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The Hoover Dam and Roosevelt Dam are listed under the "Vehicular Bridges in Arizona MPS" but are not really bridges. -- NE2 18:30, 4 May 2008 (UTC) reply

About historic bridges in Arizona (and there are many NRHP-listed ones), the Arizona state DOT apparently has, for each county, a document discussing the bridges in that county, e.g. https://azdot.gov/sites/default/files/2019/07/long_inventory_forms_apache.pdf for Apache County, Arizona bridges. It has more recent photos and info for the Allentown Bridge, for example, than was available at dates of its HABS/HAER and NRHP listings. [Thanks, User:Onel5969 about this source!] --Doncram ( talk, contribs) 18:51, 20 January 2023 (UTC) reply