Talk:Historic Columbia River Highway/Bridges

Bridges and tunnels (and viaducts?) which are contributing structures in NRHP-listed and NHL-listed Historic Columbia River Highway, and which should be added, at least, to List of bridges on the National Register of Historic Places in Oregon. Which includes tunnels, and maybe should include viaducts. See Talk:Historic_Columbia_River_Highway.

Add NHL doc reference, use info therein to create/improve articles' coverage of these.

These are contributing structures in the Historic Columbia River Highway, which was listed on the National Register of Historic Places in 1983, and was further designated a National Historic Landmark District in 2000.

Notes:
 * I dropped a couple items named "overlook" or other which might be contributing structures but which would seem not to be bridges or tunnels. I dunno about places named "loops". --Doncram (talk) 17:35, 12 January 2022 (UTC)
 * I dropped the Rowena Loops (now a redirect to an anchor within a state park article), which is apparently a set of horseshoe curves. --Doncram (talk) 17:44, 12 January 2022 (UTC)
 * I dropped Figure-Eight Loops which is a redirect to Guy W. Talbot State Park (which shows the topic in bold), which are horseshoe curves. --Doncram (talk) 17:48, 12 January 2022 (UTC)