1928+1953+2007+L&N US-90 Bay St. Louis Bridges over Bay St. Louis at Bay St. Louis, MS

1928: (Archived Bridge Hunter; Bridge Hunter)

1953: (Archived Bridge Hunter; Bridge Hunter)

2007: (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)

CSX/L&N: (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)

The 1953 bridge was destroyed by Hurricane Katrina in 2005. [BridgeHunter_1953]

Joseph Kempker, Jul 2023
I love Mississippi posted
The Bay St. Louis bridge post Katrina. Amazing.

Sandra Spano: I-10 over the lake also looked like that.

[And Pensacola Bay Bridge after Ivan hit it in 2004.]

Dennis White: they rebuilt bay Bridge in 12.mos

BridgeHunter_1953

The bridge is 11,090' (3.4km, 2.1 miles) long.

Street View, Apr 2023

Did they replace the piers?

Street View, Apr 2023

1928 Bridge

The original (1928) bridge was a wooden trestle.

HancockCountyHistoricalSociety via ArchivedBridgeHunter_1928

HancockCountyHistoricalSociety

Hancock County Historical Society via BridgeHunter_1928

1953 Bridge

abitamysteryhouse via ArchivedBridgeHunter_1953

"Bascule bridge with girder approaches" [ArchivedBridgeHunter_1953] So were the concrete or steel girders? I'm guessing that the bascule bridge was a trunnion bridge. Looking at a street view above, it appears the 2007 has enough clearance for the navigation channel that it doesn't need a moveable span.

NOAA via BridgeHunter_1953

More 2007 Bridge

2010 Photo by Nathan Morton via ArchivedBridgeHunter_2007
"Looking east from Bay St Louis along the oil containment boom after the BP spill"

CSX/L&N Bridge

The area has more boat activity than rail activity if the default position is open. Note that every other pier is different.

Street View, Apr 2023

Actually, the span was closed in about half of the available views.

Street View, Mar 2021

1949,1986 Tarentum Bridge over Alegheny River at Tarentum, PA

(Archived Bridge Hunter; Bridge Hunter; Historic Bridges; pghbridges; Satellite) George Stuart Memorial Bridge

This 1,784' (544m) long bridge has a main span of 446' (136m). [HistoricBridges]

Street View, Sep 2021

Jackson-Township historical preservation posted

Richard & Robert Gunst in Tarentum Park with the Tarentum Bridge under construction in the background in Tarentum, Allegheny County in May of 1951. This photo is from the Alle-Kiski Valley Historical Society.

(Photo from Raymond Rieser via https://www.facebook.com/groups/232382343450800/)

Old Postcard via BridgeHunter

It is hard to see in the photos, but the bridge is on a significant slant with a bluff on one end and a flood plain on the other. 

pghbridges
"Elevation drawing looking downstream"

Vizcaya Transporter Bridge over Nervion River in Portugalete, Spain

(Satellite)

Street View, Jul 2024

Paul Suderow (Realidad_360), May 2017

Salty Light Media, Nov 2022

Heritage Unlocked posted
The Vizcaya Bridge, the world's oldest surviving (although partially rebuilt) Transporter Bridge.
Heritage Unlocked shared with the same comment.

Dave Cocks commented on the above post
June 2024

 industrialdia basquetour, Jan 2020

Newport Transporter Bridge over River Usk in Newport, UK

(Satellite)

Street View, Aug 2023

Phil Beech posted four photos with the comment: "Newport Transporter Bridge Newport, South Wales UK. One of only 2 left in the UK. You used to be able to climb a stairway to the top gantry - impressive structure and views!"

Mark Watson: Not to forget Warrington and Middlesbrough transporter bridges!

Phil Beech: Mark - I should have added that - at the time these photos were taken - 2018 - it was one of two working transporter bridges. I understand Warrington is now permanently closed and Middlesbrough shut for safety reasons in 2019. Newport bridge is closed at the moment as they are building a large heritage centre next to it. It is planned to reopen this year I believe.

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1973 100mw Cordell Hull Lock and Dam and Old Lock #7 on Cumberland River near Carthage, TN

Cordel: (Satellite)

Old Lock #7: (Satellite, I think that is the bank-side lock wall that remains.)   

2025 TVA Flood

Cordell Hull Lake posted 0:21 video

🌊 Power and Precision: Cordell Hull Dam in Action!

Right now [Feb 16, 2025], Cordell Hull Dam is releasing 55,000 cubic feet per second (CFS) of water—that’s like emptying an Olympic-sized swimming pool every two seconds! 💦

Controlled releases like this help manage water levels, reduce flood risks, and ensure safe navigation downstream. Dams play a crucial role in protecting communities and infrastructure, but they also require caution and awareness.

🚧 Stay Safe Around Dams:

⚠️ Always heed warning signs and barriers—water levels and currents can change rapidly.

Michael Davis 1:33 video

Marc Brumbaugh (magicnsc), Jul 2016, this part of a 360-degree view

Randy Glover, Oct 2023
[Looking at today's satellite image, they put a lot of fill in the river that they then had to remove.]

USACE, this is their idea of a high-resolution photo
The lock is 84' x 400' with a lift of 59'

"The Cordell Hull Dam, located on the Cumberland River in Tennessee, is a hydroelectric power project operated by the U.S. Army Corps of Engineers. The dam, a combination earth fill and concrete-gravity structure, is 87 feet [26.5m] high and 1,306 feet [398m] long. It has a generator capacity of 100 megawatts. The dam's primary purpose is to generate electricity for the surrounding communities, including Gallatin, Carthage, and Cookeville. " [Google Search AI]

This shows how they draw down the lake level during Winter and Spring to create more capacity for flood control.

USACE_basin

Old Lock #7

This was one of 15 locks for the predecessor 6-foot waterway. Today's waterway uses four locks: " Lake Barkley, Cheatham Lake, Old Hickory Lake, and Cordell Hull Lake." [USACE]

Wood Family (Barefoottravelers), Nov 2023

It is nice when an area doesn't have metal thieves.

Sheperd Newton, Sep 2022

Lehigh Canal Lock #47 in Easton, PA

(Satellite)

Mark Madson, Jul 2019

I got the lock number of #47 from this post. Note that a bulkhead has been added between 2019 and 2025 at the upstream gate location to remove the water pressure on the wooden gate.

Metrotrails added

Lehigh Canal Lock 47, Easton Pa.

This was historically a double lock, and one of them had been kept in good repair for many years as part of Hugh Moore Park. Unfortunately, it appears to be in rough condition and braced up today.

1883+1987 Low- and 1968 I-80 High-Level Bridges over Allegheny River at Emlenton, PA

High-Level: (Satellite)

Low-Level: (Satellite)

The dates in the title come from wikipedia_low.

High Level

Street View, Oct 2008

Low Level

Street View, Oct 2018
Note the high-level bridge in the right background.

Note how the depth of the truss makes the semi-trucks look small.

Street View, Oct 2018

 

S J, Apr 2022

 

Doug Kerr, CC BY-SA 2.0, via Wikimedia Commons

 

Phil Martin Photography posted
The Emlenton Bridge on I80 sits in three counties Butler, Clarion and Venango County. It’s about 270 feet above the Allegheny River.

Jackson-Township historical preservation added
Keystone Shortway Bridge (I-80), over the Allegheny River at Emlenton, Venango County. This bridge is the highest in the East. This modern super-highway, between Sharon and Stroudsburg, provides the fastest direct route across the state and easy access to many choice recreational areas.
[I-80 in Pennsylvania is called the Keystone Shortway.
As with most suppleratives, the qualifier "when constructed" is needed for the highest bridge claim. The 1988 I-64 Glade Creek Bridge is 700' (213m) high, and the 1977 US-19 New River Gorge Bridge is 876' (267m) high. Both of these are in the East.]
Ken Rupert shared
As a teenager, I saw this bridge being built from the smaller bridge in the background! 🙂My Dad referred to the "Keystone Shortway Bridge" as the "Emlenton High Level Bridge" Was there a name for the smaller bridge other than the "Emlenton bridge" as I remember? Yes, the new I-80 bridge sure saved a Lot of time if you look at the winding roads in the picture! 😉

Comments on the above add

"With a height of 270 feet (82 m) above the river, the Emlenton Bridge was the highest bridge in the Interstate Highway System when completed in 1968." [wikipedia_high]

Historic Bridges has a lot of bridges in Venango County, but not these two. In fact, there are no bridges over the Allegheny River.

This image would be between 1968 and 1987.

ebay [at least three copies of this image were for sale.]

HAER_data
The Whipple trusses were made with wrought iron. This bridge was pictured in the 1885 catalog for the builder, the Wrought Iron Bridge Company of Canton, OH.
[My first thought is that it should have been saved as a trail bridge. But looking at a map, I guess there is nothing on the south side to walk/bike to. So are there any fish in this river? I guess it was rather high to function as a fishing pier.]

The picture in the 1885 catalog.

HAER PA,61-EML,1-
39. PORTAL ELEVATION. Photocopy of engraving from illustrated pamphlet titled 'Wrought Iron Bridges Built by Wrought Iron Bridge Company,' Wrought Iron Bridge Company, Canton, Ohio, 1885 (artist unknown). - Emlenton Bridge, Spanning Allegheny River, Travel Route 38 (Legislative Route 75), Emlenton, Venango County, PA

As expected, the truss was pin connected.

HAER PA,61-EML,1-
6. VIEW OF SOUTH ABUTMENT, LOOKING SOUTH