# Monthly Photo Competition #20 – July, 2024 – “Bridges” \[Poll added\] **URL:** \ **Category:** Cafe Society\ **Tags:** photo\ **Created:** [July 5, 2024, 2:28pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772 "2024-07-05T14:28:04Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Mean\_Mr.Mustard](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mean_mr.mustard/32/3865_2.png) [@Mean\_Mr.Mustard](https://boards.straightdope.com/u/Mean_Mr.Mustard)\ **Post date:** [July 5, 2024, 2:28pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/1 "2024-07-05T14:28:04Z")
This is the monthly thread for **July** **,** **2024**. The topic this month is “ **Bridges** ”, chosen by Spiderman. Please note: The general rules for the competition are [here](https://boards.straightdope.com/t/sdmb-monthly-photo-competition-rolling-discussion-thread/975642). **One entry per person per month**. To make the photos easier to review please only post just **once** to this thread, with your entry. Your post can include a caption with whatever info you want to give. Please keep all discussion in the [rolling discussion thread](https://boards.straightdope.com/t/sdmb-monthly-photo-competition-rolling-discussion-thread/975642). Once the submission deadline has passed, I’ll put a voting poll **in this thread** **.** **Submission deadline: Friday, July 26, 11:45 pm US EDT** Good luck! ---
**Author:** ![chela](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chela/32/21582_2.png) [@chela](https://boards.straightdope.com/u/chela)\ **Post date:** [July 5, 2024, 3:03pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/2 "2024-07-05T15:03:39Z")
Canal St Railroad Bridge Chicago as seen from a river cruise. Now a landmark it’s a vertical lift bridge in use in the early 1900’s it could rise 111 ft in 45 seconds. Taken with an I phone in my right hand an old style in my left. 🙂‍↔ [![](https://i.ibb.co/YyJhQNT/IMG-9276.jpg) ](https://i.ibb.co/YyJhQNT/IMG-9276.jpg) ---
**Author:** ![Bob\_Blaylock](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bob_blaylock/32/3235_2.png) [@Bob\_Blaylock](https://boards.straightdope.com/u/Bob_Blaylock)\ **Post date:** [July 5, 2024, 6:16pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/3 "2024-07-05T18:16:24Z")
  A [**bridge** rectifier](https://en.wikipedia.org/wiki/Diode_bridge), made from four diodes, in front of an oscilloscope display showing what it does.  An alternating current (AC) signal is being fed into it via the black and white wires, and is displayed on the upper trace of the oscilloscope.  The ticked line on the oscilloscope grid, over the upper trace, indicates the zero-volt point.   The lower trace shows the direct current (DC) signal coming out of the **bridge** rectifier, via the red and green wires.  The line at the bottom of the waveform shown on that trace, is the zero-volt point.   A diode lets current flow in only one direction.  A **bridge** rectifier has the four diodes arranged so that whichever side of the AC signal is positive will only flow through the diode that is pointed toward the positive DC output, while whichever side is negative, will only flow through diode pointing toward the negative DC output. As the AC signal switches direction, which diodes it flows through switch accordingly.   Note that the output frequency of the DC signal is twice that of the AC signal, and is at zero at the same time that the AC signal is at zero, and goes positive as the AC signal goes either positive or negative.   If you were going to use this as a power supply, you’d probably want to put a big capacitor on the output of the **bridge** , to smooth out the ripple, and possibly a voltage regulator after that. [![](https://live.staticflickr.com/65535/53837181056_1da938fa24_o.jpg) ](https://live.staticflickr.com/65535/53837181056_1da938fa24_o.jpg) ---
**Author:** ![Bullitt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bullitt/32/5725_2.png) [@Bullitt](https://boards.straightdope.com/u/Bullitt)\ **Post date:** [July 6, 2024, 12:33am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/4 "2024-07-06T00:33:25Z")
The Golden Gate Bridge on a summer night [![](https://i.imgur.com/DnLmC3O.jpeg) ](https://i.imgur.com/DnLmC3O.jpeg) ---
**Author:** ![Karen\_Lingel](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/karen_lingel/32/18649_2.png) [@Karen\_Lingel](https://boards.straightdope.com/u/Karen_Lingel)\ **Post date:** [July 6, 2024, 1:22am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/5 "2024-07-06T01:22:43Z")
[![](https://i.imgur.com/XDMP52t.jpg) ](https://i.imgur.com/XDMP52t.jpg) Confederation Bridge. ---
**Author:** ![mixdenny](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mixdenny/32/2962_2.png) [@mixdenny](https://boards.straightdope.com/u/mixdenny)\ **Post date:** [July 6, 2024, 2:56am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/6 "2024-07-06T02:56:12Z")
Vermilion, Ohio bridge taken from my seat at a restaurant on the river. [[Album] imgur.com ![](https://i.imgur.com/Zd1usnf.jpeg?fb "imgur.com") ](https://imgur.com/a/ccdRAXm) ---
**Author:** ![Twoflower](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/twoflower/32/22_2.png) [@Twoflower](https://boards.straightdope.com/u/Twoflower)\ **Post date:** [July 6, 2024, 4:56pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/7 "2024-07-06T16:56:18Z")
Thomas Creek Bridge, southern Oregon coast. [![](https://lh3.googleusercontent.com/pw/AP1GczOQXi7DfHu0kseZjC0PB6MwmJKLJaRTZ_EvrgVyYMuX83bvAUwl9QsTZckzbScBNEQ6m0BdYgldKAfJJZ-Z1Y9GF77he6inYP4pP4FH9el0YlXR1BqznYpavyqBzSOjdRzpIJ8-m0do53bY-v318QmWXA=w1280-h960-s-no?authuser=1) ](https://lh3.googleusercontent.com/pw/AP1GczOQXi7DfHu0kseZjC0PB6MwmJKLJaRTZ_EvrgVyYMuX83bvAUwl9QsTZckzbScBNEQ6m0BdYgldKAfJJZ-Z1Y9GF77he6inYP4pP4FH9el0YlXR1BqznYpavyqBzSOjdRzpIJ8-m0do53bY-v318QmWXA=w1280-h960-s-no?authuser=1) ---
**Author:** ![Pardel-Lux](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/pardel-lux/32/20182_2.png) [@Pardel-Lux](https://boards.straightdope.com/u/Pardel-Lux)\ **Post date:** [July 6, 2024, 5:01pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/8 "2024-07-06T17:01:17Z")
Who needs a bridge when you can fly? [![](https://i.imgur.com/muaRDy0.jpeg) ](https://i.imgur.com/muaRDy0.jpeg) ---
**Author:** ![beowulff](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/beowulff/32/542_2.png) [@beowulff](https://boards.straightdope.com/u/beowulff)\ **Post date:** [July 6, 2024, 5:12pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/9 "2024-07-06T17:12:14Z")
I have _so many_ bridge pics. But, this one is very recent, so I chose it for the contest: [![Imgur](https://i.imgur.com/lNwFxaG.jpeg "imgur.com") ](https://imgur.com/lNwFxaG) Double rainbow over the 32nd St. bridge crossing the Animas river in Durango, CO. Historic Durango & Silverton Narrow Gauge Railroad tracks in the foreground. ---
**Author:** ![Mean\_Mr.Mustard](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mean_mr.mustard/32/3865_2.png) [@Mean\_Mr.Mustard](https://boards.straightdope.com/u/Mean_Mr.Mustard)\ **Post date:** [July 7, 2024, 1:53am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/10 "2024-07-07T01:53:03Z")
The Mighty Mac (Mackinac Bridge) from a different perspective. [![Imgur](https://i.imgur.com/pRmE83H.jpeg "imgur.com") ](https://imgur.com/pRmE83H) ---
**Author:** ![Strinka](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/strinka/32/512_2.png) [@Strinka](https://boards.straightdope.com/u/Strinka)\ **Post date:** [July 7, 2024, 2:33pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/11 "2024-07-07T14:33:34Z")
Charles Bridge, in Prague [![](https://alex.strinka.net/photography/photos/Lx8pj0l.jpg) ](https://alex.strinka.net/photography/photos/Lx8pj0l.jpg) ---
**Author:** ![Zyada](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/zyada/32/3028_2.png) [@Zyada](https://boards.straightdope.com/u/Zyada)\ **Post date:** [July 10, 2024, 12:23am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/12 "2024-07-10T00:23:48Z")
Moon Bridge at the Fort Worth Japanese Gardens [![Imgur](https://live.staticflickr.com/210/479178074_4eede9597d_b.jpg "Moon Bridge, Japanese Gardens, Fort Worth") ](https://www.flickr.com/photos/zyada/479178074/) ---
**Author:** ![N9IWP](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/n9iwp/32/3154_2.png) [@N9IWP](https://boards.straightdope.com/u/N9IWP)\ **Post date:** [July 14, 2024, 11:38am UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/13 "2024-07-14T11:38:19Z")
Deception Pass Bridge - Whidbey Island, WA [[Album] imgur.com ![](https://i.imgur.com/FqTNIrM.jpeg?fb "imgur.com") ](https://imgur.com/a/xuFX9Hj) Brian ---
**Author:** ![JKellyMap](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jkellymap/32/15880_2.png) [@JKellyMap](https://boards.straightdope.com/u/JKellyMap)\ **Post date:** [July 14, 2024, 12:34pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/14 "2024-07-14T12:34:19Z")
I don’t have an entry. I thought you’d all enjoy knowing about photographer David Plowden. I bought his _Bridges_ book when I was studying landscape history in the early 1990s. Then, by chance, my neighbor since nine years ago, a historian/photographer, is an acquaintance of Plowden. Alerted by Plowden’s photos, I visited the Tunkahannock Viaduct (spelling?) in the 90s. It’s in rural Pennsylvania, about an hour from Scranton. It’s rather like the Pont du Gard (Roman aqueduct) in southern France. > **[BRIDGES | davidplowden](https://www.davidplowden.com/copy-of-steel)** ---
**Author:** ![Raza](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/raza/32/213_2.png) [@Raza](https://boards.straightdope.com/u/Raza)\ **Post date:** [July 14, 2024, 4:20pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/15 "2024-07-14T16:20:33Z")
A footbridge across a flowing stream in New Hampshire in early September. (reduced resolution to fit imgur size limits) [[Album] Serene Footbridge to Color ![](https://i.imgur.com/pRMK59M.jpeg?fb "Serene Footbridge to Color") ](https://imgur.com/a/BbZS1Fm) ---
**Author:** ![aurora\_maire](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/aurora_maire/32/328_2.png) [@aurora\_maire](https://boards.straightdope.com/u/aurora_maire)\ **Post date:** [July 18, 2024, 2:58pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/16 "2024-07-18T14:58:07Z")
The backyard at my old workplace. [![Imgur](https://i.imgur.com/FXAQkyr.jpeg "Imgur: The magic of the Internet") ](https://imgur.com/FXAQkyr) ---
**Author:** ![snowthx](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/snowthx/32/10660_2.png) [@snowthx](https://boards.straightdope.com/u/snowthx)\ **Post date:** [July 18, 2024, 3:34pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/17 "2024-07-18T15:34:52Z")
The Two Bridges, Folsom, CA: [![Imgur](https://i.imgur.com/mkxB1ew.jpeg "imgur.com") ](https://imgur.com/mkxB1ew) ---
**Author:** ![Chefguy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chefguy/32/138_2.png) [@Chefguy](https://boards.straightdope.com/u/Chefguy)\ **Post date:** [July 18, 2024, 3:49pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/18 "2024-07-18T15:49:01Z")
One of my favorite places to visit back in the day. The embassy is in Old Town, so I went there on a daily basis when working in Prague. ---
**Author:** ![zimaane](https://avatars.discourse-cdn.com/v4/letter/z/a3d4f5/32.png) [@zimaane](https://boards.straightdope.com/u/zimaane)\ **Post date:** [July 18, 2024, 4:02pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/19 "2024-07-18T16:02:30Z")
Kenilworth Aquatic Gardens Washington DC [![Imgur](https://live.staticflickr.com/65535/53865571235_a80dbdf77f_b.jpg "PXL\_20220514\_185741195~2") ](https://www.flickr.com/photos/31573076@N00/53865571235/) ---
**Author:** ![Crane](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/crane/32/3495_2.png) [@Crane](https://boards.straightdope.com/u/Crane)\ **Post date:** [July 21, 2024, 2:12pm UTC](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772/20 "2024-07-21T14:12:41Z")
Plank Bridge Perdido Key Florida. When I was a child the bridge was loose planks on fallen trunks. My family often fished our dinner there. Still planks, it survives, perhaps not for long. [![](https://i.imgur.com/EhhzCKh.jpghttps://i.imgur.com/EhhzCKh.jpg) ](https://i.imgur.com/EhhzCKh.jpghttps://i.imgur.com/EhhzCKh.jpg) [Next page](https://boards.straightdope.com/t/monthly-photo-competition-20-july-2024-bridges-poll-added/1003772.md?page=2)