See . Act , popularly known as the Reclamation Act, is classified generally to this chapter. For complete classification of act , to the Code, see Short Title note set out under and Tables.

Pub. L. 89–7279 Stat. 213llThe Federal Water Project Recreation Act, referred to in subsec. (c)(3), (4), is , , , which is classified principally to part C (§ 460–12 et seq.) of subchapter LXIX of chapter 1 of Title 16, Conservation. For complete classification of this Act to the Code, see Short Title note set out under section 460–12 of Title 16 and Tables.

Amendments

Pub. L. 108–439, § 1(a)section 509 of this title2004—Subsec. (c). , inserted “Reimbursement of certain modification costs” as heading and substituted “With respect to the additional amounts authorized to be appropriated by ” for “With respect to the additional $650,000,000 authorized to be appropriated in The Reclamation Safety of Dams Act Amendments of 1984, and the additional $95,000,000 further authorized to be appropriated by amendments to that Act in 2000, and the additional $32,000,000 further authorized to be appropriated by amendments to the Act in 2001” in introductory provisions.

Pub. L. 108–439, § 2(a)Subsec. (e). , added subsec. (e).

Pub. L. 107–1172002—Subsec. (c). inserted “and the additional $32,000,000 further authorized to be appropriated by amendments to the Act in 2001,” after “2000,” in introductory provisions.

Pub. L. 106–3772000—Subsec. (c). inserted “and the additional $95,000,000 further authorized to be appropriated by amendments to that Act in 2000,” after “1984,” in introductory provisions.

Pub. L. 98–404, § 1(1)1984—Subsec. (b). , substituted “With respect to the $100,000,000 authorized to be appropriated in the Reclamation Safety of Dams Act of 1978, costs” for “Costs”.

Pub. L. 98–404, § 1(2)Subsecs. (c), (d). , added subsecs. (c) and (d).