Recent Puerto Rico Comments

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Posted April 13, 2022, by Luke

Lattice girder. Very common on Puerto Rico

Puente Plata (Puerto Rico)
Posted February 6, 2022, by Brandon Cooper

That remaining truss span looks like she is barely hanging on.

Posted January 5, 2022, by Luke

Thanks. I believe the proper credit in Spanish (Spanish is the dominant language of Puerto Rico.) is "Cortesía del libro "Los Puentes Históricos de Puerto Rico" de Luis Pumarada"

Posted January 5, 2022, by Geoff Hubbs

OK, changed URL

Posted January 5, 2022, by Luke

Geoff, the site you linked to got their picture from the book in the following link. Can you change the URL to the link to the book?

Posted May 27, 2019, by Luke

Doubtful, as concrete didn't really come into prominence until the early 1900s IIRC.

Posted May 27, 2019, by Dana and Kay Klein


Posted November 1, 2018, by Luke

Thank you for the information, Robert.

Do you happen to have a picture we could use?

Posted November 1, 2018, by Robert Ruiz (roca99324 [at] optonline [dot] net)

Hi. This bridge carries a rural/mountainous road that leads to Antillean Adventist University. To the best of my knowledge (and I have known this bridge since 1971) that road has never been named. On the nearest named road to this bridge, PR-106, there is --on the EB side-- a sign with an arrow pointing to the right and the words "Universidad Adventista de las Antillas". IMO, this entry should perhaps read "Facts: Overview: Pony truss bridge over Rio Yaguez on the road to Universidad Adventista de las Antillas." Thanks, RR

Posted June 15, 2018, by Luke

Further research uncovered the following from a NRHP MPS .pdf

Said .pdf:

Posted June 15, 2018, by Luke

Considering there are several lattice girders scattered across Puerto Rico that were constructed by Eugene Rollin & Co., also of Braine-le-Comte, Belgium, I'd say that furthers my suspicions.

Posted June 15, 2018, by Nathan Holth (webmaster [at] historicbridges [dot] org)

I would have to do a little more research, but off the top of my head, I can add to the conversation that Pont Turcot in Quebec was built by a Belgium company: Société Anonyme Internationale de Construction et d'Entreprises de Travaux Publics of Braine-le-Comte, Belgium. The company name translates via Google to "Anonymous Society International Building and Construction Companies" but somewhere I figured out a more accurate translation would be "International Engineering and Construction Company Limited." Given the name of the company I suspect they may have done business in other places too, perhaps here.

Posted June 15, 2018, by Luke

I finally found a bit of info on Spanish Wikipedia that gives us a lead on who built the bridge, stating that construction work was subcontracted to the "Société d'Entreprises et des Constructions des Colonies Espagnoles"

And from there on, everything is in French, and my French is even more rudimentary than my Spanish is...

Then there's this Google Books lead that mentions that Belgian bridges could be had for 2/3rds the cost of an American span, which leads me to believe the French subcontractor was ordering Belgian bridges, probably from the same manufacturer that constructed all of the extant Lattice Girders.

Anyone have any insight? I know Nathan and Jason have done more work in Europe than anyone else.

Spanish Wikipedia link:

Google Books link:

Posted June 15, 2018, by Luke

Sad news, one span was lost to Hurricane Maria:

Posted June 14, 2018, by Luke

Here's a rarity: Pin-connected truss built in the 1940s

Posted June 14, 2018, by Olga Prann (oprann [at] prtc [dot] net)

This bridge was constructed by Ing. Robert R. Prann,

the same that built the San Antonio Bridge i San juan

Posted March 7, 2018, by Robert (caro68506 [at] optonline [dot] net)



there are two rivers with the wrong names.

In the page above the spelling is given as "Portuguez River".

However, the correct spelling is "Portugues River" ("s" instead of "z"). The misspelled river names are under the "Crosses" column.

The other 19 "Portugues River" spellings are correct. Thank you.

Posted September 18, 2017, by Dana

Luke thanks as always. Wonder if James can add, Guam, Northern Mariana Islands, US Virgin Islands and American Samoa!

Posted September 18, 2017, by Luke

Dana, from what I've been able to uncover, 1981/2012 were rehab dates for the bridge.

Posted November 7, 2016, by Dana and Kay Klein

Thanks Luke!. glad you corrected.

Posted November 7, 2016, by Luke

Dana, the bridge in the streetview/google sphere you added was the northbound PR1 bridge, not the bridge this entry is for.

Posted June 30, 2016, by george oakley (georgeoakley49 [at] yahoo [dot] com)

Yes J.P. you can say this a bridge enthusiasts playground from what i see.

Posted June 29, 2016, by J.P. (wildcatjon2000 [at] gmail [dot] com)

so could we say this is a bridge enthusiasts playground?

Posted June 29, 2016, by Luke

I agree, George.

Better turned into a swingset support than melted down (Or worse, an "abstract" art piece.)

Art: Thanks! I ended up coming across the source for a bunch of stuff by accident.

It is too bad that the site isn't international, as there are some impressive bridges around the world.

Posted June 29, 2016, by Tony Dillon (spansaver [at] hotmail [dot] com)

Thanks Nathan!

I had heard of this type before, but really know nothing about it. Totally doesn't surprise me as it looks more girder and less truss.

A very cool structure nonetheless!

Posted June 29, 2016, by george oakley (georgeoakley49 [at] yahoo [dot] com)

Great way to repurpose a bridge i think.

Posted June 28, 2016, by Nathan Holth (nathan [at] historicbridges [dot] org)

Tony, I can tell you this is a standard European form of metal bridge, and over there they typically call these lattice girders. No idea if that tells you anything about how the engineering functions, but that is what they are known as.

Posted June 28, 2016, by Tony Dillon (spansaver [at] hotmail [dot] com)

That's one HELL of a swingset!!

Interesting "truss"...which really looks more like a Lattice girder. I would love to see testing on such a span to see the tension and compression compared to a traditional pony truss.

Posted June 27, 2016, by ArtS (asuckewer [at] knite [dot] com)


I like the Puerto Rican stuff! Really interesting, especially since it was a Spanish territory prior to 1898!

Its too bad we can't expand the site's scope. I've found info on Keystone and Phoenix bridges 'south of the border'


Art S.

Posted September 3, 2015, by Liz (tslizanette [at] aol [dot] com)

Recent picture of the bridge.

Posted September 2, 2015, by liz (tslizanette [at] aol [dot] com)

Here a photo i too a few years ago you can use here.

Posted February 3, 2011, by Nathan Holth (form3 [at] historicbridges [dot] org)

Here is a translation of the description on this photo:

The Marquis de la Serna bridge named in honor of Felix Maria Messina, who was Governor of Puerto Rico from 1862 to 1865. It was the first metal bridge built on the island, and the only laminated iron arch that exists today. The iron items were brought from France. The bridge is segmented arches are similar to the Arcola bridge in Paris. The structure is located 24 feet above the river level.

The bridge was assembled by Isidoro Abarca, founder of the Foundry Abarca, was mounted on the same anterior bridge abutments built of masonry and wood. Part of the road between Cataño and Bayamón, a major route between the island of San Juan and agricultural lands in the west and south. Between 1881 and 1900, the bridge served as part of the railway train from the west. For this reason, two of the arches strengthened in 1881.