Title 33, Navigation and Navigable WatersRelease 119-102

§516 Apportionment of Cost

Title 33 › CHAPTER 11 — BRIDGES OVER NAVIGABLE WATERS › SUBCHAPTER II — ALTERATION OF BRIDGES › § 516

Last updated Aug 21, 2026|Official source

Summary

When the Secretary allows a bridge owner to start an alteration and after the owner has had a chance to speak, the Secretary must decide how much of the total project cost the United States will pay and how much the bridge owner must pay. The owner must pay the part that comes from direct benefits to the owner, like expected savings on repairs and maintenance, and the part tied to traffic needs (railroad or highway), including work to increase load capacity. The owner also pays a share of the old bridge’s original cost based on how much of its useful life has already been used. If the change is wanted partly because the bridge blocks navigation and partly for some other reason, the Secretary may make people who want it changed for the other reason help pay. If the owner does the work in separate bids, the Secretary can set the full cost split using the first accepted bid and an estimate for the rest. The Secretary may later adjust the cost split if conditions change.

Full Legal Text

Title 33, §516

Navigation and Navigable Waters, Source: USLM XML via OLRC

At the time the Secretary shall authorize the bridge owner to proceed with the project, as provided in section 515 of this title, and after an opportunity to the bridge owner to be heard thereon, the Secretary shall determine and issue an order specifying the proportionate shares of the total cost of the project to be borne by the United States and by the bridge owner. Such apportionment shall be made on the following basis: The bridge owner shall bear such part of the cost as is attributable to the direct and special benefits which will accrue to the bridge owner as a result of the alteration, including the expectable savings in repair or maintenance costs; and that part of the cost attributable to the requirements of traffic by railroad or highway, or both, including any expenditure for increased carrying capacity of the bridge, and including such proportion of the actual capital cost of the old bridge or of such part of the old bridge as may be altered or changed or rebuilt, as the used service life of the whole or a part, as the case may be, bears to the total estimated service life of the whole or such part: Provided, That in the event the alteration or relocation of any bridge may be desirable for the reason that the bridge unreasonably obstructs navigation, but also for some other reason, the Secretary may require equitable contribution from any interested person, firm, association, corporation, municipality, county, or State desiring such alteration or relocation for such other reason, as a condition precedent to the making of an order for such alteration or relocation. The United States shall bear the balance of the cost, including that part attributable to the necessities of navigation: And provided further, That where the bridge owner proceeds with the alteration on a successive partial bid basis the Secretary is authorized to issue an order of apportionment of cost for the entire alteration based on the accepted bid for the first part of the alteration and an estimate of cost for the remainder of the work. The Secretary is authorized to revise the order of apportionment of cost, to the extent he deems reasonable and proper, to meet any changed conditions.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Amendments

1958—Pub. L. 85–640 permitted issuance of an order of apportionment of cost for entire alteration based on the accepted bid for first part of alteration and an estimate of cost for remainder of work where bridge owner proceeds with alteration on a successive partial bid basis. 1952—Act July 16, 1952, made railroads share equally with proprietors of highways in bearing cost of alterations necessary to remove obstacles to navigation.

Reference

Citations & Metadata

Citation

33 U.S.C. § 516

Title 33, Navigation and Navigable Waters

Last Updated

Aug 21, 2026

Release point: 119-102