23 CFR 661.17: What are the criteria for bridge eligibility?

(a) For bridge replacement or rehabilitation, TTF bridges are required to meet the following:

(1) Must meet the definition of a TTF bridge;

(2) Be classified as a Tribal transportation facility;

(3) Be classified as in poor condition, have low load capacity, or need highway geometric improvements;

(4) Be recorded in the NBI maintained by FHWA;

(b) For new bridge construction, TTF bridges are required to meet the following:

(1) Be classified as a Tribal transportation facility;

(2) Be a public bridge that meets the definition of a TTF bridge and recorded in the NBI after project completion.